xref: /freebsd/contrib/tzdata/northamerica (revision ef0cb5db0af0d5d5b75b74f8e534fe601b7176d7)
1# This file is in the public domain, so clarified as of
2# 2009-05-17 by Arthur David Olson.
3
4# also includes Central America and the Caribbean
5
6# This file is by no means authoritative; if you think you know better,
7# go ahead and edit the file (and please send any changes to
8# tz@iana.org for general use in the future).  For more, please see
9# the file CONTRIBUTING in the tz distribution.
10
11# From Paul Eggert (1999-03-22):
12# A reliable and entertaining source about time zones is
13# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
14
15###############################################################################
16
17# United States
18
19# From Paul Eggert (1999-03-31):
20# Howse writes (pp 121-125) that time zones were invented by
21# Professor Charles Ferdinand Dowd (1825-1904),
22# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).
23# His pamphlet "A System of National Time for Railroads" (1870)
24# was the result of his proposals at the Convention of Railroad Trunk Lines
25# in New York City (1869-10).  His 1870 proposal was based on Washington, DC,
26# but in 1872-05 he moved the proposed origin to Greenwich.
27# His proposal was adopted by the railroads on 1883-11-18 at 12:00,
28# and the most of the country soon followed suit.
29
30# From Paul Eggert (2005-04-16):
31# That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
32# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).
33
34# From Paul Eggert (2006-03-22):
35# A good source for time zone historical data in the US is
36# Thomas G. Shanks, The American Atlas (5th edition),
37# San Diego: ACS Publications, Inc. (1991).
38# Make sure you have the errata sheet; the book is somewhat useless without it.
39# It is the source for most of the pre-1991 US entries below.
40
41# From Paul Eggert (2001-03-06):
42# Daylight Saving Time was first suggested as a joke by Benjamin Franklin
43# in his whimsical essay "An Economical Project for Diminishing the Cost
44# of Light" published in the Journal de Paris (1784-04-26).
45# Not everyone is happy with the results:
46#
47#	I don't really care how time is reckoned so long as there is some
48#	agreement about it, but I object to being told that I am saving
49#	daylight when my reason tells me that I am doing nothing of the kind.
50#	I even object to the implication that I am wasting something
51#	valuable if I stay in bed after the sun has risen.  As an admirer
52#	of moonlight I resent the bossy insistence of those who want to
53#	reduce my time for enjoying it.  At the back of the Daylight Saving
54#	scheme I detect the bony, blue-fingered hand of Puritanism, eager
55#	to push people into bed earlier, and get them up earlier, to make
56#	them healthy, wealthy and wise in spite of themselves.
57#
58#	 -- Robertson Davies, The diary of Samuel Marchbanks,
59#	   Clarke, Irwin (1947), XIX, Sunday
60#
61# For more about the first ten years of DST in the United States, see
62# Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint
63# (Carnegie Library of Pittsburgh, 1927).
64# http://www.clpgh.org/exhibit/dst.html
65#
66# Shanks says that DST was called "War Time" in the US in 1918 and 1919.
67# However, DST was imposed by the Standard Time Act of 1918, which
68# was the first nationwide legal time standard, and apparently
69# time was just called "Standard Time" or "Daylight Saving Time".
70
71# From Arthur David Olson:
72# US Daylight Saving Time ended on the last Sunday of *October* in 1974.
73# See, for example, the front page of the Saturday, 1974-10-26
74# and Sunday, 1974-10-27 editions of the Washington Post.
75
76# From Arthur David Olson:
77# Before the Uniform Time Act of 1966 took effect in 1967, observance of
78# Daylight Saving Time in the US was by local option, except during wartime.
79
80# From Arthur David Olson (2000-09-25):
81# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
82# In the introduction, Oboler spoke of "Eastern Peace Time."
83# An AltaVista search turned up:
84# http://rowayton.org/rhs/hstaug45.html
85# "When the time is announced over the radio now, it is 'Eastern Peace
86# Time' instead of the old familiar 'Eastern War Time.'  Peace is wonderful."
87# (August 1945) by way of confirmation.
88
89# From Joseph Gallant citing
90# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
91# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
92# to switch to London for Attlee's address, but the American people
93# never got to hear his speech live. According to one press account,
94# CBS' Bob Trout was first to announce the word of Japan's surrender,
95# but a few seconds later, NBC, ABC and Mutual also flashed the word
96# of surrender, all of whom interrupting the bells of Big Ben in
97# London which were to precede Mr. Attlee's speech.
98
99# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout.  From
100# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times:
101#
102# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender.
103# Any announcement from Asia would reach St. John's New York newsroom on a
104# wire service teletype machine, which had prescribed signals for major news.
105# Associated Press, for example, would ring five bells before spewing out
106# typed copy of an important story, and 10 bells for news "of transcendental
107# importance."
108#
109# On Aug. 14, stalling while talking steadily into the NBC networks' open
110# microphone, St. John heard five bells and waited only to hear a sixth bell,
111# before announcing confidently: "Ladies and gentlemen, World War II is over.
112# The Japanese have agreed to our surrender terms."
113#
114# He had scored a 20-second scoop on other broadcasters.
115
116# From Arthur David Olson (2005-08-22):
117# Paul has been careful to use the "US" rules only in those locations
118# that are part of the United States; this reflects the real scope of
119# U.S. government action.  So even though the "US" rules have changed
120# in the latest release, other countries won't be affected.
121
122# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
123Rule	US	1918	1919	-	Mar	lastSun	2:00	1:00	D
124Rule	US	1918	1919	-	Oct	lastSun	2:00	0	S
125Rule	US	1942	only	-	Feb	9	2:00	1:00	W # War
126Rule	US	1945	only	-	Aug	14	23:00u	1:00	P # Peace
127Rule	US	1945	only	-	Sep	lastSun	2:00	0	S
128Rule	US	1967	2006	-	Oct	lastSun	2:00	0	S
129Rule	US	1967	1973	-	Apr	lastSun	2:00	1:00	D
130Rule	US	1974	only	-	Jan	6	2:00	1:00	D
131Rule	US	1975	only	-	Feb	23	2:00	1:00	D
132Rule	US	1976	1986	-	Apr	lastSun	2:00	1:00	D
133Rule	US	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
134Rule	US	2007	max	-	Mar	Sun>=8	2:00	1:00	D
135Rule	US	2007	max	-	Nov	Sun>=1	2:00	0	S
136
137# From Arthur David Olson, 2005-12-19
138# We generate the files specified below to guard against old files with
139# obsolete information being left in the time zone binary directory.
140# We limit the list to names that have appeared in previous versions of
141# this time zone package.
142# We do these as separate Zones rather than as Links to avoid problems if
143# a particular place changes whether it observes DST.
144# We put these specifications here in the northamerica file both to
145# increase the chances that they'll actually get compiled and to
146# avoid the need to duplicate the US rules in another file.
147
148# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
149Zone	EST		 -5:00	-	EST
150Zone	MST		 -7:00	-	MST
151Zone	HST		-10:00	-	HST
152Zone	EST5EDT		 -5:00	US	E%sT
153Zone	CST6CDT		 -6:00	US	C%sT
154Zone	MST7MDT		 -7:00	US	M%sT
155Zone	PST8PDT		 -8:00	US	P%sT
156
157# From Bob Devine (1988-01-28):
158# ...Alaska (and Hawaii) had the timezone names changed in 1967.
159#    old			 new
160#    Pacific Standard Time(PST)  -same-
161#    Yukon Standard Time(YST)    -same-
162#    Central Alaska S.T. (CAT)   Alaska-Hawaii St[an]dard Time (AHST)
163#    Nome Standard Time (NT)     Bering Standard Time (BST)
164#
165# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz.
166#    The YST zone now covers nearly all of the state, AHST just part
167#    of the Aleutian islands.   No DST.
168
169# From Paul Eggert (1995-12-19):
170# The tables below use 'NST', not 'NT', for Nome Standard Time.
171# I invented 'CAWT' for Central Alaska War Time.
172
173# From U. S. Naval Observatory (1989-01-19):
174# USA  EASTERN       5 H  BEHIND UTC    NEW YORK, WASHINGTON
175# USA  EASTERN       4 H  BEHIND UTC    APR 3 - OCT 30
176# USA  CENTRAL       6 H  BEHIND UTC    CHICAGO, HOUSTON
177# USA  CENTRAL       5 H  BEHIND UTC    APR 3 - OCT 30
178# USA  MOUNTAIN      7 H  BEHIND UTC    DENVER
179# USA  MOUNTAIN      6 H  BEHIND UTC    APR 3 - OCT 30
180# USA  PACIFIC       8 H  BEHIND UTC    L.A., SAN FRANCISCO
181# USA  PACIFIC       7 H  BEHIND UTC    APR 3 - OCT 30
182# USA  ALASKA STD    9 H  BEHIND UTC    MOST OF ALASKA     (AKST)
183# USA  ALASKA STD    8 H  BEHIND UTC    APR 3 - OCT 30 (AKDT)
184# USA  ALEUTIAN     10 H  BEHIND UTC    ISLANDS WEST OF 170W
185# USA    "           9 H  BEHIND UTC    APR 3 - OCT 30
186# USA  HAWAII       10 H  BEHIND UTC
187# USA  BERING       11 H  BEHIND UTC    SAMOA, MIDWAY
188
189# From Arthur David Olson (1989-01-21):
190# The above dates are for 1988.
191# Note the "AKST" and "AKDT" abbreviations, the claim that there's
192# no DST in Samoa, and the claim that there is DST in Alaska and the
193# Aleutians.
194
195# From Arthur David Olson (1988-02-13):
196# Legal standard time zone names, from United States Code (1982 Edition and
197# Supplement III), Title 15, Chapter 6, Section 260 and forward.  First, names
198# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966
199# took effect), as explained in sections 263 and 261:
200#	(none)
201#	United States standard eastern time
202#	United States standard mountain time
203#	United States standard central time
204#	United States standard Pacific time
205#	(none)
206#	United States standard Alaska time
207#	(none)
208# Next, names from 1967-04-01 until 1983-11-30 (the date for
209# public law 98-181):
210#	Atlantic standard time
211#	eastern standard time
212#	central standard time
213#	mountain standard time
214#	Pacific standard time
215#	Yukon standard time
216#	Alaska-Hawaii standard time
217#	Bering standard time
218# And after 1983-11-30:
219#	Atlantic standard time
220#	eastern standard time
221#	central standard time
222#	mountain standard time
223#	Pacific standard time
224#	Alaska standard time
225#	Hawaii-Aleutian standard time
226#	Samoa standard time
227# The law doesn't give abbreviations.
228#
229# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
230# Public law 106-564 (2000-12-23) introduced ... "Chamorro Standard Time"
231# for time in Guam and the Northern Marianas.  See the file "australasia".
232#
233# From Paul Eggert (2015-04-17):
234# HST and HDT are standardized abbreviations for Hawaii-Aleutian
235# standard and daylight times.  See section 9.47 (p 234) of the
236# U.S. Government Printing Office Style Manual (2008)
237# http://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf
238
239# From Arthur David Olson, 2005-08-09
240# The following was signed into law on 2005-08-08.
241#
242# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
243#   (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15
244#   U.S.C. 260a(a)) is amended--
245#     (1) by striking "first Sunday of April" and inserting "second
246#     Sunday of March"; and
247#     (2) by striking "last Sunday of October" and inserting "first
248#     Sunday of November'.
249#   (b) Effective Date.--Subsection (a) shall take effect 1 year after the
250#   date of enactment of this Act or March 1, 2007, whichever is later.
251#   (c) Report to Congress.--Not later than 9 months after the effective
252#   date stated in subsection (b), the Secretary shall report to Congress
253#   on the impact of this section on energy consumption in the United
254#   States.
255#   (d) Right to Revert.--Congress retains the right to revert the
256#   Daylight Saving Time back to the 2005 time schedules once the
257#   Department study is complete.
258
259# US eastern time, represented by New York
260
261# Connecticut, Delaware, District of Columbia, most of Florida,
262# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky
263# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts,
264# New Hampshire, New Jersey, New York, North Carolina, Ohio,
265# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee,
266# Vermont, Virginia, West Virginia
267
268# From Dave Cantor (2004-11-02):
269# Early this summer I had the occasion to visit the Mount Washington
270# Observatory weather station atop (of course!) Mount Washington [, NH]....
271# One of the staff members said that the station was on Eastern Standard Time
272# and didn't change their clocks for Daylight Saving ... so that their
273# reports will always have times which are 5 hours behind UTC.
274
275# From Paul Eggert (2005-08-26):
276# According to today's Huntsville Times
277# http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1
278# a few towns on Alabama's "eastern border with Georgia, such as Phenix City
279# in Russell County, Lanett in Chambers County and some towns in Lee County,
280# set their watches and clocks on Eastern time."  It quotes H.H. "Bubba"
281# Roberts, city administrator in Phenix City. as saying "We are in the Central
282# time zone, but we do go by the Eastern time zone because so many people work
283# in Columbus."
284
285# From Paul Eggert (2014-09-06):
286# Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208
287# says that New York City Hall time was 3 minutes 58.4 seconds fast of
288# Eastern time (i.e., -4:56:01.6) just before the 1883 switch.  Round to the
289# nearest second.
290
291# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
292Rule	NYC	1920	only	-	Mar	lastSun	2:00	1:00	D
293Rule	NYC	1920	only	-	Oct	lastSun	2:00	0	S
294Rule	NYC	1921	1966	-	Apr	lastSun	2:00	1:00	D
295Rule	NYC	1921	1954	-	Sep	lastSun	2:00	0	S
296Rule	NYC	1955	1966	-	Oct	lastSun	2:00	0	S
297# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
298Zone America/New_York	-4:56:02 -	LMT	1883 Nov 18 12:03:58
299			-5:00	US	E%sT	1920
300			-5:00	NYC	E%sT	1942
301			-5:00	US	E%sT	1946
302			-5:00	NYC	E%sT	1967
303			-5:00	US	E%sT
304
305# US central time, represented by Chicago
306
307# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
308# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
309# Washington counties), Illinois, western Indiana
310# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
311# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
312# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
313# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
314# western Tennessee, most of Texas, Wisconsin
315
316# From Larry M. Smith (2006-04-26) re Wisconsin:
317# http://www.legis.state.wi.us/statutes/Stat0175.pdf ...
318# is currently enforced at the 01:00 time of change.  Because the local
319# "bar time" in the state corresponds to 02:00, a number of citations
320# are issued for the "sale of class 'B' alcohol after prohibited
321# hours" within the deviated hour of this change every year....
322#
323# From Douglas R. Bomberg (2007-03-12):
324# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI
325# Statue 175 closer in synch with the US Congress' intent....
326# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf
327
328# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
329Rule	Chicago	1920	only	-	Jun	13	2:00	1:00	D
330Rule	Chicago	1920	1921	-	Oct	lastSun	2:00	0	S
331Rule	Chicago	1921	only	-	Mar	lastSun	2:00	1:00	D
332Rule	Chicago	1922	1966	-	Apr	lastSun	2:00	1:00	D
333Rule	Chicago	1922	1954	-	Sep	lastSun	2:00	0	S
334Rule	Chicago	1955	1966	-	Oct	lastSun	2:00	0	S
335# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
336Zone America/Chicago	-5:50:36 -	LMT	1883 Nov 18 12:09:24
337			-6:00	US	C%sT	1920
338			-6:00	Chicago	C%sT	1936 Mar  1  2:00
339			-5:00	-	EST	1936 Nov 15  2:00
340			-6:00	Chicago	C%sT	1942
341			-6:00	US	C%sT	1946
342			-6:00	Chicago	C%sT	1967
343			-6:00	US	C%sT
344# Oliver County, ND switched from mountain to central time on 1992-10-25.
345Zone America/North_Dakota/Center -6:45:12 - LMT	1883 Nov 18 12:14:48
346			-7:00	US	M%sT	1992 Oct 25  2:00
347			-6:00	US	C%sT
348# Morton County, ND, switched from mountain to central time on
349# 2003-10-26, except for the area around Mandan which was already central time.
350# See <http://dmses.dot.gov/docimages/p63/135818.pdf>.
351# Officially this switch also included part of Sioux County, and
352# Jones, Mellette, and Todd Counties in South Dakota;
353# but in practice these other counties were already observing central time.
354# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.
355Zone America/North_Dakota/New_Salem -6:45:39 - LMT	1883 Nov 18 12:14:21
356			-7:00	US	M%sT	2003 Oct 26  2:00
357			-6:00	US	C%sT
358
359# From Josh Findley (2011-01-21):
360# ...it appears that Mercer County, North Dakota, changed from the
361# mountain time zone to the central time zone at the last transition from
362# daylight-saving to standard time (on Nov. 7, 2010):
363# http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm
364# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html
365
366# From Andy Lipscomb (2011-01-24):
367# ...according to the Census Bureau, the largest city is Beulah (although
368# it's commonly referred to as Beulah-Hazen, with Hazen being the next
369# largest city in Mercer County).  Google Maps places Beulah's city hall
370# at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset
371# of 6h47'07".
372
373Zone America/North_Dakota/Beulah -6:47:07 - LMT	1883 Nov 18 12:12:53
374			-7:00	US	M%sT	2010 Nov  7  2:00
375			-6:00	US	C%sT
376
377# US mountain time, represented by Denver
378#
379# Colorado, far western Kansas, Montana, western
380# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City),
381# New Mexico, southwestern North Dakota,
382# western South Dakota, far western Texas (El Paso County, Hudspeth County,
383# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming
384#
385# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
386Rule	Denver	1920	1921	-	Mar	lastSun	2:00	1:00	D
387Rule	Denver	1920	only	-	Oct	lastSun	2:00	0	S
388Rule	Denver	1921	only	-	May	22	2:00	0	S
389Rule	Denver	1965	1966	-	Apr	lastSun	2:00	1:00	D
390Rule	Denver	1965	1966	-	Oct	lastSun	2:00	0	S
391# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
392Zone America/Denver	-6:59:56 -	LMT	1883 Nov 18 12:00:04
393			-7:00	US	M%sT	1920
394			-7:00	Denver	M%sT	1942
395			-7:00	US	M%sT	1946
396			-7:00	Denver	M%sT	1967
397			-7:00	US	M%sT
398
399# US Pacific time, represented by Los Angeles
400#
401# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
402# Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county
403# north of the Salmon River, and the towns of Burgdorf and Warren),
404# Nevada (except West Wendover), Oregon (except the northern 3/4 of
405# Malheur county), and Washington
406#
407# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
408Rule	CA	1948	only	-	Mar	14	2:00	1:00	D
409Rule	CA	1949	only	-	Jan	 1	2:00	0	S
410Rule	CA	1950	1966	-	Apr	lastSun	2:00	1:00	D
411Rule	CA	1950	1961	-	Sep	lastSun	2:00	0	S
412Rule	CA	1962	1966	-	Oct	lastSun	2:00	0	S
413# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
414Zone America/Los_Angeles -7:52:58 -	LMT	1883 Nov 18 12:07:02
415			-8:00	US	P%sT	1946
416			-8:00	CA	P%sT	1967
417			-8:00	US	P%sT
418
419# Alaska
420# AK%sT is the modern abbreviation for -9:00 per USNO.
421#
422# From Paul Eggert (2001-05-30):
423# Howse writes that Alaska switched from the Julian to the Gregorian calendar,
424# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
425# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian,
426# also a Friday.  Include only the time zone part of this transition,
427# ignoring the switch from Julian to Gregorian, since we can't represent
428# the Julian calendar.
