105e627dcSAndy Fiddaman# tzdb data for North and Central America and environs 205e627dcSAndy Fiddaman 3503609a9SYuri Pankov# This file is in the public domain, so clarified as of 4503609a9SYuri Pankov# 2009-05-17 by Arthur David Olson. 5503609a9SYuri Pankov 6503609a9SYuri Pankov# also includes Central America and the Caribbean 7503609a9SYuri Pankov 8503609a9SYuri Pankov# This file is by no means authoritative; if you think you know better, 9503609a9SYuri Pankov# go ahead and edit the file (and please send any changes to 10503609a9SYuri Pankov# tz@iana.org for general use in the future). For more, please see 11503609a9SYuri Pankov# the file CONTRIBUTING in the tz distribution. 12503609a9SYuri Pankov 13503609a9SYuri Pankov# From Paul Eggert (1999-03-22): 14503609a9SYuri Pankov# A reliable and entertaining source about time zones is 15503609a9SYuri Pankov# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 16503609a9SYuri Pankov 17503609a9SYuri Pankov############################################################################### 18503609a9SYuri Pankov 19503609a9SYuri Pankov# United States 20503609a9SYuri Pankov 21503609a9SYuri Pankov# From Paul Eggert (1999-03-31): 22503609a9SYuri Pankov# Howse writes (pp 121-125) that time zones were invented by 23503609a9SYuri Pankov# Professor Charles Ferdinand Dowd (1825-1904), 24503609a9SYuri Pankov# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 25503609a9SYuri Pankov# His pamphlet "A System of National Time for Railroads" (1870) 26503609a9SYuri Pankov# was the result of his proposals at the Convention of Railroad Trunk Lines 27503609a9SYuri Pankov# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 28503609a9SYuri Pankov# but in 1872-05 he moved the proposed origin to Greenwich. 29503609a9SYuri Pankov 303508b934SYuri Pankov# From Paul Eggert (2018-03-20): 31503609a9SYuri Pankov# Dowd's proposal left many details unresolved, such as where to draw 32503609a9SYuri Pankov# lines between time zones. The key individual who made time zones 33503609a9SYuri Pankov# work in the US was William Frederick Allen - railway engineer, 34503609a9SYuri Pankov# managing editor of the Travelers' Guide, and secretary of the 35503609a9SYuri Pankov# General Time Convention, a railway standardization group. Allen 36503609a9SYuri Pankov# spent months in dialogs with scientific and railway leaders, 37503609a9SYuri Pankov# developed a workable plan to institute time zones, and presented it 38503609a9SYuri Pankov# to the General Time Convention on 1883-04-11, saying that his plan 39503609a9SYuri Pankov# meant "local time would be practically abolished" - a plus for 40503609a9SYuri Pankov# railway scheduling. By the next convention on 1883-10-11 nearly all 413508b934SYuri Pankov# railroads had agreed and it took effect on 1883-11-18. That Sunday 423508b934SYuri Pankov# was called the "day of two noons", as some locations observed noon 433508b934SYuri Pankov# twice. Allen witnessed the transition in New York City, writing: 44503609a9SYuri Pankov# 45503609a9SYuri Pankov# I heard the bells of St. Paul's strike on the old time. Four 46503609a9SYuri Pankov# minutes later, obedient to the electrical signal from the Naval 47503609a9SYuri Pankov# Observatory ... the time-ball made its rapid descent, the chimes 48503609a9SYuri Pankov# of old Trinity rang twelve measured strokes, and local time was 49503609a9SYuri Pankov# abandoned, probably forever. 50503609a9SYuri Pankov# 51503609a9SYuri Pankov# Most of the US soon followed suit. See: 52503609a9SYuri Pankov# Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56. 5305e627dcSAndy Fiddaman# https://dx.doi.org/10.2307/3105430 54503609a9SYuri Pankov 55503609a9SYuri Pankov# From Paul Eggert (2005-04-16): 56503609a9SYuri Pankov# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. 57503609a9SYuri Pankov# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). 58503609a9SYuri Pankov 59503609a9SYuri Pankov# From Paul Eggert (2006-03-22): 60503609a9SYuri Pankov# A good source for time zone historical data in the US is 61503609a9SYuri Pankov# Thomas G. Shanks, The American Atlas (5th edition), 62503609a9SYuri Pankov# San Diego: ACS Publications, Inc. (1991). 63503609a9SYuri Pankov# Make sure you have the errata sheet; the book is somewhat useless without it. 64503609a9SYuri Pankov# It is the source for most of the pre-1991 US entries below. 65503609a9SYuri Pankov 66503609a9SYuri Pankov# From Paul Eggert (2001-03-06): 67503609a9SYuri Pankov# Daylight Saving Time was first suggested as a joke by Benjamin Franklin 68503609a9SYuri Pankov# in his whimsical essay "An Economical Project for Diminishing the Cost 69503609a9SYuri Pankov# of Light" published in the Journal de Paris (1784-04-26). 70503609a9SYuri Pankov# Not everyone is happy with the results: 71503609a9SYuri Pankov# 72503609a9SYuri Pankov# I don't really care how time is reckoned so long as there is some 73503609a9SYuri Pankov# agreement about it, but I object to being told that I am saving 74503609a9SYuri Pankov# daylight when my reason tells me that I am doing nothing of the kind. 75503609a9SYuri Pankov# I even object to the implication that I am wasting something 76503609a9SYuri Pankov# valuable if I stay in bed after the sun has risen. As an admirer 77503609a9SYuri Pankov# of moonlight I resent the bossy insistence of those who want to 78503609a9SYuri Pankov# reduce my time for enjoying it. At the back of the Daylight Saving 79503609a9SYuri Pankov# scheme I detect the bony, blue-fingered hand of Puritanism, eager 80503609a9SYuri Pankov# to push people into bed earlier, and get them up earlier, to make 81503609a9SYuri Pankov# them healthy, wealthy and wise in spite of themselves. 82503609a9SYuri Pankov# 83503609a9SYuri Pankov# -- Robertson Davies, The diary of Samuel Marchbanks, 84503609a9SYuri Pankov# Clarke, Irwin (1947), XIX, Sunday 85503609a9SYuri Pankov# 86503609a9SYuri Pankov# For more about the first ten years of DST in the United States, see 87503609a9SYuri Pankov# Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint 88503609a9SYuri Pankov# (Carnegie Library of Pittsburgh, 1927). 895254d4faSAndy Fiddaman# https://web.archive.org/web/20160517155308/http://www.clpgh.org/exhibit/dst.html 90503609a9SYuri Pankov# 91503609a9SYuri Pankov# Shanks says that DST was called "War Time" in the US in 1918 and 1919. 92503609a9SYuri Pankov# However, DST was imposed by the Standard Time Act of 1918, which 93503609a9SYuri Pankov# was the first nationwide legal time standard, and apparently 94503609a9SYuri Pankov# time was just called "Standard Time" or "Daylight Saving Time". 95503609a9SYuri Pankov 96374df668SAndy Fiddaman# From Paul Eggert (2019-06-04): 97374df668SAndy Fiddaman# Here is the legal basis for the US federal rules. 98374df668SAndy Fiddaman# * Public Law 65-106 (1918-03-19) implemented standard and daylight saving 99374df668SAndy Fiddaman# time for the first time across the US, springing forward on March's last 100374df668SAndy Fiddaman# Sunday and falling back on October's last Sunday. 101374df668SAndy Fiddaman# https://www.loc.gov/law/help/statutes-at-large/65th-congress/session-2/c65s2ch24.pdf 102374df668SAndy Fiddaman# * Public Law 66-40 (1919-08-20) repealed DST on October 1919's last Sunday. 103374df668SAndy Fiddaman# https://www.loc.gov/law/help/statutes-at-large/66th-congress/session-1/c66s1ch51.pdf 104374df668SAndy Fiddaman# * Public Law 77-403 (1942-01-20) started wartime DST on 1942-02-09. 105374df668SAndy Fiddaman# https://www.loc.gov/law/help/statutes-at-large/77th-congress/session-2/c77s2ch7.pdf 106374df668SAndy Fiddaman# * Public Law 79-187 (1945-09-25) ended wartime DST on 1945-09-30. 107374df668SAndy Fiddaman# https://www.loc.gov/law/help/statutes-at-large/79th-congress/session-1/c79s1ch388.pdf 108374df668SAndy Fiddaman# * Public Law 89-387 (1966-04-13) reinstituted a national standard for DST, 109374df668SAndy Fiddaman# from April's last Sunday to October's last Sunday, effective 1967. 110374df668SAndy Fiddaman# https://www.govinfo.gov/content/pkg/STATUTE-80/pdf/STATUTE-80-Pg107.pdf 111374df668SAndy Fiddaman# * Public Law 93-182 (1973-12-15) moved the 1974 spring-forward to 01-06. 112374df668SAndy Fiddaman# https://www.govinfo.gov/content/pkg/STATUTE-87/pdf/STATUTE-87-Pg707.pdf 113374df668SAndy Fiddaman# * Public Law 93-434 (1974-10-05) moved the 1975 spring-forward to 114374df668SAndy Fiddaman# February's last Sunday. 115374df668SAndy Fiddaman# https://www.govinfo.gov/content/pkg/STATUTE-88/pdf/STATUTE-88-Pg1209.pdf 116374df668SAndy Fiddaman# * Public Law 99-359 (1986-07-08) moved the spring-forward to April's first 117374df668SAndy Fiddaman# Sunday. 118374df668SAndy Fiddaman# https://www.govinfo.gov/content/pkg/STATUTE-100/pdf/STATUTE-100-Pg764.pdf 119374df668SAndy Fiddaman# * Public Law 109-58 (2005-08-08), effective 2007, moved the spring-forward 120374df668SAndy Fiddaman# to March's second Sunday and the fall-back to November's first Sunday. 121374df668SAndy Fiddaman# https://www.govinfo.gov/content/pkg/PLAW-109publ58/pdf/PLAW-109publ58.pdf 122374df668SAndy Fiddaman# All transitions are at 02:00 local time. 123503609a9SYuri Pankov 124503609a9SYuri Pankov# From Arthur David Olson: 125503609a9SYuri Pankov# Before the Uniform Time Act of 1966 took effect in 1967, observance of 126503609a9SYuri Pankov# Daylight Saving Time in the US was by local option, except during wartime. 127503609a9SYuri Pankov 128503609a9SYuri Pankov# From Arthur David Olson (2000-09-25): 129503609a9SYuri Pankov# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 130503609a9SYuri Pankov# In the introduction, Oboler spoke of "Eastern Peace Time." 131503609a9SYuri Pankov# An AltaVista search turned up: 132b654b02dSYuri Pankov# https://web.archive.org/web/20000926032210/http://rowayton.org/rhs/hstaug45.html 133503609a9SYuri Pankov# "When the time is announced over the radio now, it is 'Eastern Peace 134503609a9SYuri Pankov# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 135503609a9SYuri Pankov# (August 1945) by way of confirmation. 136b654b02dSYuri Pankov# 137b654b02dSYuri Pankov# From Paul Eggert (2017-09-23): 138b654b02dSYuri Pankov# This was the V-J Day issue of the Clamdigger, a Rowayton, CT newsletter. 139503609a9SYuri Pankov 140503609a9SYuri Pankov# From Joseph Gallant citing 141503609a9SYuri Pankov# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 142503609a9SYuri Pankov# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 143503609a9SYuri Pankov# to switch to London for Attlee's address, but the American people 144503609a9SYuri Pankov# never got to hear his speech live. According to one press account, 145503609a9SYuri Pankov# CBS' Bob Trout was first to announce the word of Japan's surrender, 146503609a9SYuri Pankov# but a few seconds later, NBC, ABC and Mutual also flashed the word 147503609a9SYuri Pankov# of surrender, all of whom interrupting the bells of Big Ben in 148503609a9SYuri Pankov# London which were to precede Mr. Attlee's speech. 149503609a9SYuri Pankov 150503609a9SYuri Pankov# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 151503609a9SYuri Pankov# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 152503609a9SYuri Pankov# 153503609a9SYuri Pankov# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 154503609a9SYuri Pankov# Any announcement from Asia would reach St. John's New York newsroom on a 155503609a9SYuri Pankov# wire service teletype machine, which had prescribed signals for major news. 156503609a9SYuri Pankov# Associated Press, for example, would ring five bells before spewing out 157503609a9SYuri Pankov# typed copy of an important story, and 10 bells for news "of transcendental 158503609a9SYuri Pankov# importance." 159503609a9SYuri Pankov# 160503609a9SYuri Pankov# On Aug. 14, stalling while talking steadily into the NBC networks' open 161503609a9SYuri Pankov# microphone, St. John heard five bells and waited only to hear a sixth bell, 162503609a9SYuri Pankov# before announcing confidently: "Ladies and gentlemen, World War II is over. 163503609a9SYuri Pankov# The Japanese have agreed to our surrender terms." 164503609a9SYuri Pankov# 165503609a9SYuri Pankov# He had scored a 20-second scoop on other broadcasters. 166503609a9SYuri Pankov 167503609a9SYuri Pankov# From Arthur David Olson (2005-08-22): 168503609a9SYuri Pankov# Paul has been careful to use the "US" rules only in those locations 169503609a9SYuri Pankov# that are part of the United States; this reflects the real scope of 170503609a9SYuri Pankov# U.S. government action. So even though the "US" rules have changed 171503609a9SYuri Pankov# in the latest release, other countries won't be affected. 172503609a9SYuri Pankov 173f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 174503609a9SYuri PankovRule US 1918 1919 - Mar lastSun 2:00 1:00 D 175503609a9SYuri PankovRule US 1918 1919 - Oct lastSun 2:00 0 S 176503609a9SYuri PankovRule US 1942 only - Feb 9 2:00 1:00 W # War 177503609a9SYuri PankovRule US 1945 only - Aug 14 23:00u 1:00 P # Peace 178374df668SAndy FiddamanRule US 1945 only - Sep 30 2:00 0 S 179503609a9SYuri PankovRule US 1967 2006 - Oct lastSun 2:00 0 S 180503609a9SYuri PankovRule US 1967 1973 - Apr lastSun 2:00 1:00 D 181503609a9SYuri PankovRule US 1974 only - Jan 6 2:00 1:00 D 182374df668SAndy FiddamanRule US 1975 only - Feb lastSun 2:00 1:00 D 183503609a9SYuri PankovRule US 1976 1986 - Apr lastSun 2:00 1:00 D 184503609a9SYuri PankovRule US 1987 2006 - Apr Sun>=1 2:00 1:00 D 185503609a9SYuri PankovRule US 2007 max - Mar Sun>=8 2:00 1:00 D 186503609a9SYuri PankovRule US 2007 max - Nov Sun>=1 2:00 0 S 187503609a9SYuri Pankov 188503609a9SYuri Pankov# From Arthur David Olson, 2005-12-19 189503609a9SYuri Pankov# We generate the files specified below to guard against old files with 190503609a9SYuri Pankov# obsolete information being left in the time zone binary directory. 191503609a9SYuri Pankov# We limit the list to names that have appeared in previous versions of 192503609a9SYuri Pankov# this time zone package. 193503609a9SYuri Pankov# We do these as separate Zones rather than as Links to avoid problems if 194503609a9SYuri Pankov# a particular place changes whether it observes DST. 195503609a9SYuri Pankov# We put these specifications here in the northamerica file both to 196503609a9SYuri Pankov# increase the chances that they'll actually get compiled and to 197503609a9SYuri Pankov# avoid the need to duplicate the US rules in another file. 198503609a9SYuri Pankov 199374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 200503609a9SYuri PankovZone EST -5:00 - EST 201503609a9SYuri PankovZone MST -7:00 - MST 202503609a9SYuri PankovZone HST -10:00 - HST 203503609a9SYuri PankovZone EST5EDT -5:00 US E%sT 204503609a9SYuri PankovZone CST6CDT -6:00 US C%sT 205503609a9SYuri PankovZone MST7MDT -7:00 US M%sT 206503609a9SYuri PankovZone PST8PDT -8:00 US P%sT 207503609a9SYuri Pankov 208503609a9SYuri Pankov# From U. S. Naval Observatory (1989-01-19): 209503609a9SYuri Pankov# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 210503609a9SYuri Pankov# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 211503609a9SYuri Pankov# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 212503609a9SYuri Pankov# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 213503609a9SYuri Pankov# USA MOUNTAIN 7 H BEHIND UTC DENVER 214503609a9SYuri Pankov# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 215503609a9SYuri Pankov# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 216503609a9SYuri Pankov# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 217503609a9SYuri Pankov# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 218503609a9SYuri Pankov# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 219503609a9SYuri Pankov# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 220503609a9SYuri Pankov# USA " 9 H BEHIND UTC APR 3 - OCT 30 221503609a9SYuri Pankov# USA HAWAII 10 H BEHIND UTC 222503609a9SYuri Pankov# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 223503609a9SYuri Pankov 224503609a9SYuri Pankov# From Arthur David Olson (1989-01-21): 225503609a9SYuri Pankov# The above dates are for 1988. 226503609a9SYuri Pankov# Note the "AKST" and "AKDT" abbreviations, the claim that there's 227503609a9SYuri Pankov# no DST in Samoa, and the claim that there is DST in Alaska and the 228503609a9SYuri Pankov# Aleutians. 229503609a9SYuri Pankov 230503609a9SYuri Pankov# From Arthur David Olson (1988-02-13): 231503609a9SYuri Pankov# Legal standard time zone names, from United States Code (1982 Edition and 232503609a9SYuri Pankov# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 233503609a9SYuri Pankov# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 234503609a9SYuri Pankov# took effect), as explained in sections 263 and 261: 235503609a9SYuri Pankov# (none) 236503609a9SYuri Pankov# United States standard eastern time 237503609a9SYuri Pankov# United States standard mountain time 238503609a9SYuri Pankov# United States standard central time 239503609a9SYuri Pankov# United States standard Pacific time 240503609a9SYuri Pankov# (none) 241503609a9SYuri Pankov# United States standard Alaska time 242503609a9SYuri Pankov# (none) 243503609a9SYuri Pankov# Next, names from 1967-04-01 until 1983-11-30 (the date for 244503609a9SYuri Pankov# public law 98-181): 245503609a9SYuri Pankov# Atlantic standard time 246503609a9SYuri Pankov# eastern standard time 247503609a9SYuri Pankov# central standard time 248503609a9SYuri Pankov# mountain standard time 249503609a9SYuri Pankov# Pacific standard time 250503609a9SYuri Pankov# Yukon standard time 251503609a9SYuri Pankov# Alaska-Hawaii standard time 252503609a9SYuri Pankov# Bering standard time 253503609a9SYuri Pankov# And after 1983-11-30: 254503609a9SYuri Pankov# Atlantic standard time 255503609a9SYuri Pankov# eastern standard time 256503609a9SYuri Pankov# central standard time 257503609a9SYuri Pankov# mountain standard time 258503609a9SYuri Pankov# Pacific standard time 259503609a9SYuri Pankov# Alaska standard time 260503609a9SYuri Pankov# Hawaii-Aleutian standard time 261503609a9SYuri Pankov# Samoa standard time 262503609a9SYuri Pankov# The law doesn't give abbreviations. 263503609a9SYuri Pankov# 264dafc4501SDan McDonald# From Paul Eggert (2016-12-19): 265dafc4501SDan McDonald# Here are URLs for the 1918 and 1966 legislation: 266dafc4501SDan McDonald# http://uscode.house.gov/statviewer.htm?volume=40&page=451 267dafc4501SDan McDonald# http://uscode.house.gov/statviewer.htm?volume=80&page=108 268dafc4501SDan McDonald# Although the 1918 names were officially "United States Standard 269dafc4501SDan McDonald# Eastern Time" and similarly for "Central", "Mountain", "Pacific", 270dafc4501SDan McDonald# and "Alaska", in practice "Standard" was placed just before "Time", 271dafc4501SDan McDonald# as codified in 1966. In practice, Alaska time was abbreviated "AST" 272dafc4501SDan McDonald# before 1968. Summarizing the 1967 name changes: 273dafc4501SDan McDonald# 1918 names 1967 names 274dafc4501SDan McDonald# -08 Standard Pacific Time (PST) Pacific standard time (PST) 275dafc4501SDan McDonald# -09 (unofficial) Yukon (YST) Yukon standard time (YST) 276dafc4501SDan McDonald# -10 Standard Alaska Time (AST) Alaska-Hawaii standard time (AHST) 277dafc4501SDan McDonald# -11 (unofficial) Nome (NST) Bering standard time (BST) 278dafc4501SDan McDonald# 279af2e290bSAndy Fiddaman# From Paul Eggert (2023-01-23), from a 2001-01-08 heads-up from Rives McDow: 280af2e290bSAndy Fiddaman# Public law 106-564 (2000-12-23) introduced "Chamorro standard time" 281503609a9SYuri Pankov# for time in Guam and the Northern Marianas. See the file "australasia". 282af2e290bSAndy Fiddaman# Also see 15 U.S.C. §263 <https://www.law.cornell.edu/uscode/text/15/263>. 283503609a9SYuri Pankov# 284503609a9SYuri Pankov# From Paul Eggert (2015-04-17): 285503609a9SYuri Pankov# HST and HDT are standardized abbreviations for Hawaii-Aleutian 286503609a9SYuri Pankov# standard and daylight times. See section 9.47 (p 234) of the 287503609a9SYuri Pankov# U.S. Government Printing Office Style Manual (2008) 288b654b02dSYuri Pankov# https://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf 289503609a9SYuri Pankov 290503609a9SYuri Pankov# From Arthur David Olson, 2005-08-09 291503609a9SYuri Pankov# The following was signed into law on 2005-08-08. 292503609a9SYuri Pankov# 293503609a9SYuri Pankov# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. 294503609a9SYuri Pankov# (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15 295503609a9SYuri Pankov# U.S.C. 260a(a)) is amended-- 296503609a9SYuri Pankov# (1) by striking "first Sunday of April" and inserting "second 297503609a9SYuri Pankov# Sunday of March"; and 298503609a9SYuri Pankov# (2) by striking "last Sunday of October" and inserting "first 299503609a9SYuri Pankov# Sunday of November'. 300503609a9SYuri Pankov# (b) Effective Date.--Subsection (a) shall take effect 1 year after the 301503609a9SYuri Pankov# date of enactment of this Act or March 1, 2007, whichever is later. 302503609a9SYuri Pankov# (c) Report to Congress.--Not later than 9 months after the effective 303503609a9SYuri Pankov# date stated in subsection (b), the Secretary shall report to Congress 304503609a9SYuri Pankov# on the impact of this section on energy consumption in the United 305503609a9SYuri Pankov# States. 306503609a9SYuri Pankov# (d) Right to Revert.--Congress retains the right to revert the 307503609a9SYuri Pankov# Daylight Saving Time back to the 2005 time schedules once the 308503609a9SYuri Pankov# Department study is complete. 309503609a9SYuri Pankov 310503609a9SYuri Pankov# US eastern time, represented by New York 311503609a9SYuri Pankov 312503609a9SYuri Pankov# Connecticut, Delaware, District of Columbia, most of Florida, 313503609a9SYuri Pankov# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky 314503609a9SYuri Pankov# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, 315503609a9SYuri Pankov# New Hampshire, New Jersey, New York, North Carolina, Ohio, 316503609a9SYuri Pankov# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 317503609a9SYuri Pankov# Vermont, Virginia, West Virginia 318503609a9SYuri Pankov 319503609a9SYuri Pankov# From Dave Cantor (2004-11-02): 320503609a9SYuri Pankov# Early this summer I had the occasion to visit the Mount Washington 321503609a9SYuri Pankov# Observatory weather station atop (of course!) Mount Washington [, NH].... 322503609a9SYuri Pankov# One of the staff members said that the station was on Eastern Standard Time 323503609a9SYuri Pankov# and didn't change their clocks for Daylight Saving ... so that their 324503609a9SYuri Pankov# reports will always have times which are 5 hours behind UTC. 325503609a9SYuri Pankov 326503609a9SYuri Pankov# From Paul Eggert (2005-08-26): 327503609a9SYuri Pankov# According to today's Huntsville Times 328503609a9SYuri Pankov# http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1 329503609a9SYuri Pankov# a few towns on Alabama's "eastern border with Georgia, such as Phenix City 330503609a9SYuri Pankov# in Russell County, Lanett in Chambers County and some towns in Lee County, 331503609a9SYuri Pankov# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" 332503609a9SYuri Pankov# Roberts, city administrator in Phenix City. as saying "We are in the Central 333503609a9SYuri Pankov# time zone, but we do go by the Eastern time zone because so many people work 334503609a9SYuri Pankov# in Columbus." 335dafc4501SDan McDonald# 336dafc4501SDan McDonald# From Paul Eggert (2017-02-22): 337dafc4501SDan McDonald# Four cities are involved. The two not mentioned above are Smiths Station 338dafc4501SDan McDonald# and Valley. Barbara Brooks, Valley's assistant treasurer, heard it started 339dafc4501SDan McDonald# because West Point Pepperell textile mills were in Alabama while the 340dafc4501SDan McDonald# corporate office was in Georgia, and residents voted to keep Eastern 341dafc4501SDan McDonald# time even after the mills closed. See: Kazek K. Did you know which 342dafc4501SDan McDonald# Alabama towns are in a different time zone? al.com 2017-02-06. 343dafc4501SDan McDonald# http://www.al.com/living/index.ssf/2017/02/do_you_know_which_alabama_town.html 344503609a9SYuri Pankov 345503609a9SYuri Pankov# From Paul Eggert (2014-09-06): 346503609a9SYuri Pankov# Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208 347503609a9SYuri Pankov# says that New York City Hall time was 3 minutes 58.4 seconds fast of 348427b4c5cSAndy Fiddaman# Eastern time (i.e., -4:56:01.6) just before the 1883 switch. 349503609a9SYuri Pankov 350f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER 351503609a9SYuri PankovRule NYC 1920 only - Mar lastSun 2:00 1:00 D 352503609a9SYuri PankovRule NYC 1920 only - Oct lastSun 2:00 0 S 353503609a9SYuri PankovRule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 354503609a9SYuri PankovRule NYC 1921 1954 - Sep lastSun 2:00 0 S 355503609a9SYuri PankovRule NYC 1955 1966 - Oct lastSun 2:00 0 S 356374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 357427b4c5cSAndy Fiddaman #STDOFF -4:56:01.6 358427b4c5cSAndy FiddamanZone America/New_York -4:56:02 - LMT 1883 Nov 18 17:00u 359503609a9SYuri Pankov -5:00 US E%sT 1920 360503609a9SYuri Pankov -5:00 NYC E%sT 1942 361503609a9SYuri Pankov -5:00 US E%sT 1946 362503609a9SYuri Pankov -5:00 NYC E%sT 1967 363503609a9SYuri Pankov -5:00 US E%sT 364503609a9SYuri Pankov 365503609a9SYuri Pankov# US central time, represented by Chicago 366503609a9SYuri Pankov 367503609a9SYuri Pankov# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 368503609a9SYuri Pankov# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 369503609a9SYuri Pankov# Washington counties), Illinois, western Indiana 370503609a9SYuri Pankov# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 371503609a9SYuri Pankov# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 372503609a9SYuri Pankov# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 373503609a9SYuri Pankov# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 374503609a9SYuri Pankov# western Tennessee, most of Texas, Wisconsin 375503609a9SYuri Pankov 3764b8ee424SYuri Pankov# From Paul Eggert (2018-01-07): 3774b8ee424SYuri Pankov# In 1869 the Chicago Astronomical Society contracted with the city to keep 3784b8ee424SYuri Pankov# time. Though delayed by the Great Fire, by 1880 a wire ran from the 3794b8ee424SYuri Pankov# Dearborn Observatory (on the University of Chicago campus) to City Hall, 3804b8ee424SYuri Pankov# which then sent signals to police and fire stations. However, railroads got 3814b8ee424SYuri Pankov# their time signals from the Allegheny Observatory, the Madison Observatory, 3824b8ee424SYuri Pankov# the Ann Arbor Observatory, etc., so their clocks did not agree with each 3834b8ee424SYuri Pankov# other or with the city's official time. The confusion took some years to 3844b8ee424SYuri Pankov# clear up. See: 3854b8ee424SYuri Pankov# Moser M. How Chicago gave America its time zones. Chicago. 2018-01-04. 3864b8ee424SYuri Pankov# http://www.chicagomag.com/city-life/January-2018/How-Chicago-Gave-America-Its-Time-Zones/ 3874b8ee424SYuri Pankov 388503609a9SYuri Pankov# From Larry M. Smith (2006-04-26) re Wisconsin: 389b654b02dSYuri Pankov# https://docs.legis.wisconsin.gov/statutes/statutes/175.pdf 390503609a9SYuri Pankov# is currently enforced at the 01:00 time of change. Because the local 391503609a9SYuri Pankov# "bar time" in the state corresponds to 02:00, a number of citations 392503609a9SYuri Pankov# are issued for the "sale of class 'B' alcohol after prohibited 393503609a9SYuri Pankov# hours" within the deviated hour of this change every year.... 394503609a9SYuri Pankov# 395503609a9SYuri Pankov# From Douglas R. Bomberg (2007-03-12): 396503609a9SYuri Pankov# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI 397503609a9SYuri Pankov# Statue 175 closer in synch with the US Congress' intent.... 398b654b02dSYuri Pankov# https://docs.legis.wisconsin.gov/2007/related/acts/3 399503609a9SYuri Pankov 400503609a9SYuri Pankov# From an email administrator of the City of Fort Pierre, SD (2015-12-21): 401503609a9SYuri Pankov# Fort Pierre is technically located in the Mountain time zone as is 402503609a9SYuri Pankov# the rest of Stanley County. Most of Stanley County and Fort Pierre 403503609a9SYuri Pankov# uses the Central time zone due to doing most of their business in 404503609a9SYuri Pankov# Pierre so it simplifies schedules. I have lived in Stanley County 405503609a9SYuri Pankov# all my life and it has been that way since I can remember. (43 years!) 406503609a9SYuri Pankov# 407503609a9SYuri Pankov# From Paul Eggert (2015-12-25): 408503609a9SYuri Pankov# Assume this practice predates 1970, so Fort Pierre can use America/Chicago. 409503609a9SYuri Pankov 410374df668SAndy Fiddaman# From Paul Eggert (2015-04-06): 411374df668SAndy Fiddaman# In 1950s Nashville a public clock had dueling faces, one for conservatives 412374df668SAndy Fiddaman# and the other for liberals; the two sides didn't agree about the time of day. 413374df668SAndy Fiddaman# I haven't found a photo of this clock, nor have I tracked down the TIME 414374df668SAndy Fiddaman# magazine report cited below, but here's the story as told by the late 415374df668SAndy Fiddaman# American journalist John Seigenthaler, who was there: 416374df668SAndy Fiddaman# 417374df668SAndy Fiddaman# "The two [newspaper] owners held strongly contrasting political and 418374df668SAndy Fiddaman# ideological views. Evans was a New South liberal, Stahlman an Old South 419374df668SAndy Fiddaman# conservative, and their two papers frequently clashed editorially, often on 420374df668SAndy Fiddaman# the same day.... In the 1950s as the state legislature was grappling with 421374df668SAndy Fiddaman# the question of whether to approve daylight saving time for the entire state, 422374df668SAndy Fiddaman# TIME magazine reported: 423374df668SAndy Fiddaman# 424374df668SAndy Fiddaman# "'The Nashville Banner and The Nashville Tennessean rarely agree on anything 425374df668SAndy Fiddaman# but the time of day - and last week they couldn't agree on that.' 426374df668SAndy Fiddaman# 427374df668SAndy Fiddaman# "It was all too true. The clock on the front of the building had two faces - 428374df668SAndy Fiddaman# The Tennessean side of the building facing west, the other, east. When it 429374df668SAndy Fiddaman# was high noon Banner time, it was 11 a.m. Tennessean time." 430374df668SAndy Fiddaman# 431374df668SAndy Fiddaman# Seigenthaler J. For 100 years, Tennessean had it covered. 