429#
430# As far as we know, none of the exact locations mentioned below were
431# permanently inhabited in 1867 by anyone using either calendar.
432# (Yakutat was colonized by the Russians in 1799, but the settlement
433# was destroyed in 1805 by a Yakutat-kon war party.)  However, there
434# were nearby inhabitants in some cases and for our purposes perhaps
435# it's best to simply use the official transition.
436
437# From Paul Eggert (2014-07-18):
438# One opinion of the early-1980s turmoil in Alaska over time zones and
439# daylight saving time appeared as graffiti on a Juneau airport wall:
440# "Welcome to Juneau.  Please turn your watch back to the 19th century."
441# See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01.
442# http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html
443#
444# Steve Ferguson (2011-01-31) referred to the following source:
445# Norris F. Keeping time in Alaska: national directives, local response.
446# Alaska History 2001;16(1-2).
447# http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/
448
449# From Arthur David Olson (2011-02-01):
450# Here's database-relevant material from the 2001 "Alaska History" article:
451#
452# On September 20 [1979]...DOT...officials decreed that on April 27,
453# 1980, Juneau and other nearby communities would move to Yukon Time.
454# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on
455# Pacific Time.
456#
457# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the
458# Department's September 1979 decision. Juneau and other communities in
459# northern Southeast reverted to Pacific Time on October 26.
460#
461# On October 28 [1983]...the Metlakatla Indian Community Council voted
462# unanimously to keep the reservation on Pacific Time.
463#
464# According to DOT official Joanne Petrie, Indian reservations are not
465# bound to follow time zones imposed by neighboring jurisdictions.
466#
467# (The last is consistent with how the database now handles the Navajo
468# Nation.)
469
470# From Arthur David Olson (2011-02-09):
471# I just spoke by phone with a staff member at the Metlakatla Indian
472# Community office (using contact information available at
473# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla
474# It's shortly after 1:00 here on the east coast of the United States;
475# the staffer said it was shortly after 10:00 there. When I asked whether
476# that meant they were on Pacific time, they said no - they were on their
477# own time. I asked about daylight saving; they said it wasn't used. I
478# did not inquire about practices in the past.
479
480# From Arthur David Olson (2011-08-17):
481# For lack of better information, assume that Metlakatla's
482# abandonment of use of daylight saving resulted from the 1983 vote.
483
484# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
485Zone America/Juneau	 15:02:19 -	LMT	1867 Oct 18
486			 -8:57:41 -	LMT	1900 Aug 20 12:00
487			 -8:00	-	PST	1942
488			 -8:00	US	P%sT	1946
489			 -8:00	-	PST	1969
490			 -8:00	US	P%sT	1980 Apr 27  2:00
491			 -9:00	US	Y%sT	1980 Oct 26  2:00
492			 -8:00	US	P%sT	1983 Oct 30  2:00
493			 -9:00	US	Y%sT	1983 Nov 30
494			 -9:00	US	AK%sT
495Zone America/Sitka	 14:58:47 -	LMT	1867 Oct 18
496			 -9:01:13 -	LMT	1900 Aug 20 12:00
497			 -8:00	-	PST	1942
498			 -8:00	US	P%sT	1946
499			 -8:00	-	PST	1969
500			 -8:00	US	P%sT	1983 Oct 30  2:00
501			 -9:00	US	Y%sT	1983 Nov 30
502			 -9:00	US	AK%sT
503Zone America/Metlakatla	 15:13:42 -	LMT	1867 Oct 18
504			 -8:46:18 -	LMT	1900 Aug 20 12:00
505			 -8:00	-	PST	1942
506			 -8:00	US	P%sT	1946
507			 -8:00	-	PST	1969
508			 -8:00	US	P%sT	1983 Oct 30  2:00
509			 -8:00	-	PST
510Zone America/Yakutat	 14:41:05 -	LMT	1867 Oct 18
511			 -9:18:55 -	LMT	1900 Aug 20 12:00
512			 -9:00	-	YST	1942
513			 -9:00	US	Y%sT	1946
514			 -9:00	-	YST	1969
515			 -9:00	US	Y%sT	1983 Nov 30
516			 -9:00	US	AK%sT
517Zone America/Anchorage	 14:00:24 -	LMT	1867 Oct 18
518			 -9:59:36 -	LMT	1900 Aug 20 12:00
519			-10:00	-	CAT	1942
520			-10:00	US	CAT/CAWT 1945 Aug 14 23:00u
521			-10:00	US	CAT/CAPT 1946 # Peace
522			-10:00	-	CAT	1967 Apr
523			-10:00	-	AHST	1969
524			-10:00	US	AH%sT	1983 Oct 30  2:00
525			 -9:00	US	Y%sT	1983 Nov 30
526			 -9:00	US	AK%sT
527Zone America/Nome	 12:58:21 -	LMT	1867 Oct 18
528			-11:01:38 -	LMT	1900 Aug 20 12:00
529			-11:00	-	NST	1942
530			-11:00	US	N%sT	1946
531			-11:00	-	NST	1967 Apr
532			-11:00	-	BST	1969
533			-11:00	US	B%sT	1983 Oct 30  2:00
534			 -9:00	US	Y%sT	1983 Nov 30
535			 -9:00	US	AK%sT
536Zone America/Adak	 12:13:21 -	LMT	1867 Oct 18
537			-11:46:38 -	LMT	1900 Aug 20 12:00
538			-11:00	-	NST	1942
539			-11:00	US	N%sT	1946
540			-11:00	-	NST	1967 Apr
541			-11:00	-	BST	1969
542			-11:00	US	B%sT	1983 Oct 30  2:00
543			-10:00	US	AH%sT	1983 Nov 30
544			-10:00	US	H%sT
545# The following switches don't quite make our 1970 cutoff.
546#
547# Shanks writes that part of southwest Alaska (e.g. Aniak)
548# switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
549# and another part (e.g. Akiak) made the same switch five weeks later.
550#
551# From David Flater (2004-11-09):
552# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska
553# Historic Preservation Commission, provided this information, which
554# suggests that Unalaska deviated from statutory time from early 1967
555# possibly until 1983:
556#
557#  Minutes of the Unalaska City Council Meeting, January 10, 1967:
558#  "Except for St. Paul and Akutan, Unalaska is the only important
559#  location not on Alaska Standard Time.  The following resolution was
560#  made by William Robinson and seconded by Henry Swanson: Be it
561#  resolved that the City of Unalaska hereby goes to Alaska Standard
562#  Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday,
563#  January 14, Alaska Standard Time.)  This resolution was passed with
564#  three votes for and one against."
565
566# Hawaii
567
568# From Arthur David Olson (2010-12-09):
569# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225
570# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09,
571# the article is available at
572# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf
573# and indicates that standard time was adopted effective noon, January
574# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight
575# saving for the period between the last Sunday of each April and the
576# last Sunday of each September, but less than a month later repealed the
577# act," (page 220), that year-round daylight saving time was in effect
578# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for
579# when clocks changed) and that clocks were changed by 30 minutes
580# effective the second Sunday of June, 1947 (page 219, with no time of
581# day given for when clocks changed). A footnote for the 1933 changes
582# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933)
583# and Act 163 (approved 21 May 1933)."
584
585# From Arthur David Olson (2011-01-19):
586# The following is from "Laws of the Territory of Hawaii Passed by the
587# Seventeenth Legislature: Regular Session 1933," available (as of
588# 2011-01-19) at American University's Pence Law Library. Page 85: "Act
589# 90...At 2 o'clock ante meridian of the last Sunday in April of each
590# year, the standard time of this Territory shall be advanced one
591# hour...This Act shall take effect upon its approval. Approved this 26th
592# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of
593# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is
594# hereby repealed...This Act shall take effect upon its approval, upon
595# which date the standard time of this Territory shall be restored to
596# that existing immediately prior to the taking effect of said Act 90.
597# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor
598# of the Territory of Hawaii."
599#
600# Note that 1933-05-21 was a Sunday.
601# We're left to guess the time of day when Act 163 was approved; guess noon.
602
603# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
604Zone Pacific/Honolulu	-10:31:26 -	LMT	1896 Jan 13 12:00
605			-10:30	-	HST	1933 Apr 30  2:00
606			-10:30	1:00	HDT	1933 May 21 12:00
607			-10:30	-	HST	1942 Feb  9  2:00
608			-10:30	1:00	HDT	1945 Sep 30  2:00
609			-10:30	-	HST	1947 Jun  8  2:00
610			-10:00	-	HST
611Link Pacific/Honolulu Pacific/Johnston
612
613# Now we turn to US areas that have diverged from the consensus since 1970.
614
615# Arizona mostly uses MST.
616
617# From Paul Eggert (2002-10-20):
618#
619# The information in the rest of this paragraph is derived from the
620# Daylight Saving Time web page
621# <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23)
622# maintained by the Arizona State Library, Archives and Public Records.
623# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
624# time, but by federal law railroads, airlines, bus lines, military
625# personnel, and some engaged in interstate commerce continued to
626# observe war (i.e., daylight saving) time.  The 1944-03-17 Phoenix
627# Gazette says that was the date the law changed, and that 04-01 was
628# the date the state's clocks would change.  In 1945 the State of
629# Arizona used standard time all year, again with exceptions only as
630# mandated by federal law.  Arizona observed DST in 1967, but Arizona
631# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
632#
633# Shanks says the 1944 experiment came to an end on 1944-03-17.
634# Go with the Arizona State Library instead.
635
636# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
637Zone America/Phoenix	-7:28:18 -	LMT	1883 Nov 18 11:31:42
638			-7:00	US	M%sT	1944 Jan  1  0:01
639			-7:00	-	MST	1944 Apr  1  0:01
640			-7:00	US	M%sT	1944 Oct  1  0:01
641			-7:00	-	MST	1967
642			-7:00	US	M%sT	1968 Mar 21
643			-7:00	-	MST
644# From Arthur David Olson (1988-02-13):
645# A writer from the Inter Tribal Council of Arizona, Inc.,
646# notes in private correspondence dated 1987-12-28 that "Presently, only the
647# Navajo Nation participates in the Daylight Saving Time policy, due to its
648# large size and location in three states."  (The "only" means that other
649# tribal nations don't use DST.)
650#
651# From Paul Eggert (2013-08-26):
652# See America/Denver for a zone appropriate for the Navajo Nation.
653
654# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
655# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
656# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
657# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
658# Teton, Twin Falls, Valley, Washington counties, and the southern
659# quarter of Idaho county) and eastern Oregon (most of Malheur County)
660# switched four weeks late in 1974.
661#
662# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
663Zone America/Boise	-7:44:49 -	LMT	1883 Nov 18 12:15:11
664			-8:00	US	P%sT	1923 May 13  2:00
665			-7:00	US	M%sT	1974
666			-7:00	-	MST	1974 Feb  3  2:00
667			-7:00	US	M%sT
668
669# Indiana
670#
671# For a map of Indiana's time zone regions, see:
672# http://en.wikipedia.org/wiki/Time_in_Indiana
673#
674# From Paul Eggert (2007-08-17):
675# Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
676# with the following exceptions:
677#
678# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
679#   Vanderburgh, and Warrick counties have been like America/Chicago.
680#
681# - Dearborn and Ohio counties have been like America/New_York.
682#
683# - Clark, Floyd, and Harrison counties have been like
684#   America/Kentucky/Louisville.
685#
686# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke,
687#   and Switzerland counties have their own time zone histories as noted below.
688#
689# Shanks partitioned Indiana into 345 regions, each with its own time history,
690# and wrote "Even newspaper reports present contradictory information."
691# Those Hoosiers!  Such a flighty and changeable people!
692# Fortunately, most of the complexity occurred before our cutoff date of 1970.
693#
694# Other than Indianapolis, the Indiana place names are so nondescript
695# that they would be ambiguous if we left them at the 'America' level.
696# So we reluctantly put them all in a subdirectory 'America/Indiana'.
697
698# From Paul Eggert (2014-06-26):
699# https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana
700# says "DOT is relocating the time zone boundary in Indiana to move Starke,
701# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the
702# Eastern Time Zone to the Central Time Zone.... The effective date of
703# this rule is 2 a.m. EST Sunday, April 2, 2006, which is the
704# changeover date from standard time to Daylight Saving Time."
705# Strictly speaking, this meant the affected counties changed their
706# clocks twice that night, but this obviously was in error.  The intent
707# was that 01:59:59 EST be followed by 02:00:00 CDT.
708
709# From Gwillim Law (2007-02-10):
710# The Associated Press has been reporting that Pulaski County, Indiana is
711# going to switch from Central to Eastern Time on March 11, 2007....
712# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL
713
714# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
715Rule Indianapolis 1941	only	-	Jun	22	2:00	1:00	D
716Rule Indianapolis 1941	1954	-	Sep	lastSun	2:00	0	S
717Rule Indianapolis 1946	1954	-	Apr	lastSun	2:00	1:00	D
718# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
719Zone America/Indiana/Indianapolis -5:44:38 - LMT	1883 Nov 18 12:15:22
720			-6:00	US	C%sT	1920
721			-6:00 Indianapolis C%sT	1942
722			-6:00	US	C%sT	1946
723			-6:00 Indianapolis C%sT	1955 Apr 24  2:00
724			-5:00	-	EST	1957 Sep 29  2:00
725			-6:00	-	CST	1958 Apr 27  2:00
726			-5:00	-	EST	1969
727			-5:00	US	E%sT	1971
728			-5:00	-	EST	2006
729			-5:00	US	E%sT
730#
731# Eastern Crawford County, Indiana, left its clocks alone in 1974,
732# as well as from 1976 through 2005.
733# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
734Rule	Marengo	1951	only	-	Apr	lastSun	2:00	1:00	D
735Rule	Marengo	1951	only	-	Sep	lastSun	2:00	0	S
736Rule	Marengo	1954	1960	-	Apr	lastSun	2:00	1:00	D
737Rule	Marengo	1954	1960	-	Sep	lastSun	2:00	0	S
738# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
739Zone America/Indiana/Marengo -5:45:23 -	LMT	1883 Nov 18 12:14:37
740			-6:00	US	C%sT	1951
741			-6:00	Marengo	C%sT	1961 Apr 30  2:00
742			-5:00	-	EST	1969
743			-5:00	US	E%sT	1974 Jan  6  2:00
744			-6:00	1:00	CDT	1974 Oct 27  2:00
745			-5:00	US	E%sT	1976
746			-5:00	-	EST	2006
747			-5:00	US	E%sT
748#
749# Daviess, Dubois, Knox, and Martin Counties, Indiana,
750# switched from eastern to central time in April 2006, then switched back
751# in November 2007.
752# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
753Rule Vincennes	1946	only	-	Apr	lastSun	2:00	1:00	D
754Rule Vincennes	1946	only	-	Sep	lastSun	2:00	0	S
755Rule Vincennes	1953	1954	-	Apr	lastSun	2:00	1:00	D
756Rule Vincennes	1953	1959	-	Sep	lastSun	2:00	0	S
757Rule Vincennes	1955	only	-	May	 1	0:00	1:00	D
758Rule Vincennes	1956	1963	-	Apr	lastSun	2:00	1:00	D
759Rule Vincennes	1960	only	-	Oct	lastSun	2:00	0	S
760Rule Vincennes	1961	only	-	Sep	lastSun	2:00	0	S
761Rule Vincennes	1962	1963	-	Oct	lastSun	2:00	0	S
762# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
763Zone America/Indiana/Vincennes -5:50:07 - LMT	1883 Nov 18 12:09:53
764			-6:00	US	C%sT	1946
765			-6:00 Vincennes	C%sT	1964 Apr 26  2:00
766			-5:00	-	EST	1969
767			-5:00	US	E%sT	1971
768			-5:00	-	EST	2006 Apr  2  2:00
769			-6:00	US	C%sT	2007 Nov  4  2:00
770			-5:00	US	E%sT
771#
772# Perry County, Indiana, switched from eastern to central time in April 2006.
773# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
774Rule Perry	1946	only	-	Apr	lastSun	2:00	1:00	D
775Rule Perry	1946	only	-	Sep	lastSun	2:00	0	S
776Rule Perry	1953	1954	-	Apr	lastSun	2:00	1:00	D
777Rule Perry	1953	1959	-	Sep	lastSun	2:00	0	S
778Rule Perry	1955	only	-	May	 1	0:00	1:00	D
779Rule Perry	1956	1963	-	Apr	lastSun	2:00	1:00	D
780Rule Perry	1960	only	-	Oct	lastSun	2:00	0	S
781Rule Perry	1961	only	-	Sep	lastSun	2:00	0	S
782Rule Perry	1962	1963	-	Oct	lastSun	2:00	0	S
783# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
784Zone America/Indiana/Tell_City -5:47:03 - LMT	1883 Nov 18 12:12:57
785			-6:00	US	C%sT	1946
786			-6:00 Perry	C%sT	1964 Apr 26  2:00
787			-5:00	-	EST	1969
788			-5:00	US	E%sT	1971
789			-5:00	-	EST	2006 Apr  2  2:00
790			-6:00	US	C%sT
791#
792# Pike County, Indiana moved from central to eastern time in 1977,
793# then switched back in 2006, then switched back again in 2007.
794# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
795Rule	Pike	1955	only	-	May	 1	0:00	1:00	D
796Rule	Pike	1955	1960	-	Sep	lastSun	2:00	0	S
797Rule	Pike	1956	1964	-	Apr	lastSun	2:00	1:00	D
798Rule	Pike	1961	1964	-	Oct	lastSun	2:00	0	S
799# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
800Zone America/Indiana/Petersburg -5:49:07 - LMT	1883 Nov 18 12:10:53
801			-6:00	US	C%sT	1955
802			-6:00	Pike	C%sT	1965 Apr 25  2:00
803			-5:00	-	EST	1966 Oct 30  2:00
804			-6:00	US	C%sT	1977 Oct 30  2:00
805			-5:00	-	EST	2006 Apr  2  2:00
806			-6:00	US	C%sT	2007 Nov  4  2:00
807			-5:00	US	E%sT
808#
809# Starke County, Indiana moved from central to eastern time in 1991,
810# then switched back in 2006.
811# From Arthur David Olson (1991-10-28):
812# An article on page A3 of the Sunday, 1991-10-27 Washington Post
813# notes that Starke County switched from Central time to Eastern time as of
814# 1991-10-27.
815# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
816Rule	Starke	1947	1961	-	Apr	lastSun	2:00	1:00	D
817Rule	Starke	1947	1954	-	Sep	lastSun	2:00	0	S
818Rule	Starke	1955	1956	-	Oct	lastSun	2:00	0	S
819Rule	Starke	1957	1958	-	Sep	lastSun	2:00	0	S
820Rule	Starke	1959	1961	-	Oct	lastSun	2:00	0	S
821# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
822Zone America/Indiana/Knox -5:46:30 -	LMT	1883 Nov 18 12:13:30
823			-6:00	US	C%sT	1947
824			-6:00	Starke	C%sT	1962 Apr 29  2:00
825			-5:00	-	EST	1963 Oct 27  2:00
826			-6:00	US	C%sT	1991 Oct 27  2:00
827			-5:00	-	EST	2006 Apr  2  2:00
828			-6:00	US	C%sT
829#
830# Pulaski County, Indiana, switched from eastern to central time in
831# April 2006 and then switched back in March 2007.
832# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
833Rule	Pulaski	1946	1960	-	Apr	lastSun	2:00	1:00	D
834Rule	Pulaski	1946	1954	-	Sep	lastSun	2:00	0	S
835Rule	Pulaski	1955	1956	-	Oct	lastSun	2:00	0	S
836Rule	Pulaski	1957	1960	-	Sep	lastSun	2:00	0	S
837# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
838Zone America/Indiana/Winamac -5:46:25 - LMT	1883 Nov 18 12:13:35
839			-6:00	US	C%sT	1946
840			-6:00	Pulaski	C%sT	1961 Apr 30  2:00
841			-5:00	-	EST	1969
842			-5:00	US	E%sT	1971
843			-5:00	-	EST	2006 Apr  2  2:00
844			-6:00	US	C%sT	2007 Mar 11  2:00
845			-5:00	US	E%sT
846#
847# Switzerland County, Indiana, did not observe DST from 1973 through 2005.
848# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
849Zone America/Indiana/Vevay -5:40:16 -	LMT	1883 Nov 18 12:19:44
850			-6:00	US	C%sT	1954 Apr 25  2:00
851			-5:00	-	EST	1969
852			-5:00	US	E%sT	1973
853			-5:00	-	EST	2006
854			-5:00	US	E%sT
855
856# Part of Kentucky left its clocks alone in 1974.
857# This also includes Clark, Floyd, and Harrison counties in Indiana.
858# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
859Rule Louisville	1921	only	-	May	1	2:00	1:00	D
860Rule Louisville	1921	only	-	Sep	1	2:00	0	S
861Rule Louisville	1941	1961	-	Apr	lastSun	2:00	1:00	D
862Rule Louisville	1941	only	-	Sep	lastSun	2:00	0	S
863Rule Louisville	1946	only	-	Jun	2	2:00	0	S
864Rule Louisville	1950	1955	-	Sep	lastSun	2:00	0	S
865Rule Louisville	1956	1960	-	Oct	lastSun	2:00	0	S
866# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
867Zone America/Kentucky/Louisville -5:43:02 -	LMT	1883 Nov 18 12:16:58
868			-6:00	US	C%sT	1921
869			-6:00 Louisville C%sT	1942
870			-6:00	US	C%sT	1946
871			-6:00 Louisville C%sT	1961 Jul 23  2:00
872			-5:00	-	EST	1968
873			-5:00	US	E%sT	1974 Jan  6  2:00
874			-6:00	1:00	CDT	1974 Oct 27  2:00
875			-5:00	US	E%sT
876#
877# Wayne County, Kentucky
878#
879# From Lake Cumberland LIFE
880# http://www.lake-cumberland.com/life/archive/news990129time.shtml
881# (1999-01-29) via WKYM-101.7:
882# Clinton County has joined Wayne County in asking the DoT to change from
883# the Central to the Eastern time zone....  The Wayne County government made
884# the same request in December.  And while Russell County officials have not
885# taken action, the majority of respondents to a poll conducted there in
886# August indicated they would like to change to "fast time" also.
887# The three Lake Cumberland counties are the farthest east of any U.S.
888# location in the Central time zone.
889#
890# From Rich Wales (2000-08-29):
891# After prolonged debate, and despite continuing deep differences of opinion,
892# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
893# (-0500) time.  They won't "fall back" this year.  See Sara Shipley,
894# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
895#
896# From Paul Eggert (2001-07-16):
897# The final rule was published in the
898# Federal Register 65, 160 (2000-08-17), pp 50154-50158.
899# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22
900#
901Zone America/Kentucky/Monticello -5:39:24 - LMT	1883 Nov 18 12:20:36
902			-6:00	US	C%sT	1946
903			-6:00	-	CST	1968
904			-6:00	US	C%sT	2000 Oct 29  2:00
905			-5:00	US	E%sT
906
907
908# From Rives McDow (2000-08-30):
909# Here ... are all the changes in the US since 1985.
910# Kearny County, KS (put all of county on central;
911#	previously split between MST and CST) ... 1990-10
912# Starke County, IN (from CST to EST) ... 1991-10
913# Oliver County, ND (from MST to CST) ... 1992-10
914# West Wendover, NV (from PST TO MST) ... 1999-10
915# Wayne County, KY (from CST to EST) ... 2000-10
916#
917# From Paul Eggert (2001-07-17):
918# We don't know where the line used to be within Kearny County, KS,
919# so omit that change for now.
920# See America/Indiana/Knox for the Starke County, IN change.
921# See America/North_Dakota/Center for the Oliver County, ND change.
922# West Wendover, NV officially switched from Pacific to mountain time on
923# 1999-10-31.  See the
924# Federal Register 64, 203 (1999-10-21), pp 56705-56707.
925# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15
926# However, the Federal Register says that West Wendover already operated
927# on mountain time, and the rule merely made this official;
928# hence a separate tz entry is not needed.
929
930# Michigan
931#
932# From Bob Devine (1988-01-28):
933# Michigan didn't observe DST from 1968 to 1973.
934#
935# From Paul Eggert (1999-03-31):
936# Shanks writes that Michigan started using standard time on 1885-09-18,
937# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01)
938# that Detroit kept
939#
940#	local time until 1900 when the City Council decreed that clocks should
941#	be put back twenty-eight minutes to Central Standard Time.  Half the
942#	city obeyed, half refused.  After considerable debate, the decision
943#	was rescinded and the city reverted to Sun time.  A derisive offer to
944#	erect a sundial in front of the city hall was referred to the
945#	Committee on Sewers.  Then, in 1905, Central time was adopted
946#	by city vote.
947#
948# This story is too entertaining to be false, so go with Howse over Shanks.
949#
950# From Paul Eggert (2001-03-06):
951# Garland (1927) writes "Cleveland and Detroit advanced their clocks
952# one hour in 1914."  This change is not in Shanks.  We have no more
953# info, so omit this for now.
954#
955# Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
956# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
957Rule	Detroit	1948	only	-	Apr	lastSun	2:00	1:00	D
958Rule	Detroit	1948	only	-	Sep	lastSun	2:00	0	S
959Rule	Detroit	1967	only	-	Jun	14	2:00	1:00	D
960Rule	Detroit	1967	only	-	Oct	lastSun	2:00	0	S
961# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
962Zone America/Detroit	-5:32:11 -	LMT	1905
963			-6:00	-	CST	1915 May 15  2:00
964			-5:00	-	EST	1942
965			-5:00	US	E%sT	1946
966			-5:00	Detroit	E%sT	1973
967			-5:00	US	E%sT	1975
968			-5:00	-	EST	1975 Apr 27  2:00
969			-5:00	US	E%sT
970#
971# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan,
972# switched from EST to CST/CDT in 1973.
973# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
974Rule Menominee	1946	only	-	Apr	lastSun	2:00	1:00	D
975Rule Menominee	1946	only	-	Sep	lastSun	2:00	0	S
976Rule Menominee	1966	only	-	Apr	lastSun	2:00	1:00	D
977Rule Menominee	1966	only	-	Oct	lastSun	2:00	0	S
978# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
979Zone America/Menominee	-5:50:27 -	LMT	1885 Sep 18 12:00
980			-6:00	US	C%sT	1946
981			-6:00 Menominee	C%sT	1969 Apr 27  2:00
982			-5:00	-	EST	1973 Apr 29  2:00
983			-6:00	US	C%sT
984
985# Navassa
986# administered by the US Fish and Wildlife Service
987# claimed by US under the provisions of the 1856 Guano Islands Act
988# also claimed by Haiti
989# occupied 1857/1900 by the Navassa Phosphate Co
990# US lighthouse 1917/1996-09
991# currently uninhabited
992# see Mark Fineman, "An Isle Rich in Guano and Discord",
993# _Los Angeles Times_ (1998-11-10), A1, A10; it cites
994# Jimmy Skaggs, _The Great Guano Rush_ (1994).
995
996################################################################################
997
998
999# From Paul Eggert (2014-10-31):
1000#
1001# Unless otherwise specified, the source for data through 1990 is:
1002# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
1003# San Diego: ACS Publications, Inc. (2003).
1004# Unfortunately this book contains many errors and cites no sources.
1005#
1006# Gwillim Law writes that a good source
1007# for recent time zone data is the International Air Transport
1008# Association's Standard Schedules Information Manual (IATA SSIM),
1009# published semiannually.  Law sent in several helpful summaries
1010# of the IATA's data after 1990.  Except where otherwise noted,
1011# IATA SSIM is the source for entries after 1990.
1012#
1013# Other sources occasionally used include:
1014#
1015#	Edward W. Whitman, World Time Differences,
1016#	Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
1017#	which I found in the UCLA library.
1018#
1019#	William Willett, The Waste of Daylight, 19th edition
1020#	<http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf>
1021#	[PDF] (1914-03)
1022#
1023#	Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
1024#	<http://www.jstor.org/stable/1774359>.
1025#
1026# See the 'europe' file for Greenland.
1027
1028# Canada
1029
1030# From Alain LaBonté (1994-11-14):
1031# I post here the time zone abbreviations standardized in Canada
1032# for both English and French in the CAN/CSA-Z234.4-89 standard....
1033#
1034#	UTC	Standard time	Daylight saving time
1035#	offset	French	English	French	English
1036#	-2:30	-	-	HAT	NDT
1037#	-3	-	-	HAA	ADT
1038#	-3:30	HNT	NST	-	-
1039#	-4	HNA	AST	HAE	EDT
1040#	-5	HNE	EST	HAC	CDT
1041#	-6	HNC	CST	HAR	MDT
1042#	-7	HNR	MST	HAP	PDT
1043#	-8	HNP	PST	HAY	YDT
1044#	-9	HNY	YST	-	-
1045#
1046#	HN: Heure Normale	ST: Standard Time
1047#	HA: Heure Avancée	DT: Daylight saving Time
1048#
1049#	A: de l'Atlantique	Atlantic
1050#	C: du Centre		Central
1051#	E: de l'Est		Eastern
1052#	M:			Mountain
1053#	N:			Newfoundland
1054#	P: du Pacifique		Pacific
1055#	R: des Rocheuses
1056#	T: de Terre-Neuve
1057#	Y: du Yukon		Yukon
1058#
1059# From Paul Eggert (1994-11-22):
1060# Alas, this sort of thing must be handled by localization software.
1061
1062# Unless otherwise specified, the data entries for Canada are all from Shanks
1063# & Pottenger.
1064
1065# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31,
1066# 2007-03-01):
1067# The British Columbia government announced yesterday that it will
1068# adjust daylight savings next year to align with changes in the
1069# U.S. and the rest of Canada....
1070# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm
1071# ...
1072# Nova Scotia
1073# Daylight saving time will be extended by four weeks starting in 2007....
1074# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf
1075#
1076# [For New Brunswick] the new legislation dictates that the time change is to
1077# be done at 02:00 instead of 00:01.
1078# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf
1079# ...
1080# Manitoba has traditionally changed the clock every fall at 03:00.
1081# As of 2006, the transition is to take place one hour earlier at 02:00.
1082# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php
1083# ...
1084# [Alberta, Ontario, Quebec] will follow US rules.
1085# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM
1086# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm
1087# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF
1088# ...
1089# P.E.I. will follow US rules....
1090# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf
1091# ...
1092# Province of Newfoundland and Labrador....
1093# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm
1094# ...
1095# Yukon
1096# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf
1097# ...
1098# N.W.T. will follow US rules.  Whoever maintains the government web site
1099# does not seem to believe in bookmarks.  To see the news release, click the
1100# following link and search for "Daylight Savings Time Change".  Press the
1101# "Daylight Savings Time Change" link; it will fire off a popup using
1102# JavaScript.
1103# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive
1104# ...
1105# Nunavut
1106# An amendment to the Interpretation Act was registered on February 19/2007....
1107# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf
1108
1109# From Paul Eggert (2014-10-18):
1110# H. David Matthews and Mary Vincent's map
1111# "It's about TIME", _Canadian Geographic_ (September-October 1998)
1112# http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp
1113# contains detailed boundaries for regions observing nonstandard
1114# time and daylight saving time arrangements in Canada circa 1998.
1115#
1116# National Research Council Canada maintains info about time zones and DST.
1117# http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html
1118# http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5
1119# Its unofficial information is often taken from Matthews and Vincent.
1120
1121# From Paul Eggert (2006-06-27):
1122# For now, assume all of DST-observing Canada will fall into line with the
1123# new US DST rules,
1124
1125# From Chris Walton (2011-12-01)
1126# In the first of Tammy Hardwick's articles
1127# http://www.ilovecreston.com/?p=articles&t=spec&ar=260
1128# she quotes the Friday November 1/1918 edition of the Creston Review.
1129# The quote includes these two statements:
1130# 'Sunday the CPR went back to the old system of time...'
1131# '... The daylight saving scheme was dropped all over Canada at the same time,'
1132# These statements refer to a transition from daylight time to standard time
1133# that occurred nationally on Sunday October 27/1918.  This transition was
1134# also documented in the Saturday October 26/1918 edition of the Toronto Star.
1135
1136# In light of that evidence, we alter the date from the earlier believed
1137# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day
1138# than Thursday) in all Canadian rulesets.
1139
1140# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1141Rule	Canada	1918	only	-	Apr	14	2:00	1:00	D
1142Rule	Canada	1918	only	-	Oct	27	2:00	0	S
1143Rule	Canada	1942	only	-	Feb	 9	2:00	1:00	W # War
1144Rule	Canada	1945	only	-	Aug	14	23:00u	1:00	P # Peace
1145Rule	Canada	1945	only	-	Sep	30	2:00	0	S
1146Rule	Canada	1974	1986	-	Apr	lastSun	2:00	1:00	D
1147Rule	Canada	1974	2006	-	Oct	lastSun	2:00	0	S
1148Rule	Canada	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
1149Rule	Canada	2007	max	-	Mar	Sun>=8	2:00	1:00	D
1150Rule	Canada	2007	max	-	Nov	Sun>=1	2:00	0	S
1151
1152
1153# Newfoundland and Labrador
1154
1155# From Paul Eggert (2000-10-02):
1156# Matthews and Vincent (1998) write that Labrador should use NST/NDT,
1157# but the only part of Labrador that follows the rules is the
1158# southeast corner, including Port Hope Simpson and Mary's Harbour,
1159# but excluding, say, Black Tickle.
1160
1161# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1162Rule	StJohns	1917	only	-	Apr	 8	2:00	1:00	D
1163Rule	StJohns	1917	only	-	Sep	17	2:00	0	S
1164# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger.
1165Rule	StJohns	1919	only	-	May	 5	23:00	1:00	D
1166Rule	StJohns	1919	only	-	Aug	12	23:00	0	S
1167# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger.
1168Rule	StJohns	1920	1935	-	May	Sun>=1	23:00	1:00	D
1169Rule	StJohns	1920	1935	-	Oct	lastSun	23:00	0	S
1170# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks &
1171# Pottenger.
1172Rule	StJohns	1936	1941	-	May	Mon>=9	0:00	1:00	D
1173Rule	StJohns	1936	1941	-	Oct	Mon>=2	0:00	0	S
1174# Whitman gives the following transitions:
1175# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07
1176# but go with Shanks & Pottenger and assume they used Canadian rules.
1177# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
1178# Apr 30 - Sep 24; go with Shanks & Pottenger.
1179Rule	StJohns	1946	1950	-	May	Sun>=8	2:00	1:00	D
1180Rule	StJohns	1946	1950	-	Oct	Sun>=2	2:00	0	S
1181Rule	StJohns	1951	1986	-	Apr	lastSun	2:00	1:00	D
1182Rule	StJohns	1951	1959	-	Sep	lastSun	2:00	0	S
1183Rule	StJohns	1960	1986	-	Oct	lastSun	2:00	0	S
1184# From Paul Eggert (2000-10-02):
1185# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
1186# at 00:01 local time.  For now, assume it started in 1987.
1187
1188# From Michael Pelley (2011-09-12):
1189# We received today, Monday, September 12, 2011, notification that the
1190# changes to the Newfoundland Standard Time Act have been proclaimed.
1191# The change in the Act stipulates that the change from Daylight Savings
1192# Time to Standard Time and from Standard Time to Daylight Savings Time
1193# now occurs at 2:00AM.
1194# ...
1195# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm
1196# ...
1197# MICHAEL PELLEY  |  Manager of Enterprise Architecture - Solution Delivery
1198# Office of the Chief Information Officer
1199# Executive Council
1200# Government of Newfoundland & Labrador
1201
1202Rule	StJohns	1987	only	-	Apr	Sun>=1	0:01	1:00	D
1203Rule	StJohns	1987	2006	-	Oct	lastSun	0:01	0	S
1204Rule	StJohns	1988	only	-	Apr	Sun>=1	0:01	2:00	DD
1205Rule	StJohns	1989	2006	-	Apr	Sun>=1	0:01	1:00	D
1206Rule	StJohns	2007	2011	-	Mar	Sun>=8	0:01	1:00	D
1207Rule	StJohns	2007	2010	-	Nov	Sun>=1	0:01	0	S
1208#
1209# St John's has an apostrophe, but Posix file names can't have apostrophes.
1210# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1211Zone America/St_Johns	-3:30:52 -	LMT	1884
1212			-3:30:52 StJohns N%sT	1918
1213			-3:30:52 Canada	N%sT	1919
1214			-3:30:52 StJohns N%sT	1935 Mar 30
1215			-3:30	StJohns	N%sT	1942 May 11
1216			-3:30	Canada	N%sT	1946
1217			-3:30	StJohns	N%sT	2011 Nov
1218			-3:30	Canada	N%sT
1219
1220# most of east Labrador
1221
1222# The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'.
1223# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1224Zone America/Goose_Bay	-4:01:40 -	LMT	1884 # Happy Valley-Goose Bay
1225			-3:30:52 -	NST	1918
1226			-3:30:52 Canada N%sT	1919
1227			-3:30:52 -	NST	1935 Mar 30
1228			-3:30	-	NST	1936
1229			-3:30	StJohns	N%sT	1942 May 11
1230			-3:30	Canada	N%sT	1946
1231			-3:30	StJohns	N%sT	1966 Mar 15  2:00
1232			-4:00	StJohns	A%sT	2011 Nov
1233			-4:00	Canada	A%sT
1234
1235
1236# west Labrador, Nova Scotia, Prince Edward I
1237
1238# From Paul Eggert (2006-03-22):
1239# Shanks & Pottenger write that since 1970 most of this region has been like
1240# Halifax.  Many locales did not observe peacetime DST until 1972;
1241# Glace Bay, NS is the largest that we know of.
1242# Shanks & Pottenger also write that Liverpool, NS was the only town
1243# in Canada to observe DST in 1971 but not 1970; for now we'll assume
1244# this is a typo.