432374df668SAndy Fiddaman# The Tennessean 2007-05-11, republished 2015-04-06. 433374df668SAndy Fiddaman# https://www.tennessean.com/story/insider/extras/2015/04/06/archives-seigenthaler-for-100-years-the-tennessean-had-it-covered/25348545/ 434374df668SAndy Fiddaman 435f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER 436503609a9SYuri PankovRule Chicago 1920 only - Jun 13 2:00 1:00 D 437503609a9SYuri PankovRule Chicago 1920 1921 - Oct lastSun 2:00 0 S 438503609a9SYuri PankovRule Chicago 1921 only - Mar lastSun 2:00 1:00 D 439503609a9SYuri PankovRule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 440503609a9SYuri PankovRule Chicago 1922 1954 - Sep lastSun 2:00 0 S 441503609a9SYuri PankovRule Chicago 1955 1966 - Oct lastSun 2:00 0 S 442374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 443f117aa50SRobert MustacchiZone America/Chicago -5:50:36 - LMT 1883 Nov 18 18:00u 444503609a9SYuri Pankov -6:00 US C%sT 1920 445503609a9SYuri Pankov -6:00 Chicago C%sT 1936 Mar 1 2:00 446503609a9SYuri Pankov -5:00 - EST 1936 Nov 15 2:00 447503609a9SYuri Pankov -6:00 Chicago C%sT 1942 448503609a9SYuri Pankov -6:00 US C%sT 1946 449503609a9SYuri Pankov -6:00 Chicago C%sT 1967 450503609a9SYuri Pankov -6:00 US C%sT 451503609a9SYuri Pankov# Oliver County, ND switched from mountain to central time on 1992-10-25. 452f117aa50SRobert MustacchiZone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 19:00u 453503609a9SYuri Pankov -7:00 US M%sT 1992 Oct 25 2:00 454503609a9SYuri Pankov -6:00 US C%sT 455503609a9SYuri Pankov# Morton County, ND, switched from mountain to central time on 456503609a9SYuri Pankov# 2003-10-26, except for the area around Mandan which was already central time. 457503609a9SYuri Pankov# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. 458503609a9SYuri Pankov# Officially this switch also included part of Sioux County, and 459503609a9SYuri Pankov# Jones, Mellette, and Todd Counties in South Dakota; 460503609a9SYuri Pankov# but in practice these other counties were already observing central time. 461503609a9SYuri Pankov# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. 462f117aa50SRobert MustacchiZone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 19:00u 463503609a9SYuri Pankov -7:00 US M%sT 2003 Oct 26 2:00 464503609a9SYuri Pankov -6:00 US C%sT 465503609a9SYuri Pankov 466503609a9SYuri Pankov# From Josh Findley (2011-01-21): 467503609a9SYuri Pankov# ...it appears that Mercer County, North Dakota, changed from the 468503609a9SYuri Pankov# mountain time zone to the central time zone at the last transition from 469503609a9SYuri Pankov# daylight-saving to standard time (on Nov. 7, 2010): 470b654b02dSYuri Pankov# https://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm 471503609a9SYuri Pankov# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html 472503609a9SYuri Pankov 473503609a9SYuri Pankov# From Andy Lipscomb (2011-01-24): 474503609a9SYuri Pankov# ...according to the Census Bureau, the largest city is Beulah (although 475503609a9SYuri Pankov# it's commonly referred to as Beulah-Hazen, with Hazen being the next 476503609a9SYuri Pankov# largest city in Mercer County). Google Maps places Beulah's city hall 4773508b934SYuri Pankov# at 47° 15' 51" N, 101° 46' 40" W, which yields an offset of 6h47'07". 478503609a9SYuri Pankov 479f117aa50SRobert MustacchiZone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 19:00u 480503609a9SYuri Pankov -7:00 US M%sT 2010 Nov 7 2:00 481503609a9SYuri Pankov -6:00 US C%sT 482503609a9SYuri Pankov 483503609a9SYuri Pankov# US mountain time, represented by Denver 484503609a9SYuri Pankov# 485503609a9SYuri Pankov# Colorado, far western Kansas, Montana, western 486503609a9SYuri Pankov# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 487503609a9SYuri Pankov# New Mexico, southwestern North Dakota, 488503609a9SYuri Pankov# western South Dakota, far western Texas (El Paso County, Hudspeth County, 489503609a9SYuri Pankov# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 490503609a9SYuri Pankov# 49105e627dcSAndy Fiddaman# From Paul Eggert (2018-10-25): 49205e627dcSAndy Fiddaman# On 1921-03-04 federal law placed all of Texas into the central time zone. 49305e627dcSAndy Fiddaman# However, El Paso ignored the law for decades and continued to observe 49405e627dcSAndy Fiddaman# mountain time, on the grounds that that's what they had always done 49505e627dcSAndy Fiddaman# and they weren't about to let the federal government tell them what to do. 49605e627dcSAndy Fiddaman# Eventually the federal government gave in and changed the law on 49705e627dcSAndy Fiddaman# 1970-04-10 to match what El Paso was actually doing. Although 49805e627dcSAndy Fiddaman# that's slightly after our 1970 cutoff, there is no need to create a 49905e627dcSAndy Fiddaman# separate zone for El Paso since they were ignoring the law anyway. See: 50005e627dcSAndy Fiddaman# Long T. El Pasoans were time rebels, fought to stay in Mountain zone. 50105e627dcSAndy Fiddaman# El Paso Times. 2018-10-24 06:40 -06. 50205e627dcSAndy Fiddaman# https://www.elpasotimes.com/story/news/local/el-paso/2018/10/24/el-pasoans-were-time-rebels-fought-stay-mountain-zone/1744509002/ 50305e627dcSAndy Fiddaman# 504f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER 505503609a9SYuri PankovRule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 506503609a9SYuri PankovRule Denver 1920 only - Oct lastSun 2:00 0 S 507503609a9SYuri PankovRule Denver 1921 only - May 22 2:00 0 S 508503609a9SYuri PankovRule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 509503609a9SYuri PankovRule Denver 1965 1966 - Oct lastSun 2:00 0 S 510374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 511f117aa50SRobert MustacchiZone America/Denver -6:59:56 - LMT 1883 Nov 18 19:00u 512503609a9SYuri Pankov -7:00 US M%sT 1920 513503609a9SYuri Pankov -7:00 Denver M%sT 1942 514503609a9SYuri Pankov -7:00 US M%sT 1946 515503609a9SYuri Pankov -7:00 Denver M%sT 1967 516503609a9SYuri Pankov -7:00 US M%sT 517503609a9SYuri Pankov 518503609a9SYuri Pankov# US Pacific time, represented by Los Angeles 519503609a9SYuri Pankov# 520503609a9SYuri Pankov# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 521503609a9SYuri Pankov# Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county 522503609a9SYuri Pankov# north of the Salmon River, and the towns of Burgdorf and Warren), 5233508b934SYuri Pankov# Nevada (except West Wendover), Oregon (except the northern ¾ of 524503609a9SYuri Pankov# Malheur county), and Washington 525503609a9SYuri Pankov 526503609a9SYuri Pankov# From Paul Eggert (2016-08-20): 527503609a9SYuri Pankov# In early February 1948, in response to California's electricity shortage, 528503609a9SYuri Pankov# PG&E changed power frequency from 60 to 59.5 Hz during daylight hours, 529503609a9SYuri Pankov# causing electric clocks to lose six minutes per day. (This did not change 530503609a9SYuri Pankov# legal time, and is not part of the data here.) See: 531503609a9SYuri Pankov# Ross SA. An energy crisis from the past: Northern California in 1948. 532503609a9SYuri Pankov# Working Paper No. 8, Institute of Governmental Studies, UC Berkeley, 533b654b02dSYuri Pankov# 1973-11. https://escholarship.org/uc/item/8x22k30c 534503609a9SYuri Pankov# 535503609a9SYuri Pankov# In another measure to save electricity, DST was instituted from 1948-03-14 536503609a9SYuri Pankov# at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move 537503609a9SYuri Pankov# the fallback transition earlier. See pages 3-4 of: 538503609a9SYuri Pankov# http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf 539503609a9SYuri Pankov# 540503609a9SYuri Pankov# In response: 541503609a9SYuri Pankov# 542503609a9SYuri Pankov# Governor Warren received a torrent of objecting mail, and it is not too much 543503609a9SYuri Pankov# to speculate that the objections to Daylight Saving Time were one important 544503609a9SYuri Pankov# factor in the defeat of the Dewey-Warren Presidential ticket in California. 545503609a9SYuri Pankov# -- Ross, p 25 546503609a9SYuri Pankov# 547503609a9SYuri Pankov# On December 8 the governor exercised the option, setting the date to January 1 548503609a9SYuri Pankov# (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01). 549503609a9SYuri Pankov# 550503609a9SYuri Pankov# Despite the controversy, in 1949 California voters approved Proposition 12, 551503609a9SYuri Pankov# which established DST from April's last Sunday at 01:00 until September's 552503609a9SYuri Pankov# last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed 553503609a9SYuri Pankov# the fall-back date to October's last Sunday. See: 554b654b02dSYuri Pankov# https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props 555b654b02dSYuri Pankov# https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props 556503609a9SYuri Pankov# 557f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER 558503609a9SYuri PankovRule CA 1948 only - Mar 14 2:01 1:00 D 559503609a9SYuri PankovRule CA 1949 only - Jan 1 2:00 0 S 560503609a9SYuri PankovRule CA 1950 1966 - Apr lastSun 1:00 1:00 D 561503609a9SYuri PankovRule CA 1950 1961 - Sep lastSun 2:00 0 S 562503609a9SYuri PankovRule CA 1962 1966 - Oct lastSun 2:00 0 S 563374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 564f117aa50SRobert MustacchiZone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 20:00u 565503609a9SYuri Pankov -8:00 US P%sT 1946 566503609a9SYuri Pankov -8:00 CA P%sT 1967 567503609a9SYuri Pankov -8:00 US P%sT 568503609a9SYuri Pankov 569503609a9SYuri Pankov# Alaska 570dafc4501SDan McDonald# AK%sT is the modern abbreviation for -09 per USNO. 571503609a9SYuri Pankov# 572b654b02dSYuri Pankov# From Paul Eggert (2017-06-15): 573503609a9SYuri Pankov# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 574503609a9SYuri Pankov# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 575b654b02dSYuri Pankov# On Friday, 1867-10-18 (Gregorian), at precisely 15:30 local time, the 576b654b02dSYuri Pankov# Russian forts and fleet at Sitka fired salutes to mark the ceremony of 577b654b02dSYuri Pankov# formal transfer. See the Sacramento Daily Union (1867-11-14), p 3, col 2. 578b654b02dSYuri Pankov# https://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SDU18671114.2.12.1 579b654b02dSYuri Pankov# Sitka workers did not change their calendars until Sunday, 1867-10-20, 580b654b02dSYuri Pankov# and so celebrated two Sundays that week. See: Ahllund T (tr Hallamaa P). 581b654b02dSYuri Pankov# From the memoirs of a Finnish workman. Alaska History. 2006 Fall;21(2):1-25. 582b654b02dSYuri Pankov# http://alaskahistoricalsociety.org/wp-content/uploads/2016/12/Ahllund-2006-Memoirs-of-a-Finnish-Workman.pdf 583b654b02dSYuri Pankov# Include only the time zone part of this transition, ignoring the switch 584b654b02dSYuri Pankov# from Julian to Gregorian, since we can't represent the Julian calendar. 585503609a9SYuri Pankov# 586b654b02dSYuri Pankov# As far as we know, of the locations mentioned below only Sitka was 587503609a9SYuri Pankov# permanently inhabited in 1867 by anyone using either calendar. 588b654b02dSYuri Pankov# (Yakutat was colonized by the Russians in 1799, but the settlement was 589b654b02dSYuri Pankov# destroyed in 1805 by a Yakutat-kon war party.) Many of Alaska's inhabitants 590b654b02dSYuri Pankov# were unaware of the US acquisition of Alaska, much less of any calendar or 591b654b02dSYuri Pankov# time change. However, the Russian-influenced part of Alaska did observe 592b654b02dSYuri Pankov# Russian time, and it is more accurate to model this than to ignore it. 593b654b02dSYuri Pankov# The database format requires an exact transition time; use the Russian 594b654b02dSYuri Pankov# salute as a somewhat-arbitrary time for the formal transfer of control for 595b654b02dSYuri Pankov# all of Alaska. Sitka's UTC offset is -9:01:13; adjust its 15:30 to the 596b654b02dSYuri Pankov# local times of other Alaskan locations so that they change simultaneously. 597503609a9SYuri Pankov 598503609a9SYuri Pankov# From Paul Eggert (2014-07-18): 599af2e290bSAndy Fiddaman# One opinion of the early 1980s turmoil in Alaska over time zones and 600503609a9SYuri Pankov# daylight saving time appeared as graffiti on a Juneau airport wall: 601503609a9SYuri Pankov# "Welcome to Juneau. Please turn your watch back to the 19th century." 602503609a9SYuri Pankov# See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. 603503609a9SYuri Pankov# http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html 604503609a9SYuri Pankov# 605503609a9SYuri Pankov# Steve Ferguson (2011-01-31) referred to the following source: 606503609a9SYuri Pankov# Norris F. Keeping time in Alaska: national directives, local response. 607503609a9SYuri Pankov# Alaska History 2001;16(1-2). 608503609a9SYuri Pankov# http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/ 609503609a9SYuri Pankov 610503609a9SYuri Pankov# From Arthur David Olson (2011-02-01): 611503609a9SYuri Pankov# Here's database-relevant material from the 2001 "Alaska History" article: 612503609a9SYuri Pankov# 613503609a9SYuri Pankov# On September 20 [1979]...DOT...officials decreed that on April 27, 614503609a9SYuri Pankov# 1980, Juneau and other nearby communities would move to Yukon Time. 615503609a9SYuri Pankov# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on 616503609a9SYuri Pankov# Pacific Time. 617503609a9SYuri Pankov# 618503609a9SYuri Pankov# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the 619503609a9SYuri Pankov# Department's September 1979 decision. Juneau and other communities in 620503609a9SYuri Pankov# northern Southeast reverted to Pacific Time on October 26. 621503609a9SYuri Pankov# 622503609a9SYuri Pankov# On October 28 [1983]...the Metlakatla Indian Community Council voted 623503609a9SYuri Pankov# unanimously to keep the reservation on Pacific Time. 624503609a9SYuri Pankov# 625503609a9SYuri Pankov# According to DOT official Joanne Petrie, Indian reservations are not 626503609a9SYuri Pankov# bound to follow time zones imposed by neighboring jurisdictions. 627503609a9SYuri Pankov# 628503609a9SYuri Pankov# (The last is consistent with how the database now handles the Navajo 629503609a9SYuri Pankov# Nation.) 630503609a9SYuri Pankov 631503609a9SYuri Pankov# From Arthur David Olson (2011-02-09): 632503609a9SYuri Pankov# I just spoke by phone with a staff member at the Metlakatla Indian 633503609a9SYuri Pankov# Community office (using contact information available at 634503609a9SYuri Pankov# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla 635503609a9SYuri Pankov# It's shortly after 1:00 here on the east coast of the United States; 636503609a9SYuri Pankov# the staffer said it was shortly after 10:00 there. When I asked whether 637503609a9SYuri Pankov# that meant they were on Pacific time, they said no - they were on their 638503609a9SYuri Pankov# own time. I asked about daylight saving; they said it wasn't used. I 639503609a9SYuri Pankov# did not inquire about practices in the past. 640503609a9SYuri Pankov 641503609a9SYuri Pankov# From Arthur David Olson (2011-08-17): 642503609a9SYuri Pankov# For lack of better information, assume that Metlakatla's 643503609a9SYuri Pankov# abandonment of use of daylight saving resulted from the 1983 vote. 644503609a9SYuri Pankov 645503609a9SYuri Pankov# From Steffen Thorsen (2015-11-09): 646503609a9SYuri Pankov# It seems Metlakatla did go off PST on Sunday, November 1, changing 647503609a9SYuri Pankov# their time to AKST and are going to follow Alaska's DST, switching 648503609a9SYuri Pankov# between AKST and AKDT from now on.... 649b654b02dSYuri Pankov# https://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/ 650503609a9SYuri Pankov 651251a62bcSDominik Hassler# From Ryan Stanley (2018-11-06): 652251a62bcSDominik Hassler# The Metlakatla community in Alaska has decided not to change its 653251a62bcSDominik Hassler# clock back an hour starting on November 4th, 2018 (day before yesterday). 654251a62bcSDominik Hassler# They will be gmtoff=-28800 year-round. 655251a62bcSDominik Hassler# https://www.facebook.com/141055983004923/photos/pb.141055983004923.-2207520000.1541465673./569081370202380/ 656251a62bcSDominik Hassler 657251a62bcSDominik Hassler# From Paul Eggert (2018-12-16): 658251a62bcSDominik Hassler# In a 2018-12-11 special election, Metlakatla voted to go back to 659251a62bcSDominik Hassler# Alaska time (including daylight saving time) starting next year. 660251a62bcSDominik Hassler# https://www.krbd.org/2018/12/12/metlakatla-to-follow-alaska-standard-time-allow-liquor-sales/ 661251a62bcSDominik Hassler# 662251a62bcSDominik Hassler# From Ryan Stanley (2019-01-11): 663251a62bcSDominik Hassler# The community will be changing back on the 20th of this month... 664251a62bcSDominik Hassler# From Tim Parenti (2019-01-11): 665251a62bcSDominik Hassler# Per an announcement on the Metlakatla community's official Facebook page, the 666251a62bcSDominik Hassler# "fall back" will be on Sunday 2019-01-20 at 02:00: 667251a62bcSDominik Hassler# https://www.facebook.com/141055983004923/photos/607150969728753/ 668251a62bcSDominik Hassler# So they won't be waiting for Alaska to join them on 2019-03-10, but will 669251a62bcSDominik Hassler# rather change their clocks twice in seven weeks. 670251a62bcSDominik Hassler 671af2e290bSAndy Fiddaman# From Paul Eggert (2023-01-23): 672af2e290bSAndy Fiddaman# America/Adak is for the Aleutian Islands that are part of Alaska 673af2e290bSAndy Fiddaman# and are west of 169.5° W. 674af2e290bSAndy Fiddaman 675374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 676b654b02dSYuri PankovZone America/Juneau 15:02:19 - LMT 1867 Oct 19 15:33:32 677503609a9SYuri Pankov -8:57:41 - LMT 1900 Aug 20 12:00 678503609a9SYuri Pankov -8:00 - PST 1942 679503609a9SYuri Pankov -8:00 US P%sT 1946 680503609a9SYuri Pankov -8:00 - PST 1969 681503609a9SYuri Pankov -8:00 US P%sT 1980 Apr 27 2:00 682503609a9SYuri Pankov -9:00 US Y%sT 1980 Oct 26 2:00 683503609a9SYuri Pankov -8:00 US P%sT 1983 Oct 30 2:00 684503609a9SYuri Pankov -9:00 US Y%sT 1983 Nov 30 685503609a9SYuri Pankov -9:00 US AK%sT 686b654b02dSYuri PankovZone America/Sitka 14:58:47 - LMT 1867 Oct 19 15:30 687503609a9SYuri Pankov -9:01:13 - LMT 1900 Aug 20 12:00 688503609a9SYuri Pankov -8:00 - PST 1942 689503609a9SYuri Pankov -8:00 US P%sT 1946 690503609a9SYuri Pankov -8:00 - PST 1969 691503609a9SYuri Pankov -8:00 US P%sT 1983 Oct 30 2:00 692503609a9SYuri Pankov -9:00 US Y%sT 1983 Nov 30 693503609a9SYuri Pankov -9:00 US AK%sT 694b654b02dSYuri PankovZone America/Metlakatla 15:13:42 - LMT 1867 Oct 19 15:44:55 695503609a9SYuri Pankov -8:46:18 - LMT 1900 Aug 20 12:00 696503609a9SYuri Pankov -8:00 - PST 1942 697503609a9SYuri Pankov -8:00 US P%sT 1946 698503609a9SYuri Pankov -8:00 - PST 1969 699503609a9SYuri Pankov -8:00 US P%sT 1983 Oct 30 2:00 700503609a9SYuri Pankov -8:00 - PST 2015 Nov 1 2:00 701251a62bcSDominik Hassler -9:00 US AK%sT 2018 Nov 4 2:00 702251a62bcSDominik Hassler -8:00 - PST 2019 Jan 20 2:00 703503609a9SYuri Pankov -9:00 US AK%sT 704b654b02dSYuri PankovZone America/Yakutat 14:41:05 - LMT 1867 Oct 19 15:12:18 705503609a9SYuri Pankov -9:18:55 - LMT 1900 Aug 20 12:00 706503609a9SYuri Pankov -9:00 - YST 1942 707503609a9SYuri Pankov -9:00 US Y%sT 1946 708503609a9SYuri Pankov -9:00 - YST 1969 709503609a9SYuri Pankov -9:00 US Y%sT 1983 Nov 30 710503609a9SYuri Pankov -9:00 US AK%sT 711b654b02dSYuri PankovZone America/Anchorage 14:00:24 - LMT 1867 Oct 19 14:31:37 712503609a9SYuri Pankov -9:59:36 - LMT 1900 Aug 20 12:00 713dafc4501SDan McDonald -10:00 - AST 1942 714dafc4501SDan McDonald -10:00 US A%sT 1967 Apr 715503609a9SYuri Pankov -10:00 - AHST 1969 716503609a9SYuri Pankov -10:00 US AH%sT 1983 Oct 30 2:00 717503609a9SYuri Pankov -9:00 US Y%sT 1983 Nov 30 718503609a9SYuri Pankov -9:00 US AK%sT 719b654b02dSYuri PankovZone America/Nome 12:58:22 - LMT 1867 Oct 19 13:29:35 720503609a9SYuri Pankov -11:01:38 - LMT 1900 Aug 20 12:00 721503609a9SYuri Pankov -11:00 - NST 1942 722503609a9SYuri Pankov -11:00 US N%sT 1946 723503609a9SYuri Pankov -11:00 - NST 1967 Apr 724503609a9SYuri Pankov -11:00 - BST 1969 725503609a9SYuri Pankov -11:00 US B%sT 1983 Oct 30 2:00 726503609a9SYuri Pankov -9:00 US Y%sT 1983 Nov 30 727503609a9SYuri Pankov -9:00 US AK%sT 728b654b02dSYuri PankovZone America/Adak 12:13:22 - LMT 1867 Oct 19 12:44:35 729503609a9SYuri Pankov -11:46:38 - LMT 1900 Aug 20 12:00 730503609a9SYuri Pankov -11:00 - NST 1942 731503609a9SYuri Pankov -11:00 US N%sT 1946 732503609a9SYuri Pankov -11:00 - NST 1967 Apr 733503609a9SYuri Pankov -11:00 - BST 1969 734503609a9SYuri Pankov -11:00 US B%sT 1983 Oct 30 2:00 735503609a9SYuri Pankov -10:00 US AH%sT 1983 Nov 30 736503609a9SYuri Pankov -10:00 US H%sT 73706965442SAndy Fiddaman# The following switches don't make our 1970 cutoff. 73806965442SAndy Fiddaman# 73906965442SAndy Fiddaman# Kiska observed Tokyo date and time during Japanese occupation from 74006965442SAndy Fiddaman# 1942-06-06 to 1943-07-29, and similarly for Attu from 1942-06-07 to 74106965442SAndy Fiddaman# 1943-05-29 (all dates American). Both islands are now uninhabited. 742503609a9SYuri Pankov# 743503609a9SYuri Pankov# Shanks writes that part of southwest Alaska (e.g. Aniak) 744503609a9SYuri Pankov# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 745503609a9SYuri Pankov# and another part (e.g. Akiak) made the same switch five weeks later. 746503609a9SYuri Pankov# 747503609a9SYuri Pankov# From David Flater (2004-11-09): 748503609a9SYuri Pankov# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska 749503609a9SYuri Pankov# Historic Preservation Commission, provided this information, which 750503609a9SYuri Pankov# suggests that Unalaska deviated from statutory time from early 1967 751503609a9SYuri Pankov# possibly until 1983: 752503609a9SYuri Pankov# 753503609a9SYuri Pankov# Minutes of the Unalaska City Council Meeting, January 10, 1967: 754503609a9SYuri Pankov# "Except for St. Paul and Akutan, Unalaska is the only important 755503609a9SYuri Pankov# location not on Alaska Standard Time. The following resolution was 756503609a9SYuri Pankov# made by William Robinson and seconded by Henry Swanson: Be it 757503609a9SYuri Pankov# resolved that the City of Unalaska hereby goes to Alaska Standard 758503609a9SYuri Pankov# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, 759503609a9SYuri Pankov# January 14, Alaska Standard Time.) This resolution was passed with 760503609a9SYuri Pankov# three votes for and one against." 761503609a9SYuri Pankov 762503609a9SYuri Pankov# Hawaii 763503609a9SYuri Pankov 764503609a9SYuri Pankov# From Arthur David Olson (2010-12-09): 765503609a9SYuri Pankov# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 766503609a9SYuri Pankov# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, 767503609a9SYuri Pankov# the article is available at 768b654b02dSYuri Pankov# https://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf 769503609a9SYuri Pankov# and indicates that standard time was adopted effective noon, January 770503609a9SYuri Pankov# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight 771503609a9SYuri Pankov# saving for the period between the last Sunday of each April and the 772503609a9SYuri Pankov# last Sunday of each September, but less than a month later repealed the 773503609a9SYuri Pankov# act," (page 220), that year-round daylight saving time was in effect 774503609a9SYuri Pankov# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for 775503609a9SYuri Pankov# when clocks changed) and that clocks were changed by 30 minutes 776503609a9SYuri Pankov# effective the second Sunday of June, 1947 (page 219, with no time of 777503609a9SYuri Pankov# day given for when clocks changed). A footnote for the 1933 changes 778503609a9SYuri Pankov# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) 779503609a9SYuri Pankov# and Act 163 (approved 21 May 1933)." 780503609a9SYuri Pankov 781503609a9SYuri Pankov# From Arthur David Olson (2011-01-19): 782503609a9SYuri Pankov# The following is from "Laws of the Territory of Hawaii Passed by the 783503609a9SYuri Pankov# Seventeenth Legislature: Regular Session 1933," available (as of 784503609a9SYuri Pankov# 2011-01-19) at American University's Pence Law Library. Page 85: "Act 785503609a9SYuri Pankov# 90...At 2 o'clock ante meridian of the last Sunday in April of each 786503609a9SYuri Pankov# year, the standard time of this Territory shall be advanced one 787503609a9SYuri Pankov# hour...This Act shall take effect upon its approval. Approved this 26th 788503609a9SYuri Pankov# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of 789503609a9SYuri Pankov# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is 790503609a9SYuri Pankov# hereby repealed...This Act shall take effect upon its approval, upon 791503609a9SYuri Pankov# which date the standard time of this Territory shall be restored to 792503609a9SYuri Pankov# that existing immediately prior to the taking effect of said Act 90. 793503609a9SYuri Pankov# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor 794503609a9SYuri Pankov# of the Territory of Hawaii." 795503609a9SYuri Pankov# 796503609a9SYuri Pankov# Note that 1933-05-21 was a Sunday. 797503609a9SYuri Pankov# We're left to guess the time of day when Act 163 was approved; guess noon. 798503609a9SYuri Pankov 799374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 800503609a9SYuri PankovZone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 801503609a9SYuri Pankov -10:30 - HST 1933 Apr 30 2:00 802503609a9SYuri Pankov -10:30 1:00 HDT 1933 May 21 12:00 80305e627dcSAndy Fiddaman -10:30 US H%sT 1947 Jun 8 2:00 804503609a9SYuri Pankov -10:00 - HST 805503609a9SYuri Pankov 806503609a9SYuri Pankov# Now we turn to US areas that have diverged from the consensus since 1970. 807503609a9SYuri Pankov 808503609a9SYuri Pankov# Arizona mostly uses MST. 809503609a9SYuri Pankov 810503609a9SYuri Pankov# From Paul Eggert (2002-10-20): 811503609a9SYuri Pankov# 812503609a9SYuri Pankov# The information in the rest of this paragraph is derived from the 813503609a9SYuri Pankov# Daylight Saving Time web page 814503609a9SYuri Pankov# <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23) 815503609a9SYuri Pankov# maintained by the Arizona State Library, Archives and Public Records. 816503609a9SYuri Pankov# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 817503609a9SYuri Pankov# time, but by federal law railroads, airlines, bus lines, military 818503609a9SYuri Pankov# personnel, and some engaged in interstate commerce continued to 819503609a9SYuri Pankov# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 820503609a9SYuri Pankov# Gazette says that was the date the law changed, and that 04-01 was 821503609a9SYuri Pankov# the date the state's clocks would change. In 1945 the State of 822503609a9SYuri Pankov# Arizona used standard time all year, again with exceptions only as 823503609a9SYuri Pankov# mandated by federal law. Arizona observed DST in 1967, but Arizona 824503609a9SYuri Pankov# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 825503609a9SYuri Pankov# 826503609a9SYuri Pankov# Shanks says the 1944 experiment came to an end on 1944-03-17. 827503609a9SYuri Pankov# Go with the Arizona State Library instead. 828503609a9SYuri Pankov 829374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 830f117aa50SRobert MustacchiZone America/Phoenix -7:28:18 - LMT 1883 Nov 18 19:00u 831503609a9SYuri Pankov -7:00 US M%sT 1944 Jan 1 0:01 832503609a9SYuri Pankov -7:00 - MST 1944 Apr 1 0:01 833503609a9SYuri Pankov -7:00 US M%sT 1944 Oct 1 0:01 834503609a9SYuri Pankov -7:00 - MST 1967 835503609a9SYuri Pankov -7:00 US M%sT 1968 Mar 21 836503609a9SYuri Pankov -7:00 - MST 83706965442SAndy Fiddaman 838503609a9SYuri Pankov# From Arthur David Olson (1988-02-13): 839503609a9SYuri Pankov# A writer from the Inter Tribal Council of Arizona, Inc., 840503609a9SYuri Pankov# notes in private correspondence dated 1987-12-28 that "Presently, only the 841503609a9SYuri Pankov# Navajo Nation participates in the Daylight Saving Time policy, due to its 842503609a9SYuri Pankov# large size and location in three states." (The "only" means that other 843503609a9SYuri Pankov# tribal nations don't use DST.) 844503609a9SYuri Pankov# 845503609a9SYuri Pankov# From Paul Eggert (2013-08-26): 846503609a9SYuri Pankov# See America/Denver for a zone appropriate for the Navajo Nation. 847503609a9SYuri Pankov 848503609a9SYuri Pankov# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 849503609a9SYuri Pankov# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 850503609a9SYuri Pankov# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 851503609a9SYuri Pankov# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 852503609a9SYuri Pankov# Teton, Twin Falls, Valley, Washington counties, and the southern 853503609a9SYuri Pankov# quarter of Idaho county) and eastern Oregon (most of Malheur County) 854503609a9SYuri Pankov# switched four weeks late in 1974. 855503609a9SYuri Pankov# 856374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 857f117aa50SRobert MustacchiZone America/Boise -7:44:49 - LMT 1883 Nov 18 20:00u 858503609a9SYuri Pankov -8:00 US P%sT 1923 May 13 2:00 859503609a9SYuri Pankov -7:00 US M%sT 1974 860503609a9SYuri Pankov -7:00 - MST 1974 Feb 3 2:00 861503609a9SYuri Pankov -7:00 US M%sT 862503609a9SYuri Pankov 863503609a9SYuri Pankov# Indiana 864503609a9SYuri Pankov# 865503609a9SYuri Pankov# For a map of Indiana's time zone regions, see: 866b654b02dSYuri Pankov# https://en.wikipedia.org/wiki/Time_in_Indiana 867503609a9SYuri Pankov# 868251a62bcSDominik Hassler# From Paul Eggert (2018-11-30): 869251a62bcSDominik Hassler# A brief but entertaining history of time in Indiana describes a 1949 debate 870251a62bcSDominik Hassler# in the Indiana House where city legislators (who favored "fast time") 871251a62bcSDominik Hassler# tussled with farm legislators (who didn't) over a bill to outlaw DST: 872251a62bcSDominik Hassler# "Lacking enough votes, the city faction tries to filibuster until time runs 873251a62bcSDominik Hassler# out on the session at midnight, but rural champion Rep. Herbert Copeland, 874251a62bcSDominik Hassler# R-Madison, leans over the gallery railing and forces the official clock 875251a62bcSDominik Hassler# back to 9 p.m., breaking it in the process. The clock sticks on 9 as the 876251a62bcSDominik Hassler# debate rages on into the night. The filibuster finally dies out and the 877251a62bcSDominik Hassler# bill passes, while outside the chamber, clocks read 3:30 a.m. In the end, 878251a62bcSDominik Hassler# it doesn't matter which side won. The law has no enforcement powers and 879251a62bcSDominik Hassler# is simply ignored by fast-time communities." 880251a62bcSDominik Hassler# How Indiana went from 'God's time' to split zones and daylight-saving. 881251a62bcSDominik Hassler# Indianapolis Star. 2018-11-27 14:58 -05. 882251a62bcSDominik Hassler# https://www.indystar.com/story/news/politics/2018/11/27/indianapolis-indiana-time-zone-history-central-eastern-daylight-savings-time/2126300002/ 883251a62bcSDominik Hassler# 884503609a9SYuri Pankov# From Paul Eggert (2007-08-17): 885503609a9SYuri Pankov# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, 886503609a9SYuri Pankov# with the following exceptions: 887503609a9SYuri Pankov# 888503609a9SYuri Pankov# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 889503609a9SYuri Pankov# Vanderburgh, and Warrick counties have been like America/Chicago. 890503609a9SYuri Pankov# 891503609a9SYuri Pankov# - Dearborn and Ohio counties have been like America/New_York. 892503609a9SYuri Pankov# 893503609a9SYuri Pankov# - Clark, Floyd, and Harrison counties have been like 894503609a9SYuri Pankov# America/Kentucky/Louisville. 895503609a9SYuri Pankov# 896503609a9SYuri Pankov# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, 897503609a9SYuri Pankov# and Switzerland counties have their own time zone histories as noted below. 898503609a9SYuri Pankov# 899503609a9SYuri Pankov# Shanks partitioned Indiana into 345 regions, each with its own time history, 900503609a9SYuri Pankov# and wrote "Even newspaper reports present contradictory information." 901503609a9SYuri Pankov# Those Hoosiers! Such a flighty and changeable people! 902503609a9SYuri Pankov# Fortunately, most of the complexity occurred before our cutoff date of 1970. 903503609a9SYuri Pankov# 904503609a9SYuri Pankov# Other than Indianapolis, the Indiana place names are so nondescript 905503609a9SYuri Pankov# that they would be ambiguous if we left them at the 'America' level. 906503609a9SYuri Pankov# So we reluctantly put them all in a subdirectory 'America/Indiana'. 907503609a9SYuri Pankov 908503609a9SYuri Pankov# From Paul Eggert (2014-06-26): 909503609a9SYuri Pankov# https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana 910503609a9SYuri Pankov# says "DOT is relocating the time zone boundary in Indiana to move Starke, 911503609a9SYuri Pankov# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the 912503609a9SYuri Pankov# Eastern Time Zone to the Central Time Zone.... The effective date of 913503609a9SYuri Pankov# this rule is 2 a.m. EST Sunday, April 2, 2006, which is the 914503609a9SYuri Pankov# changeover date from standard time to Daylight Saving Time." 915503609a9SYuri Pankov# Strictly speaking, this meant the affected counties changed their 916503609a9SYuri Pankov# clocks twice that night, but this obviously was in error. The intent 917503609a9SYuri Pankov# was that 01:59:59 EST be followed by 02:00:00 CDT. 918503609a9SYuri Pankov 919503609a9SYuri Pankov# From Gwillim Law (2007-02-10): 920503609a9SYuri Pankov# The Associated Press has been reporting that Pulaski County, Indiana is 921503609a9SYuri Pankov# going to switch from Central to Eastern Time on March 11, 2007.... 922503609a9SYuri Pankov# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL 923503609a9SYuri Pankov 924f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER 925503609a9SYuri PankovRule Indianapolis 1941 only - Jun 22 2:00 1:00 D 926503609a9SYuri PankovRule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 927503609a9SYuri PankovRule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 928374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 929f117aa50SRobert MustacchiZone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 18:00u 930503609a9SYuri Pankov -6:00 US C%sT 1920 931503609a9SYuri Pankov -6:00 Indianapolis C%sT 1942 932503609a9SYuri Pankov -6:00 US C%sT 1946 933503609a9SYuri Pankov -6:00 Indianapolis C%sT 1955 Apr 24 2:00 934503609a9SYuri Pankov -5:00 - EST 1957 Sep 29 2:00 935503609a9SYuri Pankov -6:00 - CST 1958 Apr 27 2:00 936503609a9SYuri Pankov -5:00 - EST 1969 937503609a9SYuri Pankov -5:00 US E%sT 1971 938503609a9SYuri Pankov -5:00 - EST 2006 939503609a9SYuri Pankov -5:00 US E%sT 940503609a9SYuri Pankov# 941503609a9SYuri Pankov# Eastern Crawford County, Indiana, left its clocks alone in 1974, 942503609a9SYuri Pankov# as well as from 1976 through 2005. 943f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER 944503609a9SYuri PankovRule Marengo 1951 only - Apr lastSun 2:00 1:00 D 945503609a9SYuri PankovRule Marengo 1951 only - Sep lastSun 2:00 0 S 946503609a9SYuri PankovRule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 947503609a9SYuri PankovRule Marengo 1954 1960 - Sep lastSun 2:00 0 S 948374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 949f117aa50SRobert MustacchiZone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 18:00u 950503609a9SYuri Pankov -6:00 US C%sT 1951 951503609a9SYuri Pankov -6:00 Marengo C%sT 1961 Apr 30 2:00 952503609a9SYuri Pankov -5:00 - EST 1969 953503609a9SYuri Pankov -5:00 US E%sT 1974 Jan 6 2:00 954503609a9SYuri Pankov -6:00 1:00 CDT 1974 Oct 27 2:00 955503609a9SYuri Pankov -5:00 US E%sT 1976 956503609a9SYuri Pankov -5:00 - EST 2006 957503609a9SYuri Pankov -5:00 US E%sT 958503609a9SYuri Pankov# 959503609a9SYuri Pankov# Daviess, Dubois, Knox, and Martin Counties, Indiana, 960503609a9SYuri Pankov# switched from eastern to central time in April 2006, then switched back 961503609a9SYuri Pankov# in November 2007. 962f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER 963503609a9SYuri PankovRule Vincennes 1946 only - Apr lastSun 2:00 1:00 D 964503609a9SYuri PankovRule Vincennes 1946 only - Sep lastSun 2:00 0 S 965503609a9SYuri PankovRule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D 966503609a9SYuri PankovRule Vincennes 1953 1959 - Sep lastSun 2:00 0 S 967503609a9SYuri PankovRule Vincennes 1955 only - May 1 0:00 1:00 D 968503609a9SYuri PankovRule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D 969503609a9SYuri PankovRule Vincennes 1960 only - Oct lastSun 2:00 0 S 970503609a9SYuri PankovRule Vincennes 1961 only - Sep lastSun 2:00 0 S 971503609a9SYuri PankovRule Vincennes 1962 1963 - Oct lastSun 2:00 0 S 972374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 973f117aa50SRobert MustacchiZone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 18:00u 974503609a9SYuri Pankov -6:00 US C%sT 1946 975503609a9SYuri Pankov -6:00 Vincennes C%sT 1964 Apr 26 2:00 976503609a9SYuri Pankov -5:00 - EST 1969 977503609a9SYuri Pankov -5:00 US E%sT 1971 978503609a9SYuri Pankov -5:00 - EST 2006 Apr 2 2:00 979503609a9SYuri Pankov -6:00 US C%sT 2007 Nov 4 2:00 980503609a9SYuri Pankov -5:00 US E%sT 981503609a9SYuri Pankov# 982503609a9SYuri Pankov# Perry County, Indiana, switched from eastern to central time in April 2006. 98306965442SAndy Fiddaman# From Alois Treindl (2019-07-09): 984374df668SAndy Fiddaman# The Indianapolis News, Friday 27 October 1967 states that Perry County 985374df668SAndy Fiddaman# returned to CST. It went again to EST on 27 April 1969, as documented by the 986374df668SAndy Fiddaman# Indianapolis star of Saturday 26 April. 987f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER 988503609a9SYuri PankovRule Perry 1955 only - May 1 0:00 1:00 D 989374df668SAndy FiddamanRule Perry 1955 1960 - Sep lastSun 2:00 0 S 990503609a9SYuri PankovRule Perry 1956 1963 - Apr lastSun 2:00 1:00 D 991374df668SAndy FiddamanRule Perry 1961 1963 - Oct lastSun 2:00 0 S 992374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 993f117aa50SRobert MustacchiZone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 18:00u 994503609a9SYuri Pankov -6:00 US C%sT 1946 995503609a9SYuri Pankov -6:00 Perry C%sT 1964 Apr 26 2:00 996374df668SAndy Fiddaman -5:00 - EST 1967 Oct 29 2:00 997374df668SAndy Fiddaman -6:00 US C%sT 1969 Apr 27 2:00 998503609a9SYuri Pankov -5:00 US E%sT 1971 999503609a9SYuri Pankov -5:00 - EST 2006 Apr 2 2:00 1000503609a9SYuri Pankov -6:00 US C%sT 1001503609a9SYuri Pankov# 1002503609a9SYuri Pankov# Pike County, Indiana moved from central to eastern time in 1977, 1003503609a9SYuri Pankov# then switched back in 2006, then switched back again in 2007. 1004f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER 1005503609a9SYuri PankovRule Pike 1955 only - May 1 0:00 1:00 D 1006503609a9SYuri PankovRule Pike 1955 1960 - Sep lastSun 2:00 0 S 1007503609a9SYuri PankovRule Pike 1956 1964 - Apr lastSun 2:00 1:00 D 1008503609a9SYuri PankovRule Pike 1961 1964 - Oct lastSun 2:00 0 S 1009374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1010f117aa50SRobert MustacchiZone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 18:00u 1011503609a9SYuri Pankov -6:00 US C%sT 1955 1012503609a9SYuri Pankov -6:00 Pike C%sT 1965 Apr 25 2:00 1013503609a9SYuri Pankov -5:00 - EST 1966 Oct 30 2:00 1014503609a9SYuri Pankov -6:00 US C%sT 1977 Oct 30 2:00 1015503609a9SYuri Pankov -5:00 - EST 2006 Apr 2 2:00 1016503609a9SYuri Pankov -6:00 US C%sT 2007 Nov 4 2:00 1017503609a9SYuri Pankov -5:00 US E%sT 1018503609a9SYuri Pankov# 1019503609a9SYuri Pankov# Starke County, Indiana moved from central to eastern time in 1991, 1020503609a9SYuri Pankov# then switched back in 2006. 1021503609a9SYuri Pankov# From Arthur David Olson (1991-10-28): 1022503609a9SYuri Pankov# An article on page A3 of the Sunday, 1991-10-27 Washington Post 1023503609a9SYuri Pankov# notes that Starke County switched from Central time to Eastern time as of 1024503609a9SYuri Pankov# 1991-10-27. 1025f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER 1026503609a9SYuri PankovRule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 1027503609a9SYuri PankovRule Starke 1947 1954 - Sep lastSun 2:00 0 S 1028503609a9SYuri PankovRule Starke 1955 1956 - Oct lastSun 2:00 0 S 1029503609a9SYuri PankovRule Starke 1957 1958 - Sep lastSun 2:00 0 S 1030503609a9SYuri PankovRule Starke 1959 1961 - Oct lastSun 2:00 0 S 1031374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1032f117aa50SRobert MustacchiZone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 18:00u 1033503609a9SYuri Pankov -6:00 US C%sT 1947 1034503609a9SYuri Pankov -6:00 Starke C%sT 1962 Apr 29 2:00 1035503609a9SYuri Pankov -5:00 - EST 1963 Oct 27 2:00 1036503609a9SYuri Pankov -6:00 US C%sT 1991 Oct 27 2:00 1037503609a9SYuri Pankov -5:00 - EST 2006 Apr 2 2:00 1038503609a9SYuri Pankov -6:00 US C%sT 1039503609a9SYuri Pankov# 1040503609a9SYuri Pankov# Pulaski County, Indiana, switched from eastern to central time in 1041503609a9SYuri Pankov# April 2006 and then switched back in March 2007. 1042f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER 1043503609a9SYuri PankovRule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D 1044503609a9SYuri PankovRule Pulaski 1946 1954 - Sep lastSun 2:00 0 S 1045503609a9SYuri PankovRule Pulaski 1955 1956 - Oct lastSun 2:00 0 S 1046503609a9SYuri PankovRule Pulaski 1957 1960 - Sep lastSun 2:00 0 S 1047374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1048f117aa50SRobert MustacchiZone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 18:00u 1049503609a9SYuri Pankov -6:00 US C%sT 1946 1050503609a9SYuri Pankov -6:00 Pulaski C%sT 1961 Apr 30 2:00 1051503609a9SYuri Pankov -5:00 - EST 1969 1052503609a9SYuri Pankov -5:00 US E%sT 1971 1053503609a9SYuri Pankov -5:00 - EST 2006 Apr 2 2:00 1054503609a9SYuri Pankov -6:00 US C%sT 2007 Mar 11 2:00 1055503609a9SYuri Pankov -5:00 US E%sT 1056503609a9SYuri Pankov# 1057503609a9SYuri Pankov# Switzerland County, Indiana, did not observe DST from 1973 through 2005. 1058374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1059f117aa50SRobert MustacchiZone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 18:00u 1060503609a9SYuri Pankov -6:00 US C%sT 1954 Apr 25 2:00 1061503609a9SYuri Pankov -5:00 - EST 1969 1062503609a9SYuri Pankov -5:00 US E%sT 1973 1063503609a9SYuri Pankov -5:00 - EST 2006 1064503609a9SYuri Pankov -5:00 US E%sT 1065503609a9SYuri Pankov 10663508b934SYuri Pankov# From Paul Eggert (2018-03-20): 10673508b934SYuri Pankov# The Louisville & Nashville Railroad's 1883-11-18 change occurred at 10683508b934SYuri Pankov# 10:00 old local time; train were supposed to come to a standstill 10693508b934SYuri Pankov# for precisely 18 minutes. See Bartky Fig. 1 (page 50). It is not 10703508b934SYuri Pankov# clear how this matched civil time in Louisville, so for now continue 10713508b934SYuri Pankov# to assume Louisville switched at noon new local time, like New York. 10723508b934SYuri Pankov# 1073374df668SAndy Fiddaman# From Michael Deckers (2019-08-06): 1074374df668SAndy Fiddaman# From the contemporary source given by Alois Treindl, 1075374df668SAndy Fiddaman# the switch in Louisville on 1946-04-28 was on 00:01 1076374df668SAndy Fiddaman# From Paul Eggert (2019-08-26): 1077374df668SAndy Fiddaman# That source was the Louisville Courier-Journal, 1946-04-27, p 4. 1078374df668SAndy Fiddaman# Shanks gives 02:00 for all 20th-century transition times in Louisville. 1079374df668SAndy Fiddaman# Evidently this is wrong for spring 1946. Although also likely wrong 1080374df668SAndy Fiddaman# for other dates, we have no data. 1081374df668SAndy Fiddaman# 1082503609a9SYuri Pankov# Part of Kentucky left its clocks alone in 1974. 1083503609a9SYuri Pankov# This also includes Clark, Floyd, and Harrison counties in Indiana. 1084f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER 1085503609a9SYuri PankovRule Louisville 1921 only - May 1 2:00 1:00 D 1086503609a9SYuri PankovRule Louisville 1921 only - Sep 1 2:00 0 S 1087374df668SAndy FiddamanRule Louisville 1941 only - Apr lastSun 2:00 1:00 D 1088503609a9SYuri PankovRule Louisville 1941 only - Sep lastSun 2:00 0 S 1089374df668SAndy FiddamanRule Louisville 1946 only - Apr lastSun 0:01 1:00 D 1090503609a9SYuri PankovRule Louisville 1946 only - Jun 2 2:00 0 S 1091374df668SAndy FiddamanRule Louisville 1950 1961 - Apr lastSun 2:00 1:00 D 1092503609a9SYuri PankovRule Louisville 1950 1955 - Sep lastSun 2:00 0 S 1093374df668SAndy FiddamanRule Louisville 1956 1961 - Oct lastSun 2:00 0 S 1094374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1095f117aa50SRobert MustacchiZone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 18:00u 1096503609a9SYuri Pankov -6:00 US C%sT 1921 1097503609a9SYuri Pankov -6:00 Louisville C%sT 1942 1098503609a9SYuri Pankov -6:00 US C%sT 1946 1099503609a9SYuri Pankov -6:00 Louisville C%sT 1961 Jul 23 2:00 1100503609a9SYuri Pankov -5:00 - EST 1968 1101503609a9SYuri Pankov -5:00 US E%sT 1974 Jan 6 2:00 1102503609a9SYuri Pankov -6:00 1:00 CDT 1974 Oct 27 2:00 1103503609a9SYuri Pankov -5:00 US E%sT 1104503609a9SYuri Pankov# 1105503609a9SYuri Pankov# Wayne County, Kentucky 1106503609a9SYuri Pankov# 1107503609a9SYuri Pankov# From Lake Cumberland LIFE 1108503609a9SYuri Pankov# http://www.lake-cumberland.com/life/archive/news990129time.shtml 1109503609a9SYuri Pankov# (1999-01-29) via WKYM-101.7: 1110503609a9SYuri Pankov# Clinton County has joined Wayne County in asking the DoT to change from 1111503609a9SYuri Pankov# the Central to the Eastern time zone.... The Wayne County government made 1112503609a9SYuri Pankov# the same request in December. And while Russell County officials have not 1113503609a9SYuri Pankov# taken action, the majority of respondents to a poll conducted there in 1114503609a9SYuri Pankov# August indicated they would like to change to "fast time" also. 1115503609a9SYuri Pankov# The three Lake Cumberland counties are the farthest east of any U.S. 1116503609a9SYuri Pankov# location in the Central time zone. 1117503609a9SYuri Pankov# 1118503609a9SYuri Pankov# From Rich Wales (2000-08-29): 1119503609a9SYuri Pankov# After prolonged debate, and despite continuing deep differences of opinion, 1120503609a9SYuri Pankov# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 1121503609a9SYuri Pankov# (-0500) time. They won't "fall back" this year. See Sara Shipley, 1122503609a9SYuri Pankov# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 1123503609a9SYuri Pankov# 1124503609a9SYuri Pankov# From Paul Eggert (2001-07-16): 1125503609a9SYuri Pankov# The final rule was published in the 1126503609a9SYuri Pankov# Federal Register 65, 160 (2000-08-17), pp 50154-50158. 1127b654b02dSYuri Pankov# https://www.gpo.gov/fdsys/pkg/FR-2000-08-17/html/00-20854.htm 1128503609a9SYuri Pankov# 1129f117aa50SRobert MustacchiZone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 18:00u 1130503609a9SYuri Pankov -6:00 US C%sT 1946 1131503609a9SYuri Pankov -6:00 - CST 1968 1132503609a9SYuri Pankov -6:00 US C%sT 2000 Oct 29 2:00 1133503609a9SYuri Pankov -5:00 US E%sT 1134503609a9SYuri Pankov 1135503609a9SYuri Pankov 1136503609a9SYuri Pankov# From Rives McDow (2000-08-30): 1137503609a9SYuri Pankov# Here ... are all the changes in the US since 1985. 1138503609a9SYuri Pankov# Kearny County, KS (put all of county on central; 1139503609a9SYuri Pankov# previously split between MST and CST) ... 1990-10 1140503609a9SYuri Pankov# Starke County, IN (from CST to EST) ... 1991-10 1141503609a9SYuri Pankov# Oliver County, ND (from MST to CST) ... 1992-10 1142503609a9SYuri Pankov# West Wendover, NV (from PST TO MST) ... 1999-10 1143503609a9SYuri Pankov# Wayne County, KY (from CST to EST) ... 2000-10 1144503609a9SYuri Pankov# 1145503609a9SYuri Pankov# From Paul Eggert (2001-07-17): 1146503609a9SYuri Pankov# We don't know where the line used to be within Kearny County, KS, 1147503609a9SYuri Pankov# so omit that change for now. 1148503609a9SYuri Pankov# See America/Indiana/Knox for the Starke County, IN change. 1149503609a9SYuri Pankov# See America/North_Dakota/Center for the Oliver County, ND change. 1150503609a9SYuri Pankov# West Wendover, NV officially switched from Pacific to mountain time on 1151503609a9SYuri Pankov# 1999-10-31. See the 1152503609a9SYuri Pankov# Federal Register 64, 203 (1999-10-21), pp 56705-56707. 1153b654b02dSYuri Pankov# https://www.gpo.gov/fdsys/pkg/FR-1999-10-21/html/99-27240.htm 1154503609a9SYuri Pankov# However, the Federal Register says that West Wendover already operated 1155503609a9SYuri Pankov# on mountain time, and the rule merely made this official; 1156503609a9SYuri Pankov# hence a separate tz entry is not needed. 1157503609a9SYuri Pankov 1158503609a9SYuri Pankov# Michigan 1159503609a9SYuri Pankov# 1160503609a9SYuri Pankov# From Bob Devine (1988-01-28): 1161503609a9SYuri Pankov# Michigan didn't observe DST from 1968 to 1973. 1162503609a9SYuri Pankov# 1163503609a9SYuri Pankov# From Paul Eggert (1999-03-31): 1164503609a9SYuri Pankov# Shanks writes that Michigan started using standard time on 1885-09-18, 1165503609a9SYuri Pankov# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 1166503609a9SYuri Pankov# that Detroit kept 1167503609a9SYuri Pankov# 1168503609a9SYuri Pankov# local time until 1900 when the City Council decreed that clocks should 1169503609a9SYuri Pankov# be put back twenty-eight minutes to Central Standard Time. Half the 1170503609a9SYuri Pankov# city obeyed, half refused. After considerable debate, the decision 1171503609a9SYuri Pankov# was rescinded and the city reverted to Sun time. A derisive offer to 1172503609a9SYuri Pankov# erect a sundial in front of the city hall was referred to the 1173503609a9SYuri Pankov# Committee on Sewers. Then, in 1905, Central time was adopted 1174503609a9SYuri Pankov# by city vote. 1175503609a9SYuri Pankov# 1176503609a9SYuri Pankov# This story is too entertaining to be false, so go with Howse over Shanks. 1177503609a9SYuri Pankov# 1178503609a9SYuri Pankov# From Paul Eggert (2001-03-06): 1179503609a9SYuri Pankov# Garland (1927) writes "Cleveland and Detroit advanced their clocks 1180503609a9SYuri Pankov# one hour in 1914." This change is not in Shanks. We have no more 1181503609a9SYuri Pankov# info, so omit this for now. 1182503609a9SYuri Pankov# 1183374df668SAndy Fiddaman# From Paul Eggert (2019-07-06): 1184374df668SAndy Fiddaman# Due to a complicated set of legal maneuvers, in 1967 Michigan did 1185374df668SAndy Fiddaman# not start daylight saving time when the rest of the US did. 1186374df668SAndy Fiddaman# Instead, it began DST on Jun 14 at 00:01. This was big news: 1187374df668SAndy Fiddaman# the Detroit Free Press reported it at the top of Page 1 on 1188374df668SAndy Fiddaman# 1967-06-14, in an article "State Adjusting to Switch to Fast Time" 1189374df668SAndy Fiddaman# by Gary Blonston, above an article about Thurgood Marshall's 1190374df668SAndy Fiddaman# confirmation to the US Supreme Court. Although Shanks says Detroit 1191374df668SAndy Fiddaman# observed DST until 1967-10-29 00:01, that time of day seems to be 1192374df668SAndy Fiddaman# incorrect, as the Free Press later said DST ended in Michigan at the 1193374df668SAndy Fiddaman# same time as the rest of the US. Also, although Shanks reports no DST in 1194374df668SAndy Fiddaman# Detroit in 1968, it did observe DST that year; in the November 1968 1195374df668SAndy Fiddaman# election Michigan voters narrowly repealed DST, effective 1969. 1196b654b02dSYuri Pankov# 1197503609a9SYuri Pankov# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 1198f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER 1199503609a9SYuri PankovRule Detroit 1948 only - Apr lastSun 2:00 1:00 D 1200503609a9SYuri PankovRule Detroit 1948 only - Sep lastSun 2:00 0 S 1201374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1202503609a9SYuri PankovZone America/Detroit -5:32:11 - LMT 1905 1203503609a9SYuri Pankov -6:00 - CST 1915 May 15 2:00 1204503609a9SYuri Pankov -5:00 - EST 1942 1205503609a9SYuri Pankov -5:00 US E%sT 1946 1206374df668SAndy Fiddaman -5:00 Detroit E%sT 1967 Jun 14 0:01 1207374df668SAndy Fiddaman -5:00 US E%sT 1969 1208374df668SAndy Fiddaman -5:00 - EST 1973 1209503609a9SYuri Pankov -5:00 US E%sT 1975 1210503609a9SYuri Pankov -5:00 - EST 1975 Apr 27 2:00 1211503609a9SYuri Pankov -5:00 US E%sT 1212503609a9SYuri Pankov# 1213503609a9SYuri Pankov# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, 1214503609a9SYuri Pankov# switched from EST to CST/CDT in 1973. 1215f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER 1216503609a9SYuri PankovRule Menominee 1946 only - Apr lastSun 2:00 1:00 D 1217503609a9SYuri PankovRule Menominee 1946 only - Sep lastSun 2:00 0 S 1218503609a9SYuri PankovRule Menominee 1966 only - Apr lastSun 2:00 1:00 D 1219503609a9SYuri PankovRule Menominee 1966 only - Oct lastSun 2:00 0 S 1220374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1221503609a9SYuri PankovZone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 1222503609a9SYuri Pankov -6:00 US C%sT 1946 1223503609a9SYuri Pankov -6:00 Menominee C%sT 1969 Apr 27 2:00 1224503609a9SYuri Pankov -5:00 - EST 1973 Apr 29 2:00 1225503609a9SYuri Pankov -6:00 US C%sT 1226503609a9SYuri Pankov 1227503609a9SYuri Pankov# Navassa 1228503609a9SYuri Pankov# administered by the US Fish and Wildlife Service 1229503609a9SYuri Pankov# claimed by US under the provisions of the 1856 Guano Islands Act 1230503609a9SYuri Pankov# also claimed by Haiti 1231503609a9SYuri Pankov# occupied 1857/1900 by the Navassa Phosphate Co 1232503609a9SYuri Pankov# US lighthouse 1917/1996-09 1233503609a9SYuri Pankov# currently uninhabited 1234503609a9SYuri Pankov# see Mark Fineman, "An Isle Rich in Guano and Discord", 1235503609a9SYuri Pankov# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 1236503609a9SYuri Pankov# Jimmy Skaggs, _The Great Guano Rush_ (1994). 1237503609a9SYuri Pankov 1238503609a9SYuri Pankov################################################################################ 1239503609a9SYuri Pankov 1240503609a9SYuri Pankov 1241dafc4501SDan McDonald# From Paul Eggert (2017-02-10): 1242503609a9SYuri Pankov# 1243503609a9SYuri Pankov# Unless otherwise specified, the source for data through 1990 is: 1244503609a9SYuri Pankov# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 1245503609a9SYuri Pankov# San Diego: ACS Publications, Inc. (2003). 1246503609a9SYuri Pankov# Unfortunately this book contains many errors and cites no sources. 1247503609a9SYuri Pankov# 1248dafc4501SDan McDonald# Many years ago Gwillim Law wrote that a good source 1249dafc4501SDan McDonald# for time zone data was the International Air Transport 1250503609a9SYuri Pankov# Association's Standard Schedules Information Manual (IATA SSIM), 1251503609a9SYuri Pankov# published semiannually. Law sent in several helpful summaries 1252503609a9SYuri Pankov# of the IATA's data after 1990. Except where otherwise noted, 1253503609a9SYuri Pankov# IATA SSIM is the source for entries after 1990. 1254503609a9SYuri Pankov# 1255503609a9SYuri Pankov# Other sources occasionally used include: 1256503609a9SYuri Pankov# 1257374df668SAndy Fiddaman# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 1258374df668SAndy Fiddaman# <https://www.jstor.org/stable/1774359>. 1259374df668SAndy Fiddaman# 1260374df668SAndy Fiddaman# Pearce C. The Great Daylight Saving Time Controversy. 1261374df668SAndy Fiddaman# Australian Ebook Publisher. 2017. ISBN 978-1-925516-96-8. 1262374df668SAndy Fiddaman# 1263503609a9SYuri Pankov# Edward W. Whitman, World Time Differences, 1264503609a9SYuri Pankov# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 1265503609a9SYuri Pankov# which I found in the UCLA library. 1266503609a9SYuri Pankov# 1267503609a9SYuri Pankov# William Willett, The Waste of Daylight, 19th edition 1268503609a9SYuri Pankov# <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf> 1269503609a9SYuri Pankov# [PDF] (1914-03) 1270503609a9SYuri Pankov# 1271*e15592c8SRobert Mustacchi# For the 1911/1912 establishment of standard time in French possessions, see: 1272*e15592c8SRobert Mustacchi# Société Française de Physique, Recueil de constantes physiques (1913), 1273*e15592c8SRobert Mustacchi# page 752, 18b. 1274*e15592c8SRobert Mustacchi# 1275503609a9SYuri Pankov# See the 'europe' file for Greenland. 1276503609a9SYuri Pankov 1277503609a9SYuri Pankov# Canada 1278503609a9SYuri Pankov 1279503609a9SYuri Pankov# From Alain LaBonté (1994-11-14): 1280503609a9SYuri Pankov# I post here the time zone abbreviations standardized in Canada 1281503609a9SYuri Pankov# for both English and French in the CAN/CSA-Z234.4-89 standard.... 1282503609a9SYuri Pankov# 1283503609a9SYuri Pankov# UTC Standard time Daylight saving time 1284503609a9SYuri Pankov# offset French English French English 1285503609a9SYuri Pankov# -2:30 - - HAT NDT 1286503609a9SYuri Pankov# -3 - - HAA ADT 1287503609a9SYuri Pankov# -3:30 HNT NST - - 1288503609a9SYuri Pankov# -4 HNA AST HAE EDT 1289503609a9SYuri Pankov# -5 HNE EST HAC CDT 1290503609a9SYuri Pankov# -6 HNC CST HAR MDT 1291503609a9SYuri Pankov# -7 HNR MST HAP PDT 1292503609a9SYuri Pankov# -8 HNP PST HAY YDT 1293503609a9SYuri Pankov# -9 HNY YST - - 1294503609a9SYuri Pankov# 1295503609a9SYuri Pankov# HN: Heure Normale ST: Standard Time 1296503609a9SYuri Pankov# HA: Heure Avancée DT: Daylight saving Time 1297503609a9SYuri Pankov# 1298503609a9SYuri Pankov# A: de l'Atlantique Atlantic 1299503609a9SYuri Pankov# C: du Centre Central 1300503609a9SYuri Pankov# E: de l'Est Eastern 1301503609a9SYuri Pankov# M: Mountain 1302503609a9SYuri Pankov# N: Newfoundland 1303503609a9SYuri Pankov# P: du Pacifique Pacific 1304503609a9SYuri Pankov# R: des Rocheuses 1305503609a9SYuri Pankov# T: de Terre-Neuve 1306503609a9SYuri Pankov# Y: du Yukon Yukon 1307503609a9SYuri Pankov# 1308503609a9SYuri Pankov# From Paul Eggert (1994-11-22): 1309503609a9SYuri Pankov# Alas, this sort of thing must be handled by localization software. 1310503609a9SYuri Pankov 1311503609a9SYuri Pankov# Unless otherwise specified, the data entries for Canada are all from Shanks 1312503609a9SYuri Pankov# & Pottenger. 1313503609a9SYuri Pankov 1314503609a9SYuri Pankov# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, 1315503609a9SYuri Pankov# 2007-03-01): 1316503609a9SYuri Pankov# The British Columbia government announced yesterday that it will 1317503609a9SYuri Pankov# adjust daylight savings next year to align with changes in the 1318503609a9SYuri Pankov# U.S. and the rest of Canada.... 1319b654b02dSYuri Pankov# https://archive.news.gov.bc.ca/releases/news_releases_2005-2009/2006AG0014-000330.htm 1320503609a9SYuri Pankov# ... 1321503609a9SYuri Pankov# Nova Scotia 1322503609a9SYuri Pankov# Daylight saving time will be extended by four weeks starting in 2007.... 1323b654b02dSYuri Pankov# https://www.novascotia.ca/just/regulations/rg2/2006/ma1206.pdf 1324503609a9SYuri Pankov# 1325503609a9SYuri Pankov# [For New Brunswick] the new legislation dictates that the time change is to 1326503609a9SYuri Pankov# be done at 02:00 instead of 00:01. 1327b654b02dSYuri Pankov# https://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf 1328503609a9SYuri Pankov# ... 1329503609a9SYuri Pankov# Manitoba has traditionally changed the clock every fall at 03:00. 1330503609a9SYuri Pankov# As of 2006, the transition is to take place one hour earlier at 02:00. 1331b654b02dSYuri Pankov# https://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php 1332503609a9SYuri Pankov# ... 1333503609a9SYuri Pankov# [Alberta, Ontario, Quebec] will follow US rules. 1334503609a9SYuri Pankov# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM 1335503609a9SYuri Pankov# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm 1336503609a9SYuri Pankov# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF 1337503609a9SYuri Pankov# ... 1338503609a9SYuri Pankov# P.E.I. will follow US rules.... 1339503609a9SYuri Pankov# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf 1340503609a9SYuri Pankov# ... 1341503609a9SYuri Pankov# Province of Newfoundland and Labrador.... 1342503609a9SYuri Pankov# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm 1343503609a9SYuri Pankov# ... 1344503609a9SYuri Pankov# Yukon 1345b654b02dSYuri Pankov# https://www.gov.yk.ca/legislation/regs/oic2006_127.pdf 1346503609a9SYuri Pankov# ... 1347503609a9SYuri Pankov# N.W.T. will follow US rules. Whoever maintains the government web site 1348503609a9SYuri Pankov# does not seem to believe in bookmarks. To see the news release, click the 1349503609a9SYuri Pankov# following link and search for "Daylight Savings Time Change". Press the 1350503609a9SYuri Pankov# "Daylight Savings Time Change" link; it will fire off a popup using 1351503609a9SYuri Pankov# JavaScript. 1352503609a9SYuri Pankov# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive 1353503609a9SYuri Pankov# ... 