1245
1246# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1247Rule	Halifax	1916	only	-	Apr	 1	0:00	1:00	D
1248Rule	Halifax	1916	only	-	Oct	 1	0:00	0	S
1249Rule	Halifax	1920	only	-	May	 9	0:00	1:00	D
1250Rule	Halifax	1920	only	-	Aug	29	0:00	0	S
1251Rule	Halifax	1921	only	-	May	 6	0:00	1:00	D
1252Rule	Halifax	1921	1922	-	Sep	 5	0:00	0	S
1253Rule	Halifax	1922	only	-	Apr	30	0:00	1:00	D
1254Rule	Halifax	1923	1925	-	May	Sun>=1	0:00	1:00	D
1255Rule	Halifax	1923	only	-	Sep	 4	0:00	0	S
1256Rule	Halifax	1924	only	-	Sep	15	0:00	0	S
1257Rule	Halifax	1925	only	-	Sep	28	0:00	0	S
1258Rule	Halifax	1926	only	-	May	16	0:00	1:00	D
1259Rule	Halifax	1926	only	-	Sep	13	0:00	0	S
1260Rule	Halifax	1927	only	-	May	 1	0:00	1:00	D
1261Rule	Halifax	1927	only	-	Sep	26	0:00	0	S
1262Rule	Halifax	1928	1931	-	May	Sun>=8	0:00	1:00	D
1263Rule	Halifax	1928	only	-	Sep	 9	0:00	0	S
1264Rule	Halifax	1929	only	-	Sep	 3	0:00	0	S
1265Rule	Halifax	1930	only	-	Sep	15	0:00	0	S
1266Rule	Halifax	1931	1932	-	Sep	Mon>=24	0:00	0	S
1267Rule	Halifax	1932	only	-	May	 1	0:00	1:00	D
1268Rule	Halifax	1933	only	-	Apr	30	0:00	1:00	D
1269Rule	Halifax	1933	only	-	Oct	 2	0:00	0	S
1270Rule	Halifax	1934	only	-	May	20	0:00	1:00	D
1271Rule	Halifax	1934	only	-	Sep	16	0:00	0	S
1272Rule	Halifax	1935	only	-	Jun	 2	0:00	1:00	D
1273Rule	Halifax	1935	only	-	Sep	30	0:00	0	S
1274Rule	Halifax	1936	only	-	Jun	 1	0:00	1:00	D
1275Rule	Halifax	1936	only	-	Sep	14	0:00	0	S
1276Rule	Halifax	1937	1938	-	May	Sun>=1	0:00	1:00	D
1277Rule	Halifax	1937	1941	-	Sep	Mon>=24	0:00	0	S
1278Rule	Halifax	1939	only	-	May	28	0:00	1:00	D
1279Rule	Halifax	1940	1941	-	May	Sun>=1	0:00	1:00	D
1280Rule	Halifax	1946	1949	-	Apr	lastSun	2:00	1:00	D
1281Rule	Halifax	1946	1949	-	Sep	lastSun	2:00	0	S
1282Rule	Halifax	1951	1954	-	Apr	lastSun	2:00	1:00	D
1283Rule	Halifax	1951	1954	-	Sep	lastSun	2:00	0	S
1284Rule	Halifax	1956	1959	-	Apr	lastSun	2:00	1:00	D
1285Rule	Halifax	1956	1959	-	Sep	lastSun	2:00	0	S
1286Rule	Halifax	1962	1973	-	Apr	lastSun	2:00	1:00	D
1287Rule	Halifax	1962	1973	-	Oct	lastSun	2:00	0	S
1288# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1289Zone America/Halifax	-4:14:24 -	LMT	1902 Jun 15
1290			-4:00	Halifax	A%sT	1918
1291			-4:00	Canada	A%sT	1919
1292			-4:00	Halifax	A%sT	1942 Feb  9  2:00s
1293			-4:00	Canada	A%sT	1946
1294			-4:00	Halifax	A%sT	1974
1295			-4:00	Canada	A%sT
1296Zone America/Glace_Bay	-3:59:48 -	LMT	1902 Jun 15
1297			-4:00	Canada	A%sT	1953
1298			-4:00	Halifax	A%sT	1954
1299			-4:00	-	AST	1972
1300			-4:00	Halifax	A%sT	1974
1301			-4:00	Canada	A%sT
1302
1303# New Brunswick
1304
1305# From Paul Eggert (2007-01-31):
1306# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>
1307# says they changed at 00:01 through 2006, and
1308# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
1309# clear that this was the case since at least 1993.
1310# For now, assume it started in 1993.
1311
1312# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1313Rule	Moncton	1933	1935	-	Jun	Sun>=8	1:00	1:00	D
1314Rule	Moncton	1933	1935	-	Sep	Sun>=8	1:00	0	S
1315Rule	Moncton	1936	1938	-	Jun	Sun>=1	1:00	1:00	D
1316Rule	Moncton	1936	1938	-	Sep	Sun>=1	1:00	0	S
1317Rule	Moncton	1939	only	-	May	27	1:00	1:00	D
1318Rule	Moncton	1939	1941	-	Sep	Sat>=21	1:00	0	S
1319Rule	Moncton	1940	only	-	May	19	1:00	1:00	D
1320Rule	Moncton	1941	only	-	May	 4	1:00	1:00	D
1321Rule	Moncton	1946	1972	-	Apr	lastSun	2:00	1:00	D
1322Rule	Moncton	1946	1956	-	Sep	lastSun	2:00	0	S
1323Rule	Moncton	1957	1972	-	Oct	lastSun	2:00	0	S
1324Rule	Moncton	1993	2006	-	Apr	Sun>=1	0:01	1:00	D
1325Rule	Moncton	1993	2006	-	Oct	lastSun	0:01	0	S
1326# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1327Zone America/Moncton	-4:19:08 -	LMT	1883 Dec  9
1328			-5:00	-	EST	1902 Jun 15
1329			-4:00	Canada	A%sT	1933
1330			-4:00	Moncton	A%sT	1942
1331			-4:00	Canada	A%sT	1946
1332			-4:00	Moncton	A%sT	1973
1333			-4:00	Canada	A%sT	1993
1334			-4:00	Moncton	A%sT	2007
1335			-4:00	Canada	A%sT
1336
1337# Quebec
1338
1339# From Paul Eggert (2015-03-24):
1340# See America/Toronto for most of Quebec, including Montreal.
1341#
1342# Matthews and Vincent (1998) also write that Quebec east of the -63
1343# meridian is supposed to observe AST, but residents as far east as
1344# Natashquan use EST/EDT, and residents east of Natashquan use AST.
1345# The Quebec department of justice writes in
1346# "The situation in Minganie and Basse-Côte-Nord"
1347# http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm
1348# that the coastal strip from just east of Natashquan to Blanc-Sablon
1349# observes Atlantic standard time all year round.
1350# http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en
1351# says this common practice was codified into law as of 2007.
1352# For lack of better info, guess this practice began around 1970, contra to
1353# Shanks & Pottenger who have this region observing AST/ADT.
1354
1355# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1356Zone America/Blanc-Sablon -3:48:28 -	LMT	1884
1357			-4:00	Canada	A%sT	1970
1358			-4:00	-	AST
1359
1360# Ontario
1361
1362# From Paul Eggert (2006-07-09):
1363# Shanks & Pottenger write that since 1970 most of Ontario has been like
1364# Toronto.
1365# Thunder Bay skipped DST in 1973.
1366# Many smaller locales did not observe peacetime DST until 1974;
1367# Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1368# Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
1369
1370# From Mark Brader (2003-07-26):
1371# [According to the Toronto Star] Orillia, Ontario, adopted DST
1372# effective Saturday, 1912-06-22, 22:00; the article mentions that
1373# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
1374# have already done so.  In Orillia DST was to run until Saturday,
1375# 1912-08-31 (no time mentioned), but it was met with considerable
1376# hostility from certain segments of the public, and was revoked after
1377# only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but
1378# presumably that should be -07-06.  (1912-06-19, -07-12; also letters
1379# earlier in June).
1380#
1381# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).
1382
1383# From Paul Eggert (1997-10-17):
1384# Mark Brader writes that an article in the 1997-10-14 Toronto Star
1385# says that Atikokan, Ontario currently does not observe DST,
1386# but will vote on 11-10 whether to use EST/EDT.
1387# He also writes that the Ontario Time Act (1990, Chapter T.9)
1388# http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html
1389# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.
1390# Officially Atikokan is therefore on CST/CDT, and most likely this report
1391# concerns a non-official time observed as a matter of local practice.
1392#
1393# From Paul Eggert (2000-10-02):
1394# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and
1395# New Osnaburgh observe CST all year, that Big Trout Lake observes
1396# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in
1397# violation of the official Ontario rules.
1398#
1399# From Paul Eggert (2006-07-09):
1400# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the
1401# 2005-07-21 Chronicle-Journal, which said:
1402#
1403#	The clocks in Atikokan stay set on standard time year-round.
1404#	This means they spend about half the time on central time and
1405#	the other half on eastern time.
1406#
1407#	For the most part, the system works, Mayor Dennis Brown said.
1408#
1409#	"The majority of businesses in Atikokan deal more with Eastern
1410#	Canada, but there are some that deal with Western Canada," he
1411#	said.  "I don't see any changes happening here."
1412#
1413# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang
1414# [New Osnaburgh] follow the same practice."
1415
1416# From Garry McKinnon (2006-07-14) via Chris Walton:
1417# I chatted with a member of my board who has an outstanding memory
1418# and a long history in Atikokan (and in the telecom industry) and he
1419# can say for certain that Atikokan has been practicing the current
1420# time keeping since 1952, at least.
1421
1422# From Paul Eggert (2006-07-17):
1423# Shanks & Pottenger say that Atikokan has agreed with Rainy River
1424# ever since standard time was introduced, but the information from
1425# McKinnon sounds more authoritative.  For now, assume that Atikokan
1426# switched to EST immediately after WWII era daylight saving time
1427# ended.  This matches the old (less-populous) America/Coral_Harbour
1428# entry since our cutoff date of 1970, so we can move
1429# America/Coral_Harbour to the 'backward' file.
1430
1431# From Mark Brader (2010-03-06):
1432#
1433# Currently the database has:
1434#
1435# # Ontario
1436#
1437# # From Paul Eggert (2006-07-09):
1438# # Shanks & Pottenger write that since 1970 most of Ontario has been like
1439# # Toronto.
1440# # Thunder Bay skipped DST in 1973.
1441# # Many smaller locales did not observe peacetime DST until 1974;
1442# # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1443#
1444# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom
1445# right corner of page 1, it says that Toronto will return to standard
1446# time at 2 am Sunday morning (which agrees with the database), and that:
1447#
1448#     The one-hour setback will go into effect throughout most of Ontario,
1449#     except in areas like Windsor which remains on standard time all year.
1450#
1451# Windsor is, of course, a lot larger than Nipigon.
1452#
1453# I only came across this incidentally.  I don't know if Windsor began
1454# observing DST when Detroit did, or in 1974, or on some other date.
1455#
1456# By the way, the article continues by noting that:
1457#
1458#     Some cities in the United States have pushed the deadline back
1459#     three weeks and will change over from daylight saving in October.
1460
1461# From Arthur David Olson (2010-07-17):
1462#
1463# "Standard Time and Time Zones in Canada" appeared in
1464# The Journal of The Royal Astronomical Society of Canada,
1465# volume 26, number 2 (February 1932) and, as of 2010-07-17,
1466# was available at
1467# http://adsabs.harvard.edu/full/1932JRASC..26...49S
1468#
1469# It includes the text below (starting on page 57):
1470#
1471#   A list of the places in Canada using daylight saving time would
1472# require yearly revision. From information kindly furnished by
1473# the provincial governments and by the postmasters in many cities
1474# and towns, it is found that the following places used daylight sav-
1475# ing in 1930. The information for the province of Quebec is definite,
1476# for the other provinces only approximate:
1477#
1478#	Province	Daylight saving time used
1479# Prince Edward Island	Not used.
1480# Nova Scotia		In Halifax only.
1481# New Brunswick		In St. John only.
1482# Quebec		In the following places:
1483#			Montreal	Lachine
1484#			Quebec		Mont-Royal
1485#			Lévis		Iberville
1486#			St. Lambert	Cap de la Madelèine
1487#			Verdun		Loretteville
1488#			Westmount	Richmond
1489#			Outremont	St. Jérôme
1490#			Longueuil	Greenfield Park
1491#			Arvida		Waterloo
1492#			Chambly-Canton	Beaulieu
1493#			Melbourne	La Tuque
1494#			St. Théophile	Buckingham
1495# Ontario		Used generally in the cities and towns along
1496#			the southerly part of the province. Not
1497#			used in the northwesterly part.
1498# Manitoba		Not used.
1499# Saskatchewan		In Regina only.
1500# Alberta		Not used.
1501# British Columbia	Not used.
1502#
1503#   With some exceptions, the use of daylight saving may be said to be limited
1504# to those cities and towns lying between Quebec city and Windsor, Ont.
1505
1506# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1507Rule	Toronto	1919	only	-	Mar	30	23:30	1:00	D
1508Rule	Toronto	1919	only	-	Oct	26	0:00	0	S
1509Rule	Toronto	1920	only	-	May	 2	2:00	1:00	D
1510Rule	Toronto	1920	only	-	Sep	26	0:00	0	S
1511Rule	Toronto	1921	only	-	May	15	2:00	1:00	D
1512Rule	Toronto	1921	only	-	Sep	15	2:00	0	S
1513Rule	Toronto	1922	1923	-	May	Sun>=8	2:00	1:00	D
1514# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
1515# was meant.
1516Rule	Toronto	1922	1926	-	Sep	Sun>=15	2:00	0	S
1517Rule	Toronto	1924	1927	-	May	Sun>=1	2:00	1:00	D
1518# The 1927-to-1939 rules can be expressed more simply as
1519# Rule	Toronto	1927	1937	-	Sep	Sun>=25	2:00	0	S
1520# Rule	Toronto	1928	1937	-	Apr	Sun>=25	2:00	1:00	D
1521# Rule	Toronto	1938	1940	-	Apr	lastSun	2:00	1:00	D
1522# Rule	Toronto	1938	1939	-	Sep	lastSun	2:00	0	S
1523# The rules below avoid use of Sun>=25
1524# (which pre-2004 versions of zic cannot handle).
1525Rule	Toronto	1927	1932	-	Sep	lastSun	2:00	0	S
1526Rule	Toronto	1928	1931	-	Apr	lastSun	2:00	1:00	D
1527Rule	Toronto	1932	only	-	May	1	2:00	1:00	D
1528Rule	Toronto	1933	1940	-	Apr	lastSun	2:00	1:00	D
1529Rule	Toronto	1933	only	-	Oct	1	2:00	0	S
1530Rule	Toronto	1934	1939	-	Sep	lastSun	2:00	0	S
1531Rule	Toronto	1945	1946	-	Sep	lastSun	2:00	0	S
1532Rule	Toronto	1946	only	-	Apr	lastSun	2:00	1:00	D
1533Rule	Toronto	1947	1949	-	Apr	lastSun	0:00	1:00	D
1534Rule	Toronto	1947	1948	-	Sep	lastSun	0:00	0	S
1535Rule	Toronto	1949	only	-	Nov	lastSun	0:00	0	S
1536Rule	Toronto	1950	1973	-	Apr	lastSun	2:00	1:00	D
1537Rule	Toronto	1950	only	-	Nov	lastSun	2:00	0	S
1538Rule	Toronto	1951	1956	-	Sep	lastSun	2:00	0	S
1539# Shanks & Pottenger say Toronto ended DST a week early in 1971,
1540# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this
1541# is wrong, and that he had confirmed it by checking the 1971-10-30
1542# Toronto Star, which said that DST was ending 1971-10-31 as usual.
1543Rule	Toronto	1957	1973	-	Oct	lastSun	2:00	0	S
1544
1545# From Paul Eggert (2003-07-27):
1546# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and
1547# Port Arthur, Ontario, the principle of the Bill has been in
1548# operation for the past three years, and in the City of Moose Jaw,
1549# Saskatchewan, for one year."
1550
1551# From David Bryan via Tory Tronrud, Director/Curator,
1552# Thunder Bay Museum (2003-11-12):
1553# There is some suggestion, however, that, by-law or not, daylight
1554# savings time was being practiced in Fort William and Port Arthur
1555# before 1909.... [I]n 1910, the line between the Eastern and Central
1556# Time Zones was permanently moved about two hundred miles west to
1557# include the Thunder Bay area....  When Canada adopted daylight
1558# savings time in 1916, Fort William and Port Arthur, having done so
1559# already, did not change their clocks....  During the Second World
1560# War,... [t]he cities agreed to implement DST during the summer
1561# months for the remainder of the war years.
1562
1563# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1564Zone America/Toronto	-5:17:32 -	LMT	1895
1565			-5:00	Canada	E%sT	1919
1566			-5:00	Toronto	E%sT	1942 Feb  9  2:00s
1567			-5:00	Canada	E%sT	1946
1568			-5:00	Toronto	E%sT	1974
1569			-5:00	Canada	E%sT
1570Zone America/Thunder_Bay -5:57:00 -	LMT	1895
1571			-6:00	-	CST	1910
1572			-5:00	-	EST	1942
1573			-5:00	Canada	E%sT	1970
1574			-5:00	Toronto	E%sT	1973
1575			-5:00	-	EST	1974
1576			-5:00	Canada	E%sT
1577Zone America/Nipigon	-5:53:04 -	LMT	1895
1578			-5:00	Canada	E%sT	1940 Sep 29
1579			-5:00	1:00	EDT	1942 Feb  9  2:00s
1580			-5:00	Canada	E%sT
1581Zone America/Rainy_River -6:18:16 -	LMT	1895
1582			-6:00	Canada	C%sT	1940 Sep 29
1583			-6:00	1:00	CDT	1942 Feb  9  2:00s
1584			-6:00	Canada	C%sT
1585Zone America/Atikokan	-6:06:28 -	LMT	1895
1586			-6:00	Canada	C%sT	1940 Sep 29
1587			-6:00	1:00	CDT	1942 Feb  9  2:00s
1588			-6:00	Canada	C%sT	1945 Sep 30  2:00
1589			-5:00	-	EST
1590
1591
1592# Manitoba
1593
1594# From Rob Douglas (2006-04-06):
1595# the old Manitoba Time Act - as amended by Bill 2, assented to
1596# March 27, 1987 ... said ...
1597# "between two o'clock Central Standard Time in the morning of
1598# the first Sunday of April of each year and two o'clock Central
1599# Standard Time in the morning of the last Sunday of October next
1600# following, one hour in advance of Central Standard Time."...
1601# I believe that the English legislation [of the old time act] had
1602# been assented to (March 22, 1967)....
1603# Also, as far as I can tell, there was no order-in-council varying
1604# the time of Daylight Saving Time for 2005 and so the provisions of
1605# the 1987 version would apply - the changeover was at 2:00 Central
1606# Standard Time (i.e. not until 3:00 Central Daylight Time).
1607
1608# From Paul Eggert (2006-04-10):
1609# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s)
1610# starting 1966.  Since 02:00s is clearly correct for 1967 on, assume
1611# it was also 02:00s in 1966.