1354503609a9SYuri Pankov# Nunavut 1355503609a9SYuri Pankov# An amendment to the Interpretation Act was registered on February 19/2007.... 1356503609a9SYuri Pankov# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf 1357503609a9SYuri Pankov 1358503609a9SYuri Pankov# From Paul Eggert (2014-10-18): 1359503609a9SYuri Pankov# H. David Matthews and Mary Vincent's map 1360503609a9SYuri Pankov# "It's about TIME", _Canadian Geographic_ (September-October 1998) 1361*e15592c8SRobert Mustacchi# https://web.archive.org/web/19990827055050/https://canadiangeographic.ca/SO98/geomap.htm 1362503609a9SYuri Pankov# contains detailed boundaries for regions observing nonstandard 1363503609a9SYuri Pankov# time and daylight saving time arrangements in Canada circa 1998. 1364503609a9SYuri Pankov# 1365503609a9SYuri Pankov# National Research Council Canada maintains info about time zones and DST. 1366b654b02dSYuri Pankov# https://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html 1367b654b02dSYuri Pankov# https://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 1368503609a9SYuri Pankov# Its unofficial information is often taken from Matthews and Vincent. 1369503609a9SYuri Pankov 1370503609a9SYuri Pankov# From Paul Eggert (2006-06-27): 1371503609a9SYuri Pankov# For now, assume all of DST-observing Canada will fall into line with the 1372503609a9SYuri Pankov# new US DST rules, 1373503609a9SYuri Pankov 1374503609a9SYuri Pankov# From Chris Walton (2011-12-01) 1375503609a9SYuri Pankov# In the first of Tammy Hardwick's articles 1376503609a9SYuri Pankov# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 1377503609a9SYuri Pankov# she quotes the Friday November 1/1918 edition of the Creston Review. 1378503609a9SYuri Pankov# The quote includes these two statements: 1379503609a9SYuri Pankov# 'Sunday the CPR went back to the old system of time...' 1380503609a9SYuri Pankov# '... The daylight saving scheme was dropped all over Canada at the same time,' 1381503609a9SYuri Pankov# These statements refer to a transition from daylight time to standard time 1382503609a9SYuri Pankov# that occurred nationally on Sunday October 27/1918. This transition was 1383503609a9SYuri Pankov# also documented in the Saturday October 26/1918 edition of the Toronto Star. 1384503609a9SYuri Pankov 1385503609a9SYuri Pankov# In light of that evidence, we alter the date from the earlier believed 1386503609a9SYuri Pankov# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day 1387503609a9SYuri Pankov# than Thursday) in all Canadian rulesets. 1388503609a9SYuri Pankov 1389f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 1390503609a9SYuri PankovRule Canada 1918 only - Apr 14 2:00 1:00 D 1391503609a9SYuri PankovRule Canada 1918 only - Oct 27 2:00 0 S 1392503609a9SYuri PankovRule Canada 1942 only - Feb 9 2:00 1:00 W # War 1393503609a9SYuri PankovRule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 1394503609a9SYuri PankovRule Canada 1945 only - Sep 30 2:00 0 S 1395503609a9SYuri PankovRule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 1396503609a9SYuri PankovRule Canada 1974 2006 - Oct lastSun 2:00 0 S 1397503609a9SYuri PankovRule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D 1398503609a9SYuri PankovRule Canada 2007 max - Mar Sun>=8 2:00 1:00 D 1399503609a9SYuri PankovRule Canada 2007 max - Nov Sun>=1 2:00 0 S 1400503609a9SYuri Pankov 1401503609a9SYuri Pankov 1402503609a9SYuri Pankov# Newfoundland and Labrador 1403503609a9SYuri Pankov 1404b654b02dSYuri Pankov# From Paul Eggert (2017-10-14): 1405b654b02dSYuri Pankov# Legally Labrador should observe Newfoundland time; see: 1406b654b02dSYuri Pankov# McLeod J. Labrador time - legal or not? St. John's Telegram, 2017-10-07 1407b654b02dSYuri Pankov# http://www.thetelegram.com/news/local/labrador-time--legal-or-not-154860/ 1408b654b02dSYuri Pankov# Matthews and Vincent (1998) write that the only part of Labrador 1409b654b02dSYuri Pankov# that follows the rules is the southeast corner, including Port Hope 1410b654b02dSYuri Pankov# Simpson and Mary's Harbour, but excluding, say, Black Tickle. 1411503609a9SYuri Pankov 1412f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 1413503609a9SYuri PankovRule StJohns 1917 only - Apr 8 2:00 1:00 D 1414503609a9SYuri PankovRule StJohns 1917 only - Sep 17 2:00 0 S 1415503609a9SYuri Pankov# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. 1416503609a9SYuri PankovRule StJohns 1919 only - May 5 23:00 1:00 D 1417503609a9SYuri PankovRule StJohns 1919 only - Aug 12 23:00 0 S 1418503609a9SYuri Pankov# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. 1419503609a9SYuri PankovRule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 1420503609a9SYuri PankovRule StJohns 1920 1935 - Oct lastSun 23:00 0 S 1421503609a9SYuri Pankov# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & 1422503609a9SYuri Pankov# Pottenger. 1423503609a9SYuri PankovRule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 1424503609a9SYuri PankovRule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 1425503609a9SYuri Pankov# Whitman gives the following transitions: 1426503609a9SYuri Pankov# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 1427503609a9SYuri Pankov# but go with Shanks & Pottenger and assume they used Canadian rules. 1428503609a9SYuri Pankov# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 1429503609a9SYuri Pankov# Apr 30 - Sep 24; go with Shanks & Pottenger. 1430503609a9SYuri PankovRule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 1431503609a9SYuri PankovRule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 1432503609a9SYuri PankovRule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 1433503609a9SYuri PankovRule StJohns 1951 1959 - Sep lastSun 2:00 0 S 1434503609a9SYuri PankovRule StJohns 1960 1986 - Oct lastSun 2:00 0 S 1435503609a9SYuri Pankov# From Paul Eggert (2000-10-02): 1436503609a9SYuri Pankov# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 1437503609a9SYuri Pankov# at 00:01 local time. For now, assume it started in 1987. 1438503609a9SYuri Pankov 1439503609a9SYuri Pankov# From Michael Pelley (2011-09-12): 1440503609a9SYuri Pankov# We received today, Monday, September 12, 2011, notification that the 1441503609a9SYuri Pankov# changes to the Newfoundland Standard Time Act have been proclaimed. 1442503609a9SYuri Pankov# The change in the Act stipulates that the change from Daylight Savings 1443503609a9SYuri Pankov# Time to Standard Time and from Standard Time to Daylight Savings Time 1444503609a9SYuri Pankov# now occurs at 2:00AM. 1445503609a9SYuri Pankov# ... 1446503609a9SYuri Pankov# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm 1447503609a9SYuri Pankov# ... 1448503609a9SYuri Pankov# MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery 1449503609a9SYuri Pankov# Office of the Chief Information Officer 1450503609a9SYuri Pankov# Executive Council 1451503609a9SYuri Pankov# Government of Newfoundland & Labrador 1452503609a9SYuri Pankov 1453503609a9SYuri PankovRule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 1454503609a9SYuri PankovRule StJohns 1987 2006 - Oct lastSun 0:01 0 S 1455503609a9SYuri PankovRule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 1456503609a9SYuri PankovRule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D 1457503609a9SYuri PankovRule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D 1458503609a9SYuri PankovRule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S 1459503609a9SYuri Pankov# 1460b4eb54e1SRobert Mustacchi# St John's has an apostrophe, but POSIX file names can't have apostrophes. 1461374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1462503609a9SYuri PankovZone America/St_Johns -3:30:52 - LMT 1884 1463503609a9SYuri Pankov -3:30:52 StJohns N%sT 1918 1464503609a9SYuri Pankov -3:30:52 Canada N%sT 1919 1465503609a9SYuri Pankov -3:30:52 StJohns N%sT 1935 Mar 30 1466503609a9SYuri Pankov -3:30 StJohns N%sT 1942 May 11 1467503609a9SYuri Pankov -3:30 Canada N%sT 1946 1468503609a9SYuri Pankov -3:30 StJohns N%sT 2011 Nov 1469503609a9SYuri Pankov -3:30 Canada N%sT 1470503609a9SYuri Pankov 1471503609a9SYuri Pankov# most of east Labrador 1472503609a9SYuri Pankov 1473503609a9SYuri Pankov# The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. 1474374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1475503609a9SYuri PankovZone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 1476503609a9SYuri Pankov -3:30:52 - NST 1918 1477503609a9SYuri Pankov -3:30:52 Canada N%sT 1919 1478503609a9SYuri Pankov -3:30:52 - NST 1935 Mar 30 1479503609a9SYuri Pankov -3:30 - NST 1936 1480503609a9SYuri Pankov -3:30 StJohns N%sT 1942 May 11 1481503609a9SYuri Pankov -3:30 Canada N%sT 1946 1482503609a9SYuri Pankov -3:30 StJohns N%sT 1966 Mar 15 2:00 1483503609a9SYuri Pankov -4:00 StJohns A%sT 2011 Nov 1484503609a9SYuri Pankov -4:00 Canada A%sT 1485503609a9SYuri Pankov 1486503609a9SYuri Pankov 14875254d4faSAndy Fiddaman# west Labrador, Nova Scotia, Prince Edward I, 14885254d4faSAndy Fiddaman# Îles-de-la-Madeleine, Listuguj reserve 1489503609a9SYuri Pankov 1490503609a9SYuri Pankov# From Brian Inglis (2015-07-20): 1491503609a9SYuri Pankov# From the historical weather station records available at: 1492503609a9SYuri Pankov# https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada 1493503609a9SYuri Pankov# Sydney shares the same time history as Glace Bay, so was 1494503609a9SYuri Pankov# likely to be the same across the island.... 1495503609a9SYuri Pankov# Sydney, as the capital and most populous location, or Cape Breton, would 1496503609a9SYuri Pankov# have been better names for the zone had we known this in 1996. 1497503609a9SYuri Pankov 1498503609a9SYuri Pankov# From Paul Eggert (2015-07-20): 1499503609a9SYuri Pankov# Shanks & Pottenger write that since 1970 most of this region has been like 1500503609a9SYuri Pankov# Halifax. Many locales did not observe peacetime DST until 1972; 1501503609a9SYuri Pankov# the Cape Breton area, represented by Glace Bay, is the largest we know of 1502503609a9SYuri Pankov# (Glace Bay was perhaps not the best name choice but no point changing now). 1503503609a9SYuri Pankov# Shanks & Pottenger also write that Liverpool, NS was the only town 1504503609a9SYuri Pankov# in Canada to observe DST in 1971 but not 1970; for now we'll assume 1505503609a9SYuri Pankov# this is a typo. 1506503609a9SYuri Pankov 15075254d4faSAndy Fiddaman# From Jeffery Nichols (2020-01-09): 15085254d4faSAndy Fiddaman# America/Halifax ... also applies to Îles-de-la-Madeleine and the Listuguj 15095254d4faSAndy Fiddaman# reserve in Quebec. Officially, this came into effect on January 1, 2007 15105254d4faSAndy Fiddaman# (Legal Time Act, CQLR c T-5.1), but the legislative debates surrounding that 15115254d4faSAndy Fiddaman# bill say that it is "accommodating the customs and practices" of those 15125254d4faSAndy Fiddaman# regions, which suggests that they have always been in-line with Halifax. 15135254d4faSAndy Fiddaman 1514f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 1515503609a9SYuri PankovRule Halifax 1916 only - Apr 1 0:00 1:00 D 1516503609a9SYuri PankovRule Halifax 1916 only - Oct 1 0:00 0 S 1517503609a9SYuri PankovRule Halifax 1920 only - May 9 0:00 1:00 D 1518503609a9SYuri PankovRule Halifax 1920 only - Aug 29 0:00 0 S 1519503609a9SYuri PankovRule Halifax 1921 only - May 6 0:00 1:00 D 1520503609a9SYuri PankovRule Halifax 1921 1922 - Sep 5 0:00 0 S 1521503609a9SYuri PankovRule Halifax 1922 only - Apr 30 0:00 1:00 D 1522503609a9SYuri PankovRule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 1523503609a9SYuri PankovRule Halifax 1923 only - Sep 4 0:00 0 S 1524503609a9SYuri PankovRule Halifax 1924 only - Sep 15 0:00 0 S 1525503609a9SYuri PankovRule Halifax 1925 only - Sep 28 0:00 0 S 1526503609a9SYuri PankovRule Halifax 1926 only - May 16 0:00 1:00 D 1527503609a9SYuri PankovRule Halifax 1926 only - Sep 13 0:00 0 S 1528503609a9SYuri PankovRule Halifax 1927 only - May 1 0:00 1:00 D 1529503609a9SYuri PankovRule Halifax 1927 only - Sep 26 0:00 0 S 1530503609a9SYuri PankovRule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 1531503609a9SYuri PankovRule Halifax 1928 only - Sep 9 0:00 0 S 1532503609a9SYuri PankovRule Halifax 1929 only - Sep 3 0:00 0 S 1533503609a9SYuri PankovRule Halifax 1930 only - Sep 15 0:00 0 S 1534503609a9SYuri PankovRule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 1535503609a9SYuri PankovRule Halifax 1932 only - May 1 0:00 1:00 D 1536503609a9SYuri PankovRule Halifax 1933 only - Apr 30 0:00 1:00 D 1537503609a9SYuri PankovRule Halifax 1933 only - Oct 2 0:00 0 S 1538503609a9SYuri PankovRule Halifax 1934 only - May 20 0:00 1:00 D 1539503609a9SYuri PankovRule Halifax 1934 only - Sep 16 0:00 0 S 1540503609a9SYuri PankovRule Halifax 1935 only - Jun 2 0:00 1:00 D 1541503609a9SYuri PankovRule Halifax 1935 only - Sep 30 0:00 0 S 1542503609a9SYuri PankovRule Halifax 1936 only - Jun 1 0:00 1:00 D 1543503609a9SYuri PankovRule Halifax 1936 only - Sep 14 0:00 0 S 1544503609a9SYuri PankovRule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 1545503609a9SYuri PankovRule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 1546503609a9SYuri PankovRule Halifax 1939 only - May 28 0:00 1:00 D 1547503609a9SYuri PankovRule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 1548503609a9SYuri PankovRule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 1549503609a9SYuri PankovRule Halifax 1946 1949 - Sep lastSun 2:00 0 S 1550503609a9SYuri PankovRule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 1551503609a9SYuri PankovRule Halifax 1951 1954 - Sep lastSun 2:00 0 S 1552503609a9SYuri PankovRule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 1553503609a9SYuri PankovRule Halifax 1956 1959 - Sep lastSun 2:00 0 S 1554503609a9SYuri PankovRule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 1555503609a9SYuri PankovRule Halifax 1962 1973 - Oct lastSun 2:00 0 S 1556374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1557503609a9SYuri PankovZone America/Halifax -4:14:24 - LMT 1902 Jun 15 1558503609a9SYuri Pankov -4:00 Halifax A%sT 1918 1559503609a9SYuri Pankov -4:00 Canada A%sT 1919 1560503609a9SYuri Pankov -4:00 Halifax A%sT 1942 Feb 9 2:00s 1561503609a9SYuri Pankov -4:00 Canada A%sT 1946 1562503609a9SYuri Pankov -4:00 Halifax A%sT 1974 1563503609a9SYuri Pankov -4:00 Canada A%sT 1564503609a9SYuri PankovZone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 1565503609a9SYuri Pankov -4:00 Canada A%sT 1953 1566503609a9SYuri Pankov -4:00 Halifax A%sT 1954 1567503609a9SYuri Pankov -4:00 - AST 1972 1568503609a9SYuri Pankov -4:00 Halifax A%sT 1974 1569503609a9SYuri Pankov -4:00 Canada A%sT 1570503609a9SYuri Pankov 1571503609a9SYuri Pankov# New Brunswick 1572503609a9SYuri Pankov 1573503609a9SYuri Pankov# From Paul Eggert (2007-01-31): 1574503609a9SYuri Pankov# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> 1575503609a9SYuri Pankov# says they changed at 00:01 through 2006, and 1576503609a9SYuri Pankov# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it 1577503609a9SYuri Pankov# clear that this was the case since at least 1993. 1578503609a9SYuri Pankov# For now, assume it started in 1993. 1579503609a9SYuri Pankov 1580f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 1581503609a9SYuri PankovRule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D 1582503609a9SYuri PankovRule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S 1583503609a9SYuri PankovRule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D 1584503609a9SYuri PankovRule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S 1585503609a9SYuri PankovRule Moncton 1939 only - May 27 1:00 1:00 D 1586503609a9SYuri PankovRule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S 1587503609a9SYuri PankovRule Moncton 1940 only - May 19 1:00 1:00 D 1588503609a9SYuri PankovRule Moncton 1941 only - May 4 1:00 1:00 D 1589503609a9SYuri PankovRule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D 1590503609a9SYuri PankovRule Moncton 1946 1956 - Sep lastSun 2:00 0 S 1591503609a9SYuri PankovRule Moncton 1957 1972 - Oct lastSun 2:00 0 S 1592503609a9SYuri PankovRule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D 1593503609a9SYuri PankovRule Moncton 1993 2006 - Oct lastSun 0:01 0 S 1594374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1595503609a9SYuri PankovZone America/Moncton -4:19:08 - LMT 1883 Dec 9 1596503609a9SYuri Pankov -5:00 - EST 1902 Jun 15 1597503609a9SYuri Pankov -4:00 Canada A%sT 1933 1598503609a9SYuri Pankov -4:00 Moncton A%sT 1942 1599503609a9SYuri Pankov -4:00 Canada A%sT 1946 1600503609a9SYuri Pankov -4:00 Moncton A%sT 1973 1601503609a9SYuri Pankov -4:00 Canada A%sT 1993 1602503609a9SYuri Pankov -4:00 Moncton A%sT 2007 1603503609a9SYuri Pankov -4:00 Canada A%sT 1604503609a9SYuri Pankov 1605503609a9SYuri Pankov# Quebec 1606503609a9SYuri Pankov 16075254d4faSAndy Fiddaman# From Paul Eggert (2020-01-10): 1608503609a9SYuri Pankov# See America/Toronto for most of Quebec, including Montreal. 16095254d4faSAndy Fiddaman# See America/Halifax for the Îles de la Madeleine and the Listuguj reserve. 161006965442SAndy Fiddaman# See America/Puerto_Rico for east of Natashquan. 1611503609a9SYuri Pankov 1612503609a9SYuri Pankov# Ontario 1613503609a9SYuri Pankov 1614503609a9SYuri Pankov# From Mark Brader (2003-07-26): 1615503609a9SYuri Pankov# [According to the Toronto Star] Orillia, Ontario, adopted DST 1616503609a9SYuri Pankov# effective Saturday, 1912-06-22, 22:00; the article mentions that 1617503609a9SYuri Pankov# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 1618503609a9SYuri Pankov# have already done so. In Orillia DST was to run until Saturday, 1619503609a9SYuri Pankov# 1912-08-31 (no time mentioned), but it was met with considerable 1620503609a9SYuri Pankov# hostility from certain segments of the public, and was revoked after 1621503609a9SYuri Pankov# only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but 1622503609a9SYuri Pankov# presumably that should be -07-06. (1912-06-19, -07-12; also letters 1623503609a9SYuri Pankov# earlier in June). 1624503609a9SYuri Pankov# 1625503609a9SYuri Pankov# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 1626b654b02dSYuri Pankov# 1627b654b02dSYuri Pankov# From Paul Eggert (2017-07-08): 1628b654b02dSYuri Pankov# For more on Orillia, see: Daubs K. Bold attempt at daylight saving 1629b654b02dSYuri Pankov# time became a comic failure in Orillia. Toronto Star 2017-07-08. 1630b654b02dSYuri Pankov# https://www.thestar.com/news/insight/2017/07/08/bold-attempt-at-daylight-saving-time-became-a-comic-failure-in-orillia.html 1631503609a9SYuri Pankov 1632503609a9SYuri Pankov# From Mark Brader (2010-03-06): 1633503609a9SYuri Pankov# 1634503609a9SYuri Pankov# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom 1635503609a9SYuri Pankov# right corner of page 1, it says that Toronto will return to standard 1636503609a9SYuri Pankov# time at 2 am Sunday morning (which agrees with the database), and that: 1637503609a9SYuri Pankov# 1638503609a9SYuri Pankov# The one-hour setback will go into effect throughout most of Ontario, 1639503609a9SYuri Pankov# except in areas like Windsor which remains on standard time all year. 1640503609a9SYuri Pankov# 1641f117aa50SRobert Mustacchi# ... I don't know if Windsor began observing DST when Detroit did, 1642f117aa50SRobert Mustacchi# or in 1974, or on some other date. 1643503609a9SYuri Pankov# 1644503609a9SYuri Pankov# By the way, the article continues by noting that: 1645503609a9SYuri Pankov# 1646503609a9SYuri Pankov# Some cities in the United States have pushed the deadline back 1647503609a9SYuri Pankov# three weeks and will change over from daylight saving in October. 1648503609a9SYuri Pankov 1649*e15592c8SRobert Mustacchi# From Chris Walton (2024-01-09): 1650*e15592c8SRobert Mustacchi# The [Toronto] changes in 1947, 1948, and 1949 took place at 2:00 a.m. local 1651*e15592c8SRobert Mustacchi# time instead of midnight.... Toronto Daily Star - ... 1652*e15592c8SRobert Mustacchi# April 2, 1947 - Page 39 ... April 7, 1948 - Page 13 ... 1653*e15592c8SRobert Mustacchi# April 2, 1949 - Page 1 ... April 7, 1949 - Page 24 ... 1654*e15592c8SRobert Mustacchi# November 25, 1949 - Page 52 ... April 21, 1950 - Page 14 ... 1655*e15592c8SRobert Mustacchi# September 19, 1950 - Page 46 ... September 20, 1950 - Page 3 ... 1656*e15592c8SRobert Mustacchi# November 24, 1950 - Page 21 1657*e15592c8SRobert Mustacchi 1658503609a9SYuri Pankov# From Arthur David Olson (2010-07-17): 1659503609a9SYuri Pankov# 1660503609a9SYuri Pankov# "Standard Time and Time Zones in Canada" appeared in 1661503609a9SYuri Pankov# The Journal of The Royal Astronomical Society of Canada, 1662503609a9SYuri Pankov# volume 26, number 2 (February 1932) and, as of 2010-07-17, 1663503609a9SYuri Pankov# was available at 1664503609a9SYuri Pankov# http://adsabs.harvard.edu/full/1932JRASC..26...49S 1665503609a9SYuri Pankov# 1666503609a9SYuri Pankov# It includes the text below (starting on page 57): 1667503609a9SYuri Pankov# 1668503609a9SYuri Pankov# A list of the places in Canada using daylight saving time would 1669503609a9SYuri Pankov# require yearly revision. From information kindly furnished by 1670503609a9SYuri Pankov# the provincial governments and by the postmasters in many cities 1671503609a9SYuri Pankov# and towns, it is found that the following places used daylight sav- 1672503609a9SYuri Pankov# ing in 1930. The information for the province of Quebec is definite, 1673503609a9SYuri Pankov# for the other provinces only approximate: 1674503609a9SYuri Pankov# 1675503609a9SYuri Pankov# Province Daylight saving time used 1676503609a9SYuri Pankov# Prince Edward Island Not used. 1677503609a9SYuri Pankov# Nova Scotia In Halifax only. 1678503609a9SYuri Pankov# New Brunswick In St. John only. 1679503609a9SYuri Pankov# Quebec In the following places: 1680503609a9SYuri Pankov# Montreal Lachine 1681503609a9SYuri Pankov# Quebec Mont-Royal 1682503609a9SYuri Pankov# Lévis Iberville 1683503609a9SYuri Pankov# St. Lambert Cap de la Madelèine 1684503609a9SYuri Pankov# Verdun Loretteville 1685503609a9SYuri Pankov# Westmount Richmond 1686503609a9SYuri Pankov# Outremont St. Jérôme 1687503609a9SYuri Pankov# Longueuil Greenfield Park 1688503609a9SYuri Pankov# Arvida Waterloo 1689503609a9SYuri Pankov# Chambly-Canton Beaulieu 1690503609a9SYuri Pankov# Melbourne La Tuque 1691503609a9SYuri Pankov# St. Théophile Buckingham 1692503609a9SYuri Pankov# Ontario Used generally in the cities and towns along 1693503609a9SYuri Pankov# the southerly part of the province. Not 1694503609a9SYuri Pankov# used in the northwesterly part. 1695503609a9SYuri Pankov# Manitoba Not used. 1696503609a9SYuri Pankov# Saskatchewan In Regina only. 1697503609a9SYuri Pankov# Alberta Not used. 1698503609a9SYuri Pankov# British Columbia Not used. 1699503609a9SYuri Pankov# 1700503609a9SYuri Pankov# With some exceptions, the use of daylight saving may be said to be limited 1701503609a9SYuri Pankov# to those cities and towns lying between Quebec city and Windsor, Ont. 1702503609a9SYuri Pankov 1703f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 1704503609a9SYuri PankovRule Toronto 1919 only - Mar 30 23:30 1:00 D 1705503609a9SYuri PankovRule Toronto 1919 only - Oct 26 0:00 0 S 1706503609a9SYuri PankovRule Toronto 1920 only - May 2 2:00 1:00 D 1707503609a9SYuri PankovRule Toronto 1920 only - Sep 26 0:00 0 S 1708503609a9SYuri PankovRule Toronto 1921 only - May 15 2:00 1:00 D 1709503609a9SYuri PankovRule Toronto 1921 only - Sep 15 2:00 0 S 1710503609a9SYuri PankovRule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 1711503609a9SYuri Pankov# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" 1712503609a9SYuri Pankov# was meant. 1713503609a9SYuri PankovRule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 1714503609a9SYuri PankovRule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 1715374df668SAndy FiddamanRule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 1716374df668SAndy FiddamanRule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 1717374df668SAndy FiddamanRule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 1718374df668SAndy FiddamanRule Toronto 1938 1939 - Sep lastSun 2:00 0 S 1719*e15592c8SRobert MustacchiRule Toronto 1945 1948 - Sep lastSun 2:00 0 S 1720*e15592c8SRobert MustacchiRule Toronto 1946 1973 - Apr lastSun 2:00 1:00 D 1721*e15592c8SRobert MustacchiRule Toronto 1949 1950 - Nov lastSun 2:00 0 S 1722503609a9SYuri PankovRule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1723503609a9SYuri Pankov# Shanks & Pottenger say Toronto ended DST a week early in 1971, 1724503609a9SYuri Pankov# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this 1725503609a9SYuri Pankov# is wrong, and that he had confirmed it by checking the 1971-10-30 1726503609a9SYuri Pankov# Toronto Star, which said that DST was ending 1971-10-31 as usual. 1727503609a9SYuri PankovRule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1728503609a9SYuri Pankov 1729f117aa50SRobert Mustacchi# The Bahamas match Toronto since 1970. 1730503609a9SYuri Pankov 1731374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1732503609a9SYuri PankovZone America/Toronto -5:17:32 - LMT 1895 1733503609a9SYuri Pankov -5:00 Canada E%sT 1919 1734503609a9SYuri Pankov -5:00 Toronto E%sT 1942 Feb 9 2:00s 1735503609a9SYuri Pankov -5:00 Canada E%sT 1946 1736503609a9SYuri Pankov -5:00 Toronto E%sT 1974 1737503609a9SYuri Pankov -5:00 Canada E%sT 173806965442SAndy Fiddaman# For Atikokan see America/Panama. 1739503609a9SYuri Pankov 1740503609a9SYuri Pankov 1741503609a9SYuri Pankov# Manitoba 1742503609a9SYuri Pankov 1743503609a9SYuri Pankov# From Rob Douglas (2006-04-06): 1744503609a9SYuri Pankov# the old Manitoba Time Act - as amended by Bill 2, assented to 1745503609a9SYuri Pankov# March 27, 1987 ... said ... 1746503609a9SYuri Pankov# "between two o'clock Central Standard Time in the morning of 1747503609a9SYuri Pankov# the first Sunday of April of each year and two o'clock Central 1748503609a9SYuri Pankov# Standard Time in the morning of the last Sunday of October next 1749503609a9SYuri Pankov# following, one hour in advance of Central Standard Time."... 1750503609a9SYuri Pankov# I believe that the English legislation [of the old time act] had 1751503609a9SYuri Pankov# been assented to (March 22, 1967).... 1752503609a9SYuri Pankov# Also, as far as I can tell, there was no order-in-council varying 1753503609a9SYuri Pankov# the time of Daylight Saving Time for 2005 and so the provisions of 1754503609a9SYuri Pankov# the 1987 version would apply - the changeover was at 2:00 Central 1755503609a9SYuri Pankov# Standard Time (i.e. not until 3:00 Central Daylight Time). 1756503609a9SYuri Pankov 1757503609a9SYuri Pankov# From Paul Eggert (2006-04-10): 1758503609a9SYuri Pankov# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) 1759503609a9SYuri Pankov# starting 1966. Since 02:00s is clearly correct for 1967 on, assume 1760503609a9SYuri Pankov# it was also 02:00s in 1966. 1761503609a9SYuri Pankov 1762f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 1763503609a9SYuri PankovRule Winn 1916 only - Apr 23 0:00 1:00 D 1764503609a9SYuri PankovRule Winn 1916 only - Sep 17 0:00 0 S 1765503609a9SYuri PankovRule Winn 1918 only - Apr 14 2:00 1:00 D 1766503609a9SYuri PankovRule Winn 1918 only - Oct 27 2:00 0 S 1767503609a9SYuri PankovRule Winn 1937 only - May 16 2:00 1:00 D 1768503609a9SYuri PankovRule Winn 1937 only - Sep 26 2:00 0 S 1769503609a9SYuri PankovRule Winn 1942 only - Feb 9 2:00 1:00 W # War 1770503609a9SYuri PankovRule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 1771503609a9SYuri PankovRule Winn 1945 only - Sep lastSun 2:00 0 S 1772503609a9SYuri PankovRule Winn 1946 only - May 12 2:00 1:00 D 1773503609a9SYuri PankovRule Winn 1946 only - Oct 13 2:00 0 S 1774503609a9SYuri PankovRule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 1775503609a9SYuri PankovRule Winn 1947 1949 - Sep lastSun 2:00 0 S 1776503609a9SYuri PankovRule Winn 1950 only - May 1 2:00 1:00 D 1777503609a9SYuri PankovRule Winn 1950 only - Sep 30 2:00 0 S 1778503609a9SYuri PankovRule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 1779503609a9SYuri PankovRule Winn 1951 1958 - Sep lastSun 2:00 0 S 1780503609a9SYuri PankovRule Winn 1959 only - Oct lastSun 2:00 0 S 1781503609a9SYuri PankovRule Winn 1960 only - Sep lastSun 2:00 0 S 1782503609a9SYuri PankovRule Winn 1963 only - Apr lastSun 2:00 1:00 D 1783503609a9SYuri PankovRule Winn 1963 only - Sep 22 2:00 0 S 1784503609a9SYuri PankovRule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D 1785503609a9SYuri PankovRule Winn 1966 2005 - Oct lastSun 2:00s 0 S 1786503609a9SYuri PankovRule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D 1787374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1788503609a9SYuri PankovZone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 1789503609a9SYuri Pankov -6:00 Winn C%sT 2006 1790503609a9SYuri Pankov -6:00 Canada C%sT 1791503609a9SYuri Pankov 1792503609a9SYuri Pankov 1793503609a9SYuri Pankov# Saskatchewan 1794503609a9SYuri Pankov 1795503609a9SYuri Pankov# From Mark Brader (2003-07-26): 1796503609a9SYuri Pankov# The first actual adoption of DST in Canada was at the municipal 1797503609a9SYuri Pankov# level. As the [Toronto] Star put it (1912-06-07), "While people 1798503609a9SYuri Pankov# elsewhere have long been talking of legislation to save daylight, 1799503609a9SYuri Pankov# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1800503609a9SYuri Pankov# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1801503609a9SYuri Pankov# presumably late evening, as below), and would run until "the end of 1802503609a9SYuri Pankov# the summer". The discrepancy between municipal time and railroad 1803503609a9SYuri Pankov# time was noted. 1804503609a9SYuri Pankov 1805503609a9SYuri Pankov# From Paul Eggert (2003-07-27): 1806503609a9SYuri Pankov# Willett (1914-03) notes that DST "has been in operation ... in the 1807503609a9SYuri Pankov# City of Moose Jaw, Saskatchewan, for one year." 1808503609a9SYuri Pankov 1809374df668SAndy Fiddaman# From Paul Eggert (2019-07-25): 1810374df668SAndy Fiddaman# Pearce's book says Regina observed DST in 1914-1917. No dates and times, 1811374df668SAndy Fiddaman# unfortunately. It also says that in 1914 Saskatoon observed DST 1812374df668SAndy Fiddaman# from 1 June to 6 July, and that DST was also tried out in Davidson, 1813374df668SAndy Fiddaman# Melfort, and Prince Albert. 1814374df668SAndy Fiddaman 1815503609a9SYuri Pankov# From Paul Eggert (2006-03-22): 1816503609a9SYuri Pankov# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. 1817503609a9SYuri Pankov# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 1818503609a9SYuri Pankov# Other western towns (e.g. Lloydminster) are like Edmonton. 1819503609a9SYuri Pankov# Matthews and Vincent (1998) write that Denare Beach and Creighton 1820503609a9SYuri Pankov# are like Winnipeg, in violation of Saskatchewan law. 1821503609a9SYuri Pankov 1822503609a9SYuri Pankov# From W. Jones (1992-11-06): 1823503609a9SYuri Pankov# The. . .below is based on information I got from our law library, the 1824503609a9SYuri Pankov# provincial archives, and the provincial Community Services department. 1825503609a9SYuri Pankov# A precise history would require digging through newspaper archives, and 1826503609a9SYuri Pankov# since you didn't say what you wanted, I didn't bother. 1827503609a9SYuri Pankov# 1828503609a9SYuri Pankov# Saskatchewan is split by a time zone meridian (105W) and over the years 1829503609a9SYuri Pankov# the boundary became pretty ragged as communities near it reevaluated 1830503609a9SYuri Pankov# their affiliations in one direction or the other. In 1965 a provincial 1831503609a9SYuri Pankov# referendum favoured legislating common time practices. 1832503609a9SYuri Pankov# 1833503609a9SYuri Pankov# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 1834503609a9SYuri Pankov# Saskatchewan 1978) was proclaimed, and established that the eastern 1835503609a9SYuri Pankov# part of Saskatchewan would use CST year round, that districts in 1836503609a9SYuri Pankov# northwest Saskatchewan would by default follow CST but could opt to 1837503609a9SYuri Pankov# follow Mountain Time rules (thus 1 hour difference in the winter and 1838503609a9SYuri Pankov# zero in the summer), and that districts in southwest Saskatchewan would 1839503609a9SYuri Pankov# by default follow MT but could opt to follow CST. 1840503609a9SYuri Pankov# 1841503609a9SYuri Pankov# It took a few years for the dust to settle (I know one story of a town 1842503609a9SYuri Pankov# on one time zone having its school in another, such that a mom had to 1843503609a9SYuri Pankov# serve her family lunch in two shifts), but presently it seems that only 1844503609a9SYuri Pankov# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 1845503609a9SYuri Pankov# rules any more; all other districts appear to have used CST year round 1846503609a9SYuri Pankov# since sometime in the 1960s. 1847503609a9SYuri Pankov 1848503609a9SYuri Pankov# From Chris Walton (2006-06-26): 1849503609a9SYuri Pankov# The Saskatchewan time act which was last updated in 1996 is about 30 pages 1850503609a9SYuri Pankov# long and rather painful to read. 1851503609a9SYuri Pankov# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf 1852503609a9SYuri Pankov 1853f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 1854503609a9SYuri PankovRule Regina 1918 only - Apr 14 2:00 1:00 D 1855503609a9SYuri PankovRule Regina 1918 only - Oct 27 2:00 0 S 1856503609a9SYuri PankovRule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 1857503609a9SYuri PankovRule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 1858503609a9SYuri PankovRule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 1859503609a9SYuri PankovRule Regina 1937 only - Oct Sun>=8 0:00 0 S 1860503609a9SYuri PankovRule Regina 1938 only - Oct Sun>=1 0:00 0 S 1861503609a9SYuri PankovRule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1862503609a9SYuri PankovRule Regina 1942 only - Feb 9 2:00 1:00 W # War 1863503609a9SYuri PankovRule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 1864503609a9SYuri PankovRule Regina 1945 only - Sep lastSun 2:00 0 S 1865503609a9SYuri PankovRule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 1866503609a9SYuri PankovRule Regina 1946 only - Oct Sun>=8 2:00 0 S 1867503609a9SYuri PankovRule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1868503609a9SYuri PankovRule Regina 1947 1957 - Sep lastSun 2:00 0 S 1869503609a9SYuri PankovRule Regina 1959 only - Apr lastSun 2:00 1:00 D 1870503609a9SYuri PankovRule Regina 1959 only - Oct lastSun 2:00 0 S 1871503609a9SYuri Pankov# 1872503609a9SYuri PankovRule Swift 1957 only - Apr lastSun 2:00 1:00 D 1873503609a9SYuri PankovRule Swift 1957 only - Oct lastSun 2:00 0 S 1874503609a9SYuri PankovRule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 1875503609a9SYuri PankovRule Swift 1959 only - Oct lastSun 2:00 0 S 1876503609a9SYuri PankovRule Swift 1960 1961 - Sep lastSun 2:00 0 S 1877374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1878503609a9SYuri PankovZone America/Regina -6:58:36 - LMT 1905 Sep 1879503609a9SYuri Pankov -7:00 Regina M%sT 1960 Apr lastSun 2:00 1880503609a9SYuri Pankov -6:00 - CST 1881503609a9SYuri PankovZone America/Swift_Current -7:11:20 - LMT 1905 Sep 1882503609a9SYuri Pankov -7:00 Canada M%sT 1946 Apr lastSun 2:00 1883503609a9SYuri Pankov -7:00 Regina M%sT 1950 1884503609a9SYuri Pankov -7:00 Swift M%sT 1972 Apr lastSun 2:00 1885503609a9SYuri Pankov -6:00 - CST 1886503609a9SYuri Pankov 1887503609a9SYuri Pankov 1888503609a9SYuri Pankov# Alberta 1889503609a9SYuri Pankov 189006965442SAndy Fiddaman# From Alois Treindl (2019-07-19): 1891374df668SAndy Fiddaman# There was no DST in Alberta in 1967... Calgary Herald, 29 April 1967. 1892374df668SAndy Fiddaman# 1969, no DST, from Edmonton Journal 18 April 1969 1893374df668SAndy Fiddaman# 1894374df668SAndy Fiddaman# From Paul Eggert (2019-07-25): 1895374df668SAndy Fiddaman# Pearce's book says that Alberta's 1948 Daylight Saving Act required 1896374df668SAndy Fiddaman# Mountain Standard Time without DST, and that "anyone who broke that law 1897374df668SAndy Fiddaman# could be fined up to $25 and costs". There seems to be no record of 1898374df668SAndy Fiddaman# anybody paying the fine. The law was not changed until an August 1971 1899374df668SAndy Fiddaman# plebiscite reinstituted DST in 1972. This story is also mentioned in: 1900374df668SAndy Fiddaman# Boyer JP. Forcing Choice: The Risky Reward of Referendums. Dundum. 2017. 1901374df668SAndy Fiddaman# ISBN 978-1459739123. 1902374df668SAndy Fiddaman 1903f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 1904503609a9SYuri PankovRule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 1905503609a9SYuri PankovRule Edm 1918 only - Oct 27 2:00 0 S 1906503609a9SYuri PankovRule Edm 1919 only - May 27 2:00 0 S 1907503609a9SYuri PankovRule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 1908503609a9SYuri PankovRule Edm 1920 only - Oct lastSun 2:00 0 S 1909503609a9SYuri PankovRule Edm 1921 1923 - Sep lastSun 2:00 0 S 1910503609a9SYuri PankovRule Edm 1942 only - Feb 9 2:00 1:00 W # War 1911503609a9SYuri PankovRule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 1912503609a9SYuri PankovRule Edm 1945 only - Sep lastSun 2:00 0 S 1913503609a9SYuri PankovRule Edm 1947 only - Apr lastSun 2:00 1:00 D 1914503609a9SYuri PankovRule Edm 1947 only - Sep lastSun 2:00 0 S 1915503609a9SYuri PankovRule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 1916503609a9SYuri PankovRule Edm 1972 2006 - Oct lastSun 2:00 0 S 1917374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1918503609a9SYuri PankovZone America/Edmonton -7:33:52 - LMT 1906 Sep 1919503609a9SYuri Pankov -7:00 Edm M%sT 1987 1920503609a9SYuri Pankov -7:00 Canada M%sT 1921503609a9SYuri Pankov 1922503609a9SYuri Pankov 1923503609a9SYuri Pankov# British Columbia 1924503609a9SYuri Pankov 1925503609a9SYuri Pankov# From Paul Eggert (2006-03-22): 1926503609a9SYuri Pankov# Shanks & Pottenger write that since 1970 most of this region has 1927503609a9SYuri Pankov# been like Vancouver. 1928503609a9SYuri Pankov# Dawson Creek uses MST. Much of east BC is like Edmonton. 1929503609a9SYuri Pankov 1930503609a9SYuri Pankov# From Matt Johnson (2015-09-21): 1931503609a9SYuri Pankov# Fort Nelson, BC, Canada will cancel DST this year. So while previously they 1932503609a9SYuri Pankov# were aligned with America/Vancouver, they're now aligned with 1933503609a9SYuri Pankov# America/Dawson_Creek. 1934503609a9SYuri Pankov# http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html 1935503609a9SYuri Pankov# 1936503609a9SYuri Pankov# From Tim Parenti (2015-09-23): 1937503609a9SYuri Pankov# This requires a new zone for the Northern Rockies Regional Municipality, 1938503609a9SYuri Pankov# America/Fort_Nelson. The resolution of 2014-12-08 was reached following a 1939503609a9SYuri Pankov# 2014-11-15 poll with nearly 75% support. Effectively, the municipality has 1940503609a9SYuri Pankov# been on MST (-0700) like Dawson Creek since it advanced its clocks on 1941503609a9SYuri Pankov# 2015-03-08. 1942503609a9SYuri Pankov# 1943374df668SAndy Fiddaman# From Paul Eggert (2019-07-25): 1944503609a9SYuri Pankov# Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver. 194506965442SAndy Fiddaman# Alois Treindl confirmed this on 07-22, citing the 1946-04-27 Vancouver Daily 1946374df668SAndy Fiddaman# Province. He also cited the 1946-09-28 Victoria Daily Times, which said 1947374df668SAndy Fiddaman# that Vancouver, Victoria, etc. "change at midnight Saturday"; for now, 1948374df668SAndy Fiddaman# guess they meant 02:00 Sunday since 02:00 was common practice in Vancouver. 1949374df668SAndy Fiddaman# 1950374df668SAndy Fiddaman# Early Vancouver, Volume Four, by Major J.S. Matthews, V.D., 2011 edition 1951374df668SAndy Fiddaman# says that a 1922 plebiscite adopted DST, but a 1923 plebiscite rejected it. 1952374df668SAndy Fiddaman# http://former.vancouver.ca/ctyclerk/archives/digitized/EarlyVan/SearchEarlyVan/Vol4pdf/MatthewsEarlyVancouverVol4_DaylightSavings.pdf 1953374df668SAndy Fiddaman# A catalog entry for a newspaper clipping seems to indicate that Vancouver 1954374df668SAndy Fiddaman# observed DST in 1941 from 07-07 through 09-27; see 1955374df668SAndy Fiddaman# https://searcharchives.vancouver.ca/daylight-saving-1918-starts-again-july-7-1941-start-d-s-sept-27-end-of-d-s-1941 1956374df668SAndy Fiddaman# We have no further details, so omit them for now. 1957503609a9SYuri Pankov 1958f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 1959503609a9SYuri PankovRule Vanc 1918 only - Apr 14 2:00 1:00 D 1960503609a9SYuri PankovRule Vanc 1918 only - Oct 27 2:00 0 S 1961503609a9SYuri PankovRule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1962503609a9SYuri PankovRule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 1963503609a9SYuri PankovRule Vanc 1945 only - Sep 30 2:00 0 S 1964503609a9SYuri PankovRule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 1965374df668SAndy FiddamanRule Vanc 1946 only - Sep 29 2:00 0 S 1966503609a9SYuri PankovRule Vanc 1947 1961 - Sep lastSun 2:00 0 S 1967503609a9SYuri PankovRule Vanc 1962 2006 - Oct lastSun 2:00 0 S 1968374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1969503609a9SYuri PankovZone America/Vancouver -8:12:28 - LMT 1884 1970503609a9SYuri Pankov -8:00 Vanc P%sT 1987 1971503609a9SYuri Pankov -8:00 Canada P%sT 1972503609a9SYuri PankovZone America/Dawson_Creek -8:00:56 - LMT 1884 1973503609a9SYuri Pankov -8:00 Canada P%sT 1947 1974503609a9SYuri Pankov -8:00 Vanc P%sT 1972 Aug 30 2:00 1975503609a9SYuri Pankov -7:00 - MST 1976503609a9SYuri PankovZone America/Fort_Nelson -8:10:47 - LMT 1884 1977503609a9SYuri Pankov -8:00 Vanc P%sT 1946 1978503609a9SYuri Pankov -8:00 - PST 1947 1979503609a9SYuri Pankov -8:00 Vanc P%sT 1987 1980503609a9SYuri Pankov -8:00 Canada P%sT 2015 Mar 8 2:00 1981503609a9SYuri Pankov -7:00 - MST 198206965442SAndy Fiddaman# For Creston see America/Phoenix. 1983503609a9SYuri Pankov 1984503609a9SYuri Pankov# Northwest Territories, Nunavut, Yukon 1985503609a9SYuri Pankov 1986af2e290bSAndy Fiddaman# From Chris Walton (2022-11-06): 1987af2e290bSAndy Fiddaman# Whitehorse Star - Thursday April 22, 1965 - page 1 1988af2e290bSAndy Fiddaman# title: DST Starts Monday ... 1989af2e290bSAndy Fiddaman# https://www.newspapers.com/image/578587481/ 1990af2e290bSAndy Fiddaman# The title of this first article is wrong and/or misleading. 1991af2e290bSAndy Fiddaman# Also, the start time shown in the article is vague; it simply says "after 1992af2e290bSAndy Fiddaman# midnight" when it probably should have stated 2:00a.m.... 1993af2e290bSAndy Fiddaman# 1994af2e290bSAndy Fiddaman# Whitehorse Star - Monday October 25, 1965 - page 15 ... 1995af2e290bSAndy Fiddaman# https://www.newspapers.com/image/578589147/ 1996af2e290bSAndy Fiddaman# The 1965 Yukon Council minutes can be found here: 1997af2e290bSAndy Fiddaman# http://assets.yukonarchives.ca/PER_YG_06_1965_C20_S02_v1.pdf 1998af2e290bSAndy Fiddaman# ... I do not currently believe that NWT touched any of its clocks in 1965.... 1999af2e290bSAndy Fiddaman# 2000af2e290bSAndy Fiddaman# Whitehorse Star - Thursday Feb 24,1966 - page 2 2001af2e290bSAndy Fiddaman# title: It's Time for YDT ... 2002af2e290bSAndy Fiddaman# https://www.newspapers.com/image/578575979/ ... 2003af2e290bSAndy Fiddaman# America/Whitehorse as a permanent change from UTC-9(YST) to 2004af2e290bSAndy Fiddaman# UTC-8(PST) at 00:00 on Sunday February 27, 1966.... 2005af2e290bSAndy Fiddaman# 2006af2e290bSAndy Fiddaman# Whitehorse Star - Friday April 28,1972 - page 6 2007af2e290bSAndy Fiddaman# title: Daylight Saving Time for N.W.T.... 2008af2e290bSAndy Fiddaman# https://www.newspapers.com/image/578701610/ ... 2009af2e290bSAndy Fiddaman# Nunavut and NWT zones ... DST starting in 1972.... Start and End ... 2010af2e290bSAndy Fiddaman# should be the same as the rest of Canada 2011af2e290bSAndy Fiddaman# 2012af2e290bSAndy Fiddaman# 2013af2e290bSAndy Fiddaman# From Paul Eggert (2022-11-06): 2014af2e290bSAndy Fiddaman# For now, assume Yukon's 1965-04-22 spring forward was 00:00 -> 02:00, as this 2015af2e290bSAndy Fiddaman# seems likely than 02:00 -> 04:00 and matches "after midnight". 2016af2e290bSAndy Fiddaman 2017503609a9SYuri Pankov# From Paul Eggert (2006-03-22): 2018503609a9SYuri Pankov# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 2019503609a9SYuri Pankov# Mathew Englander (1996-10-07) gives the following refs: 2020503609a9SYuri Pankov# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 2021503609a9SYuri Pankov# c. 7 defines Yukon standard time as UTC-9.... 2022503609a9SYuri Pankov# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 2023b654b02dSYuri Pankov# [https://www.canlii.org/en/ca/laws/stat/rsc-1985-c-i-21/latest/rsc-1985-c-i-21.html] 2024503609a9SYuri Pankov# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 2025503609a9SYuri Pankov# * O.I.C. 1980/02 established DST. 2026503609a9SYuri Pankov# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 2027503609a9SYuri Pankov 2028503609a9SYuri Pankov# From Brian Inglis (2015-04-14): 2029503609a9SYuri Pankov# 2030503609a9SYuri Pankov# I tried to trace the history of Yukon time and found the following 2031503609a9SYuri Pankov# regulations, giving the reference title and URL if found, regulation name, 2032503609a9SYuri Pankov# and relevant quote if available. Each regulation specifically revokes its 2033503609a9SYuri Pankov# predecessor. The final reference is to the current Interpretation Act 2034503609a9SYuri Pankov# authorizing and resulting from these regulatory changes. 2035503609a9SYuri Pankov# 2036503609a9SYuri Pankov# Only recent regulations were retrievable via Yukon government site search or 2037503609a9SYuri Pankov# index, and only some via Canadian legal sources. Other sources used include 2038503609a9SYuri Pankov# articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS 2039503609a9SYuri Pankov# Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and 2040503609a9SYuri Pankov# 1970 quoted below; each article includes current extracts from provincial 2041503609a9SYuri Pankov# and territorial ST and DST regulations at the end, summaries and details of 2042503609a9SYuri Pankov# standard times and daylight saving time at many locations across Canada, 2043503609a9SYuri Pankov# with time zone maps, tables and calculations for Canadian Sunrise, Sunset, 2044503609a9SYuri Pankov# and LMST; they also cover many countries and global locations, with a chart 2045503609a9SYuri Pankov# and table showing current Universal Time offsets, and may be useful as 2046503609a9SYuri Pankov# another source of information for 1970 and earlier. 2047503609a9SYuri Pankov# 2048503609a9SYuri Pankov# * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26, 2049503609a9SYuri Pankov# pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS) 2050503609a9SYuri Pankov# http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75: 2051503609a9SYuri Pankov# Yukon Interpretation Ordinance 2052503609a9SYuri Pankov# Yukon standard time is the local mean time at the one hundred and 2053503609a9SYuri Pankov# thirty-fifth meridian. 2054503609a9SYuri Pankov# 2055503609a9SYuri Pankov# * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.; 2056503609a9SYuri Pankov# JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System 2057503609a9SYuri Pankov# (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1: 2058503609a9SYuri Pankov# Yukon Interpretation Ordinance, 1955, Chap. 16. 2059503609a9SYuri Pankov# 2060503609a9SYuri Pankov# (1) Subject to this section, standard time shall be reckoned as nine 2061503609a9SYuri Pankov# hours behind Greenwich Time and called Yukon Standard Time. 2062503609a9SYuri Pankov# 2063503609a9SYuri Pankov# (2) Notwithstanding subsection (1), the Commissioner may make regulations 2064503609a9SYuri Pankov# varying the manner of reckoning standard time. 2065503609a9SYuri Pankov# 2066503609a9SYuri Pankov# * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance 2067374df668SAndy Fiddaman# [no online source found] 2068503609a9SYuri Pankov# 2069503609a9SYuri Pankov# * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC, 2070503609a9SYuri Pankov# Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS) 2071503609a9SYuri Pankov# http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon 2072503609a9SYuri Pankov# Territory Commissioner's Order 1967-59 Interpretation Ordinance ... 2073503609a9SYuri Pankov# 2074503609a9SYuri Pankov# 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon 2075503609a9SYuri Pankov# Territory on 27th January, 1966, is hereby revoked. 2076503609a9SYuri Pankov# 2077503609a9SYuri Pankov# 2. Yukon (East) Standard Time as defined by section 36 of the 2078503609a9SYuri Pankov# Interpretation Ordinance from and after mid-night on the 28th day of May, 2079503609a9SYuri Pankov# 1967 shall be reckoned in the same manner as Pacific Standard Time, that 2080503609a9SYuri Pankov# is to say, eight hours behind Greenwich Time in the area of the Yukon 2081503609a9SYuri Pankov# Territory lying east of the 138th degree longitude west. 2082503609a9SYuri Pankov# 2083503609a9SYuri Pankov# 3. In the remainder of the Territory, lying west of the 138th degree 2084503609a9SYuri Pankov# longitude west, Yukon (West) Standard Time shall be reckoned as nine 2085503609a9SYuri Pankov# hours behind Greenwich Time. 2086503609a9SYuri Pankov# 2087503609a9SYuri Pankov# * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214 2088b654b02dSYuri Pankov# https://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html 2089503609a9SYuri Pankov# C.O. 1973/214 INTERPRETATION ACT ... 2090503609a9SYuri Pankov# 2091503609a9SYuri Pankov# 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby 2092503609a9SYuri Pankov# revoked. 2093503609a9SYuri Pankov# 2094503609a9SYuri Pankov# 2. Yukon Standard Time as defined by section 36 of the Interpretation 2095503609a9SYuri Pankov# Act from and after midnight on the twenty-eighth day of October, 1973 2096503609a9SYuri Pankov# shall be reckoned in the same manner as Pacific Standard Time, that is 2097503609a9SYuri Pankov# to say eight hours behind Greenwich Time. 2098503609a9SYuri Pankov# 2099503609a9SYuri Pankov# * O.I.C. 1980/02 INTERPRETATION ACT 2100f915e6d3SRobert Mustacchi# https://mm.icann.org/pipermail/tz/attachments/20201125/d5adc93b/CAYTOIC1980-02DST1980-01-04-0001.pdf 2101503609a9SYuri Pankov# 2102503609a9SYuri Pankov# * Yukon Daylight Saving Time, YOIC 1987/56 2103b654b02dSYuri Pankov# https://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html 2104503609a9SYuri Pankov# O.I.C. 1987/056 INTERPRETATION ACT ... 2105503609a9SYuri Pankov# 2106503609a9SYuri Pankov# In every year between 2107503609a9SYuri Pankov# (a) two o'clock in the morning in the first Sunday in April, and 2108503609a9SYuri Pankov# (b) two o'clock in the morning in the last Sunday in October, 2109503609a9SYuri Pankov# Standard Time shall be reckoned as seven hours behind Greenwich Time and 2110503609a9SYuri Pankov# called Yukon Daylight Saving Time. 2111503609a9SYuri Pankov# ... 2112503609a9SYuri Pankov# Dated ... 9th day of March, A.D., 1987. 2113503609a9SYuri Pankov# 2114503609a9SYuri Pankov# * Yukon Daylight Saving Time 2006, YOIC 2006/127 2115b654b02dSYuri Pankov# https://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html 2116503609a9SYuri Pankov# O.I.C. 2006/127 INTERPRETATION ACT ... 2117503609a9SYuri Pankov# 2118503609a9SYuri Pankov# 1. In Yukon each year the time for general purposes shall be 7 hours 2119503609a9SYuri Pankov# behind Greenwich mean time during the period commencing at two o'clock 2120503609a9SYuri Pankov# in the forenoon on the second Sunday of March and ending at two o'clock 2121503609a9SYuri Pankov# in the forenoon on the first Sunday of November and shall be called 2122503609a9SYuri Pankov# Yukon Daylight Saving Time. 2123503609a9SYuri Pankov# 2124503609a9SYuri Pankov# 2. Order-in-Council 1987/56 is revoked. 2125503609a9SYuri Pankov# 2126503609a9SYuri Pankov# 3. This order comes into force January 1, 2007. 2127503609a9SYuri Pankov# 2128503609a9SYuri Pankov# * Interpretation Act, RSY 2002, c 125 2129b654b02dSYuri Pankov# https://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html 2130503609a9SYuri Pankov 2131af2e290bSAndy Fiddaman# From Chris Walton (2022-11-06): 2132af2e290bSAndy Fiddaman# The 5th edition of the Atlas of Canada contains a time zone map that 2133af2e290bSAndy Fiddaman# shows both legislated and observed time zone boundaries. 2134af2e290bSAndy Fiddaman# All communities on Baffin Island are shown to be observing Eastern time. 2135af2e290bSAndy Fiddaman# The date on the map is 1984. 2136af2e290bSAndy Fiddaman# https://ftp.maps.canada.ca/pub/nrcan_rncan/raster/atlas_5_ed/eng/other/referencemaps/mcr4056.pdf 2137af2e290bSAndy Fiddaman 2138503609a9SYuri Pankov# From Rives McDow (1999-09-04): 2139503609a9SYuri Pankov# Nunavut ... moved ... to incorporate the whole territory into one time zone. 2140503609a9SYuri Pankov# Nunavut moves to single time zone Oct. 31 2141503609a9SYuri Pankov# http://www.nunatsiaq.com/nunavut/nvt90903_13.html 2142503609a9SYuri Pankov 2143503609a9SYuri Pankov# From Paul Eggert (1999-09-20): 2144503609a9SYuri Pankov# Basic Facts: The New Territory 2145503609a9SYuri Pankov# http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html 2146af2e290bSAndy Fiddaman# (1999) reports that ... Coral Harbour does not observe DST. 2147503609a9SYuri Pankov 2148503609a9SYuri Pankov# From Paul Eggert (2000-10-02): 2149503609a9SYuri Pankov# Matthews and Vincent (1998) say the following, but we lack histories 2150503609a9SYuri Pankov# for these potential new Zones. 2151503609a9SYuri Pankov# 2152503609a9SYuri Pankov# The Canadian Forces station at Alert uses Eastern Time while the 2153503609a9SYuri Pankov# handful of residents at the Eureka weather station [in the Central 2154503609a9SYuri Pankov# zone] skip daylight savings. Baffin Island, which is crossed by the 2155503609a9SYuri Pankov# Central, Eastern and Atlantic Time zones only uses Eastern Time. 2156503609a9SYuri Pankov# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 2157503609a9SYuri Pankov# Central Time and Southampton Island [in the Central zone] is not 2158503609a9SYuri Pankov# required to use daylight savings. 2159503609a9SYuri Pankov 2160b654b02dSYuri Pankov# From <http://www.nunatsiaqonline.ca/archives/nunavut001130/nvt21110_02.html> 2161503609a9SYuri Pankov# Nunavut now has two time zones (2000-11-10): 2162503609a9SYuri Pankov# The Nunavut government would allow its employees in Kugluktuk and 2163503609a9SYuri Pankov# Cambridge Bay to operate on central time year-round, putting them 2164503609a9SYuri Pankov# one hour behind the rest of Nunavut for six months during the winter. 2165503609a9SYuri Pankov# At the end of October the two communities had rebelled against 2166503609a9SYuri Pankov# Nunavut's unified time zone, refusing to shift to eastern time with 2167503609a9SYuri Pankov# the rest of the territory for the winter. Cambridge Bay remained on 2168503609a9SYuri Pankov# central time, while Kugluktuk, even farther west, reverted to 2169503609a9SYuri Pankov# mountain time, which they had used before the advent of Nunavut's 2170503609a9SYuri Pankov# unified time zone in 1999. 2171503609a9SYuri Pankov# 2172503609a9SYuri Pankov# From Rives McDow (2001-01-20), quoting the Nunavut government: 2173503609a9SYuri Pankov# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 2174503609a9SYuri Pankov 2175503609a9SYuri Pankov# From Paul Eggert (2000-12-04): 2176503609a9SYuri Pankov# Let's just keep track of the official times for now. 2177503609a9SYuri Pankov 2178503609a9SYuri Pankov# From Rives McDow (2001-03-07): 2179503609a9SYuri Pankov# The premier of Nunavut has issued a ministerial statement advising 2180503609a9SYuri Pankov# that effective 2001-04-01, the territory of Nunavut will revert 2181503609a9SYuri Pankov# back to three time zones (mountain, central, and eastern). Of the 2182503609a9SYuri Pankov# cities in Nunavut, Coral Harbor is the only one that I know of that 2183503609a9SYuri Pankov# has said it will not observe dst, staying on EST year round. I'm 2184503609a9SYuri Pankov# checking for more info, and will get back to you if I come up with 2185503609a9SYuri Pankov# more. 2186503609a9SYuri Pankov# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 2187503609a9SYuri Pankov 2188503609a9SYuri Pankov# From Gwillim Law (2005-05-21): 2189503609a9SYuri Pankov# According to ... 2190503609a9SYuri Pankov# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp 2191503609a9SYuri Pankov# (from a 1998 Canadian Geographic article), the de facto and de jure time 2192503609a9SYuri Pankov# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year 2193503609a9SYuri Pankov# round. Using Google, it's easy to find other websites that confirm this. 2194503609a9SYuri Pankov# I wasn't able to find how far back this time regimen goes, but since it 2195503609a9SYuri Pankov# predates the creation of Nunavut, it probably goes back many years.... 2196503609a9SYuri Pankov# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. 2197503609a9SYuri Pankov# 2198503609a9SYuri Pankov# From Paul Eggert (2014-10-17): 2199503609a9SYuri Pankov# For lack of better information, assume that Southampton Island observed 2200503609a9SYuri Pankov# daylight saving only during wartime. Gwillim Law's email also 2201503609a9SYuri Pankov# mentioned maps now maintained by National Research Council Canada; 2202503609a9SYuri Pankov# see above for an up-to-date link. 2203503609a9SYuri Pankov 2204503609a9SYuri Pankov# From Chris Walton (2007-03-01): 2205503609a9SYuri Pankov# ... the community of Resolute (located on Cornwallis Island in 2206503609a9SYuri Pankov# Nunavut) moved from Central Time to Eastern Time last November. 2207503609a9SYuri Pankov# Basically the community did not change its clocks at the end of 2208503609a9SYuri Pankov# daylight saving.... 2209503609a9SYuri Pankov# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html 2210503609a9SYuri Pankov 2211503609a9SYuri Pankov# From Chris Walton (2011-03-21): 2212503609a9SYuri Pankov# Back in 2007 I initiated the creation of a new "zone file" for Resolute 2213503609a9SYuri Pankov# Bay. Resolute Bay is a small community located about 900km north of 2214503609a9SYuri Pankov# the Arctic Circle. The zone file was required because Resolute Bay had 2215503609a9SYuri Pankov# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. 2216503609a9SYuri Pankov# 2217503609a9SYuri Pankov# According to new information which I received last week, Resolute Bay 2218503609a9SYuri Pankov# went back to using UTC-6 in the winter of 2007-2008... 2219503609a9SYuri Pankov# 2220503609a9SYuri Pankov# On March 11/2007 most of Canada went onto daylight saving. On March 2221503609a9SYuri Pankov# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I 2222503609a9SYuri Pankov# talked to somebody that was both knowledgeable and helpful. I was able 2223503609a9SYuri Pankov# to confirm that Resolute Bay was still operating on UTC-5. It was 2224503609a9SYuri Pankov# explained to me that Resolute Bay had been on the Eastern Time zone 2225503609a9SYuri Pankov# (EST) in the winter, and was now back on the Central Time zone (CDT). 2226503609a9SYuri Pankov# i.e. the time zone had changed twice in the last year but the clocks 2227503609a9SYuri Pankov# had not moved. The residents had to know which time zone they were in 2228503609a9SYuri Pankov# so they could follow the correct TV schedule... 2229503609a9SYuri Pankov# 2230503609a9SYuri Pankov# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I 2231503609a9SYuri Pankov# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature 2232503609a9SYuri Pankov# of the phone call, I decided to seek out an alternate source of 2233503609a9SYuri Pankov# information. I found an e-mail address for somebody by the name of 2234503609a9SYuri Pankov# Stephanie Adams whose job was listed as "Inns North Support Officer for 2235503609a9SYuri Pankov# Arctic Co-operatives." I was under the impression that Stephanie lived 2236503609a9SYuri Pankov# and worked in Resolute Bay... 2237503609a9SYuri Pankov# 2238503609a9SYuri Pankov# On March 14/2011 I phoned the hamlet office again. I was told that 2239503609a9SYuri Pankov# Resolute Bay had been using Central Standard Time over the winter of 2240503609a9SYuri Pankov# 2010-2011 and that the clocks had therefore been moved one hour ahead 2241503609a9SYuri Pankov# on March 13/2011. The person I talked to was aware that Resolute Bay 2242503609a9SYuri Pankov# had previously experimented with Eastern Standard Time but he could not 2243503609a9SYuri Pankov# tell me when the practice had stopped. 