1612
1613# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1614Rule	Winn	1916	only	-	Apr	23	0:00	1:00	D
1615Rule	Winn	1916	only	-	Sep	17	0:00	0	S
1616Rule	Winn	1918	only	-	Apr	14	2:00	1:00	D
1617Rule	Winn	1918	only	-	Oct	27	2:00	0	S
1618Rule	Winn	1937	only	-	May	16	2:00	1:00	D
1619Rule	Winn	1937	only	-	Sep	26	2:00	0	S
1620Rule	Winn	1942	only	-	Feb	 9	2:00	1:00	W # War
1621Rule	Winn	1945	only	-	Aug	14	23:00u	1:00	P # Peace
1622Rule	Winn	1945	only	-	Sep	lastSun	2:00	0	S
1623Rule	Winn	1946	only	-	May	12	2:00	1:00	D
1624Rule	Winn	1946	only	-	Oct	13	2:00	0	S
1625Rule	Winn	1947	1949	-	Apr	lastSun	2:00	1:00	D
1626Rule	Winn	1947	1949	-	Sep	lastSun	2:00	0	S
1627Rule	Winn	1950	only	-	May	 1	2:00	1:00	D
1628Rule	Winn	1950	only	-	Sep	30	2:00	0	S
1629Rule	Winn	1951	1960	-	Apr	lastSun	2:00	1:00	D
1630Rule	Winn	1951	1958	-	Sep	lastSun	2:00	0	S
1631Rule	Winn	1959	only	-	Oct	lastSun	2:00	0	S
1632Rule	Winn	1960	only	-	Sep	lastSun	2:00	0	S
1633Rule	Winn	1963	only	-	Apr	lastSun	2:00	1:00	D
1634Rule	Winn	1963	only	-	Sep	22	2:00	0	S
1635Rule	Winn	1966	1986	-	Apr	lastSun	2:00s	1:00	D
1636Rule	Winn	1966	2005	-	Oct	lastSun	2:00s	0	S
1637Rule	Winn	1987	2005	-	Apr	Sun>=1	2:00s	1:00	D
1638# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1639Zone America/Winnipeg	-6:28:36 -	LMT	1887 Jul 16
1640			-6:00	Winn	C%sT	2006
1641			-6:00	Canada	C%sT
1642
1643
1644# Saskatchewan
1645
1646# From Mark Brader (2003-07-26):
1647# The first actual adoption of DST in Canada was at the municipal
1648# level.  As the [Toronto] Star put it (1912-06-07), "While people
1649# elsewhere have long been talking of legislation to save daylight,
1650# the city of Moose Jaw [Saskatchewan] has acted on its own hook."
1651# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
1652# presumably late evening, as below), and would run until "the end of
1653# the summer".  The discrepancy between municipal time and railroad
1654# time was noted.
1655
1656# From Paul Eggert (2003-07-27):
1657# Willett (1914-03) notes that DST "has been in operation ... in the
1658# City of Moose Jaw, Saskatchewan, for one year."
1659
1660# From Paul Eggert (2006-03-22):
1661# Shanks & Pottenger say that since 1970 this region has mostly been as Regina.
1662# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
1663# Other western towns (e.g. Lloydminster) are like Edmonton.
1664# Matthews and Vincent (1998) write that Denare Beach and Creighton
1665# are like Winnipeg, in violation of Saskatchewan law.
1666
1667# From W. Jones (1992-11-06):
1668# The. . .below is based on information I got from our law library, the
1669# provincial archives, and the provincial Community Services department.
1670# A precise history would require digging through newspaper archives, and
1671# since you didn't say what you wanted, I didn't bother.
1672#
1673# Saskatchewan is split by a time zone meridian (105W) and over the years
1674# the boundary became pretty ragged as communities near it reevaluated
1675# their affiliations in one direction or the other.  In 1965 a provincial
1676# referendum favoured legislating common time practices.
1677#
1678# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
1679# Saskatchewan 1978) was proclaimed, and established that the eastern
1680# part of Saskatchewan would use CST year round, that districts in
1681# northwest Saskatchewan would by default follow CST but could opt to
1682# follow Mountain Time rules (thus 1 hour difference in the winter and
1683# zero in the summer), and that districts in southwest Saskatchewan would
1684# by default follow MT but could opt to follow CST.
1685#
1686# It took a few years for the dust to settle (I know one story of a town
1687# on one time zone having its school in another, such that a mom had to
1688# serve her family lunch in two shifts), but presently it seems that only
1689# a few towns on the border with Alberta (e.g. Lloydminster) follow MT
1690# rules any more; all other districts appear to have used CST year round
1691# since sometime in the 1960s.
1692
1693# From Chris Walton (2006-06-26):
1694# The Saskatchewan time act which was last updated in 1996 is about 30 pages
1695# long and rather painful to read.
1696# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf
1697
1698# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1699Rule	Regina	1918	only	-	Apr	14	2:00	1:00	D
1700Rule	Regina	1918	only	-	Oct	27	2:00	0	S
1701Rule	Regina	1930	1934	-	May	Sun>=1	0:00	1:00	D
1702Rule	Regina	1930	1934	-	Oct	Sun>=1	0:00	0	S
1703Rule	Regina	1937	1941	-	Apr	Sun>=8	0:00	1:00	D
1704Rule	Regina	1937	only	-	Oct	Sun>=8	0:00	0	S
1705Rule	Regina	1938	only	-	Oct	Sun>=1	0:00	0	S
1706Rule	Regina	1939	1941	-	Oct	Sun>=8	0:00	0	S
1707Rule	Regina	1942	only	-	Feb	 9	2:00	1:00	W # War
1708Rule	Regina	1945	only	-	Aug	14	23:00u	1:00	P # Peace
1709Rule	Regina	1945	only	-	Sep	lastSun	2:00	0	S
1710Rule	Regina	1946	only	-	Apr	Sun>=8	2:00	1:00	D
1711Rule	Regina	1946	only	-	Oct	Sun>=8	2:00	0	S
1712Rule	Regina	1947	1957	-	Apr	lastSun	2:00	1:00	D
1713Rule	Regina	1947	1957	-	Sep	lastSun	2:00	0	S
1714Rule	Regina	1959	only	-	Apr	lastSun	2:00	1:00	D
1715Rule	Regina	1959	only	-	Oct	lastSun	2:00	0	S
1716#
1717Rule	Swift	1957	only	-	Apr	lastSun	2:00	1:00	D
1718Rule	Swift	1957	only	-	Oct	lastSun	2:00	0	S
1719Rule	Swift	1959	1961	-	Apr	lastSun	2:00	1:00	D
1720Rule	Swift	1959	only	-	Oct	lastSun	2:00	0	S
1721Rule	Swift	1960	1961	-	Sep	lastSun	2:00	0	S
1722# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1723Zone America/Regina	-6:58:36 -	LMT	1905 Sep
1724			-7:00	Regina	M%sT	1960 Apr lastSun  2:00
1725			-6:00	-	CST
1726Zone America/Swift_Current -7:11:20 -	LMT	1905 Sep
1727			-7:00	Canada	M%sT	1946 Apr lastSun  2:00
1728			-7:00	Regina	M%sT	1950
1729			-7:00	Swift	M%sT	1972 Apr lastSun  2:00
1730			-6:00	-	CST
1731
1732
1733# Alberta
1734
1735# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1736Rule	Edm	1918	1919	-	Apr	Sun>=8	2:00	1:00	D
1737Rule	Edm	1918	only	-	Oct	27	2:00	0	S
1738Rule	Edm	1919	only	-	May	27	2:00	0	S
1739Rule	Edm	1920	1923	-	Apr	lastSun	2:00	1:00	D
1740Rule	Edm	1920	only	-	Oct	lastSun	2:00	0	S
1741Rule	Edm	1921	1923	-	Sep	lastSun	2:00	0	S
1742Rule	Edm	1942	only	-	Feb	 9	2:00	1:00	W # War
1743Rule	Edm	1945	only	-	Aug	14	23:00u	1:00	P # Peace
1744Rule	Edm	1945	only	-	Sep	lastSun	2:00	0	S
1745Rule	Edm	1947	only	-	Apr	lastSun	2:00	1:00	D
1746Rule	Edm	1947	only	-	Sep	lastSun	2:00	0	S
1747Rule	Edm	1967	only	-	Apr	lastSun	2:00	1:00	D
1748Rule	Edm	1967	only	-	Oct	lastSun	2:00	0	S
1749Rule	Edm	1969	only	-	Apr	lastSun	2:00	1:00	D
1750Rule	Edm	1969	only	-	Oct	lastSun	2:00	0	S
1751Rule	Edm	1972	1986	-	Apr	lastSun	2:00	1:00	D
1752Rule	Edm	1972	2006	-	Oct	lastSun	2:00	0	S
1753# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1754Zone America/Edmonton	-7:33:52 -	LMT	1906 Sep
1755			-7:00	Edm	M%sT	1987
1756			-7:00	Canada	M%sT
1757
1758
1759# British Columbia
1760
1761# From Paul Eggert (2006-03-22):
1762# Shanks & Pottenger write that since 1970 most of this region has
1763# been like Vancouver.
1764# Dawson Creek uses MST.  Much of east BC is like Edmonton.
1765# Matthews and Vincent (1998) write that Creston is like Dawson Creek.
1766
1767# It seems though that (re: Creston) is not entirely correct:
1768
1769# From Chris Walton (2011-12-01):
1770# There are two areas within the Canadian province of British Columbia
1771# that do not currently observe daylight saving:
1772# a) The Creston Valley (includes the town of Creston and surrounding area)
1773# b) The eastern half of the Peace River Regional District
1774# (includes the cities of Dawson Creek and Fort St. John)
1775
1776# Earlier this year I stumbled across a detailed article about the time
1777# keeping history of Creston; it was written by Tammy Hardwick who is the
1778# manager of the Creston & District Museum. The article was written in May 2009.
1779# http://www.ilovecreston.com/?p=articles&t=spec&ar=260
1780# According to the article, Creston has not changed its clocks since June 1918.
1781# i.e. Creston has been stuck on UTC-7 for 93 years.
1782# Dawson Creek, on the other hand, changed its clocks as recently as April 1972.
1783
1784# Unfortunately the exact date for the time change in June 1918 remains
1785# unknown and will be difficult to ascertain.  I e-mailed Tammy a few months
1786# ago to ask if Sunday June 2 was a reasonable guess.  She said it was just
1787# as plausible as any other date (in June).  She also said that after writing
1788# the article she had discovered another time change in 1916; this is the
1789# subject of another article which she wrote in October 2010.
1790# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56
1791
1792# Here is a summary of the three clock change events in Creston's history:
1793# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7)
1794# Exact date unknown
1795# 2. Oct 1916: switch to Pacific Standard Time (GMT-8)
1796# Exact date in October unknown; Sunday October 1 is a reasonable guess.
1797# 3. June 1918: switch to Pacific Daylight Time (GMT-7)
1798# Exact date in June unknown; Sunday June 2 is a reasonable guess.
1799# note#1:
1800# On Oct 27/1918 when daylight saving ended in the rest of Canada,
1801# Creston did not change its clocks.
1802# note#2:
1803# During WWII when the Federal Government legislated a mandatory clock change,
1804# Creston did not oblige.
1805# note#3:
1806# There is no guarantee that Creston will remain on Mountain Standard Time
1807# (UTC-7) forever.
1808# The subject was debated at least once this year by the town Council.
1809# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html
1810
1811# During a period WWII, summer time (Daylight saying) was mandatory in Canada.
1812# In Creston, that was handled by shifting the area to PST (-8:00) then applying
1813# summer time to cause the offset to be -7:00, the same as it had been before
1814# the change.  It can be argued that the timezone abbreviation during this
1815# period should be PDT rather than MST, but that doesn't seem important enough
1816# (to anyone) to further complicate the rules.
1817
1818# The transition dates (and times) are guesses.
1819
1820# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1821Rule	Vanc	1918	only	-	Apr	14	2:00	1:00	D
1822Rule	Vanc	1918	only	-	Oct	27	2:00	0	S
1823Rule	Vanc	1942	only	-	Feb	 9	2:00	1:00	W # War
1824Rule	Vanc	1945	only	-	Aug	14	23:00u	1:00	P # Peace
1825Rule	Vanc	1945	only	-	Sep	30	2:00	0	S
1826Rule	Vanc	1946	1986	-	Apr	lastSun	2:00	1:00	D
1827Rule	Vanc	1946	only	-	Oct	13	2:00	0	S
1828Rule	Vanc	1947	1961	-	Sep	lastSun	2:00	0	S
1829Rule	Vanc	1962	2006	-	Oct	lastSun	2:00	0	S
1830# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1831Zone America/Vancouver	-8:12:28 -	LMT	1884
1832			-8:00	Vanc	P%sT	1987
1833			-8:00	Canada	P%sT
1834Zone America/Dawson_Creek -8:00:56 -	LMT	1884
1835			-8:00	Canada	P%sT	1947
1836			-8:00	Vanc	P%sT	1972 Aug 30  2:00
1837			-7:00	-	MST
1838Zone America/Creston	-7:46:04 -	LMT	1884
1839			-7:00	-	MST	1916 Oct 1
1840			-8:00	-	PST	1918 Jun 2
1841			-7:00	-	MST
1842
1843# Northwest Territories, Nunavut, Yukon
1844
1845# From Paul Eggert (2006-03-22):
1846# Dawson switched to PST in 1973.  Inuvik switched to MST in 1979.
1847# Mathew Englander (1996-10-07) gives the following refs:
1848#	* 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
1849#	c. 7 defines Yukon standard time as UTC-9....
1850#	see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
1851#	[http://canlii.ca/t/7vhg]
1852#	* C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
1853#	* O.I.C. 1980/02 established DST.
1854#	* O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
1855
1856# From Brian Inglis (2015-04-14):
1857#
1858# I tried to trace the history of Yukon time and found the following
1859# regulations, giving the reference title and URL if found, regulation name,
1860# and relevant quote if available.  Each regulation specifically revokes its
1861# predecessor.  The final reference is to the current Interpretation Act
1862# authorizing and resulting from these regulatory changes.
1863#
1864# Only recent regulations were retrievable via Yukon government site search or
1865# index, and only some via Canadian legal sources.  Other sources used include
1866# articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS
1867# Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and
1868# 1970 quoted below; each article includes current extracts from provincial
1869# and territorial ST and DST regulations at the end, summaries and details of
1870# standard times and daylight saving time at many locations across Canada,
1871# with time zone maps, tables and calculations for Canadian Sunrise, Sunset,
1872# and LMST; they also cover many countries and global locations, with a chart
1873# and table showing current Universal Time offsets, and may be useful as
1874# another source of information for 1970 and earlier.
1875#
1876# * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26,
1877#   pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS)
1878#   http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75:
1879#   Yukon Interpretation Ordinance
1880#   Yukon standard time is the local mean time at the one hundred and
1881#   thirty-fifth meridian.
1882#
1883# * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.;
1884#   JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System
1885#   (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1:
1886#   Yukon Interpretation Ordinance, 1955, Chap. 16.
1887#
1888#     (1) Subject to this section, standard time shall be reckoned as nine
1889#     hours behind Greenwich Time and called Yukon Standard Time.
1890#
1891#     (2) Notwithstanding subsection (1), the Commissioner may make regulations
1892#     varying the manner of reckoning standard time.
1893#
1894# * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance
1895#   http://? - no online source found
1896#
1897# * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC,
1898#   Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS)
1899#   http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon
1900#   Territory Commissioner's Order 1967-59 Interpretation Ordinance ...
1901#
1902#     1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon
1903#     Territory on 27th January, 1966, is hereby revoked.
1904#
1905#     2. Yukon (East) Standard Time as defined by section 36 of the
1906#     Interpretation Ordinance from and after mid-night on the 28th day of May,
1907#     1967 shall be reckoned in the same manner as Pacific Standard Time, that
1908#     is to say, eight hours behind Greenwich Time in the area of the Yukon
1909#     Territory lying east of the 138th degree longitude west.
1910#
1911#     3. In the remainder of the Territory, lying west of the 138th degree
1912#     longitude west, Yukon (West) Standard Time shall be reckoned as nine
1913#     hours behind Greenwich Time.
1914#
1915# * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214
1916#   http://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html
1917#   C.O. 1973/214 INTERPRETATION ACT ...
1918#
1919#     1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby
1920#     revoked.
1921#
1922#     2. Yukon Standard Time as defined by section 36 of the Interpretation
1923#     Act from and after midnight on the twenty-eighth day of October, 1973
1924#     shall be reckoned in the same manner as Pacific Standard Time, that is
1925#     to say eight hours behind Greenwich Time.
1926#
1927# * O.I.C. 1980/02 INTERPRETATION ACT
1928#   http://? - no online source found
1929#
1930# * Yukon Daylight Saving Time, YOIC 1987/56
1931#   http://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html
1932#   O.I.C. 1987/056 INTERPRETATION ACT ...
1933#
1934#   In every year between
1935#     (a) two o'clock in the morning in the first Sunday in April, and
1936#     (b) two o'clock in the morning in the last Sunday in October,
1937#   Standard Time shall be reckoned as seven hours behind Greenwich Time and
1938#   called Yukon Daylight Saving Time.
1939#   ...
1940#   Dated ... 9th day of March, A.D., 1987.
1941#
1942# * Yukon Daylight Saving Time 2006, YOIC 2006/127
1943#   http://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html
1944#   O.I.C. 2006/127 INTERPRETATION ACT ...
1945#
1946#     1. In Yukon each year the time for general purposes shall be 7 hours
1947#     behind Greenwich mean time during the period commencing at two o'clock
1948#     in the forenoon on the second Sunday of March and ending at two o'clock
1949#     in the forenoon on the first Sunday of November and shall be called
1950#     Yukon Daylight Saving Time.
1951#
1952#     2. Order-in-Council 1987/56 is revoked.
1953#
1954#     3. This order comes into force January 1, 2007.
1955#
1956# * Interpretation Act, RSY 2002, c 125
1957# http://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html
1958
1959# From Rives McDow (1999-09-04):
1960# Nunavut ... moved ... to incorporate the whole territory into one time zone.
1961# Nunavut moves to single time zone Oct. 31
1962# http://www.nunatsiaq.com/nunavut/nvt90903_13.html
1963#
1964# From Antoine Leca (1999-09-06):
1965# We then need to create a new timezone for the Kitikmeot region of Nunavut
1966# to differentiate it from the Yellowknife region.
1967
1968# From Paul Eggert (1999-09-20):
1969# Basic Facts: The New Territory
1970# http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html
1971# (1999) reports that Pangnirtung operates on eastern time,
1972# and that Coral Harbour does not observe DST.  We don't know when
1973# Pangnirtung switched to eastern time; we'll guess 1995.
1974
1975# From Rives McDow (1999-11-08):
1976# On October 31, when the rest of Nunavut went to Central time,
1977# Pangnirtung wobbled.  Here is the result of their wobble:
1978#
1979# The following businesses and organizations in Pangnirtung use Central Time:
1980#
1981#	First Air, Power Corp, Nunavut Construction, Health Center, RCMP,
1982#	Eastern Arctic National Parks, A & D Specialist
1983#
1984# The following businesses and organizations in Pangnirtung use Eastern Time:
1985#
1986#	Hamlet office, All other businesses, Both schools, Airport operator
1987#
1988# This has made for an interesting situation there, which warranted the news.
1989# No one there that I spoke with seems concerned, or has plans to
1990# change the local methods of keeping time, as it evidently does not
1991# really interfere with any activities or make things difficult locally.
1992# They plan to celebrate New Year's turn-over twice, one hour apart,
1993# so it appears that the situation will last at least that long.
1994# The Nunavut Intergovernmental Affairs hopes that they will "come to
1995# their senses", but the locals evidently don't see any problem with
1996# the current state of affairs.
1997
1998# From Michaela Rodrigue, writing in the
1999# Nunatsiaq News (1999-11-19):
2000# http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html
2001# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones,
2002# central - or Nunavut time - for government offices, and eastern time
2003# for municipal offices and schools....  Igloolik [was similar but then]
2004# made the switch to central time on Saturday, Nov. 6.
2005
2006# From Paul Eggert (2000-10-02):
2007# Matthews and Vincent (1998) say the following, but we lack histories
2008# for these potential new Zones.
2009#
2010# The Canadian Forces station at Alert uses Eastern Time while the
2011# handful of residents at the Eureka weather station [in the Central
2012# zone] skip daylight savings.  Baffin Island, which is crossed by the
2013# Central, Eastern and Atlantic Time zones only uses Eastern Time.
2014# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of
2015# Central Time and Southampton Island [in the Central zone] is not
2016# required to use daylight savings.
2017
2018# From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html>
2019# Nunavut now has two time zones (2000-11-10):
2020# The Nunavut government would allow its employees in Kugluktuk and
2021# Cambridge Bay to operate on central time year-round, putting them
2022# one hour behind the rest of Nunavut for six months during the winter.
2023# At the end of October the two communities had rebelled against
2024# Nunavut's unified time zone, refusing to shift to eastern time with
2025# the rest of the territory for the winter.  Cambridge Bay remained on
2026# central time, while Kugluktuk, even farther west, reverted to
2027# mountain time, which they had used before the advent of Nunavut's
2028# unified time zone in 1999.
2029#
2030# From Rives McDow (2001-01-20), quoting the Nunavut government:
2031# The preceding decision came into effect at midnight, Saturday Nov 4, 2000.
2032
2033# From Paul Eggert (2000-12-04):
2034# Let's just keep track of the official times for now.
2035
2036# From Rives McDow (2001-03-07):
2037# The premier of Nunavut has issued a ministerial statement advising
2038# that effective 2001-04-01, the territory of Nunavut will revert
2039# back to three time zones (mountain, central, and eastern).  Of the
2040# cities in Nunavut, Coral Harbor is the only one that I know of that
2041# has said it will not observe dst, staying on EST year round.  I'm
2042# checking for more info, and will get back to you if I come up with
2043# more.
2044# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]
2045
2046# From Gwillim Law (2005-05-21):
2047# According to ...
2048# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp
2049# (from a 1998 Canadian Geographic article), the de facto and de jure time
2050# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year
2051# round.  Using Google, it's easy to find other websites that confirm this.
2052# I wasn't able to find how far back this time regimen goes, but since it
2053# predates the creation of Nunavut, it probably goes back many years....
2054# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used.
2055#
2056# From Paul Eggert (2014-10-17):
2057# For lack of better information, assume that Southampton Island observed
2058# daylight saving only during wartime.  Gwillim Law's email also
2059# mentioned maps now maintained by National Research Council Canada;
2060# see above for an up-to-date link.
2061
2062# From Chris Walton (2007-03-01):
2063# ... the community of Resolute (located on Cornwallis Island in
2064# Nunavut) moved from Central Time to Eastern Time last November.
2065# Basically the community did not change its clocks at the end of
2066# daylight saving....
2067# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html
2068
2069# From Chris Walton (2011-03-21):
2070# Back in 2007 I initiated the creation of a new "zone file" for Resolute
2071# Bay. Resolute Bay is a small community located about 900km north of
2072# the Arctic Circle. The zone file was required because Resolute Bay had
2073# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007.
2074#
2075# According to new information which I received last week, Resolute Bay
2076# went back to using UTC-6 in the winter of 2007-2008...
2077#
2078# On March 11/2007 most of Canada went onto daylight saving. On March
2079# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I
2080# talked to somebody that was both knowledgeable and helpful. I was able
2081# to confirm that Resolute Bay was still operating on UTC-5. It was
2082# explained to me that Resolute Bay had been on the Eastern Time zone
2083# (EST) in the winter, and was now back on the Central Time zone (CDT).
2084# i.e. the time zone had changed twice in the last year but the clocks
2085# had not moved. The residents had to know which time zone they were in
2086# so they could follow the correct TV schedule...
2087#
2088# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I
2089# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature
2090# of the phone call, I decided to seek out an alternate source of
2091# information. I found an e-mail address for somebody by the name of
2092# Stephanie Adams whose job was listed as "Inns North Support Officer for
2093# Arctic Co-operatives." I was under the impression that Stephanie lived
2094# and worked in Resolute Bay...
2095#
2096# On March 14/2011 I phoned the hamlet office again. I was told that
2097# Resolute Bay had been using Central Standard Time over the winter of
2098# 2010-2011 and that the clocks had therefore been moved one hour ahead
2099# on March 13/2011. The person I talked to was aware that Resolute Bay
2100# had previously experimented with Eastern Standard Time but he could not
2101# tell me when the practice had stopped.
2102#
2103# On March 17/2011 I searched the Web to find an e-mail address of
2104# somebody that might be able to tell me exactly when Resolute Bay went
2105# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz
2106# used to be the mayor of Resolute Bay and he apparently owns half the
2107# businesses including "South Camp Inn." This website has some info on
2108# Aziz:
2109# http://www.uphere.ca/node/493
2110#
2111# I sent Aziz an e-mail asking when Resolute Bay had stopped using
2112# Eastern Standard Time.
2113#
2114# Aziz responded quickly with this: "hi, The time was not changed for the
2115# 1 year only, the following year, the community went back to the old way
2116# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in
2117# the winter Zulu plus 6 hrs"
2118#
2119# This of course conflicted with everything I had ascertained in November 2008.
2120#
2121# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz
2122# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You
2123# may want to check with the weather office in Resolute Bay or do a
2124# search on the weather through Env. Canada. web site"
2125#
2126# If I had realized the Stephanie did not live in Resolute Bay I would
2127# never have contacted her.  I now believe that all the information I
2128# obtained in November 2008 should be ignored...
2129# I apologize for reporting incorrect information in 2008.
2130
2131# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2132Rule	NT_YK	1918	only	-	Apr	14	2:00	1:00	D
2133Rule	NT_YK	1918	only	-	Oct	27	2:00	0	S
2134Rule	NT_YK	1919	only	-	May	25	2:00	1:00	D
2135Rule	NT_YK	1919	only	-	Nov	 1	0:00	0	S
2136Rule	NT_YK	1942	only	-	Feb	 9	2:00	1:00	W # War
2137Rule	NT_YK	1945	only	-	Aug	14	23:00u	1:00	P # Peace
2138Rule	NT_YK	1945	only	-	Sep	30	2:00	0	S
2139Rule	NT_YK	1965	only	-	Apr	lastSun	0:00	2:00	DD
2140Rule	NT_YK	1965	only	-	Oct	lastSun	2:00	0	S
2141Rule	NT_YK	1980	1986	-	Apr	lastSun	2:00	1:00	D
2142Rule	NT_YK	1980	2006	-	Oct	lastSun	2:00	0	S
2143Rule	NT_YK	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
2144# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2145# aka Panniqtuuq
2146Zone America/Pangnirtung 0	-	zzz	1921 # trading post est.
2147			-4:00	NT_YK	A%sT	1995 Apr Sun>=1  2:00
2148			-5:00	Canada	E%sT	1999 Oct 31  2:00
2149			-6:00	Canada	C%sT	2000 Oct 29  2:00
2150			-5:00	Canada	E%sT
2151# formerly Frobisher Bay
2152Zone America/Iqaluit	0	-	zzz	1942 Aug # Frobisher Bay est.
2153			-5:00	NT_YK	E%sT	1999 Oct 31  2:00
2154			-6:00	Canada	C%sT	2000 Oct 29  2:00
2155			-5:00	Canada	E%sT
2156# aka Qausuittuq
2157Zone America/Resolute	0	-	zzz	1947 Aug 31 # Resolute founded
2158			-6:00	NT_YK	C%sT	2000 Oct 29  2:00
2159			-5:00	-	EST	2001 Apr  1  3:00
2160			-6:00	Canada	C%sT	2006 Oct 29  2:00
2161			-5:00	-	EST	2007 Mar 11  3:00
2162			-6:00	Canada	C%sT
2163# aka Kangiqiniq
2164Zone America/Rankin_Inlet 0	-	zzz	1957 # Rankin Inlet founded
2165			-6:00	NT_YK	C%sT	2000 Oct 29  2:00
2166			-5:00	-	EST	2001 Apr  1  3:00
2167			-6:00	Canada	C%sT
2168# aka Iqaluktuuttiaq
2169Zone America/Cambridge_Bay 0	-	zzz	1920 # trading post est.?
2170			-7:00	NT_YK	M%sT	1999 Oct 31  2:00
2171			-6:00	Canada	C%sT	2000 Oct 29  2:00
2172			-5:00	-	EST	2000 Nov  5  0:00
2173			-6:00	-	CST	2001 Apr  1  3:00
2174			-7:00	Canada	M%sT
2175Zone America/Yellowknife 0	-	zzz	1935 # Yellowknife founded?
2176			-7:00	NT_YK	M%sT	1980
2177			-7:00	Canada	M%sT
2178Zone America/Inuvik	0	-	zzz	1953 # Inuvik founded
2179			-8:00	NT_YK	P%sT	1979 Apr lastSun  2:00
2180			-7:00	NT_YK	M%sT	1980
2181			-7:00	Canada	M%sT
2182Zone America/Whitehorse	-9:00:12 -	LMT	1900 Aug 20
2183			-9:00	NT_YK	Y%sT	1967 May 28  0:00
2184			-8:00	NT_YK	P%sT	1980
2185			-8:00	Canada	P%sT
2186Zone America/Dawson	-9:17:40 -	LMT	1900 Aug 20
2187			-9:00	NT_YK	Y%sT	1973 Oct 28  0:00
2188			-8:00	NT_YK	P%sT	1980
2189			-8:00	Canada	P%sT
2190
2191
2192###############################################################################
2193
2194# Mexico
2195
2196# From Paul Eggert (2014-12-07):
2197# The Investigation and Analysis Service of the
2198# Mexican Library of Congress (MLoC) has published a
2199# history of Mexican local time (in Spanish)
2200# http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm
2201#
2202# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC.
2203# (In all cases we go with the MLoC.)
2204# S&P report that Baja was at -8:00 in 1922/1923.
2205# S&P say the 1930 transition in Baja was 1930-11-16.
2206# S&P report no DST during summer 1931.
2207# S&P report a transition at 1932-03-30 23:00, not 1932-04-01.
2208
2209# From Gwillim Law (2001-02-20):
2210# There are some other discrepancies between the Decrees page and the
2211# tz database.  I think they can best be explained by supposing that
2212# the researchers who prepared the Decrees page failed to find some of
2213# the relevant documents.
2214
2215# From Alan Perry (1996-02-15):
2216# A guy from our Mexico subsidiary finally found the Presidential Decree
2217# outlining the timezone changes in Mexico.
2218#
2219# ------------- Begin Forwarded Message -------------
2220#
2221# I finally got my hands on the Official Presidential Decree that sets up the
2222# rules for the DST changes. The rules are:
2223#
2224# 1. The country is divided in 3 timezones:
2225#    - Baja California Norte (the Mexico/BajaNorte TZ)
2226#    - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)
2227#    - The rest of the country (the Mexico/General TZ)
2228#
2229# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October
2230#    at 2:00 AM, the times in each zone are as follows:
2231#    BajaNorte: GMT+7
2232#    BajaSur:   GMT+6
2233#    General:   GMT+5
2234#
2235# 3. The rest of the year, the times are as follows:
2236#    BajaNorte: GMT+8
2237#    BajaSur:   GMT+7
2238#    General:   GMT+6
2239#
2240# The Decree was published in Mexico's Official Newspaper on January 4th.
2241#
2242# -------------- End Forwarded Message --------------
2243# From Paul Eggert (1996-06-12):
2244# For an English translation of the decree, see
2245# "Diario Oficial: Time Zone Changeover" (1996-01-04).
2246# http://mexico-travel.com/extra/timezone_eng.html
2247
2248# From Rives McDow (1998-10-08):
2249# The State of Quintana Roo has reverted back to central STD and DST times
2250# (i.e. UTC -0600 and -0500 as of 1998-08-02).
2251
2252# From Rives McDow (2000-01-10):
2253# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time
2254# zone 5 hours from the International Date Line, and will not observe daylight
2255# savings time so as to stay on the same time zone as the southern part of
2256# Arizona year round.
2257
2258# From Jesper Nørgaard, translating
2259# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):
2260# In Oaxaca, the 55.000 teachers from the Section 22 of the National
2261# Syndicate of Education Workers, refuse to apply daylight saving each
2262# year, so that the more than 10,000 schools work at normal hour the
2263# whole year.
2264
2265# From Gwillim Law (2001-01-19):
2266# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says
2267# (translated):...
2268# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced
2269# that Summer Time will be reduced from seven to five months, starting
2270# this year....
2271# http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001
2272# [translated], says "summer time will ... take effect on the first Sunday
2273# in May, and end on the last Sunday of September.
2274
2275# From Arthur David Olson (2001-01-25):
2276# The 2001-01-24 traditional Washington Post contained the page one
2277# story "Timely Issue Divides Mexicans."...
2278# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
2279# ... Mexico City Mayor López Obrador "...is threatening to keep
2280# Mexico City and its 20 million residents on a different time than
2281# the rest of the country..." In particular, López Obrador would abolish
2282# observation of Daylight Saving Time.
2283
2284# Official statute published by the Energy Department
2285# http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre
2286# (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
2287# and Sonora with no DST.  This was reported by Jesper Nørgaard (2001-02-03).
2288
2289# From Paul Eggert (2001-03-03):
2290#
2291# http://www.latimes.com/news/nation/20010303/t000018766.html
2292# James F. Smith writes in today's LA Times
2293# * Sonora will continue to observe standard time.
2294# * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that
2295#   the Federal District will not adopt DST.
2296# * 4 of 16 district leaders announced they'll ignore the decree.
2297# * The decree does not affect federal-controlled facilities including
2298#   the airport, banks, hospitals, and schools.
2299#
2300# For now we'll assume that the Federal District will bow to federal rules.
2301
2302# From Jesper Nørgaard (2001-04-01):
2303# I found some references to the Mexican application of daylight
2304# saving, which modifies what I had already sent you, stating earlier
2305# that a number of northern Mexican states would go on daylight
2306# saving. The modification reverts this to only cover Baja California
2307# (Norte), while all other states (except Sonora, who has no daylight
2308# saving all year) will follow the original decree of president
2309# Vicente Fox, starting daylight saving May 6, 2001 and ending
2310# September 30, 2001.
2311# References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp>
2312# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)
2313
2314# From Reuters (2001-09-04):
2315# Mexico's Supreme Court on Tuesday declared that daylight savings was
2316# unconstitutional in Mexico City, creating the possibility the
2317# capital will be in a different time zone from the rest of the nation
2318# next year....  The Supreme Court's ruling takes effect at 2:00
2319# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to
2320# standard time. "This is so residents of the Federal District are not
2321# subject to unexpected time changes," a statement from the court said.
2322
2323# From Jesper Nørgaard Welen (2002-03-12):
2324# ... consulting my local grocery store(!) and my coworkers, they all insisted
2325# that a new decision had been made to reinstate US style DST in Mexico....
2326# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20)
2327# confirms this.  Sonora as usual is the only state where DST is not applied.
2328
2329# From Steffen Thorsen (2009-12-28):
2330#
2331# Steffen Thorsen wrote:
2332# > Mexico's House of Representatives has approved a proposal for northern
2333# > Mexico's border cities to share the same daylight saving schedule as
2334# > the United States.
2335# Now this has passed both the Congress and the Senate, so starting from
2336# 2010, some border regions will be the same:
2337# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/
2338# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939
2339# (Spanish)
2340#
2341# Could not find the new law text, but the proposed law text changes are here:
2342# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf
2343# (Gaceta Parlamentaria)
2344#
2345# There is also a list of the votes here:
2346# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html
2347#
2348# Our page:
2349# http://www.timeanddate.com/news/time/north-mexico-dst-change.html
2350
2351# From Arthur David Olson (2010-01-20):
2352# The page
2353# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
2354# includes this text:
2355# En los municipios fronterizos de Tijuana y Mexicali en Baja California;
2356# Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila;
2357# Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en
2358# Tamaulipas, la aplicación de este horario estacional surtirá efecto
2359# desde las dos horas del segundo domingo de marzo y concluirá a las dos
2360# horas del primer domingo de noviembre.
2361# En los municipios fronterizos que se encuentren ubicados en la franja
2362# fronteriza norte en el territorio comprendido entre la línea
2363# internacional y la línea paralela ubicada a una distancia de veinte
2364# kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el
2365# interior del país, la aplicación de este horario estacional surtirá
2366# efecto desde las dos horas del segundo domingo de marzo y concluirá a
2367# las dos horas del primer domingo de noviembre.
2368
2369# From Steffen Thorsen (2014-12-08), translated by Gwillim Law:
2370# The Mexican state of Quintana Roo will likely change to EST in 2015.
2371#
2372# http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo
2373# "With this change, the time conflict that has existed between the municipios
2374# of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an
2375# end. The latter declared itself in rebellion 15 years ago when a time change
2376# was initiated in Mexico, and since then it has refused to change its time
2377# zone along with the rest of the country."
2378#
2379# From Steffen Thorsen (2015-01-14), translated by Gwillim Law:
2380# http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html
2381# "...the new time zone will come into effect at two o'clock on the first Sunday
2382# of February, when we will have to advance the clock one hour from its current
2383# time..."
2384# Also, the new zone will not use DST.
2385#
2386# From Carlos Raúl Perasso (2015-02-02):
2387# The decree that modifies the Mexican Hour System Law has finally
2388# been published at the Diario Oficial de la Federación
2389# http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015
2390# It establishes 5 zones for Mexico:
2391# 1- Zona Centro (Central Zone): Corresponds to longitude 90 W,
2392#    includes most of Mexico, excluding what's mentioned below.
2393# 2- Zona Pacífico (Pacific Zone): Longitude 105 W, includes the
2394#    states of Baja California Sur; Chihuahua; Nayarit (excluding Bahía
2395#    de Banderas which lies in Central Zone); Sinaloa and Sonora.
2396# 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the
2397#    state of Baja California.
2398# 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state
2399#    of Quintana Roo.
2400# 5- The islands, reefs and keys shall take their timezone from the
2401#    longitude they are located at.