2244503609a9SYuri Pankov# 2245503609a9SYuri Pankov# On March 17/2011 I searched the Web to find an e-mail address of 2246503609a9SYuri Pankov# somebody that might be able to tell me exactly when Resolute Bay went 2247503609a9SYuri Pankov# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz 2248503609a9SYuri Pankov# used to be the mayor of Resolute Bay and he apparently owns half the 2249503609a9SYuri Pankov# businesses including "South Camp Inn." This website has some info on 2250503609a9SYuri Pankov# Aziz: 2251503609a9SYuri Pankov# http://www.uphere.ca/node/493 2252503609a9SYuri Pankov# 2253503609a9SYuri Pankov# I sent Aziz an e-mail asking when Resolute Bay had stopped using 2254503609a9SYuri Pankov# Eastern Standard Time. 2255503609a9SYuri Pankov# 2256503609a9SYuri Pankov# Aziz responded quickly with this: "hi, The time was not changed for the 2257503609a9SYuri Pankov# 1 year only, the following year, the community went back to the old way 2258503609a9SYuri Pankov# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in 2259503609a9SYuri Pankov# the winter Zulu plus 6 hrs" 2260503609a9SYuri Pankov# 2261503609a9SYuri Pankov# This of course conflicted with everything I had ascertained in November 2008. 2262503609a9SYuri Pankov# 2263503609a9SYuri Pankov# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz 2264503609a9SYuri Pankov# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You 2265503609a9SYuri Pankov# may want to check with the weather office in Resolute Bay or do a 2266503609a9SYuri Pankov# search on the weather through Env. Canada. web site" 2267503609a9SYuri Pankov# 2268503609a9SYuri Pankov# If I had realized the Stephanie did not live in Resolute Bay I would 2269503609a9SYuri Pankov# never have contacted her. I now believe that all the information I 2270503609a9SYuri Pankov# obtained in November 2008 should be ignored... 2271503609a9SYuri Pankov# I apologize for reporting incorrect information in 2008. 2272503609a9SYuri Pankov 22735254d4faSAndy Fiddaman# From Tim Parenti (2020-03-05): 22745254d4faSAndy Fiddaman# The government of Yukon announced [yesterday] the cessation of seasonal time 22755254d4faSAndy Fiddaman# changes. "After clocks are pushed ahead one hour on March 8, the territory 22765254d4faSAndy Fiddaman# will remain on [UTC-07]. ... [The government] found 93 per cent of 22775254d4faSAndy Fiddaman# respondents wanted to end seasonal time changes and, of that group, 70 per 22785254d4faSAndy Fiddaman# cent wanted 'permanent Pacific Daylight Saving Time.'" 22795254d4faSAndy Fiddaman# https://www.cbc.ca/news/canada/north/yukon-end-daylight-saving-time-1.5486358 22805254d4faSAndy Fiddaman# 22815254d4faSAndy Fiddaman# Although the government press release prefers PDT, we prefer MST for 22825254d4faSAndy Fiddaman# consistency with nearby Dawson Creek, Creston, and Fort Nelson. 22835254d4faSAndy Fiddaman# https://yukon.ca/en/news/yukon-end-seasonal-time-change 22845254d4faSAndy Fiddaman 2285f915e6d3SRobert Mustacchi# From Andrew G. Smith (2020-09-24): 2286f915e6d3SRobert Mustacchi# Yukon has completed its regulatory change to be on UTC -7 year-round.... 2287f915e6d3SRobert Mustacchi# http://www.gov.yk.ca/legislation/regs/oic2020_125.pdf 2288f915e6d3SRobert Mustacchi# What we have done is re-defined Yukon Standard Time, as we are 2289f915e6d3SRobert Mustacchi# authorized to do under section 33 of our Interpretation Act: 2290f915e6d3SRobert Mustacchi# http://www.gov.yk.ca/legislation/acts/interpretation_c.pdf 2291f915e6d3SRobert Mustacchi# 2292f915e6d3SRobert Mustacchi# From Paul Eggert (2020-09-24): 2293f915e6d3SRobert Mustacchi# tzdb uses the obsolete YST abbreviation for standard time in Yukon through 2294f915e6d3SRobert Mustacchi# about 1970, and uses PST for standard time in Yukon since then. Consistent 2295f915e6d3SRobert Mustacchi# with that, use MST for -07, the new standard time in Yukon effective Nov. 1. 2296f915e6d3SRobert Mustacchi 2297f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 2298503609a9SYuri PankovRule NT_YK 1918 only - Apr 14 2:00 1:00 D 2299503609a9SYuri PankovRule NT_YK 1918 only - Oct 27 2:00 0 S 2300503609a9SYuri PankovRule NT_YK 1919 only - May 25 2:00 1:00 D 2301503609a9SYuri PankovRule NT_YK 1919 only - Nov 1 0:00 0 S 2302503609a9SYuri PankovRule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 2303503609a9SYuri PankovRule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 2304503609a9SYuri PankovRule NT_YK 1945 only - Sep 30 2:00 0 S 2305af2e290bSAndy FiddamanRule NT_YK 1972 1986 - Apr lastSun 2:00 1:00 D 2306af2e290bSAndy FiddamanRule NT_YK 1972 2006 - Oct lastSun 2:00 0 S 2307503609a9SYuri PankovRule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D 2308af2e290bSAndy FiddamanRule Yukon 1965 only - Apr lastSun 0:00 2:00 DD 2309af2e290bSAndy FiddamanRule Yukon 1965 only - Oct lastSun 2:00 0 S 2310374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 2311503609a9SYuri Pankov# formerly Frobisher Bay 2312503609a9SYuri PankovZone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est. 2313503609a9SYuri Pankov -5:00 NT_YK E%sT 1999 Oct 31 2:00 2314503609a9SYuri Pankov -6:00 Canada C%sT 2000 Oct 29 2:00 2315503609a9SYuri Pankov -5:00 Canada E%sT 2316503609a9SYuri Pankov# aka Qausuittuq 2317503609a9SYuri PankovZone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded 2318503609a9SYuri Pankov -6:00 NT_YK C%sT 2000 Oct 29 2:00 2319503609a9SYuri Pankov -5:00 - EST 2001 Apr 1 3:00 2320503609a9SYuri Pankov -6:00 Canada C%sT 2006 Oct 29 2:00 2321503609a9SYuri Pankov -5:00 - EST 2007 Mar 11 3:00 2322503609a9SYuri Pankov -6:00 Canada C%sT 2323503609a9SYuri Pankov# aka Kangiqiniq 2324503609a9SYuri PankovZone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded 2325503609a9SYuri Pankov -6:00 NT_YK C%sT 2000 Oct 29 2:00 2326503609a9SYuri Pankov -5:00 - EST 2001 Apr 1 3:00 2327503609a9SYuri Pankov -6:00 Canada C%sT 2328503609a9SYuri Pankov# aka Iqaluktuuttiaq 2329503609a9SYuri PankovZone America/Cambridge_Bay 0 - -00 1920 # trading post est.? 2330503609a9SYuri Pankov -7:00 NT_YK M%sT 1999 Oct 31 2:00 2331503609a9SYuri Pankov -6:00 Canada C%sT 2000 Oct 29 2:00 2332503609a9SYuri Pankov -5:00 - EST 2000 Nov 5 0:00 2333503609a9SYuri Pankov -6:00 - CST 2001 Apr 1 3:00 2334503609a9SYuri Pankov -7:00 Canada M%sT 2335503609a9SYuri PankovZone America/Inuvik 0 - -00 1953 # Inuvik founded 2336503609a9SYuri Pankov -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 2337503609a9SYuri Pankov -7:00 NT_YK M%sT 1980 2338503609a9SYuri Pankov -7:00 Canada M%sT 2339503609a9SYuri PankovZone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 2340af2e290bSAndy Fiddaman -9:00 NT_YK Y%sT 1965 2341af2e290bSAndy Fiddaman -9:00 Yukon Y%sT 1966 Feb 27 0:00 2342af2e290bSAndy Fiddaman -8:00 - PST 1980 2343f915e6d3SRobert Mustacchi -8:00 Canada P%sT 2020 Nov 1 23445254d4faSAndy Fiddaman -7:00 - MST 2345503609a9SYuri PankovZone America/Dawson -9:17:40 - LMT 1900 Aug 20 2346af2e290bSAndy Fiddaman -9:00 NT_YK Y%sT 1965 2347af2e290bSAndy Fiddaman -9:00 Yukon Y%sT 1973 Oct 28 0:00 2348af2e290bSAndy Fiddaman -8:00 - PST 1980 2349f915e6d3SRobert Mustacchi -8:00 Canada P%sT 2020 Nov 1 23505254d4faSAndy Fiddaman -7:00 - MST 2351503609a9SYuri Pankov 2352503609a9SYuri Pankov 2353503609a9SYuri Pankov############################################################################### 2354503609a9SYuri Pankov 2355503609a9SYuri Pankov# Mexico 2356503609a9SYuri Pankov 2357503609a9SYuri Pankov# From Paul Eggert (2014-12-07): 2358503609a9SYuri Pankov# The Investigation and Analysis Service of the 2359503609a9SYuri Pankov# Mexican Library of Congress (MLoC) has published a 2360503609a9SYuri Pankov# history of Mexican local time (in Spanish) 2361503609a9SYuri Pankov# http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm 2362503609a9SYuri Pankov# 2363503609a9SYuri Pankov# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. 2364503609a9SYuri Pankov# (In all cases we go with the MLoC.) 2365503609a9SYuri Pankov# S&P report that Baja was at -8:00 in 1922/1923. 2366503609a9SYuri Pankov# S&P say the 1930 transition in Baja was 1930-11-16. 2367503609a9SYuri Pankov# S&P report no DST during summer 1931. 2368503609a9SYuri Pankov# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. 2369503609a9SYuri Pankov 2370503609a9SYuri Pankov# From Gwillim Law (2001-02-20): 2371503609a9SYuri Pankov# There are some other discrepancies between the Decrees page and the 2372503609a9SYuri Pankov# tz database. I think they can best be explained by supposing that 2373503609a9SYuri Pankov# the researchers who prepared the Decrees page failed to find some of 2374503609a9SYuri Pankov# the relevant documents. 2375503609a9SYuri Pankov 2376503609a9SYuri Pankov# From Alan Perry (1996-02-15): 2377503609a9SYuri Pankov# A guy from our Mexico subsidiary finally found the Presidential Decree 2378503609a9SYuri Pankov# outlining the timezone changes in Mexico. 2379503609a9SYuri Pankov# 2380503609a9SYuri Pankov# ------------- Begin Forwarded Message ------------- 2381503609a9SYuri Pankov# 2382503609a9SYuri Pankov# I finally got my hands on the Official Presidential Decree that sets up the 2383503609a9SYuri Pankov# rules for the DST changes. The rules are: 2384503609a9SYuri Pankov# 2385503609a9SYuri Pankov# 1. The country is divided in 3 timezones: 2386503609a9SYuri Pankov# - Baja California Norte (the Mexico/BajaNorte TZ) 2387503609a9SYuri Pankov# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 2388503609a9SYuri Pankov# - The rest of the country (the Mexico/General TZ) 2389503609a9SYuri Pankov# 2390503609a9SYuri Pankov# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 2391503609a9SYuri Pankov# at 2:00 AM, the times in each zone are as follows: 2392503609a9SYuri Pankov# BajaNorte: GMT+7 2393503609a9SYuri Pankov# BajaSur: GMT+6 2394503609a9SYuri Pankov# General: GMT+5 2395503609a9SYuri Pankov# 2396503609a9SYuri Pankov# 3. The rest of the year, the times are as follows: 2397503609a9SYuri Pankov# BajaNorte: GMT+8 2398503609a9SYuri Pankov# BajaSur: GMT+7 2399503609a9SYuri Pankov# General: GMT+6 2400503609a9SYuri Pankov# 2401503609a9SYuri Pankov# The Decree was published in Mexico's Official Newspaper on January 4th. 2402503609a9SYuri Pankov# 2403503609a9SYuri Pankov# -------------- End Forwarded Message -------------- 2404503609a9SYuri Pankov# From Paul Eggert (1996-06-12): 2405503609a9SYuri Pankov# For an English translation of the decree, see 2406503609a9SYuri Pankov# "Diario Oficial: Time Zone Changeover" (1996-01-04). 2407503609a9SYuri Pankov# http://mexico-travel.com/extra/timezone_eng.html 2408503609a9SYuri Pankov 2409503609a9SYuri Pankov# From Rives McDow (1998-10-08): 2410503609a9SYuri Pankov# The State of Quintana Roo has reverted back to central STD and DST times 2411503609a9SYuri Pankov# (i.e. UTC -0600 and -0500 as of 1998-08-02). 2412503609a9SYuri Pankov 2413503609a9SYuri Pankov# From Rives McDow (2000-01-10): 2414503609a9SYuri Pankov# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 2415503609a9SYuri Pankov# zone 5 hours from the International Date Line, and will not observe daylight 2416503609a9SYuri Pankov# savings time so as to stay on the same time zone as the southern part of 2417503609a9SYuri Pankov# Arizona year round. 2418503609a9SYuri Pankov 2419503609a9SYuri Pankov# From Jesper Nørgaard, translating 2420503609a9SYuri Pankov# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 2421503609a9SYuri Pankov# In Oaxaca, the 55.000 teachers from the Section 22 of the National 2422503609a9SYuri Pankov# Syndicate of Education Workers, refuse to apply daylight saving each 2423503609a9SYuri Pankov# year, so that the more than 10,000 schools work at normal hour the 2424503609a9SYuri Pankov# whole year. 2425503609a9SYuri Pankov 2426503609a9SYuri Pankov# From Gwillim Law (2001-01-19): 2427503609a9SYuri Pankov# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 2428503609a9SYuri Pankov# (translated):... 2429503609a9SYuri Pankov# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 2430503609a9SYuri Pankov# that Summer Time will be reduced from seven to five months, starting 2431503609a9SYuri Pankov# this year.... 2432503609a9SYuri Pankov# http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001 2433503609a9SYuri Pankov# [translated], says "summer time will ... take effect on the first Sunday 2434503609a9SYuri Pankov# in May, and end on the last Sunday of September. 2435503609a9SYuri Pankov 2436503609a9SYuri Pankov# From Arthur David Olson (2001-01-25): 2437503609a9SYuri Pankov# The 2001-01-24 traditional Washington Post contained the page one 2438503609a9SYuri Pankov# story "Timely Issue Divides Mexicans."... 2439503609a9SYuri Pankov# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 2440503609a9SYuri Pankov# ... Mexico City Mayor López Obrador "...is threatening to keep 2441503609a9SYuri Pankov# Mexico City and its 20 million residents on a different time than 2442503609a9SYuri Pankov# the rest of the country..." In particular, López Obrador would abolish 2443503609a9SYuri Pankov# observation of Daylight Saving Time. 2444503609a9SYuri Pankov 2445503609a9SYuri Pankov# Official statute published by the Energy Department 2446503609a9SYuri Pankov# http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre 2447503609a9SYuri Pankov# (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 2448503609a9SYuri Pankov# and Sonora with no DST. This was reported by Jesper Nørgaard (2001-02-03). 2449503609a9SYuri Pankov 2450503609a9SYuri Pankov# From Paul Eggert (2001-03-03): 2451503609a9SYuri Pankov# 2452374df668SAndy Fiddaman# https://www.latimes.com/archives/la-xpm-2001-mar-03-mn-32561-story.html 2453503609a9SYuri Pankov# James F. Smith writes in today's LA Times 2454503609a9SYuri Pankov# * Sonora will continue to observe standard time. 2455503609a9SYuri Pankov# * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that 2456503609a9SYuri Pankov# the Federal District will not adopt DST. 2457503609a9SYuri Pankov# * 4 of 16 district leaders announced they'll ignore the decree. 2458503609a9SYuri Pankov# * The decree does not affect federal-controlled facilities including 2459503609a9SYuri Pankov# the airport, banks, hospitals, and schools. 2460503609a9SYuri Pankov# 2461503609a9SYuri Pankov# For now we'll assume that the Federal District will bow to federal rules. 2462503609a9SYuri Pankov 2463503609a9SYuri Pankov# From Jesper Nørgaard (2001-04-01): 2464503609a9SYuri Pankov# I found some references to the Mexican application of daylight 2465503609a9SYuri Pankov# saving, which modifies what I had already sent you, stating earlier 2466503609a9SYuri Pankov# that a number of northern Mexican states would go on daylight 2467503609a9SYuri Pankov# saving. The modification reverts this to only cover Baja California 2468503609a9SYuri Pankov# (Norte), while all other states (except Sonora, who has no daylight 2469503609a9SYuri Pankov# saving all year) will follow the original decree of president 2470503609a9SYuri Pankov# Vicente Fox, starting daylight saving May 6, 2001 and ending 2471503609a9SYuri Pankov# September 30, 2001. 2472503609a9SYuri Pankov# References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp> 2473503609a9SYuri Pankov# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 2474503609a9SYuri Pankov 2475503609a9SYuri Pankov# From Reuters (2001-09-04): 2476503609a9SYuri Pankov# Mexico's Supreme Court on Tuesday declared that daylight savings was 2477503609a9SYuri Pankov# unconstitutional in Mexico City, creating the possibility the 2478503609a9SYuri Pankov# capital will be in a different time zone from the rest of the nation 2479503609a9SYuri Pankov# next year.... The Supreme Court's ruling takes effect at 2:00 2480503609a9SYuri Pankov# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 2481503609a9SYuri Pankov# standard time. "This is so residents of the Federal District are not 2482503609a9SYuri Pankov# subject to unexpected time changes," a statement from the court said. 2483503609a9SYuri Pankov 2484503609a9SYuri Pankov# From Jesper Nørgaard Welen (2002-03-12): 2485503609a9SYuri Pankov# ... consulting my local grocery store(!) and my coworkers, they all insisted 2486503609a9SYuri Pankov# that a new decision had been made to reinstate US style DST in Mexico.... 2487503609a9SYuri Pankov# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 2488503609a9SYuri Pankov# confirms this. Sonora as usual is the only state where DST is not applied. 2489503609a9SYuri Pankov 2490503609a9SYuri Pankov# From Steffen Thorsen (2009-12-28): 2491503609a9SYuri Pankov# 2492503609a9SYuri Pankov# Steffen Thorsen wrote: 2493503609a9SYuri Pankov# > Mexico's House of Representatives has approved a proposal for northern 2494503609a9SYuri Pankov# > Mexico's border cities to share the same daylight saving schedule as 2495503609a9SYuri Pankov# > the United States. 2496503609a9SYuri Pankov# Now this has passed both the Congress and the Senate, so starting from 2497503609a9SYuri Pankov# 2010, some border regions will be the same: 2498503609a9SYuri Pankov# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ 2499503609a9SYuri Pankov# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 2500503609a9SYuri Pankov# (Spanish) 2501503609a9SYuri Pankov# 2502503609a9SYuri Pankov# Could not find the new law text, but the proposed law text changes are here: 2503503609a9SYuri Pankov# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf 2504503609a9SYuri Pankov# (Gaceta Parlamentaria) 2505503609a9SYuri Pankov# 2506503609a9SYuri Pankov# There is also a list of the votes here: 2507503609a9SYuri Pankov# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html 2508503609a9SYuri Pankov# 2509503609a9SYuri Pankov# Our page: 2510b654b02dSYuri Pankov# https://www.timeanddate.com/news/time/north-mexico-dst-change.html 2511503609a9SYuri Pankov 2512503609a9SYuri Pankov# From Arthur David Olson (2010-01-20): 2513503609a9SYuri Pankov# The page 2514503609a9SYuri Pankov# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2515503609a9SYuri Pankov# includes this text: 2516503609a9SYuri Pankov# En los municipios fronterizos de Tijuana y Mexicali en Baja California; 2517503609a9SYuri Pankov# Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; 2518503609a9SYuri Pankov# Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en 2519503609a9SYuri Pankov# Tamaulipas, la aplicación de este horario estacional surtirá efecto 2520503609a9SYuri Pankov# desde las dos horas del segundo domingo de marzo y concluirá a las dos 2521503609a9SYuri Pankov# horas del primer domingo de noviembre. 2522503609a9SYuri Pankov# En los municipios fronterizos que se encuentren ubicados en la franja 2523503609a9SYuri Pankov# fronteriza norte en el territorio comprendido entre la línea 2524503609a9SYuri Pankov# internacional y la línea paralela ubicada a una distancia de veinte 2525503609a9SYuri Pankov# kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el 2526503609a9SYuri Pankov# interior del país, la aplicación de este horario estacional surtirá 2527503609a9SYuri Pankov# efecto desde las dos horas del segundo domingo de marzo y concluirá a 2528503609a9SYuri Pankov# las dos horas del primer domingo de noviembre. 2529503609a9SYuri Pankov 2530503609a9SYuri Pankov# From Steffen Thorsen (2014-12-08), translated by Gwillim Law: 2531503609a9SYuri Pankov# The Mexican state of Quintana Roo will likely change to EST in 2015. 2532503609a9SYuri Pankov# 2533503609a9SYuri Pankov# http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo 2534503609a9SYuri Pankov# "With this change, the time conflict that has existed between the municipios 2535503609a9SYuri Pankov# of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an 2536503609a9SYuri Pankov# end. The latter declared itself in rebellion 15 years ago when a time change 2537503609a9SYuri Pankov# was initiated in Mexico, and since then it has refused to change its time 2538503609a9SYuri Pankov# zone along with the rest of the country." 2539503609a9SYuri Pankov# 2540503609a9SYuri Pankov# From Steffen Thorsen (2015-01-14), translated by Gwillim Law: 2541503609a9SYuri Pankov# http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html 2542503609a9SYuri Pankov# "...the new time zone will come into effect at two o'clock on the first Sunday 2543503609a9SYuri Pankov# of February, when we will have to advance the clock one hour from its current 2544503609a9SYuri Pankov# time..." 2545503609a9SYuri Pankov# Also, the new zone will not use DST. 2546503609a9SYuri Pankov# 2547503609a9SYuri Pankov# From Carlos Raúl Perasso (2015-02-02): 2548503609a9SYuri Pankov# The decree that modifies the Mexican Hour System Law has finally 2549503609a9SYuri Pankov# been published at the Diario Oficial de la Federación 2550503609a9SYuri Pankov# http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015 2551503609a9SYuri Pankov# It establishes 5 zones for Mexico: 2552503609a9SYuri Pankov# 1- Zona Centro (Central Zone): Corresponds to longitude 90 W, 2553503609a9SYuri Pankov# includes most of Mexico, excluding what's mentioned below. 2554503609a9SYuri Pankov# 2- Zona Pacífico (Pacific Zone): Longitude 105 W, includes the 2555503609a9SYuri Pankov# states of Baja California Sur; Chihuahua; Nayarit (excluding Bahía 2556503609a9SYuri Pankov# de Banderas which lies in Central Zone); Sinaloa and Sonora. 2557503609a9SYuri Pankov# 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the 2558503609a9SYuri Pankov# state of Baja California. 2559503609a9SYuri Pankov# 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state 2560503609a9SYuri Pankov# of Quintana Roo. 2561503609a9SYuri Pankov# 5- The islands, reefs and keys shall take their timezone from the 2562503609a9SYuri Pankov# longitude they are located at. 2563503609a9SYuri Pankov 2564f117aa50SRobert Mustacchi# From Paul Eggert (2022-10-28): 2565f117aa50SRobert Mustacchi# The new Mexican law was published today: 2566f117aa50SRobert Mustacchi# https://www.dof.gob.mx/nota_detalle.php?codigo=5670045&fecha=28/10/2022 2567f117aa50SRobert Mustacchi# This abolishes DST except where US DST rules are observed, 2568f117aa50SRobert Mustacchi# and in addition changes all of Chihuahua to -06 with no DST. 2569f117aa50SRobert Mustacchi 2570af2e290bSAndy Fiddaman# From Heitor David Pinto (2022-11-28): 2571af2e290bSAndy Fiddaman# Now the northern [municipios] want to have the same time zone as the 2572af2e290bSAndy Fiddaman# respective neighboring cities in the US, for example Juárez in UTC-7 with 2573af2e290bSAndy Fiddaman# DST, matching El Paso, and Ojinaga in UTC-6 with DST, matching Presidio.... 2574af2e290bSAndy Fiddaman# the president authorized the publication of the decree for November 29, 2575af2e290bSAndy Fiddaman# so the time change would occur on November 30 at 0:00. 2576af2e290bSAndy Fiddaman# http://puentelibre.mx/noticia/ciudad_juarez_cambio_horario_noviembre_2022/ 2577af2e290bSAndy Fiddaman 2578f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 2579f117aa50SRobert MustacchiRule Mexico 1931 only - May 1 23:00 1:00 D 2580f117aa50SRobert MustacchiRule Mexico 1931 only - Oct 1 0:00 0 S 2581503609a9SYuri PankovRule Mexico 1939 only - Feb 5 0:00 1:00 D 2582503609a9SYuri PankovRule Mexico 1939 only - Jun 25 0:00 0 S 2583503609a9SYuri PankovRule Mexico 1940 only - Dec 9 0:00 1:00 D 2584503609a9SYuri PankovRule Mexico 1941 only - Apr 1 0:00 0 S 2585503609a9SYuri PankovRule Mexico 1943 only - Dec 16 0:00 1:00 W # War 2586503609a9SYuri PankovRule Mexico 1944 only - May 1 0:00 0 S 2587503609a9SYuri PankovRule Mexico 1950 only - Feb 12 0:00 1:00 D 2588503609a9SYuri PankovRule Mexico 1950 only - Jul 30 0:00 0 S 2589503609a9SYuri PankovRule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 2590503609a9SYuri PankovRule Mexico 1996 2000 - Oct lastSun 2:00 0 S 2591503609a9SYuri PankovRule Mexico 2001 only - May Sun>=1 2:00 1:00 D 2592503609a9SYuri PankovRule Mexico 2001 only - Sep lastSun 2:00 0 S 2593f117aa50SRobert MustacchiRule Mexico 2002 2022 - Apr Sun>=1 2:00 1:00 D 2594f117aa50SRobert MustacchiRule Mexico 2002 2022 - Oct lastSun 2:00 0 S 2595374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 2596503609a9SYuri Pankov# Quintana Roo; represented by Cancún 2597f117aa50SRobert MustacchiZone America/Cancun -5:47:04 - LMT 1922 Jan 1 6:00u 2598503609a9SYuri Pankov -6:00 - CST 1981 Dec 23 2599503609a9SYuri Pankov -5:00 Mexico E%sT 1998 Aug 2 2:00 2600503609a9SYuri Pankov -6:00 Mexico C%sT 2015 Feb 1 2:00 2601503609a9SYuri Pankov -5:00 - EST 2602503609a9SYuri Pankov# Campeche, Yucatán; represented by Mérida 2603f117aa50SRobert MustacchiZone America/Merida -5:58:28 - LMT 1922 Jan 1 6:00u 2604503609a9SYuri Pankov -6:00 - CST 1981 Dec 23 2605503609a9SYuri Pankov -5:00 - EST 1982 Dec 2 2606503609a9SYuri Pankov -6:00 Mexico C%sT 2607503609a9SYuri Pankov# Coahuila, Nuevo León, Tamaulipas (near US border) 2608af2e290bSAndy Fiddaman# This includes the following municipios: 2609af2e290bSAndy Fiddaman# in Coahuila: Acuña, Allende, Guerrero, Hidalgo, Jiménez, Morelos, Nava, 2610af2e290bSAndy Fiddaman# Ocampo, Piedras Negras, Villa Unión, Zaragoza 2611af2e290bSAndy Fiddaman# in Nuevo León: Anáhuac 2612503609a9SYuri Pankov# in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo, 2613503609a9SYuri Pankov# Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso, Matamoros. 2614af2e290bSAndy Fiddaman# https://www.dof.gob.mx/nota_detalle.php?codigo=5670045&fecha=28/10/2022 2615f117aa50SRobert MustacchiZone America/Matamoros -6:30:00 - LMT 1922 Jan 1 6:00u 2616503609a9SYuri Pankov -6:00 - CST 1988 2617503609a9SYuri Pankov -6:00 US C%sT 1989 2618503609a9SYuri Pankov -6:00 Mexico C%sT 2010 2619503609a9SYuri Pankov -6:00 US C%sT 2620503609a9SYuri Pankov# Durango; Coahuila, Nuevo León, Tamaulipas (away from US border) 2621f117aa50SRobert MustacchiZone America/Monterrey -6:41:16 - LMT 1922 Jan 1 6:00u 2622503609a9SYuri Pankov -6:00 - CST 1988 2623503609a9SYuri Pankov -6:00 US C%sT 1989 2624503609a9SYuri Pankov -6:00 Mexico C%sT 2625503609a9SYuri Pankov# Central Mexico 2626f117aa50SRobert MustacchiZone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 7:00u 2627503609a9SYuri Pankov -7:00 - MST 1927 Jun 10 23:00 2628503609a9SYuri Pankov -6:00 - CST 1930 Nov 15 2629f117aa50SRobert Mustacchi -7:00 Mexico M%sT 1932 Apr 1 2630503609a9SYuri Pankov -6:00 Mexico C%sT 2001 Sep 30 2:00 2631503609a9SYuri Pankov -6:00 - CST 2002 Feb 20 2632503609a9SYuri Pankov -6:00 Mexico C%sT 2633af2e290bSAndy Fiddaman# Chihuahua (near US border - western side) 2634af2e290bSAndy Fiddaman# This includes the municipios of Janos, Ascensión, Juárez, Guadalupe, and 2635af2e290bSAndy Fiddaman# Práxedis G Guerrero. 2636af2e290bSAndy Fiddaman# http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf 2637af2e290bSAndy FiddamanZone America/Ciudad_Juarez -7:05:56 - LMT 1922 Jan 1 7:00u 2638af2e290bSAndy Fiddaman -7:00 - MST 1927 Jun 10 23:00 2639af2e290bSAndy Fiddaman -6:00 - CST 1930 Nov 15 2640af2e290bSAndy Fiddaman -7:00 Mexico M%sT 1932 Apr 1 2641af2e290bSAndy Fiddaman -6:00 - CST 1996 2642af2e290bSAndy Fiddaman -6:00 Mexico C%sT 1998 2643af2e290bSAndy Fiddaman -6:00 - CST 1998 Apr Sun>=1 3:00 2644af2e290bSAndy Fiddaman -7:00 Mexico M%sT 2010 2645af2e290bSAndy Fiddaman -7:00 US M%sT 2022 Oct 30 2:00 2646af2e290bSAndy Fiddaman -6:00 - CST 2022 Nov 30 0:00 2647af2e290bSAndy Fiddaman -7:00 US M%sT 2648af2e290bSAndy Fiddaman# Chihuahua (near US border - eastern side) 2649af2e290bSAndy Fiddaman# This includes the municipios of Coyame del Sotol, Ojinaga, and Manuel 2650af2e290bSAndy Fiddaman# Benavides. 2651af2e290bSAndy Fiddaman# http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf 2652f117aa50SRobert MustacchiZone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 7:00u 2653503609a9SYuri Pankov -7:00 - MST 1927 Jun 10 23:00 2654503609a9SYuri Pankov -6:00 - CST 1930 Nov 15 2655f117aa50SRobert Mustacchi -7:00 Mexico M%sT 1932 Apr 1 2656503609a9SYuri Pankov -6:00 - CST 1996 2657503609a9SYuri Pankov -6:00 Mexico C%sT 1998 2658503609a9SYuri Pankov -6:00 - CST 1998 Apr Sun>=1 3:00 2659503609a9SYuri Pankov -7:00 Mexico M%sT 2010 2660f117aa50SRobert Mustacchi -7:00 US M%sT 2022 Oct 30 2:00 2661af2e290bSAndy Fiddaman -6:00 - CST 2022 Nov 30 0:00 2662af2e290bSAndy Fiddaman -6:00 US C%sT 2663503609a9SYuri Pankov# Chihuahua (away from US border) 2664f117aa50SRobert MustacchiZone America/Chihuahua -7:04:20 - LMT 1922 Jan 1 7:00u 2665503609a9SYuri Pankov -7:00 - MST 1927 Jun 10 23:00 2666503609a9SYuri Pankov -6:00 - CST 1930 Nov 15 2667f117aa50SRobert Mustacchi -7:00 Mexico M%sT 1932 Apr 1 2668503609a9SYuri Pankov -6:00 - CST 1996 2669503609a9SYuri Pankov -6:00 Mexico C%sT 1998 2670503609a9SYuri Pankov -6:00 - CST 1998 Apr Sun>=1 3:00 2671f117aa50SRobert Mustacchi -7:00 Mexico M%sT 2022 Oct 30 2:00 2672f117aa50SRobert Mustacchi -6:00 - CST 2673503609a9SYuri Pankov# Sonora 2674f117aa50SRobert MustacchiZone America/Hermosillo -7:23:52 - LMT 1922 Jan 1 7:00u 2675503609a9SYuri Pankov -7:00 - MST 1927 Jun 10 23:00 2676503609a9SYuri Pankov -6:00 - CST 1930 Nov 15 2677f117aa50SRobert Mustacchi -7:00 Mexico M%sT 1932 Apr 1 2678503609a9SYuri Pankov -6:00 - CST 1942 Apr 24 2679503609a9SYuri Pankov -7:00 - MST 1949 Jan 14 2680503609a9SYuri Pankov -8:00 - PST 1970 2681503609a9SYuri Pankov -7:00 Mexico M%sT 1999 2682503609a9SYuri Pankov -7:00 - MST 2683503609a9SYuri Pankov 2684af2e290bSAndy Fiddaman# Baja California Sur, Nayarit (except Bahía de Banderas), Sinaloa 2685af2e290bSAndy FiddamanZone America/Mazatlan -7:05:40 - LMT 1922 Jan 1 7:00u 2686af2e290bSAndy Fiddaman -7:00 - MST 1927 Jun 10 23:00 2687af2e290bSAndy Fiddaman -6:00 - CST 1930 Nov 15 2688af2e290bSAndy Fiddaman -7:00 Mexico M%sT 1932 Apr 1 2689af2e290bSAndy Fiddaman -6:00 - CST 1942 Apr 24 2690af2e290bSAndy Fiddaman -7:00 - MST 1949 Jan 14 2691af2e290bSAndy Fiddaman -8:00 - PST 1970 2692af2e290bSAndy Fiddaman -7:00 Mexico M%sT 2693af2e290bSAndy Fiddaman 2694af2e290bSAndy Fiddaman# Bahía de Banderas 2695af2e290bSAndy Fiddaman 2696503609a9SYuri Pankov# From Alexander Krivenyshev (2010-04-21): 2697503609a9SYuri Pankov# According to news, Bahía de Banderas (Mexican state of Nayarit) 2698503609a9SYuri Pankov# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to 2699503609a9SYuri Pankov# share the same time zone as nearby city Puerto Vallarta, Jalisco). 