2402
2403# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2404Rule	Mexico	1939	only	-	Feb	5	0:00	1:00	D
2405Rule	Mexico	1939	only	-	Jun	25	0:00	0	S
2406Rule	Mexico	1940	only	-	Dec	9	0:00	1:00	D
2407Rule	Mexico	1941	only	-	Apr	1	0:00	0	S
2408Rule	Mexico	1943	only	-	Dec	16	0:00	1:00	W # War
2409Rule	Mexico	1944	only	-	May	1	0:00	0	S
2410Rule	Mexico	1950	only	-	Feb	12	0:00	1:00	D
2411Rule	Mexico	1950	only	-	Jul	30	0:00	0	S
2412Rule	Mexico	1996	2000	-	Apr	Sun>=1	2:00	1:00	D
2413Rule	Mexico	1996	2000	-	Oct	lastSun	2:00	0	S
2414Rule	Mexico	2001	only	-	May	Sun>=1	2:00	1:00	D
2415Rule	Mexico	2001	only	-	Sep	lastSun	2:00	0	S
2416Rule	Mexico	2002	max	-	Apr	Sun>=1	2:00	1:00	D
2417Rule	Mexico	2002	max	-	Oct	lastSun	2:00	0	S
2418# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2419# Quintana Roo; represented by Cancún
2420Zone America/Cancun	-5:47:04 -	LMT	1922 Jan  1  0:12:56
2421			-6:00	-	CST	1981 Dec 23
2422			-5:00	Mexico	E%sT	1998 Aug  2  2:00
2423			-6:00	Mexico	C%sT	2015 Feb  1  2:00
2424			-5:00	-	EST
2425# Campeche, Yucatán; represented by Mérida
2426Zone America/Merida	-5:58:28 -	LMT	1922 Jan  1  0:01:32
2427			-6:00	-	CST	1981 Dec 23
2428			-5:00	-	EST	1982 Dec  2
2429			-6:00	Mexico	C%sT
2430# Coahuila, Durango, Nuevo León, Tamaulipas (near US border)
2431Zone America/Matamoros	-6:40:00 -	LMT	1921 Dec 31 23:20:00
2432			-6:00	-	CST	1988
2433			-6:00	US	C%sT	1989
2434			-6:00	Mexico	C%sT	2010
2435			-6:00	US	C%sT
2436# Coahuila, Durango, Nuevo León, Tamaulipas (away from US border)
2437Zone America/Monterrey	-6:41:16 -	LMT	1921 Dec 31 23:18:44
2438			-6:00	-	CST	1988
2439			-6:00	US	C%sT	1989
2440			-6:00	Mexico	C%sT
2441# Central Mexico
2442Zone America/Mexico_City -6:36:36 -	LMT	1922 Jan  1  0:23:24
2443			-7:00	-	MST	1927 Jun 10 23:00
2444			-6:00	-	CST	1930 Nov 15
2445			-7:00	-	MST	1931 May  1 23:00
2446			-6:00	-	CST	1931 Oct
2447			-7:00	-	MST	1932 Apr  1
2448			-6:00	Mexico	C%sT	2001 Sep 30  2:00
2449			-6:00	-	CST	2002 Feb 20
2450			-6:00	Mexico	C%sT
2451# Chihuahua (near US border)
2452Zone America/Ojinaga	-6:57:40 -	LMT	1922 Jan  1  0:02:20
2453			-7:00	-	MST	1927 Jun 10 23:00
2454			-6:00	-	CST	1930 Nov 15
2455			-7:00	-	MST	1931 May  1 23:00
2456			-6:00	-	CST	1931 Oct
2457			-7:00	-	MST	1932 Apr  1
2458			-6:00	-	CST	1996
2459			-6:00	Mexico	C%sT	1998
2460			-6:00	-	CST	1998 Apr Sun>=1  3:00
2461			-7:00	Mexico	M%sT	2010
2462			-7:00	US	M%sT
2463# Chihuahua (away from US border)
2464Zone America/Chihuahua	-7:04:20 -	LMT	1921 Dec 31 23:55:40
2465			-7:00	-	MST	1927 Jun 10 23:00
2466			-6:00	-	CST	1930 Nov 15
2467			-7:00	-	MST	1931 May  1 23:00
2468			-6:00	-	CST	1931 Oct
2469			-7:00	-	MST	1932 Apr  1
2470			-6:00	-	CST	1996
2471			-6:00	Mexico	C%sT	1998
2472			-6:00	-	CST	1998 Apr Sun>=1  3:00
2473			-7:00	Mexico	M%sT
2474# Sonora
2475Zone America/Hermosillo	-7:23:52 -	LMT	1921 Dec 31 23:36:08
2476			-7:00	-	MST	1927 Jun 10 23:00
2477			-6:00	-	CST	1930 Nov 15
2478			-7:00	-	MST	1931 May  1 23:00
2479			-6:00	-	CST	1931 Oct
2480			-7:00	-	MST	1932 Apr  1
2481			-6:00	-	CST	1942 Apr 24
2482			-7:00	-	MST	1949 Jan 14
2483			-8:00	-	PST	1970
2484			-7:00	Mexico	M%sT	1999
2485			-7:00	-	MST
2486
2487# From Alexander Krivenyshev (2010-04-21):
2488# According to news, Bahía de Banderas (Mexican state of Nayarit)
2489# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to
2490# share the same time zone as nearby city Puerto Vallarta, Jalisco).
2491#
2492# (Spanish)
2493# Bahía de Banderas homologa su horario al del centro del
2494# país, a partir de este domingo
2495# http://www.nayarit.gob.mx/notes.asp?id=20748
2496#
2497# Bahía de Banderas homologa su horario con el del Centro del
2498# País
2499# 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
2500#
2501# (English)
2502# Puerto Vallarta and Bahía de Banderas: One Time Zone
2503# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml
2504# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html
2505#
2506# "Mexico's Senate approved the amendments to the Mexican Schedule System that
2507# will allow Bahía de Banderas and Puerto Vallarta to share the same time
2508# zone ..."
2509# Baja California Sur, Nayarit, Sinaloa
2510
2511# From Arthur David Olson (2010-05-01):
2512# Use "Bahia_Banderas" to keep the name to fourteen characters.
2513
2514# Mazatlán
2515Zone America/Mazatlan	-7:05:40 -	LMT	1921 Dec 31 23:54:20
2516			-7:00	-	MST	1927 Jun 10 23:00
2517			-6:00	-	CST	1930 Nov 15
2518			-7:00	-	MST	1931 May  1 23:00
2519			-6:00	-	CST	1931 Oct
2520			-7:00	-	MST	1932 Apr  1
2521			-6:00	-	CST	1942 Apr 24
2522			-7:00	-	MST	1949 Jan 14
2523			-8:00	-	PST	1970
2524			-7:00	Mexico	M%sT
2525
2526# Bahía de Banderas
2527Zone America/Bahia_Banderas	-7:01:00 -	LMT	1921 Dec 31 23:59:00
2528			-7:00	-	MST	1927 Jun 10 23:00
2529			-6:00	-	CST	1930 Nov 15
2530			-7:00	-	MST	1931 May  1 23:00
2531			-6:00	-	CST	1931 Oct
2532			-7:00	-	MST	1932 Apr  1
2533			-6:00	-	CST	1942 Apr 24
2534			-7:00	-	MST	1949 Jan 14
2535			-8:00	-	PST	1970
2536			-7:00	Mexico	M%sT	2010 Apr  4  2:00
2537			-6:00	Mexico	C%sT
2538
2539# Baja California (near US border)
2540Zone America/Tijuana	-7:48:04 -	LMT	1922 Jan  1  0:11:56
2541			-7:00	-	MST	1924
2542			-8:00	-	PST	1927 Jun 10 23:00
2543			-7:00	-	MST	1930 Nov 15
2544			-8:00	-	PST	1931 Apr  1
2545			-8:00	1:00	PDT	1931 Sep 30
2546			-8:00	-	PST	1942 Apr 24
2547			-8:00	1:00	PWT	1945 Aug 14 23:00u
2548			-8:00	1:00	PPT	1945 Nov 12 # Peace
2549			-8:00	-	PST	1948 Apr  5
2550			-8:00	1:00	PDT	1949 Jan 14
2551			-8:00	-	PST	1954
2552			-8:00	CA	P%sT	1961
2553			-8:00	-	PST	1976
2554			-8:00	US	P%sT	1996
2555			-8:00	Mexico	P%sT	2001
2556			-8:00	US	P%sT	2002 Feb 20
2557			-8:00	Mexico	P%sT	2010
2558			-8:00	US	P%sT
2559# Baja California (away from US border)
2560Zone America/Santa_Isabel	-7:39:28 -	LMT	1922 Jan  1  0:20:32
2561			-7:00	-	MST	1924
2562			-8:00	-	PST	1927 Jun 10 23:00
2563			-7:00	-	MST	1930 Nov 15
2564			-8:00	-	PST	1931 Apr  1
2565			-8:00	1:00	PDT	1931 Sep 30
2566			-8:00	-	PST	1942 Apr 24
2567			-8:00	1:00	PWT	1945 Aug 14 23:00u
2568			-8:00	1:00	PPT	1945 Nov 12 # Peace
2569			-8:00	-	PST	1948 Apr  5
2570			-8:00	1:00	PDT	1949 Jan 14
2571			-8:00	-	PST	1954
2572			-8:00	CA	P%sT	1961
2573			-8:00	-	PST	1976
2574			-8:00	US	P%sT	1996
2575			-8:00	Mexico	P%sT	2001
2576			-8:00	US	P%sT	2002 Feb 20
2577			-8:00	Mexico	P%sT
2578# From Paul Eggert (2006-03-22):
2579# Formerly there was an America/Ensenada zone, which differed from
2580# America/Tijuana only in that it did not observe DST from 1976
2581# through 1995.  This was as per Shanks (1999).  But Shanks & Pottenger say
2582# Ensenada did not observe DST from 1948 through 1975.  Guy Harris reports
2583# that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and
2584# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that
2585# DST-observance was a town-by-town matter back then.  This concerns
2586# data after 1970 so most likely there should be at least one Zone
2587# other than America/Tijuana for Baja, but it's not clear yet what its
2588# name or contents should be.
2589#
2590# Revillagigedo Is
2591# no information
2592
2593###############################################################################
2594
2595# Anguilla
2596# Antigua and Barbuda
2597# See America/Port_of_Spain.
2598
2599# Bahamas
2600#
2601# For 1899 Milne gives -5:09:29.5; round that.
2602#
2603# From Sue Williams (2006-12-07):
2604# The Bahamas announced about a month ago that they plan to change their DST
2605# rules to sync with the U.S. starting in 2007....
2606# http://www.jonesbahamas.com/?c=45&a=10412
2607
2608# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2609Rule	Bahamas	1964	1975	-	Oct	lastSun	2:00	0	S
2610Rule	Bahamas	1964	1975	-	Apr	lastSun	2:00	1:00	D
2611# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2612Zone	America/Nassau	-5:09:30 -	LMT	1912 Mar 2
2613			-5:00	Bahamas	E%sT	1976
2614			-5:00	US	E%sT
2615
2616# Barbados
2617
2618# For 1899 Milne gives -3:58:29.2; round that.
2619
2620# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2621Rule	Barb	1977	only	-	Jun	12	2:00	1:00	D
2622Rule	Barb	1977	1978	-	Oct	Sun>=1	2:00	0	S
2623Rule	Barb	1978	1980	-	Apr	Sun>=15	2:00	1:00	D
2624Rule	Barb	1979	only	-	Sep	30	2:00	0	S
2625Rule	Barb	1980	only	-	Sep	25	2:00	0	S
2626# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2627Zone America/Barbados	-3:58:29 -	LMT	1924 # Bridgetown
2628			-3:58:29 -	BMT	1932 # Bridgetown Mean Time
2629			-4:00	Barb	A%sT
2630
2631# Belize
2632# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.
2633# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2634Rule	Belize	1918	1942	-	Oct	Sun>=2	0:00	0:30	HD
2635Rule	Belize	1919	1943	-	Feb	Sun>=9	0:00	0	S
2636Rule	Belize	1973	only	-	Dec	 5	0:00	1:00	D
2637Rule	Belize	1974	only	-	Feb	 9	0:00	0	S
2638Rule	Belize	1982	only	-	Dec	18	0:00	1:00	D
2639Rule	Belize	1983	only	-	Feb	12	0:00	0	S
2640# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2641Zone	America/Belize	-5:52:48 -	LMT	1912 Apr
2642			-6:00	Belize	C%sT
2643
2644# Bermuda
2645
2646# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower,
2647# Bermuda dockyard, Ireland I; round that.
2648
2649# From Dan Jones, reporting in The Royal Gazette (2006-06-26):
2650
2651# Next year, however, clocks in the US will go forward on the second Sunday
2652# in March, until the first Sunday in November.  And, after the Time Zone
2653# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
2654# Friday, the same thing will happen in Bermuda.
2655# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135
2656
2657# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2658Zone Atlantic/Bermuda	-4:19:18 -	LMT	1930 Jan  1  2:00 # Hamilton
2659			-4:00	-	AST	1974 Apr 28  2:00
2660			-4:00	Canada	A%sT	1976
2661			-4:00	US	A%sT
2662
2663# Cayman Is
2664# See America/Panama.
2665
2666# Costa Rica
2667
2668# Milne gives -5:36:13.3 as San José mean time; round to nearest.
2669
2670# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2671Rule	CR	1979	1980	-	Feb	lastSun	0:00	1:00	D
2672Rule	CR	1979	1980	-	Jun	Sun>=1	0:00	0	S
2673Rule	CR	1991	1992	-	Jan	Sat>=15	0:00	1:00	D
2674# IATA SSIM (1991-09) says the following was at 1:00;
2675# go with Shanks & Pottenger.
2676Rule	CR	1991	only	-	Jul	 1	0:00	0	S
2677Rule	CR	1992	only	-	Mar	15	0:00	0	S
2678# There are too many San Josés elsewhere, so we'll use 'Costa Rica'.
2679# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2680Zone America/Costa_Rica	-5:36:13 -	LMT	1890        # San José
2681			-5:36:13 -	SJMT	1921 Jan 15 # San José Mean Time
2682			-6:00	CR	C%sT
2683# Coco
2684# no information; probably like America/Costa_Rica
2685
2686# Cuba
2687
2688# From Paul Eggert (2013-02-21):
2689# Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57
2690# for the port, and -5:30 for meteorological observations.
2691# For now, stick with Shanks & Pottenger.
2692
2693# From Arthur David Olson (1999-03-29):
2694# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
2695# the Cuban National Team and the Baltimore Orioles was carried live on
2696# the Orioles Radio Network, including affiliate WTOP in Washington, DC.
2697# During the game, play-by-play announcer Jim Hunter noted that
2698# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
2699# Time today."  (The "two hour" remark referred to losing one hour of
2700# sleep on 1999-03-28 - when the announcers were in Cuba as it switched
2701# to DST - and one more hour on 1999-04-04 - when the announcers will have
2702# returned to Baltimore, which switches on that date.)
2703
2704# From Steffen Thorsen (2013-11-11):
2705# DST start in Cuba in 2004 ... does not follow the same rules as the
2706# years before.  The correct date should be Sunday 2004-03-28 00:00 ...
2707# https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html
2708
2709# From Evert van der Veer via Steffen Thorsen (2004-10-28):
2710# Cuba is not going back to standard time this year.
2711# From Paul Eggert (2006-03-22):
2712# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html
2713# says that it's due to a problem at the Antonio Guiteras
2714# thermoelectric plant, and says "This October there will be no return
2715# to normal hours (after daylight saving time)".
2716# For now, let's assume that it's a temporary measure.
2717
2718# From Carlos A. Carnero Delgado (2005-11-12):
2719# This year (just like in 2004-2005) there's no change in time zone
2720# adjustment in Cuba.  We will stay in daylight saving time:
2721# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html
2722
2723# From Jesper Nørgaard Welen (2006-10-21):
2724# An article in GRANMA INTERNACIONAL claims that Cuba will end
2725# the 3 years of permanent DST next weekend, see
2726# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html
2727# "On Saturday night, October 28 going into Sunday, October 29, at 01:00,
2728# watches should be set back one hour - going back to 00:00 hours - returning
2729# to the normal schedule....
2730
2731# From Paul Eggert (2007-03-02):
2732# <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday,
2733# says Cuban clocks will advance at midnight on March 10.
2734# For lack of better information, assume Cuba will use US rules,
2735# except that it switches at midnight standard time as usual.
2736#
2737# From Steffen Thorsen (2007-10-25):
2738# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week
2739# earlier - on the last Sunday of October, just like in 2006.
2740#
2741# He supplied these references:
2742#
2743# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES
2744# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm
2745#
2746# From Alex Krivenyshev (2007-10-25):
2747# Here is also article from Granma (Cuba):
2748#
2749# Regirá el Horario Normal desde el próximo domingo 28 de octubre
2750# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html
2751#
2752# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html
2753
2754# From Arthur David Olson (2008-03-09):
2755# I'm in Maryland which is now observing United States Eastern Daylight
2756# Time. At 9:44 local time I used RealPlayer to listen to
2757# http://media.enet.cu/radioreloj
2758# a Cuban information station, and heard
2759# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"),
2760# indicating that Cuba is still on standard time.
2761
2762# From Steffen Thorsen (2008-03-12):
2763# It seems that Cuba will start DST on Sunday, 2007-03-16...
2764# It was announced yesterday, according to this source (in Spanish):
2765# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm
2766#
2767# Some more background information is posted here:
2768# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html
2769#
2770# The article also says that Cuba has been observing DST since 1963,
2771# while Shanks (and tzdata) has 1965 as the first date (except in the
2772# 1940's). Many other web pages in Cuba also claim that it has been
2773# observed since 1963, but with the exception of 1970 - an exception
2774# which is not present in tzdata/Shanks. So there is a chance we need to
2775# change some historic records as well.
2776#
2777# One example:
2778# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm
2779
2780# From Jesper Nørgaard Welen (2008-03-13):
2781# The Cuban time change has just been confirmed on the most authoritative
2782# web site, the Granma.  Please check out
2783# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html
2784#
2785# Basically as expected after Steffen Thorsen's information, the change
2786# will take place midnight between Saturday and Sunday.
2787
2788# From Arthur David Olson (2008-03-12):
2789# Assume Sun>=15 (third Sunday) going forward.
2790
2791# From Alexander Krivenyshev (2009-03-04)
2792# According to the Radio Reloj - Cuba will start Daylight Saving Time on
2793# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009-
2794# not on midnight March 14 / March 15 as previously thought.
2795#
2796# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html
2797# (in Spanish)
2798
2799# From Arthur David Olson (2009-03-09)
2800# I listened over the Internet to
2801# http://media.enet.cu/readioreloj
2802# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the
2803# the time was announced as "diez cinco" - the same time as here, indicating
2804# that has indeed switched to DST. Assume second Sunday from 2009 forward.
2805
2806# From Steffen Thorsen (2011-03-08):
2807# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00
2808# this year. Nothing about the end date known so far (if that has
2809# changed at all).
2810#
2811# Source:
2812# http://granma.co.cu/2011/03/08/nacional/artic01.html
2813#
2814# Our info:
2815# http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html
2816#
2817# From Steffen Thorsen (2011-10-30)
2818# Cuba will end DST two weeks later this year. Instead of going back
2819# tonight, it has been delayed to 2011-11-13 at 01:00.
2820#
2821# One source (Spanish)
2822# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html
2823#
2824# Our page:
2825# http://www.timeanddate.com/news/time/cuba-time-changes-2011.html
2826#
2827# From Steffen Thorsen (2012-03-01)
2828# According to Radio Reloj, Cuba will start DST on Midnight between March
2829# 31 and April 1.
2830#
2831# Radio Reloj has the following info (Spanish):
2832# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril
2833#
2834# Our info on it:
2835# http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html
2836
2837# From Steffen Thorsen (2012-11-03):
2838# Radio Reloj and many other sources report that Cuba is changing back
2839# to standard time on 2012-11-04:
2840# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre
2841# From Paul Eggert (2012-11-03):
2842# For now, assume the future rule is first Sunday in November.