2700503609a9SYuri Pankov# 2701503609a9SYuri Pankov# (Spanish) 2702503609a9SYuri Pankov# Bahía de Banderas homologa su horario al del centro del 2703503609a9SYuri Pankov# país, a partir de este domingo 2704503609a9SYuri Pankov# http://www.nayarit.gob.mx/notes.asp?id=20748 2705503609a9SYuri Pankov# 2706503609a9SYuri Pankov# Bahía de Banderas homologa su horario con el del Centro del 2707503609a9SYuri Pankov# País 2708503609a9SYuri Pankov# http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50 2709503609a9SYuri Pankov# 2710503609a9SYuri Pankov# (English) 2711503609a9SYuri Pankov# Puerto Vallarta and Bahía de Banderas: One Time Zone 2712503609a9SYuri Pankov# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml 2713503609a9SYuri Pankov# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html 2714503609a9SYuri Pankov# 2715503609a9SYuri Pankov# "Mexico's Senate approved the amendments to the Mexican Schedule System that 2716503609a9SYuri Pankov# will allow Bahía de Banderas and Puerto Vallarta to share the same time 2717503609a9SYuri Pankov# zone ..." 2718503609a9SYuri Pankov# Baja California Sur, Nayarit, Sinaloa 2719503609a9SYuri Pankov 2720503609a9SYuri Pankov# From Arthur David Olson (2010-05-01): 2721503609a9SYuri Pankov# Use "Bahia_Banderas" to keep the name to fourteen characters. 2722503609a9SYuri Pankov 2723f117aa50SRobert MustacchiZone America/Bahia_Banderas -7:01:00 - LMT 1922 Jan 1 7:00u 2724503609a9SYuri Pankov -7:00 - MST 1927 Jun 10 23:00 2725503609a9SYuri Pankov -6:00 - CST 1930 Nov 15 2726f117aa50SRobert Mustacchi -7:00 Mexico M%sT 1932 Apr 1 2727503609a9SYuri Pankov -6:00 - CST 1942 Apr 24 2728503609a9SYuri Pankov -7:00 - MST 1949 Jan 14 2729503609a9SYuri Pankov -8:00 - PST 1970 2730503609a9SYuri Pankov -7:00 Mexico M%sT 2010 Apr 4 2:00 2731503609a9SYuri Pankov -6:00 Mexico C%sT 2732503609a9SYuri Pankov 2733503609a9SYuri Pankov# Baja California 2734f117aa50SRobert MustacchiZone America/Tijuana -7:48:04 - LMT 1922 Jan 1 7:00u 2735503609a9SYuri Pankov -7:00 - MST 1924 2736503609a9SYuri Pankov -8:00 - PST 1927 Jun 10 23:00 2737503609a9SYuri Pankov -7:00 - MST 1930 Nov 15 2738503609a9SYuri Pankov -8:00 - PST 1931 Apr 1 2739503609a9SYuri Pankov -8:00 1:00 PDT 1931 Sep 30 2740503609a9SYuri Pankov -8:00 - PST 1942 Apr 24 2741503609a9SYuri Pankov -8:00 1:00 PWT 1945 Aug 14 23:00u 2742503609a9SYuri Pankov -8:00 1:00 PPT 1945 Nov 12 # Peace 2743503609a9SYuri Pankov -8:00 - PST 1948 Apr 5 2744503609a9SYuri Pankov -8:00 1:00 PDT 1949 Jan 14 2745503609a9SYuri Pankov -8:00 - PST 1954 2746503609a9SYuri Pankov -8:00 CA P%sT 1961 2747503609a9SYuri Pankov -8:00 - PST 1976 2748503609a9SYuri Pankov -8:00 US P%sT 1996 2749503609a9SYuri Pankov -8:00 Mexico P%sT 2001 2750503609a9SYuri Pankov -8:00 US P%sT 2002 Feb 20 2751503609a9SYuri Pankov -8:00 Mexico P%sT 2010 2752503609a9SYuri Pankov -8:00 US P%sT 2753503609a9SYuri Pankov# From Paul Eggert (2006-03-22): 2754503609a9SYuri Pankov# Formerly there was an America/Ensenada zone, which differed from 2755503609a9SYuri Pankov# America/Tijuana only in that it did not observe DST from 1976 2756503609a9SYuri Pankov# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say 2757503609a9SYuri Pankov# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports 2758503609a9SYuri Pankov# that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and 2759503609a9SYuri Pankov# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that 2760503609a9SYuri Pankov# DST-observance was a town-by-town matter back then. This concerns 2761503609a9SYuri Pankov# data after 1970 so most likely there should be at least one Zone 2762503609a9SYuri Pankov# other than America/Tijuana for Baja, but it's not clear yet what its 2763503609a9SYuri Pankov# name or contents should be. 2764503609a9SYuri Pankov# 2765503609a9SYuri Pankov# From Paul Eggert (2015-10-08): 2766503609a9SYuri Pankov# Formerly there was an America/Santa_Isabel zone, but this appears to 2767503609a9SYuri Pankov# have come from a misreading of 2768503609a9SYuri Pankov# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 2769503609a9SYuri Pankov# It has been moved to the 'backward' file. 2770503609a9SYuri Pankov# 2771f117aa50SRobert Mustacchi# From Paul Eggert (2022-10-28): 2772f117aa50SRobert Mustacchi# Today's new law states that the entire state of Baja California 2773f117aa50SRobert Mustacchi# follows US DST rules, which agrees with simplifications noted above. 2774f117aa50SRobert Mustacchi# 2775503609a9SYuri Pankov# 2776503609a9SYuri Pankov# Revillagigedo Is 2777503609a9SYuri Pankov# no information 2778503609a9SYuri Pankov 2779503609a9SYuri Pankov############################################################################### 2780503609a9SYuri Pankov 2781503609a9SYuri Pankov# Barbados 2782503609a9SYuri Pankov 2783427b4c5cSAndy Fiddaman# For 1899 Milne gives -3:58:29.2. 2784503609a9SYuri Pankov 278506965442SAndy Fiddaman# From P Chan (2020-12-09 and 2020-12-11): 278606965442SAndy Fiddaman# Standard time of GMT-4 was adopted in 1911. 278706965442SAndy Fiddaman# Definition of Time Act, 1911 (1911-7) [1911-08-28] 278806965442SAndy Fiddaman# 1912, Laws of Barbados (5 v.), OCLC Number: 919801291, Vol. 4, Image No. 522 278906965442SAndy Fiddaman# 1944, Laws of Barbados (5 v.), OCLC Number: 84548697, Vol. 4, Image No. 122 279006965442SAndy Fiddaman# http://llmc.com/browse.aspx?type=2&coll=85&div=297 279106965442SAndy Fiddaman# 279206965442SAndy Fiddaman# DST was observed in 1942-44. 279306965442SAndy Fiddaman# Defence (Daylight Saving) Regulations, 1942, 1942-04-13 279406965442SAndy Fiddaman# Defence (Daylight Saving) (Repeal) Regulations, 1942, 1942-08-22 279506965442SAndy Fiddaman# Defence (Daylight Saving) Regulations, 1943, 1943-04-16 279606965442SAndy Fiddaman# Defence (Daylight Saving) (Repeal) Regulations, 1943, 1943-09-01 279706965442SAndy Fiddaman# Defence (Daylight Saving) Regulations, 1944, 1944-03-21 279806965442SAndy Fiddaman# [Defence (Daylight Saving) (Amendment) Regulations 1944, 1944-03-28] 279906965442SAndy Fiddaman# Defence (Daylight Saving) (Repeal) Regulations, 1944, 1944-08-30 280006965442SAndy Fiddaman# 280106965442SAndy Fiddaman# 1914-, Subsidiary Legis., Annual Vols. OCLC Number: 226290591 280206965442SAndy Fiddaman# 1942: Image Nos. 527-528, 555-556 280306965442SAndy Fiddaman# 1943: Image Nos. 178-179, 198 280406965442SAndy Fiddaman# 1944: Image Nos. 113-115, 129 280506965442SAndy Fiddaman# http://llmc.com/titledescfull.aspx?type=2&coll=85&div=297&set=98437 280606965442SAndy Fiddaman# 280706965442SAndy Fiddaman# From Tim Parenti (2021-02-20): 280806965442SAndy Fiddaman# The transitions below are derived from P Chan's sources, except that the 1977 280906965442SAndy Fiddaman# through 1980 transitions are from Shanks & Pottenger since we have no better 281006965442SAndy Fiddaman# data there. Of particular note, the 1944 DST regulation only advanced the 281106965442SAndy Fiddaman# time to "exactly three and a half hours later than Greenwich mean time", as 281206965442SAndy Fiddaman# opposed to "three hours" in the 1942 and 1943 regulations. 281306965442SAndy Fiddaman 2814f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 281506965442SAndy FiddamanRule Barb 1942 only - Apr 19 5:00u 1:00 D 281606965442SAndy FiddamanRule Barb 1942 only - Aug 31 6:00u 0 S 281706965442SAndy FiddamanRule Barb 1943 only - May 2 5:00u 1:00 D 281806965442SAndy FiddamanRule Barb 1943 only - Sep 5 6:00u 0 S 281906965442SAndy FiddamanRule Barb 1944 only - Apr 10 5:00u 0:30 - 282006965442SAndy FiddamanRule Barb 1944 only - Sep 10 6:00u 0 S 2821503609a9SYuri PankovRule Barb 1977 only - Jun 12 2:00 1:00 D 2822503609a9SYuri PankovRule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 2823503609a9SYuri PankovRule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 2824503609a9SYuri PankovRule Barb 1979 only - Sep 30 2:00 0 S 2825503609a9SYuri PankovRule Barb 1980 only - Sep 25 2:00 0 S 2826374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 2827427b4c5cSAndy Fiddaman #STDOFF -3:58:29.2 282806965442SAndy FiddamanZone America/Barbados -3:58:29 - LMT 1911 Aug 28 # Bridgetown 282906965442SAndy Fiddaman -4:00 Barb A%sT 1944 283006965442SAndy Fiddaman -4:00 Barb AST/-0330 1945 2831503609a9SYuri Pankov -4:00 Barb A%sT 2832503609a9SYuri Pankov 2833503609a9SYuri Pankov# Belize 2834f915e6d3SRobert Mustacchi 2835f915e6d3SRobert Mustacchi# From P Chan (2020-11-03): 2836f915e6d3SRobert Mustacchi# Below are some laws related to the time in British Honduras/Belize: 2837f915e6d3SRobert Mustacchi# 2838f915e6d3SRobert Mustacchi# Definition of Time Ordinance, 1927 (No.4 of 1927) [1927-04-01] 2839f915e6d3SRobert Mustacchi# Ordinances of British Honduras Passed in the Year 1927, p 19-20 2840f915e6d3SRobert Mustacchi# https://books.google.com/books?id=LqEpAQAAMAAJ&pg=RA3-PA19 2841f915e6d3SRobert Mustacchi# 2842f915e6d3SRobert Mustacchi# Definition of Time (Amendment) Ordinance, 1942 (No. 5 of 1942) [1942-06-27] 2843f915e6d3SRobert Mustacchi# Ordinances of British Honduras Passed in the Year 1942, p 31-32 2844f915e6d3SRobert Mustacchi# https://books.google.com/books?id=h6MpAQAAMAAJ&pg=RA6-PA95-IA44 2845f915e6d3SRobert Mustacchi# 2846f915e6d3SRobert Mustacchi# Definition of Time Ordinance, 1945 (No. 19 of 1945) [1945-12-15] 2847f915e6d3SRobert Mustacchi# Ordinances of British Honduras Passed in the Year 1945, p 49-50 2848f915e6d3SRobert Mustacchi# https://books.google.com/books?id=xaMpAQAAMAAJ&pg=RA2-PP1 2849f915e6d3SRobert Mustacchi# 2850f915e6d3SRobert Mustacchi# Definition of Time Ordinance, 1947 (No. 1 of 1947) [1947-03-11] 2851f915e6d3SRobert Mustacchi# Ordinances of British Honduras Passed in the Year 1947, p 1-2 2852f915e6d3SRobert Mustacchi# https://books.google.com/books?id=xaMpAQAAMAAJ&pg=RA3-PA1 2853f915e6d3SRobert Mustacchi# 2854f915e6d3SRobert Mustacchi# Time (Definition of) Ordinance (Chapter 180) 2855f915e6d3SRobert Mustacchi# The Laws of British Honduras in Force on the 15th Day of September, 1958 , Volume IV, p 2580 2856f915e6d3SRobert Mustacchi# https://books.google.com/books?id=v5QpAQAAMAAJ&pg=PA2580 2857f915e6d3SRobert Mustacchi# 2858f915e6d3SRobert Mustacchi# Time (Definition of) (Amendment) Ordinance, 1968 (No. 13 of 1968) [1968-08-03] 2859f915e6d3SRobert Mustacchi# https://books.google.com/books?id=xij7KEB_58wC&pg=RA1-PA428-IA9 2860f915e6d3SRobert Mustacchi# 2861f915e6d3SRobert Mustacchi# Definition of Time Act (Chapter 339) 2862f915e6d3SRobert Mustacchi# Law of Belize, Revised Edition 2000 2863f915e6d3SRobert Mustacchi# http://www.belizelaw.org/web/lawadmin/PDF%20files/cap339.pdf 2864f915e6d3SRobert Mustacchi 2865f915e6d3SRobert Mustacchi# From Paul Eggert (2020-11-03): 2866f915e6d3SRobert Mustacchi# The transitions below are derived from P Chan's sources, except that the 2867f915e6d3SRobert Mustacchi# 1973 through 1983 transitions are from Shanks & Pottenger since we have 2868f915e6d3SRobert Mustacchi# no better data there. 2869f915e6d3SRobert Mustacchi 2870f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 2871f915e6d3SRobert MustacchiRule Belize 1918 1941 - Oct Sat>=1 24:00 0:30 -0530 2872f915e6d3SRobert MustacchiRule Belize 1919 1942 - Feb Sat>=8 24:00 0 CST 2873f915e6d3SRobert MustacchiRule Belize 1942 only - Jun 27 24:00 1:00 CWT 2874f915e6d3SRobert MustacchiRule Belize 1945 only - Aug 14 23:00u 1:00 CPT 2875f915e6d3SRobert MustacchiRule Belize 1945 only - Dec 15 24:00 0 CST 2876f915e6d3SRobert MustacchiRule Belize 1947 1967 - Oct Sat>=1 24:00 0:30 -0530 2877f915e6d3SRobert MustacchiRule Belize 1948 1968 - Feb Sat>=8 24:00 0 CST 2878dafc4501SDan McDonaldRule Belize 1973 only - Dec 5 0:00 1:00 CDT 2879dafc4501SDan McDonaldRule Belize 1974 only - Feb 9 0:00 0 CST 2880dafc4501SDan McDonaldRule Belize 1982 only - Dec 18 0:00 1:00 CDT 2881dafc4501SDan McDonaldRule Belize 1983 only - Feb 12 0:00 0 CST 2882374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 2883f915e6d3SRobert MustacchiZone America/Belize -5:52:48 - LMT 1912 Apr 1 2884dafc4501SDan McDonald -6:00 Belize %s 2885503609a9SYuri Pankov 2886503609a9SYuri Pankov# Bermuda 2887503609a9SYuri Pankov 2888427b4c5cSAndy Fiddaman# From Paul Eggert (2022-07-27): 2889503609a9SYuri Pankov# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, 2890f915e6d3SRobert Mustacchi# Bermuda dockyard, Ireland I. This agrees with standard offset given in the 2891427b4c5cSAndy Fiddaman# Daylight Saving Act, 1917 cited below. 2892f915e6d3SRobert Mustacchi# It is not known when this time became standard for Bermuda; guess 1890. 2893f915e6d3SRobert Mustacchi# The transition to -04 was specified by: 2894f915e6d3SRobert Mustacchi# 1930: The Time Zone Act, 1929 (1929: No. 39) [1929-11-08] 2895f915e6d3SRobert Mustacchi# https://books.google.com/books?id=7tdMAQAAIAAJ&pg=RA54-PP1 2896f915e6d3SRobert Mustacchi 2897f915e6d3SRobert Mustacchi# From P Chan (2020-11-20): 2898f915e6d3SRobert Mustacchi# Most of the information can be found online from the Bermuda National 2899f915e6d3SRobert Mustacchi# Library - Digital Collection which includes The Royal Gazette (RG) until 1957 2900f915e6d3SRobert Mustacchi# https://bnl.contentdm.oclc.org/digital/ 2901f915e6d3SRobert Mustacchi# I will cite the ID. For example, [10000] means 2902f915e6d3SRobert Mustacchi# https://bnl.contentdm.oclc.org/digital/collection/BermudaNP02/id/10000 2903f915e6d3SRobert Mustacchi# 2904f915e6d3SRobert Mustacchi# 1917: Apr 5 midnight to Sep 30 midnight 2905f915e6d3SRobert Mustacchi# Daylight Saving Act, 1917 (1917 No. 13) [1917-04-02] 2906f915e6d3SRobert Mustacchi# Bermuda Acts and Resolves 1917, p 37-38 2907f915e6d3SRobert Mustacchi# https://books.google.com/books?id=M-lCAQAAMAAJ&pg=PA36-IA2 2908f915e6d3SRobert Mustacchi# RG, 1917-04-04, p 6 [42340] gives the spring forward date. 2909f915e6d3SRobert Mustacchi# 2910f915e6d3SRobert Mustacchi# 1918: Apr 13 midnight to Sep 15 midnight 2911f915e6d3SRobert Mustacchi# Daylight Saving Act, 1918 (1918 No. 9) [1918-04-06] 2912f915e6d3SRobert Mustacchi# Bermuda Acts and Resolves 1917, p 13 2913f915e6d3SRobert Mustacchi# https://books.google.com/books?id=K-lCAQAAMAAJ&pg=RA1-PA7 2914f915e6d3SRobert Mustacchi# 2915f915e6d3SRobert Mustacchi# Note that local mean time was still used before 1930. 2916f915e6d3SRobert Mustacchi# 2917f915e6d3SRobert Mustacchi# During WWII, DST was introduced by Defence Regulations 2918f915e6d3SRobert Mustacchi# 1942: Jan 11 02:00 to Oct 18 02:00 [113646], [115726] 2919f915e6d3SRobert Mustacchi# 1943: Mar 21 02:00 to Oct 31 02:00 [116704], [118193] 2920f915e6d3SRobert Mustacchi# 1944: Mar 12 02:00 to Nov 5 02:00 [119225], [121593] 2921f915e6d3SRobert Mustacchi# 1945: Mar 11 02:00 to Nov 4 02:00 [122369], [124461] 2922f915e6d3SRobert Mustacchi# RG, 1942-01-08, p 2, 1942-10-12, p 2 , 1943-03-06, p 2, 1943-09-03, p 1, 2923f915e6d3SRobert Mustacchi# 1944-02-29, p 6, 1944-09-20, p 2, 1945-02-13, p 2, 1945-11-03, p 1 2924f915e6d3SRobert Mustacchi# 2925f915e6d3SRobert Mustacchi# In 1946, the House of Assembly rejected DST twice. [128686], [128076] 2926f915e6d3SRobert Mustacchi# RG, 1946-03-16 p 1,1946-04-13 p 1 2927f915e6d3SRobert Mustacchi# 2928f915e6d3SRobert Mustacchi# 1947: third Sunday in May 02:00 to second Sunday in September 02:00 2929f915e6d3SRobert Mustacchi# DST in 1947 was defined in the Daylight Saving Act, 1947 (1947: No. 12) 2930f915e6d3SRobert Mustacchi# which expired at the end of the year. [125784] ,[132405], [144454], [138226] 2931f915e6d3SRobert Mustacchi# RG, 1947-02-27, p 1, 1947-05-15, p 1, 1947-09-13, p 1, 1947-12-30, p 1 2932f915e6d3SRobert Mustacchi# 2933f915e6d3SRobert Mustacchi# 1948-1952: fourth Sunday in May 02:00 to first Sunday in September 02:00 2934f915e6d3SRobert Mustacchi# DST in 1948 was defined in the Daylight Saving Act, 1948 (1948 : No. 12) 2935f915e6d3SRobert Mustacchi# which was set to expired at the end of the year but it was extended until 2936f915e6d3SRobert Mustacchi# the end of 1952 and was not further extended. 2937f915e6d3SRobert Mustacchi# [129802], [139403], [146008], [135240], [144330], [139049], [143309], 2938f915e6d3SRobert Mustacchi# [148271], [149773], [153589], [153802], [155924] 2939f915e6d3SRobert Mustacchi# RG, 1948-04-13, p 1, 1948-05-22, p 1, 1948-09-04, p 1, 1949-05-21, p1, 2940f915e6d3SRobert Mustacchi# 1949-09-03, p 1, 1950-05-27 p 1, 1950-09-02, p 1, 1951-05-27, p 1, 2941f915e6d3SRobert Mustacchi# 1951-09-01, p 1, 1952-05-23, p 1, 1952-09-26, p 1, 1952-12-21, p 8 2942f915e6d3SRobert Mustacchi# 2943f915e6d3SRobert Mustacchi# In 1953-1955, the House of Assembly rejected DST each year. [158996], 2944f915e6d3SRobert Mustacchi# [162620], [166720] RG, 1953-05-02, p 1, 1954-04-01 p 1, 1955-03-12, p 1 2945f915e6d3SRobert Mustacchi# 2946f915e6d3SRobert Mustacchi# 1956: fourth Sunday in May 02:00 to last Sunday in October 02:00 2947f915e6d3SRobert Mustacchi# Time Zone (Seasonal Variation) Act, 1956 (1956: No.44) [1956-05-25] 2948f915e6d3SRobert Mustacchi# Bermuda Public Acts 1956, p 331-332 2949f915e6d3SRobert Mustacchi# https://books.google.com/books?id=Xs1AlmD_cEwC&pg=PA63 2950f915e6d3SRobert Mustacchi# 2951f915e6d3SRobert Mustacchi# The extension of the Act was rejected by the House of Assembly. [176218] 2952f915e6d3SRobert Mustacchi# RG, 1956-12-13, p 1 2953f915e6d3SRobert Mustacchi# 2954f915e6d3SRobert Mustacchi# From the Chronological Table of Public and Private Acts up to 1985, it seems 2955f915e6d3SRobert Mustacchi# that there does not exist other Acts related to DST before 1973. 2956f915e6d3SRobert Mustacchi# https://books.google.com/books?id=r9hMAQAAIAAJ&pg=RA23-PA1 2957f915e6d3SRobert Mustacchi# Public Acts of the Legislature of the Islands of Bermuda, Together with 2958f915e6d3SRobert Mustacchi# Statutory Instruments in Force Thereunder, Vol VII 2959503609a9SYuri Pankov 2960503609a9SYuri Pankov# From Dan Jones, reporting in The Royal Gazette (2006-06-26): 2961503609a9SYuri Pankov# Next year, however, clocks in the US will go forward on the second Sunday 2962503609a9SYuri Pankov# in March, until the first Sunday in November. And, after the Time Zone 2963503609a9SYuri Pankov# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on 2964503609a9SYuri Pankov# Friday, the same thing will happen in Bermuda. 2965503609a9SYuri Pankov# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 2966503609a9SYuri Pankov 2967f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 2968f915e6d3SRobert MustacchiRule Bermuda 1917 only - Apr 5 24:00 1:00 - 2969f915e6d3SRobert MustacchiRule Bermuda 1917 only - Sep 30 24:00 0 - 2970f915e6d3SRobert MustacchiRule Bermuda 1918 only - Apr 13 24:00 1:00 - 2971f915e6d3SRobert MustacchiRule Bermuda 1918 only - Sep 15 24:00 0 S 2972f915e6d3SRobert MustacchiRule Bermuda 1942 only - Jan 11 2:00 1:00 D 2973f915e6d3SRobert MustacchiRule Bermuda 1942 only - Oct 18 2:00 0 S 2974f915e6d3SRobert MustacchiRule Bermuda 1943 only - Mar 21 2:00 1:00 D 2975f915e6d3SRobert MustacchiRule Bermuda 1943 only - Oct 31 2:00 0 S 2976f915e6d3SRobert MustacchiRule Bermuda 1944 1945 - Mar Sun>=8 2:00 1:00 D 2977f915e6d3SRobert MustacchiRule Bermuda 1944 1945 - Nov Sun>=1 2:00 0 S 2978f915e6d3SRobert MustacchiRule Bermuda 1947 only - May Sun>=15 2:00 1:00 D 2979f915e6d3SRobert MustacchiRule Bermuda 1947 only - Sep Sun>=8 2:00 0 S 2980f915e6d3SRobert MustacchiRule Bermuda 1948 1952 - May Sun>=22 2:00 1:00 D 2981f915e6d3SRobert MustacchiRule Bermuda 1948 1952 - Sep Sun>=1 2:00 0 S 2982f915e6d3SRobert MustacchiRule Bermuda 1956 only - May Sun>=22 2:00 1:00 D 2983f915e6d3SRobert MustacchiRule Bermuda 1956 only - Oct lastSun 2:00 0 S 2984f915e6d3SRobert Mustacchi 2985374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 2986427b4c5cSAndy Fiddaman #STDOFF -4:19:18.3 2987f915e6d3SRobert MustacchiZone Atlantic/Bermuda -4:19:18 - LMT 1890 # Hamilton 2988f915e6d3SRobert Mustacchi -4:19:18 Bermuda BMT/BST 1930 Jan 1 2:00 2989f915e6d3SRobert Mustacchi -4:00 Bermuda A%sT 1974 Apr 28 2:00 2990503609a9SYuri Pankov -4:00 Canada A%sT 1976 2991503609a9SYuri Pankov -4:00 US A%sT 2992503609a9SYuri Pankov 2993503609a9SYuri Pankov# Costa Rica 2994503609a9SYuri Pankov 2995427b4c5cSAndy Fiddaman# Milne gives -5:36:13.3 as San José mean time. 2996503609a9SYuri Pankov 2997f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 2998503609a9SYuri PankovRule CR 1979 1980 - Feb lastSun 0:00 1:00 D 2999503609a9SYuri PankovRule CR 1979 1980 - Jun Sun>=1 0:00 0 S 3000503609a9SYuri PankovRule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 3001503609a9SYuri Pankov# IATA SSIM (1991-09) says the following was at 1:00; 3002503609a9SYuri Pankov# go with Shanks & Pottenger. 3003503609a9SYuri PankovRule CR 1991 only - Jul 1 0:00 0 S 3004503609a9SYuri PankovRule CR 1992 only - Mar 15 0:00 0 S 3005503609a9SYuri Pankov# There are too many San Josés elsewhere, so we'll use 'Costa Rica'. 3006374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 3007427b4c5cSAndy Fiddaman #STDOFF -5:36:13.3 3008503609a9SYuri PankovZone America/Costa_Rica -5:36:13 - LMT 1890 # San José 3009503609a9SYuri Pankov -5:36:13 - SJMT 1921 Jan 15 # San José Mean Time 3010503609a9SYuri Pankov -6:00 CR C%sT 3011503609a9SYuri Pankov# Coco 3012503609a9SYuri Pankov# no information; probably like America/Costa_Rica 3013503609a9SYuri Pankov 3014503609a9SYuri Pankov# Cuba 3015503609a9SYuri Pankov 3016503609a9SYuri Pankov# From Paul Eggert (2013-02-21): 3017503609a9SYuri Pankov# Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 3018503609a9SYuri Pankov# for the port, and -5:30 for meteorological observations. 3019503609a9SYuri Pankov# For now, stick with Shanks & Pottenger. 3020503609a9SYuri Pankov 3021503609a9SYuri Pankov# From Arthur David Olson (1999-03-29): 3022503609a9SYuri Pankov# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 3023503609a9SYuri Pankov# the Cuban National Team and the Baltimore Orioles was carried live on 3024503609a9SYuri Pankov# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 3025503609a9SYuri Pankov# During the game, play-by-play announcer Jim Hunter noted that 3026503609a9SYuri Pankov# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 3027503609a9SYuri Pankov# Time today." (The "two hour" remark referred to losing one hour of 3028503609a9SYuri Pankov# sleep on 1999-03-28 - when the announcers were in Cuba as it switched 3029503609a9SYuri Pankov# to DST - and one more hour on 1999-04-04 - when the announcers will have 3030503609a9SYuri Pankov# returned to Baltimore, which switches on that date.) 3031503609a9SYuri Pankov 3032503609a9SYuri Pankov# From Steffen Thorsen (2013-11-11): 3033503609a9SYuri Pankov# DST start in Cuba in 2004 ... does not follow the same rules as the 3034503609a9SYuri Pankov# years before. The correct date should be Sunday 2004-03-28 00:00 ... 3035503609a9SYuri Pankov# https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html 3036503609a9SYuri Pankov 3037503609a9SYuri Pankov# From Evert van der Veer via Steffen Thorsen (2004-10-28): 3038503609a9SYuri Pankov# Cuba is not going back to standard time this year. 3039503609a9SYuri Pankov# From Paul Eggert (2006-03-22): 3040503609a9SYuri Pankov# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 3041503609a9SYuri Pankov# says that it's due to a problem at the Antonio Guiteras 3042503609a9SYuri Pankov# thermoelectric plant, and says "This October there will be no return 3043503609a9SYuri Pankov# to normal hours (after daylight saving time)". 3044503609a9SYuri Pankov# For now, let's assume that it's a temporary measure. 3045503609a9SYuri Pankov 3046503609a9SYuri Pankov# From Carlos A. Carnero Delgado (2005-11-12): 3047503609a9SYuri Pankov# This year (just like in 2004-2005) there's no change in time zone 3048503609a9SYuri Pankov# adjustment in Cuba. We will stay in daylight saving time: 3049503609a9SYuri Pankov# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html 3050503609a9SYuri Pankov 3051503609a9SYuri Pankov# From Jesper Nørgaard Welen (2006-10-21): 3052503609a9SYuri Pankov# An article in GRANMA INTERNACIONAL claims that Cuba will end 3053503609a9SYuri Pankov# the 3 years of permanent DST next weekend, see 3054503609a9SYuri Pankov# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html 3055503609a9SYuri Pankov# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, 3056503609a9SYuri Pankov# watches should be set back one hour - going back to 00:00 hours - returning 3057503609a9SYuri Pankov# to the normal schedule.... 3058503609a9SYuri Pankov 3059503609a9SYuri Pankov# From Paul Eggert (2007-03-02): 3060503609a9SYuri Pankov# <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday, 3061503609a9SYuri Pankov# says Cuban clocks will advance at midnight on March 10. 3062503609a9SYuri Pankov# For lack of better information, assume Cuba will use US rules, 3063503609a9SYuri Pankov# except that it switches at midnight standard time as usual. 3064503609a9SYuri Pankov# 3065503609a9SYuri Pankov# From Steffen Thorsen (2007-10-25): 3066503609a9SYuri Pankov# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week 3067503609a9SYuri Pankov# earlier - on the last Sunday of October, just like in 2006. 3068503609a9SYuri Pankov# 3069503609a9SYuri Pankov# He supplied these references: 3070503609a9SYuri Pankov# 3071af2e290bSAndy Fiddaman# http://www.prensalatina.com.mx/article.asp?ID={4CC32C1B-A9F7-42FB-8A07-8631AFC923AF}&language=ES 3072503609a9SYuri Pankov# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm 3073503609a9SYuri Pankov# 3074503609a9SYuri Pankov# From Alex Krivenyshev (2007-10-25): 3075503609a9SYuri Pankov# Here is also article from Granma (Cuba): 3076503609a9SYuri Pankov# 3077503609a9SYuri Pankov# Regirá el Horario Normal desde el próximo domingo 28 de octubre 3078503609a9SYuri Pankov# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html 3079503609a9SYuri Pankov# 3080503609a9SYuri Pankov# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html 3081503609a9SYuri Pankov 3082503609a9SYuri Pankov# From Arthur David Olson (2008-03-09): 3083503609a9SYuri Pankov# I'm in Maryland which is now observing United States Eastern Daylight 3084503609a9SYuri Pankov# Time. At 9:44 local time I used RealPlayer to listen to 3085503609a9SYuri Pankov# http://media.enet.cu/radioreloj 3086503609a9SYuri Pankov# a Cuban information station, and heard 3087503609a9SYuri Pankov# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), 3088503609a9SYuri Pankov# indicating that Cuba is still on standard time. 3089503609a9SYuri Pankov 3090503609a9SYuri Pankov# From Steffen Thorsen (2008-03-12): 3091503609a9SYuri Pankov# It seems that Cuba will start DST on Sunday, 2007-03-16... 3092503609a9SYuri Pankov# It was announced yesterday, according to this source (in Spanish): 3093503609a9SYuri Pankov# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm 3094503609a9SYuri Pankov# 3095503609a9SYuri Pankov# Some more background information is posted here: 3096b654b02dSYuri Pankov# https://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html 3097503609a9SYuri Pankov# 3098503609a9SYuri Pankov# The article also says that Cuba has been observing DST since 1963, 3099503609a9SYuri Pankov# while Shanks (and tzdata) has 1965 as the first date (except in the 3100503609a9SYuri Pankov# 1940's). Many other web pages in Cuba also claim that it has been 3101503609a9SYuri Pankov# observed since 1963, but with the exception of 1970 - an exception 3102503609a9SYuri Pankov# which is not present in tzdata/Shanks. So there is a chance we need to 3103503609a9SYuri Pankov# change some historic records as well. 3104503609a9SYuri Pankov# 3105503609a9SYuri Pankov# One example: 3106503609a9SYuri Pankov# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm 3107503609a9SYuri Pankov 3108503609a9SYuri Pankov# From Jesper Nørgaard Welen (2008-03-13): 3109503609a9SYuri Pankov# The Cuban time change has just been confirmed on the most authoritative 3110503609a9SYuri Pankov# web site, the Granma. Please check out 3111503609a9SYuri Pankov# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html 3112503609a9SYuri Pankov# 3113503609a9SYuri Pankov# Basically as expected after Steffen Thorsen's information, the change 3114503609a9SYuri Pankov# will take place midnight between Saturday and Sunday. 3115503609a9SYuri Pankov 3116503609a9SYuri Pankov# From Arthur David Olson (2008-03-12): 3117503609a9SYuri Pankov# Assume Sun>=15 (third Sunday) going forward. 3118503609a9SYuri Pankov 3119503609a9SYuri Pankov# From Alexander Krivenyshev (2009-03-04) 3120503609a9SYuri Pankov# According to the Radio Reloj - Cuba will start Daylight Saving Time on 3121503609a9SYuri Pankov# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- 3122503609a9SYuri Pankov# not on midnight March 14 / March 15 as previously thought. 3123503609a9SYuri Pankov# 3124503609a9SYuri Pankov# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html 3125503609a9SYuri Pankov# (in Spanish) 3126503609a9SYuri Pankov 3127503609a9SYuri Pankov# From Arthur David Olson (2009-03-09) 3128503609a9SYuri Pankov# I listened over the Internet to 3129503609a9SYuri Pankov# http://media.enet.cu/readioreloj 3130503609a9SYuri Pankov# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the 3131503609a9SYuri Pankov# the time was announced as "diez cinco" - the same time as here, indicating 3132503609a9SYuri Pankov# that has indeed switched to DST. Assume second Sunday from 2009 forward. 3133503609a9SYuri Pankov 3134503609a9SYuri Pankov# From Steffen Thorsen (2011-03-08): 3135503609a9SYuri Pankov# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 3136503609a9SYuri Pankov# this year. Nothing about the end date known so far (if that has 3137503609a9SYuri Pankov# changed at all). 3138503609a9SYuri Pankov# 3139503609a9SYuri Pankov# Source: 3140503609a9SYuri Pankov# http://granma.co.cu/2011/03/08/nacional/artic01.html 3141503609a9SYuri Pankov# 3142503609a9SYuri Pankov# Our info: 3143b654b02dSYuri Pankov# https://www.timeanddate.com/news/time/cuba-starts-dst-2011.html 3144503609a9SYuri Pankov# 3145503609a9SYuri Pankov# From Steffen Thorsen (2011-10-30) 3146503609a9SYuri Pankov# Cuba will end DST two weeks later this year. Instead of going back 3147503609a9SYuri Pankov# tonight, it has been delayed to 2011-11-13 at 01:00. 3148503609a9SYuri Pankov# 3149503609a9SYuri Pankov# One source (Spanish) 3150503609a9SYuri Pankov# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html 3151503609a9SYuri Pankov# 3152503609a9SYuri Pankov# Our page: 3153b654b02dSYuri Pankov# https://www.timeanddate.com/news/time/cuba-time-changes-2011.html 3154503609a9SYuri Pankov# 3155503609a9SYuri Pankov# From Steffen Thorsen (2012-03-01) 3156503609a9SYuri Pankov# According to Radio Reloj, Cuba will start DST on Midnight between March 3157503609a9SYuri Pankov# 31 and April 1. 