2843
2844# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2845Rule	Cuba	1928	only	-	Jun	10	0:00	1:00	D
2846Rule	Cuba	1928	only	-	Oct	10	0:00	0	S
2847Rule	Cuba	1940	1942	-	Jun	Sun>=1	0:00	1:00	D
2848Rule	Cuba	1940	1942	-	Sep	Sun>=1	0:00	0	S
2849Rule	Cuba	1945	1946	-	Jun	Sun>=1	0:00	1:00	D
2850Rule	Cuba	1945	1946	-	Sep	Sun>=1	0:00	0	S
2851Rule	Cuba	1965	only	-	Jun	1	0:00	1:00	D
2852Rule	Cuba	1965	only	-	Sep	30	0:00	0	S
2853Rule	Cuba	1966	only	-	May	29	0:00	1:00	D
2854Rule	Cuba	1966	only	-	Oct	2	0:00	0	S
2855Rule	Cuba	1967	only	-	Apr	8	0:00	1:00	D
2856Rule	Cuba	1967	1968	-	Sep	Sun>=8	0:00	0	S
2857Rule	Cuba	1968	only	-	Apr	14	0:00	1:00	D
2858Rule	Cuba	1969	1977	-	Apr	lastSun	0:00	1:00	D
2859Rule	Cuba	1969	1971	-	Oct	lastSun	0:00	0	S
2860Rule	Cuba	1972	1974	-	Oct	8	0:00	0	S
2861Rule	Cuba	1975	1977	-	Oct	lastSun	0:00	0	S
2862Rule	Cuba	1978	only	-	May	7	0:00	1:00	D
2863Rule	Cuba	1978	1990	-	Oct	Sun>=8	0:00	0	S
2864Rule	Cuba	1979	1980	-	Mar	Sun>=15	0:00	1:00	D
2865Rule	Cuba	1981	1985	-	May	Sun>=5	0:00	1:00	D
2866Rule	Cuba	1986	1989	-	Mar	Sun>=14	0:00	1:00	D
2867Rule	Cuba	1990	1997	-	Apr	Sun>=1	0:00	1:00	D
2868Rule	Cuba	1991	1995	-	Oct	Sun>=8	0:00s	0	S
2869Rule	Cuba	1996	only	-	Oct	 6	0:00s	0	S
2870Rule	Cuba	1997	only	-	Oct	12	0:00s	0	S
2871Rule	Cuba	1998	1999	-	Mar	lastSun	0:00s	1:00	D
2872Rule	Cuba	1998	2003	-	Oct	lastSun	0:00s	0	S
2873Rule	Cuba	2000	2003	-	Apr	Sun>=1	0:00s	1:00	D
2874Rule	Cuba	2004	only	-	Mar	lastSun	0:00s	1:00	D
2875Rule	Cuba	2006	2010	-	Oct	lastSun	0:00s	0	S
2876Rule	Cuba	2007	only	-	Mar	Sun>=8	0:00s	1:00	D
2877Rule	Cuba	2008	only	-	Mar	Sun>=15	0:00s	1:00	D
2878Rule	Cuba	2009	2010	-	Mar	Sun>=8	0:00s	1:00	D
2879Rule	Cuba	2011	only	-	Mar	Sun>=15	0:00s	1:00	D
2880Rule	Cuba	2011	only	-	Nov	13	0:00s	0	S
2881Rule	Cuba	2012	only	-	Apr	1	0:00s	1:00	D
2882Rule	Cuba	2012	max	-	Nov	Sun>=1	0:00s	0	S
2883Rule	Cuba	2013	max	-	Mar	Sun>=8	0:00s	1:00	D
2884
2885# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2886Zone	America/Havana	-5:29:28 -	LMT	1890
2887			-5:29:36 -	HMT	1925 Jul 19 12:00 # Havana MT
2888			-5:00	Cuba	C%sT
2889
2890# Dominica
2891# See America/Port_of_Spain.
2892
2893# Dominican Republic
2894
2895# From Steffen Thorsen (2000-10-30):
2896# Enrique Morales reported to me that the Dominican Republic has changed the
2897# time zone to Eastern Standard Time as of Sunday 29 at 2 am....
2898# http://www.listin.com.do/antes/261000/republica/princi.html
2899
2900# From Paul Eggert (2000-12-04):
2901# That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
2902
2903# From Rives McDow (2000-12-01):
2904# Dominican Republic changed its mind and presidential decree on Tuesday,
2905# November 28, 2000, with a new decree.  On Sunday, December 3 at 1:00 AM the
2906# Dominican Republic will be reverting to 8 hours from the International Date
2907# Line, and will not be using DST in the foreseeable future.  The reason they
2908# decided to use DST was to be in synch with Puerto Rico, who was also going
2909# to implement DST.  When Puerto Rico didn't implement DST, the president
2910# decided to revert.
2911
2912
2913# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2914Rule	DR	1966	only	-	Oct	30	0:00	1:00	D
2915Rule	DR	1967	only	-	Feb	28	0:00	0	S
2916Rule	DR	1969	1973	-	Oct	lastSun	0:00	0:30	HD
2917Rule	DR	1970	only	-	Feb	21	0:00	0	S
2918Rule	DR	1971	only	-	Jan	20	0:00	0	S
2919Rule	DR	1972	1974	-	Jan	21	0:00	0	S
2920# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2921Zone America/Santo_Domingo -4:39:36 -	LMT	1890
2922			-4:40	-	SDMT	1933 Apr  1 12:00 # S. Dom. MT
2923			-5:00	DR	E%sT	1974 Oct 27
2924			-4:00	-	AST	2000 Oct 29  2:00
2925			-5:00	US	E%sT	2000 Dec  3  1:00
2926			-4:00	-	AST
2927
2928# El Salvador
2929
2930# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2931Rule	Salv	1987	1988	-	May	Sun>=1	0:00	1:00	D
2932Rule	Salv	1987	1988	-	Sep	lastSun	0:00	0	S
2933# There are too many San Salvadors elsewhere, so use America/El_Salvador
2934# instead of America/San_Salvador.
2935# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2936Zone America/El_Salvador -5:56:48 -	LMT	1921 # San Salvador
2937			-6:00	Salv	C%sT
2938
2939# Grenada
2940# Guadeloupe
2941# St Barthélemy
2942# St Martin (French part)
2943# See America/Port_of_Spain.
2944
2945# Guatemala
2946#
2947# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
2948# Diario Co Latino, at
2949# <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>,
2950# says in an article dated 2006-04-19 that the Guatemalan government had
2951# decided on that date to advance official time by 60 minutes, to lessen the
2952# impact of the elevated cost of oil....  Daylight saving time will last from
2953# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
2954# From Paul Eggert (2006-06-22):
2955# The Ministry of Energy and Mines, press release CP-15/2006
2956# (2006-04-19), says DST ends at 24:00.  See
2957# http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf
2958
2959# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2960Rule	Guat	1973	only	-	Nov	25	0:00	1:00	D
2961Rule	Guat	1974	only	-	Feb	24	0:00	0	S
2962Rule	Guat	1983	only	-	May	21	0:00	1:00	D
2963Rule	Guat	1983	only	-	Sep	22	0:00	0	S
2964Rule	Guat	1991	only	-	Mar	23	0:00	1:00	D
2965Rule	Guat	1991	only	-	Sep	 7	0:00	0	S
2966Rule	Guat	2006	only	-	Apr	30	0:00	1:00	D
2967Rule	Guat	2006	only	-	Oct	 1	0:00	0	S
2968# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2969Zone America/Guatemala	-6:02:04 -	LMT	1918 Oct 5
2970			-6:00	Guat	C%sT
2971
2972# Haiti
2973# From Gwillim Law (2005-04-15):
2974# Risto O. Nykänen wrote me that Haiti is now on DST.
2975# I searched for confirmation, and I found a press release
2976# on the Web page of the Haitian Consulate in Chicago (2005-03-31),
2977# <http://www.haitianconsulate.org/time.doc>.  Translated from French, it says:
2978#
2979#  "The Prime Minister's Communication Office notifies the public in general
2980#   and the press in particular that, following a decision of the Interior
2981#   Ministry and the Territorial Collectivities [I suppose that means the
2982#   provinces], Haiti will move to Eastern Daylight Time in the night from next
2983#   Saturday the 2nd to Sunday the 3rd.
2984#
2985#  "Consequently, the Prime Minister's Communication Office wishes to inform
2986#   the population that the country's clocks will be set forward one hour
2987#   starting at midnight.  This provision will hold until the last Saturday in
2988#   October 2005.
2989#
2990#  "Port-au-Prince, March 31, 2005"
2991#
2992# From Steffen Thorsen (2006-04-04):
2993# I have been informed by users that Haiti observes DST this year like
2994# last year, so the current "only" rule for 2005 might be changed to a
2995# "max" rule or to last until 2006. (Who knows if they will observe DST
2996# next year or if they will extend their DST like US/Canada next year).
2997#
2998# I have found this article about it (in French):
2999# http://www.haitipressnetwork.com/news.cfm?articleID=7612
3000#
3001# The reason seems to be an energy crisis.
3002
3003# From Stephen Colebourne (2007-02-22):
3004# Some IATA info: Haiti won't be having DST in 2007.
3005
3006# From Steffen Thorsen (2012-03-11):
3007# According to several news sources, Haiti will observe DST this year,
3008# apparently using the same start and end date as USA/Canada.
3009# So this means they have already changed their time.
3010#
3011# http://www.alterpresse.org/spip.php?article12510
3012# http://radiovision2000haiti.net/home/?p=13253
3013#
3014# From Arthur David Olson (2012-03-11):
3015# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to
3016# 3:00 a.m. rather than the traditional Haitian jump at midnight.
3017# Assume a US-style fall back as well.
3018
3019# From Steffen Thorsen (2013-03-10):
3020# It appears that Haiti is observing DST this year as well, same rules
3021# as US/Canada.  They did it last year as well, and it looks like they
3022# are going to observe DST every year now...
3023#
3024# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/
3025# http://www.canalplushaiti.net/?p=6714
3026
3027# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
3028Rule	Haiti	1983	only	-	May	8	0:00	1:00	D
3029Rule	Haiti	1984	1987	-	Apr	lastSun	0:00	1:00	D
3030Rule	Haiti	1983	1987	-	Oct	lastSun	0:00	0	S
3031# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
3032# Go with IATA.
3033Rule	Haiti	1988	1997	-	Apr	Sun>=1	1:00s	1:00	D
3034Rule	Haiti	1988	1997	-	Oct	lastSun	1:00s	0	S
3035Rule	Haiti	2005	2006	-	Apr	Sun>=1	0:00	1:00	D
3036Rule	Haiti	2005	2006	-	Oct	lastSun	0:00	0	S
3037Rule	Haiti	2012	max	-	Mar	Sun>=8	2:00	1:00	D
3038Rule	Haiti	2012	max	-	Nov	Sun>=1	2:00	0	S
3039# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3040Zone America/Port-au-Prince -4:49:20 -	LMT	1890
3041			-4:49	-	PPMT	1917 Jan 24 12:00 # P-a-P MT
3042			-5:00	Haiti	E%sT
3043
3044# Honduras
3045# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.
3046
3047# From Paul Eggert (2006-05-05):
3048# worldtimezone.com reports a 2006-05-02 Spanish-language AP article
3049# saying Honduras will start using DST midnight Saturday, effective 4
3050# months until September.  La Tribuna reported today
3051# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president
3052# of Honduras, refused to back down on this.
3053
3054# From Jesper Nørgaard Welen (2006-08-08):
3055# It seems that Honduras has returned from DST to standard time this Monday at
3056# 00:00 hours (prolonging Sunday to 25 hours duration).
3057# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html
3058
3059# From Paul Eggert (2006-08-08):
3060# Also see Diario El Heraldo, The country returns to standard time (2006-08-08).
3061# http://www.elheraldo.hn/nota.php?nid=54941&sec=12
3062# It mentions executive decree 18-2006.
3063
3064# From Steffen Thorsen (2006-08-17):
3065# Honduras will observe DST from 2007 to 2009, exact dates are not
3066# published, I have located this authoritative source:
3067# http://www.presidencia.gob.hn/noticia.aspx?nId=47
3068
3069# From Steffen Thorsen (2007-03-30):
3070# http://www.laprensahn.com/pais_nota.php?id04962=7386
3071# So it seems that Honduras will not enter DST this year....
3072
3073# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
3074Rule	Hond	1987	1988	-	May	Sun>=1	0:00	1:00	D
3075Rule	Hond	1987	1988	-	Sep	lastSun	0:00	0	S
3076Rule	Hond	2006	only	-	May	Sun>=1	0:00	1:00	D
3077Rule	Hond	2006	only	-	Aug	Mon>=1	0:00	0	S
3078# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3079Zone America/Tegucigalpa -5:48:52 -	LMT	1921 Apr
3080			-6:00	Hond	C%sT
3081#
3082# Great Swan I ceded by US to Honduras in 1972
3083
3084# Jamaica
3085# Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an
3086# unspecified official document, and says "This time is used throughout the
3087# island".  Go with Milne.  Round to the nearest second as required by zic.
3088#
3089# Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but
3090# Lance Neita writes that Prime Minister Michael Manley decreed it January 5.
3091# Assume Neita meant Jan 6 02:00, the same as the US.  Neita also writes that
3092# Manley's supporters associated this act with Manley's nickname "Joshua"
3093# (recall that in the Bible the sun stood still at Joshua's request),
3094# and with the Rod of Correction which Manley said he had received from
3095# Haile Selassie, Emperor of Ethiopia.  See:
3096# Neita L. The politician in all of us. Jamaica Observer 2014-09-20
3097# http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647
3098#
3099# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3100Zone	America/Jamaica	-5:07:11 -	LMT	1890        # Kingston
3101			-5:07:11 -	KMT	1912 Feb    # Kingston Mean Time
3102			-5:00	-	EST	1974
3103			-5:00	US	E%sT	1984
3104			-5:00	-	EST
3105
3106# Martinique
3107# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3108Zone America/Martinique	-4:04:20 -      LMT	1890        # Fort-de-France
3109			-4:04:20 -	FFMT	1911 May    # Fort-de-France MT
3110			-4:00	-	AST	1980 Apr  6
3111			-4:00	1:00	ADT	1980 Sep 28
3112			-4:00	-	AST
3113
3114# Montserrat
3115# See America/Port_of_Spain.
3116
3117# Nicaragua
3118#
3119# This uses Shanks & Pottenger for times before 2005.
3120#
3121# From Steffen Thorsen (2005-04-12):
3122# I've got reports from 8 different people that Nicaragua just started
3123# DST on Sunday 2005-04-10, in order to save energy because of
3124# expensive petroleum.  The exact end date for DST is not yet
3125# announced, only "September" but some sites also say "mid-September".
3126# Some background information is available on the President's official site:
3127# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm
3128# The Decree, no 23-2005 is available here:
3129# 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
3130#
3131# From Paul Eggert (2005-05-01):
3132# The decree doesn't say anything about daylight saving, but for now let's
3133# assume that it is daylight saving....
3134#
3135# From Gwillim Law (2005-04-21):
3136# The Associated Press story on the time change, which can be found at
3137# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html
3138# and elsewhere, says (fifth paragraph, translated from Spanish): "The last
3139# time that a change of clocks was applied to save energy was in the year 2000
3140# during the Arnoldo Alemán administration."...
3141# The northamerica file says that Nicaragua has been on UTC-6 continuously
3142# since December 1998.  I wasn't able to find any details of Nicaraguan time
3143# changes in 2000.  Perhaps a note could be added to the northamerica file, to
3144# the effect that we have indirect evidence that DST was observed in 2000.
3145#
3146# From Jesper Nørgaard Welen (2005-11-02):
3147# Nicaragua left DST the 2005-10-02 at 00:00 (local time).
3148# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm
3149# (2005-09-26)
3150#
3151# From Jesper Nørgaard Welen (2006-05-05):
3152# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410
3153# (my informal translation)
3154# By order of the president of the republic, Enrique Bolaños, Nicaragua
3155# advanced by sixty minutes their official time, yesterday at 2 in the
3156# morning, and will stay that way until 30th of September.
3157#
3158# From Jesper Nørgaard Welen (2006-09-30):
3159# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf
3160# My informal translation runs:
3161# The natural sun time is restored in all the national territory, in that the
3162# time is returned one hour at 01:00 am of October 1 of 2006.
3163#
3164# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
3165Rule	Nic	1979	1980	-	Mar	Sun>=16	0:00	1:00	D
3166Rule	Nic	1979	1980	-	Jun	Mon>=23	0:00	0	S
3167Rule	Nic	2005	only	-	Apr	10	0:00	1:00	D
3168Rule	Nic	2005	only	-	Oct	Sun>=1	0:00	0	S
3169Rule	Nic	2006	only	-	Apr	30	2:00	1:00	D
3170Rule	Nic	2006	only	-	Oct	Sun>=1	1:00	0	S
3171# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3172Zone	America/Managua	-5:45:08 -	LMT	1890
3173			-5:45:12 -	MMT	1934 Jun 23 # Managua Mean Time?
3174			-6:00	-	CST	1973 May
3175			-5:00	-	EST	1975 Feb 16
3176			-6:00	Nic	C%sT	1992 Jan  1  4:00
3177			-5:00	-	EST	1992 Sep 24
3178			-6:00	-	CST	1993
3179			-5:00	-	EST	1997
3180			-6:00	Nic	C%sT
3181
3182# Panama
3183# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3184Zone	America/Panama	-5:18:08 -	LMT	1890
3185			-5:19:36 -	CMT	1908 Apr 22 # Colón Mean Time
3186			-5:00	-	EST
3187Link America/Panama America/Cayman
3188
3189# Puerto Rico
3190# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'.
3191# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3192Zone America/Puerto_Rico -4:24:25 -	LMT	1899 Mar 28 12:00 # San Juan
3193			-4:00	-	AST	1942 May  3
3194			-4:00	US	A%sT	1946
3195			-4:00	-	AST
3196
3197# St Kitts-Nevis
3198# St Lucia
3199# See America/Port_of_Spain.
3200
3201# St Pierre and Miquelon
3202# There are too many St Pierres elsewhere, so we'll use 'Miquelon'.
3203# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3204Zone America/Miquelon	-3:44:40 -	LMT	1911 May 15 # St Pierre
3205			-4:00	-	AST	1980 May
3206			-3:00	-	PMST	1987 # Pierre & Miquelon Time
3207			-3:00	Canada	PM%sT
3208
3209# St Vincent and the Grenadines
3210# See America/Port_of_Spain.
3211
3212# Turks and Caicos
3213#
3214# From Chris Dunn in
3215# http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007
3216# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3217# daylight saving dates for time changes have been adjusted to match
3218# the recent U.S. change of dates.
3219#
3220# From Brian Inglis (2007-04-28):
3221# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
3222# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
3223# rows before that there is an out of date entry for Oct:
3224# "Eastern Standard Times Begins 2007
3225# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time"
3226# indicating that the normal ET rules are followed.
3227#
3228# From Paul Eggert (2014-08-19):
3229# The 2014-08-13 Cabinet meeting decided to stay on UTC-4 year-round.  See:
3230# http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm
3231# Model this as a switch from EST/EDT to AST ...
3232# From Chris Walton (2014-11-04):
3233# ... the TCI government appears to have delayed the switch to
3234# "permanent daylight saving time" by one year....
3235# http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm
3236#
3237# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3238Zone America/Grand_Turk	-4:44:32 -	LMT	1890
3239			-5:07:11 -	KMT	1912 Feb # Kingston Mean Time
3240			-5:00	-	EST	1979
3241			-5:00	US	E%sT	2015 Nov Sun>=1 2:00
3242			-4:00	-	AST
3243
3244# British Virgin Is
3245# Virgin Is
3246# See America/Port_of_Spain.
3247
3248
3249# Local Variables:
3250# coding: utf-8
3251# End:
3252