3158503609a9SYuri Pankov# 3159503609a9SYuri Pankov# Radio Reloj has the following info (Spanish): 3160503609a9SYuri Pankov# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril 3161503609a9SYuri Pankov# 3162503609a9SYuri Pankov# Our info on it: 3163b654b02dSYuri Pankov# https://www.timeanddate.com/news/time/cuba-starts-dst-2012.html 3164503609a9SYuri Pankov 3165503609a9SYuri Pankov# From Steffen Thorsen (2012-11-03): 3166503609a9SYuri Pankov# Radio Reloj and many other sources report that Cuba is changing back 3167503609a9SYuri Pankov# to standard time on 2012-11-04: 3168503609a9SYuri Pankov# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre 3169503609a9SYuri Pankov# From Paul Eggert (2012-11-03): 3170503609a9SYuri Pankov# For now, assume the future rule is first Sunday in November. 3171503609a9SYuri Pankov 3172f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 3173503609a9SYuri PankovRule Cuba 1928 only - Jun 10 0:00 1:00 D 3174503609a9SYuri PankovRule Cuba 1928 only - Oct 10 0:00 0 S 3175503609a9SYuri PankovRule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 3176503609a9SYuri PankovRule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 3177503609a9SYuri PankovRule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 3178503609a9SYuri PankovRule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 3179503609a9SYuri PankovRule Cuba 1965 only - Jun 1 0:00 1:00 D 3180503609a9SYuri PankovRule Cuba 1965 only - Sep 30 0:00 0 S 3181503609a9SYuri PankovRule Cuba 1966 only - May 29 0:00 1:00 D 3182503609a9SYuri PankovRule Cuba 1966 only - Oct 2 0:00 0 S 3183503609a9SYuri PankovRule Cuba 1967 only - Apr 8 0:00 1:00 D 3184503609a9SYuri PankovRule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 3185503609a9SYuri PankovRule Cuba 1968 only - Apr 14 0:00 1:00 D 3186503609a9SYuri PankovRule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 3187503609a9SYuri PankovRule Cuba 1969 1971 - Oct lastSun 0:00 0 S 3188503609a9SYuri PankovRule Cuba 1972 1974 - Oct 8 0:00 0 S 3189503609a9SYuri PankovRule Cuba 1975 1977 - Oct lastSun 0:00 0 S 3190503609a9SYuri PankovRule Cuba 1978 only - May 7 0:00 1:00 D 3191503609a9SYuri PankovRule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 3192503609a9SYuri PankovRule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 3193503609a9SYuri PankovRule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 3194503609a9SYuri PankovRule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 3195503609a9SYuri PankovRule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 3196503609a9SYuri PankovRule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 3197503609a9SYuri PankovRule Cuba 1996 only - Oct 6 0:00s 0 S 3198503609a9SYuri PankovRule Cuba 1997 only - Oct 12 0:00s 0 S 3199503609a9SYuri PankovRule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 3200503609a9SYuri PankovRule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 3201503609a9SYuri PankovRule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D 3202503609a9SYuri PankovRule Cuba 2004 only - Mar lastSun 0:00s 1:00 D 3203503609a9SYuri PankovRule Cuba 2006 2010 - Oct lastSun 0:00s 0 S 3204503609a9SYuri PankovRule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D 3205503609a9SYuri PankovRule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D 3206503609a9SYuri PankovRule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D 3207503609a9SYuri PankovRule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D 3208503609a9SYuri PankovRule Cuba 2011 only - Nov 13 0:00s 0 S 3209503609a9SYuri PankovRule Cuba 2012 only - Apr 1 0:00s 1:00 D 3210503609a9SYuri PankovRule Cuba 2012 max - Nov Sun>=1 0:00s 0 S 3211503609a9SYuri PankovRule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D 3212503609a9SYuri Pankov 3213374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 3214503609a9SYuri PankovZone America/Havana -5:29:28 - LMT 1890 3215503609a9SYuri Pankov -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 3216503609a9SYuri Pankov -5:00 Cuba C%sT 3217503609a9SYuri Pankov 3218503609a9SYuri Pankov# Dominican Republic 3219503609a9SYuri Pankov 3220503609a9SYuri Pankov# From Steffen Thorsen (2000-10-30): 3221503609a9SYuri Pankov# Enrique Morales reported to me that the Dominican Republic has changed the 3222503609a9SYuri Pankov# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 3223503609a9SYuri Pankov# http://www.listin.com.do/antes/261000/republica/princi.html 3224503609a9SYuri Pankov 3225503609a9SYuri Pankov# From Paul Eggert (2000-12-04): 3226503609a9SYuri Pankov# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 3227503609a9SYuri Pankov 3228503609a9SYuri Pankov# From Rives McDow (2000-12-01): 3229503609a9SYuri Pankov# Dominican Republic changed its mind and presidential decree on Tuesday, 3230503609a9SYuri Pankov# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 3231503609a9SYuri Pankov# Dominican Republic will be reverting to 8 hours from the International Date 3232503609a9SYuri Pankov# Line, and will not be using DST in the foreseeable future. The reason they 3233503609a9SYuri Pankov# decided to use DST was to be in synch with Puerto Rico, who was also going 3234503609a9SYuri Pankov# to implement DST. When Puerto Rico didn't implement DST, the president 3235503609a9SYuri Pankov# decided to revert. 3236503609a9SYuri Pankov 3237503609a9SYuri Pankov 3238f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 3239dafc4501SDan McDonaldRule DR 1966 only - Oct 30 0:00 1:00 EDT 3240dafc4501SDan McDonaldRule DR 1967 only - Feb 28 0:00 0 EST 3241dafc4501SDan McDonaldRule DR 1969 1973 - Oct lastSun 0:00 0:30 -0430 3242dafc4501SDan McDonaldRule DR 1970 only - Feb 21 0:00 0 EST 3243dafc4501SDan McDonaldRule DR 1971 only - Jan 20 0:00 0 EST 3244dafc4501SDan McDonaldRule DR 1972 1974 - Jan 21 0:00 0 EST 3245374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 3246503609a9SYuri PankovZone America/Santo_Domingo -4:39:36 - LMT 1890 3247503609a9SYuri Pankov -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 3248dafc4501SDan McDonald -5:00 DR %s 1974 Oct 27 3249503609a9SYuri Pankov -4:00 - AST 2000 Oct 29 2:00 3250503609a9SYuri Pankov -5:00 US E%sT 2000 Dec 3 1:00 3251503609a9SYuri Pankov -4:00 - AST 3252503609a9SYuri Pankov 3253503609a9SYuri Pankov# El Salvador 3254503609a9SYuri Pankov 3255f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 3256503609a9SYuri PankovRule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 3257503609a9SYuri PankovRule Salv 1987 1988 - Sep lastSun 0:00 0 S 3258503609a9SYuri Pankov# There are too many San Salvadors elsewhere, so use America/El_Salvador 3259503609a9SYuri Pankov# instead of America/San_Salvador. 3260374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 3261503609a9SYuri PankovZone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 3262503609a9SYuri Pankov -6:00 Salv C%sT 3263503609a9SYuri Pankov 3264503609a9SYuri Pankov# Guatemala 3265503609a9SYuri Pankov# 3266503609a9SYuri Pankov# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: 3267503609a9SYuri Pankov# Diario Co Latino, at 3268503609a9SYuri Pankov# <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>, 3269503609a9SYuri Pankov# says in an article dated 2006-04-19 that the Guatemalan government had 3270503609a9SYuri Pankov# decided on that date to advance official time by 60 minutes, to lessen the 3271503609a9SYuri Pankov# impact of the elevated cost of oil.... Daylight saving time will last from 3272503609a9SYuri Pankov# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). 3273503609a9SYuri Pankov# From Paul Eggert (2006-06-22): 3274503609a9SYuri Pankov# The Ministry of Energy and Mines, press release CP-15/2006 3275503609a9SYuri Pankov# (2006-04-19), says DST ends at 24:00. See 3276503609a9SYuri Pankov# http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf 3277503609a9SYuri Pankov 3278f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 3279503609a9SYuri PankovRule Guat 1973 only - Nov 25 0:00 1:00 D 3280503609a9SYuri PankovRule Guat 1974 only - Feb 24 0:00 0 S 3281503609a9SYuri PankovRule Guat 1983 only - May 21 0:00 1:00 D 3282503609a9SYuri PankovRule Guat 1983 only - Sep 22 0:00 0 S 3283503609a9SYuri PankovRule Guat 1991 only - Mar 23 0:00 1:00 D 3284503609a9SYuri PankovRule Guat 1991 only - Sep 7 0:00 0 S 3285503609a9SYuri PankovRule Guat 2006 only - Apr 30 0:00 1:00 D 3286503609a9SYuri PankovRule Guat 2006 only - Oct 1 0:00 0 S 3287374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 3288503609a9SYuri PankovZone America/Guatemala -6:02:04 - LMT 1918 Oct 5 3289503609a9SYuri Pankov -6:00 Guat C%sT 3290503609a9SYuri Pankov 3291503609a9SYuri Pankov# Haiti 3292503609a9SYuri Pankov# From Gwillim Law (2005-04-15): 3293503609a9SYuri Pankov# Risto O. Nykänen wrote me that Haiti is now on DST. 3294503609a9SYuri Pankov# I searched for confirmation, and I found a press release 3295503609a9SYuri Pankov# on the Web page of the Haitian Consulate in Chicago (2005-03-31), 3296503609a9SYuri Pankov# <http://www.haitianconsulate.org/time.doc>. Translated from French, it says: 3297503609a9SYuri Pankov# 3298503609a9SYuri Pankov# "The Prime Minister's Communication Office notifies the public in general 3299503609a9SYuri Pankov# and the press in particular that, following a decision of the Interior 3300503609a9SYuri Pankov# Ministry and the Territorial Collectivities [I suppose that means the 3301503609a9SYuri Pankov# provinces], Haiti will move to Eastern Daylight Time in the night from next 3302503609a9SYuri Pankov# Saturday the 2nd to Sunday the 3rd. 3303503609a9SYuri Pankov# 3304503609a9SYuri Pankov# "Consequently, the Prime Minister's Communication Office wishes to inform 3305503609a9SYuri Pankov# the population that the country's clocks will be set forward one hour 3306503609a9SYuri Pankov# starting at midnight. This provision will hold until the last Saturday in 3307503609a9SYuri Pankov# October 2005. 3308503609a9SYuri Pankov# 3309503609a9SYuri Pankov# "Port-au-Prince, March 31, 2005" 3310503609a9SYuri Pankov# 3311503609a9SYuri Pankov# From Steffen Thorsen (2006-04-04): 3312503609a9SYuri Pankov# I have been informed by users that Haiti observes DST this year like 3313503609a9SYuri Pankov# last year, so the current "only" rule for 2005 might be changed to a 3314503609a9SYuri Pankov# "max" rule or to last until 2006. (Who knows if they will observe DST 3315503609a9SYuri Pankov# next year or if they will extend their DST like US/Canada next year). 3316503609a9SYuri Pankov# 3317503609a9SYuri Pankov# I have found this article about it (in French): 3318503609a9SYuri Pankov# http://www.haitipressnetwork.com/news.cfm?articleID=7612 3319503609a9SYuri Pankov# 3320503609a9SYuri Pankov# The reason seems to be an energy crisis. 3321503609a9SYuri Pankov 3322503609a9SYuri Pankov# From Stephen Colebourne (2007-02-22): 3323503609a9SYuri Pankov# Some IATA info: Haiti won't be having DST in 2007. 3324503609a9SYuri Pankov 3325503609a9SYuri Pankov# From Steffen Thorsen (2012-03-11): 3326503609a9SYuri Pankov# According to several news sources, Haiti will observe DST this year, 3327503609a9SYuri Pankov# apparently using the same start and end date as USA/Canada. 3328503609a9SYuri Pankov# So this means they have already changed their time. 3329503609a9SYuri Pankov# 3330503609a9SYuri Pankov# http://www.alterpresse.org/spip.php?article12510 3331503609a9SYuri Pankov# http://radiovision2000haiti.net/home/?p=13253 3332503609a9SYuri Pankov# 3333503609a9SYuri Pankov# From Arthur David Olson (2012-03-11): 3334503609a9SYuri Pankov# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to 3335503609a9SYuri Pankov# 3:00 a.m. rather than the traditional Haitian jump at midnight. 3336503609a9SYuri Pankov# Assume a US-style fall back as well. 3337503609a9SYuri Pankov 3338503609a9SYuri Pankov# From Steffen Thorsen (2013-03-10): 3339503609a9SYuri Pankov# It appears that Haiti is observing DST this year as well, same rules 3340503609a9SYuri Pankov# as US/Canada. They did it last year as well, and it looks like they 3341503609a9SYuri Pankov# are going to observe DST every year now... 3342503609a9SYuri Pankov# 3343503609a9SYuri Pankov# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ 3344503609a9SYuri Pankov# http://www.canalplushaiti.net/?p=6714 3345503609a9SYuri Pankov 3346503609a9SYuri Pankov# From Steffen Thorsen (2016-03-12): 3347503609a9SYuri Pankov# Jean Antoine, editor of www.haiti-reference.com informed us that Haiti 3348503609a9SYuri Pankov# are not going on DST this year. Several other resources confirm this: ... 3349b654b02dSYuri Pankov# https://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html 3350b654b02dSYuri Pankov# https://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/ 3351503609a9SYuri Pankov# http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/ 3352503609a9SYuri Pankov 3353dafc4501SDan McDonald# From Steffen Thorsen (2017-03-12): 3354dafc4501SDan McDonald# We have received 4 mails from different people telling that Haiti 3355dafc4501SDan McDonald# has started DST again today, and this source seems to confirm that, 3356dafc4501SDan McDonald# I have not been able to find a more authoritative source: 3357dafc4501SDan McDonald# https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html 3358dafc4501SDan McDonald 3359f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 3360503609a9SYuri PankovRule Haiti 1983 only - May 8 0:00 1:00 D 3361503609a9SYuri PankovRule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 3362503609a9SYuri PankovRule Haiti 1983 1987 - Oct lastSun 0:00 0 S 3363503609a9SYuri Pankov# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. 3364503609a9SYuri Pankov# Go with IATA. 3365503609a9SYuri PankovRule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 3366503609a9SYuri PankovRule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 3367503609a9SYuri PankovRule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D 3368503609a9SYuri PankovRule Haiti 2005 2006 - Oct lastSun 0:00 0 S 3369503609a9SYuri PankovRule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D 3370503609a9SYuri PankovRule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S 3371dafc4501SDan McDonaldRule Haiti 2017 max - Mar Sun>=8 2:00 1:00 D 3372dafc4501SDan McDonaldRule Haiti 2017 max - Nov Sun>=1 2:00 0 S 3373374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 3374503609a9SYuri PankovZone America/Port-au-Prince -4:49:20 - LMT 1890 3375503609a9SYuri Pankov -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 3376503609a9SYuri Pankov -5:00 Haiti E%sT 3377503609a9SYuri Pankov 3378503609a9SYuri Pankov# Honduras 3379503609a9SYuri Pankov# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. 3380503609a9SYuri Pankov 3381503609a9SYuri Pankov# From Paul Eggert (2006-05-05): 3382503609a9SYuri Pankov# worldtimezone.com reports a 2006-05-02 Spanish-language AP article 3383503609a9SYuri Pankov# saying Honduras will start using DST midnight Saturday, effective 4 3384503609a9SYuri Pankov# months until September. La Tribuna reported today 3385503609a9SYuri Pankov# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president 3386503609a9SYuri Pankov# of Honduras, refused to back down on this. 3387503609a9SYuri Pankov 3388503609a9SYuri Pankov# From Jesper Nørgaard Welen (2006-08-08): 3389503609a9SYuri Pankov# It seems that Honduras has returned from DST to standard time this Monday at 3390503609a9SYuri Pankov# 00:00 hours (prolonging Sunday to 25 hours duration). 3391503609a9SYuri Pankov# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html 3392503609a9SYuri Pankov 3393503609a9SYuri Pankov# From Paul Eggert (2006-08-08): 3394503609a9SYuri Pankov# Also see Diario El Heraldo, The country returns to standard time (2006-08-08). 3395503609a9SYuri Pankov# http://www.elheraldo.hn/nota.php?nid=54941&sec=12 3396503609a9SYuri Pankov# It mentions executive decree 18-2006. 3397503609a9SYuri Pankov 3398503609a9SYuri Pankov# From Steffen Thorsen (2006-08-17): 3399503609a9SYuri Pankov# Honduras will observe DST from 2007 to 2009, exact dates are not 3400503609a9SYuri Pankov# published, I have located this authoritative source: 3401503609a9SYuri Pankov# http://www.presidencia.gob.hn/noticia.aspx?nId=47 3402503609a9SYuri Pankov 3403503609a9SYuri Pankov# From Steffen Thorsen (2007-03-30): 3404503609a9SYuri Pankov# http://www.laprensahn.com/pais_nota.php?id04962=7386 3405503609a9SYuri Pankov# So it seems that Honduras will not enter DST this year.... 3406503609a9SYuri Pankov 3407f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 3408503609a9SYuri PankovRule Hond 1987 1988 - May Sun>=1 0:00 1:00 D 3409503609a9SYuri PankovRule Hond 1987 1988 - Sep lastSun 0:00 0 S 3410503609a9SYuri PankovRule Hond 2006 only - May Sun>=1 0:00 1:00 D 3411503609a9SYuri PankovRule Hond 2006 only - Aug Mon>=1 0:00 0 S 3412374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 3413503609a9SYuri PankovZone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 3414503609a9SYuri Pankov -6:00 Hond C%sT 3415503609a9SYuri Pankov# 3416503609a9SYuri Pankov# Great Swan I ceded by US to Honduras in 1972 3417503609a9SYuri Pankov 3418503609a9SYuri Pankov# Jamaica 3419503609a9SYuri Pankov# Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an 3420503609a9SYuri Pankov# unspecified official document, and says "This time is used throughout the 3421427b4c5cSAndy Fiddaman# island". Go with Milne. 3422503609a9SYuri Pankov# 3423503609a9SYuri Pankov# Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but 3424503609a9SYuri Pankov# Lance Neita writes that Prime Minister Michael Manley decreed it January 5. 3425503609a9SYuri Pankov# Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that 3426503609a9SYuri Pankov# Manley's supporters associated this act with Manley's nickname "Joshua" 3427503609a9SYuri Pankov# (recall that in the Bible the sun stood still at Joshua's request), 3428503609a9SYuri Pankov# and with the Rod of Correction which Manley said he had received from 3429503609a9SYuri Pankov# Haile Selassie, Emperor of Ethiopia. See: 3430503609a9SYuri Pankov# Neita L. The politician in all of us. Jamaica Observer 2014-09-20 3431503609a9SYuri Pankov# http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647 3432503609a9SYuri Pankov# 3433374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 3434427b4c5cSAndy Fiddaman #STDOFF -5:07:10.41 34353508b934SYuri PankovZone America/Jamaica -5:07:10 - LMT 1890 # Kingston 34363508b934SYuri Pankov -5:07:10 - KMT 1912 Feb # Kingston Mean Time 3437503609a9SYuri Pankov -5:00 - EST 1974 3438503609a9SYuri Pankov -5:00 US E%sT 1984 3439503609a9SYuri Pankov -5:00 - EST 3440503609a9SYuri Pankov 3441503609a9SYuri Pankov# Martinique 3442374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 3443503609a9SYuri PankovZone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 3444*e15592c8SRobert Mustacchi -4:04:20 - FFMT 1911 May 1 # Fort-de-France MT 3445503609a9SYuri Pankov -4:00 - AST 1980 Apr 6 3446503609a9SYuri Pankov -4:00 1:00 ADT 1980 Sep 28 3447503609a9SYuri Pankov -4:00 - AST 3448503609a9SYuri Pankov 3449503609a9SYuri Pankov# Nicaragua 3450503609a9SYuri Pankov# 3451503609a9SYuri Pankov# This uses Shanks & Pottenger for times before 2005. 3452503609a9SYuri Pankov# 3453503609a9SYuri Pankov# From Steffen Thorsen (2005-04-12): 3454503609a9SYuri Pankov# I've got reports from 8 different people that Nicaragua just started 3455503609a9SYuri Pankov# DST on Sunday 2005-04-10, in order to save energy because of 3456503609a9SYuri Pankov# expensive petroleum. The exact end date for DST is not yet 3457503609a9SYuri Pankov# announced, only "September" but some sites also say "mid-September". 3458503609a9SYuri Pankov# Some background information is available on the President's official site: 3459503609a9SYuri Pankov# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm 3460503609a9SYuri Pankov# The Decree, no 23-2005 is available here: 3461503609a9SYuri Pankov# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2005/Decreto%2023-2005%20Se%20adelanta%20en%20una%20hora%20en%20todo%20el%20territorio%20nacional%20apartir%20de%20las%2024horas%20del%2009%20de%20Abril.pdf 3462503609a9SYuri Pankov# 3463503609a9SYuri Pankov# From Paul Eggert (2005-05-01): 3464503609a9SYuri Pankov# The decree doesn't say anything about daylight saving, but for now let's 3465503609a9SYuri Pankov# assume that it is daylight saving.... 3466503609a9SYuri Pankov# 3467503609a9SYuri Pankov# From Gwillim Law (2005-04-21): 3468503609a9SYuri Pankov# The Associated Press story on the time change, which can be found at 3469503609a9SYuri Pankov# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html 3470503609a9SYuri Pankov# and elsewhere, says (fifth paragraph, translated from Spanish): "The last 3471503609a9SYuri Pankov# time that a change of clocks was applied to save energy was in the year 2000 3472503609a9SYuri Pankov# during the Arnoldo Alemán administration."... 3473503609a9SYuri Pankov# The northamerica file says that Nicaragua has been on UTC-6 continuously 3474503609a9SYuri Pankov# since December 1998. I wasn't able to find any details of Nicaraguan time 3475503609a9SYuri Pankov# changes in 2000. Perhaps a note could be added to the northamerica file, to 3476503609a9SYuri Pankov# the effect that we have indirect evidence that DST was observed in 2000. 3477503609a9SYuri Pankov# 3478503609a9SYuri Pankov# From Jesper Nørgaard Welen (2005-11-02): 3479503609a9SYuri Pankov# Nicaragua left DST the 2005-10-02 at 00:00 (local time). 3480503609a9SYuri Pankov# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm 3481503609a9SYuri Pankov# (2005-09-26) 3482503609a9SYuri Pankov# 3483503609a9SYuri Pankov# From Jesper Nørgaard Welen (2006-05-05): 3484503609a9SYuri Pankov# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 3485503609a9SYuri Pankov# (my informal translation) 3486503609a9SYuri Pankov# By order of the president of the republic, Enrique Bolaños, Nicaragua 3487503609a9SYuri Pankov# advanced by sixty minutes their official time, yesterday at 2 in the 3488503609a9SYuri Pankov# morning, and will stay that way until 30th of September. 3489503609a9SYuri Pankov# 3490503609a9SYuri Pankov# From Jesper Nørgaard Welen (2006-09-30): 3491503609a9SYuri Pankov# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf 3492503609a9SYuri Pankov# My informal translation runs: 3493503609a9SYuri Pankov# The natural sun time is restored in all the national territory, in that the 3494503609a9SYuri Pankov# time is returned one hour at 01:00 am of October 1 of 2006. 3495503609a9SYuri Pankov# 3496f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 3497503609a9SYuri PankovRule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 3498503609a9SYuri PankovRule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 3499503609a9SYuri PankovRule Nic 2005 only - Apr 10 0:00 1:00 D 3500503609a9SYuri PankovRule Nic 2005 only - Oct Sun>=1 0:00 0 S 3501503609a9SYuri PankovRule Nic 2006 only - Apr 30 2:00 1:00 D 3502503609a9SYuri PankovRule Nic 2006 only - Oct Sun>=1 1:00 0 S 3503374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 3504503609a9SYuri PankovZone America/Managua -5:45:08 - LMT 1890 3505503609a9SYuri Pankov -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 3506503609a9SYuri Pankov -6:00 - CST 1973 May 3507503609a9SYuri Pankov -5:00 - EST 1975 Feb 16 3508503609a9SYuri Pankov -6:00 Nic C%sT 1992 Jan 1 4:00 3509503609a9SYuri Pankov -5:00 - EST 1992 Sep 24 3510503609a9SYuri Pankov -6:00 - CST 1993 3511503609a9SYuri Pankov -5:00 - EST 1997 3512503609a9SYuri Pankov -6:00 Nic C%sT 3513503609a9SYuri Pankov 3514f117aa50SRobert Mustacchi# Cayman Is 3515503609a9SYuri Pankov# Panama 3516f117aa50SRobert Mustacchi# 3517f117aa50SRobert Mustacchi# Atikokan and Coral Harbour, Canada, match Panama since 1970. 3518374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 3519503609a9SYuri PankovZone America/Panama -5:18:08 - LMT 1890 3520503609a9SYuri Pankov -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time 3521503609a9SYuri Pankov -5:00 - EST 3522503609a9SYuri Pankov 3523f117aa50SRobert Mustacchi# Anguilla 3524f117aa50SRobert Mustacchi# Antigua & Barbuda 3525f117aa50SRobert Mustacchi# Aruba 3526f117aa50SRobert Mustacchi# Caribbean Netherlands 3527f117aa50SRobert Mustacchi# Curaçao 3528f117aa50SRobert Mustacchi# Dominica 3529f117aa50SRobert Mustacchi# Grenada 3530f117aa50SRobert Mustacchi# Guadeloupe 3531f117aa50SRobert Mustacchi# Montserrat 3532503609a9SYuri Pankov# Puerto Rico 3533f117aa50SRobert Mustacchi# St Barthélemy 3534f117aa50SRobert Mustacchi# St Kitts-Nevis 3535f117aa50SRobert Mustacchi# Sint Maarten / St Martin 3536f117aa50SRobert Mustacchi# St Lucia 3537f117aa50SRobert Mustacchi# St Vincent & the Grenadines 3538f117aa50SRobert Mustacchi# Trinidad & Tobago 3539f117aa50SRobert Mustacchi# Virgin Is (UK & US) 3540f117aa50SRobert Mustacchi# 3541503609a9SYuri Pankov# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. 3542374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 3543503609a9SYuri PankovZone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 3544503609a9SYuri Pankov -4:00 - AST 1942 May 3 3545503609a9SYuri Pankov -4:00 US A%sT 1946 3546503609a9SYuri Pankov -4:00 - AST 3547503609a9SYuri Pankov 3548503609a9SYuri Pankov# St Pierre and Miquelon 3549503609a9SYuri Pankov# There are too many St Pierres elsewhere, so we'll use 'Miquelon'. 3550374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 3551*e15592c8SRobert MustacchiZone America/Miquelon -3:44:40 - LMT 1911 Jun 15 # St Pierre 3552503609a9SYuri Pankov -4:00 - AST 1980 May 3553dafc4501SDan McDonald -3:00 - -03 1987 3554dafc4501SDan McDonald -3:00 Canada -03/-02 3555503609a9SYuri Pankov 3556503609a9SYuri Pankov# Turks and Caicos 3557503609a9SYuri Pankov# 3558503609a9SYuri Pankov# From Chris Dunn in 3559b654b02dSYuri Pankov# https://bugs.debian.org/415007 3560503609a9SYuri Pankov# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the 3561503609a9SYuri Pankov# daylight saving dates for time changes have been adjusted to match 3562503609a9SYuri Pankov# the recent U.S. change of dates. 3563503609a9SYuri Pankov# 3564503609a9SYuri Pankov# From Brian Inglis (2007-04-28): 3565503609a9SYuri Pankov# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] 3566503609a9SYuri Pankov# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three 3567503609a9SYuri Pankov# rows before that there is an out of date entry for Oct: 3568503609a9SYuri Pankov# "Eastern Standard Times Begins 2007 3569503609a9SYuri Pankov# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" 3570503609a9SYuri Pankov# indicating that the normal ET rules are followed. 3571f915e6d3SRobert Mustacchi 3572503609a9SYuri Pankov# From Paul Eggert (2014-08-19): 3573503609a9SYuri Pankov# The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See: 3574503609a9SYuri Pankov# http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm 3575503609a9SYuri Pankov# Model this as a switch from EST/EDT to AST ... 3576503609a9SYuri Pankov# From Chris Walton (2014-11-04): 3577503609a9SYuri Pankov# ... the TCI government appears to have delayed the switch to 3578503609a9SYuri Pankov# "permanent daylight saving time" by one year.... 3579503609a9SYuri Pankov# http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm 3580503609a9SYuri Pankov# 3581b654b02dSYuri Pankov# From the Turks & Caicos Cabinet (2017-07-20), heads-up from Steffen Thorsen: 3582b654b02dSYuri Pankov# ... agreed to the reintroduction in TCI of Daylight Saving Time (DST) 3583b654b02dSYuri Pankov# during the summer months and Standard Time, also known as Local 3584b654b02dSYuri Pankov# Time, during the winter months with effect from April 2018 ... 3585b654b02dSYuri Pankov# https://www.gov.uk/government/news/turks-and-caicos-post-cabinet-meeting-statement--3 3586b654b02dSYuri Pankov# From Paul Eggert (2017-08-26): 3587b654b02dSYuri Pankov# The date of effect of the spring 2018 change appears to be March 11, 3588b654b02dSYuri Pankov# which makes more sense. See: Hamilton D. Time change back 3589b654b02dSYuri Pankov# by March 2018 for TCI. Magnetic Media. 2017-08-25. 3590b654b02dSYuri Pankov# http://magneticmediatv.com/2017/08/time-change-back-by-march-2018-for-tci/ 3591b654b02dSYuri Pankov# 3592f915e6d3SRobert Mustacchi# From P Chan (2020-11-27): 3593f915e6d3SRobert Mustacchi# Standard Time Declaration Order 2015 (L.N. 15/2015) 3594f915e6d3SRobert Mustacchi# http://online.fliphtml5.com/fizd/czin/#p=2 3595f915e6d3SRobert Mustacchi# 3596f915e6d3SRobert Mustacchi# Standard Time Declaration Order 2017 (L.N. 31/2017) 3597f915e6d3SRobert Mustacchi# http://online.fliphtml5.com/fizd/dmcu/#p=2 3598f915e6d3SRobert Mustacchi# 3599f915e6d3SRobert Mustacchi# From Tim Parenti (2020-12-05): 3600f915e6d3SRobert Mustacchi# Although L.N. 31/2017 reads that it "shall come into operation at 2:00 a.m. 3601f915e6d3SRobert Mustacchi# on 11th March 2018", a precise interpretation here poses some problems. The 3602f915e6d3SRobert Mustacchi# order states that "the standard time to be observed throughout the Turks and 3603f915e6d3SRobert Mustacchi# Caicos Islands shall be the same time zone as the Eastern United States of 3604f915e6d3SRobert Mustacchi# America" and further clarifies "[f]or the avoidance of doubt" that it 3605f915e6d3SRobert Mustacchi# "applies to the Eastern Standard Time as well as any changes thereto for 3606f915e6d3SRobert Mustacchi# Daylight Saving Time." However, as clocks in Turks and Caicos approached 3607f915e6d3SRobert Mustacchi# 02:00 -04, and thus the declared implementation time, it was still 01:00 EST 3608f915e6d3SRobert Mustacchi# (-05), as DST in the Eastern US would not start until an hour later. 3609f915e6d3SRobert Mustacchi# 3610f915e6d3SRobert Mustacchi# Since it is unlikely that those on the islands switched their clocks twice in 3611f915e6d3SRobert Mustacchi# the span of an hour, we assume instead that the adoption of EDT actually took 3612f915e6d3SRobert Mustacchi# effect once clocks in the Eastern US had sprung forward, from 03:00 -04. 3613f915e6d3SRobert Mustacchi# This discrepancy only affects the time zone abbreviation and DST flag for the 3614f915e6d3SRobert Mustacchi# intervening hour, not wall clock times, as -04 was maintained throughout. 3615f915e6d3SRobert Mustacchi 3616374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 3617503609a9SYuri PankovZone America/Grand_Turk -4:44:32 - LMT 1890 3618427b4c5cSAndy Fiddaman #STDOFF -5:07:10.41 36193508b934SYuri Pankov -5:07:10 - KMT 1912 Feb # Kingston Mean Time 3620503609a9SYuri Pankov -5:00 - EST 1979 3621f915e6d3SRobert Mustacchi -5:00 US E%sT 2015 Mar 8 2:00 3622b654b02dSYuri Pankov -4:00 - AST 2018 Mar 11 3:00 3623b654b02dSYuri Pankov -5:00 US E%sT 3624503609a9SYuri Pankov 3625503609a9SYuri Pankov# Local Variables: 3626503609a9SYuri Pankov# coding: utf-8 3627503609a9SYuri Pankov# End: 3628