xref: /freebsd/contrib/tzdata/northamerica (revision c9dbb1cc52b063bbd9ab078a7afc89a8696da659)
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 Brian Inglis (2015-07-20):
1239# From the historical weather station records available at:
1240# https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada
1241# Sydney shares the same time history as Glace Bay, so was
1242# likely to be the same across the island....
1243# Sydney, as the capital and most populous location, or Cape Breton, would
1244# have been better names for the zone had we known this in 1996.
1245
1246# From Paul Eggert (2015-07-20):
1247# Shanks & Pottenger write that since 1970 most of this region has been like
1248# Halifax.  Many locales did not observe peacetime DST until 1972;
1249# the Cape Breton area, represented by Glace Bay, is the largest we know of
1250# (Glace Bay was perhaps not the best name choice but no point changing now).
1251# Shanks & Pottenger also write that Liverpool, NS was the only town
1252# in Canada to observe DST in 1971 but not 1970; for now we'll assume
1253# this is a typo.
1254
1255# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1256Rule	Halifax	1916	only	-	Apr	 1	0:00	1:00	D
1257Rule	Halifax	1916	only	-	Oct	 1	0:00	0	S
1258Rule	Halifax	1920	only	-	May	 9	0:00	1:00	D
1259Rule	Halifax	1920	only	-	Aug	29	0:00	0	S
1260Rule	Halifax	1921	only	-	May	 6	0:00	1:00	D
1261Rule	Halifax	1921	1922	-	Sep	 5	0:00	0	S
1262Rule	Halifax	1922	only	-	Apr	30	0:00	1:00	D
1263Rule	Halifax	1923	1925	-	May	Sun>=1	0:00	1:00	D
1264Rule	Halifax	1923	only	-	Sep	 4	0:00	0	S
1265Rule	Halifax	1924	only	-	Sep	15	0:00	0	S
1266Rule	Halifax	1925	only	-	Sep	28	0:00	0	S
1267Rule	Halifax	1926	only	-	May	16	0:00	1:00	D
1268Rule	Halifax	1926	only	-	Sep	13	0:00	0	S
1269Rule	Halifax	1927	only	-	May	 1	0:00	1:00	D
1270Rule	Halifax	1927	only	-	Sep	26	0:00	0	S
1271Rule	Halifax	1928	1931	-	May	Sun>=8	0:00	1:00	D
1272Rule	Halifax	1928	only	-	Sep	 9	0:00	0	S
1273Rule	Halifax	1929	only	-	Sep	 3	0:00	0	S
1274Rule	Halifax	1930	only	-	Sep	15	0:00	0	S
1275Rule	Halifax	1931	1932	-	Sep	Mon>=24	0:00	0	S
1276Rule	Halifax	1932	only	-	May	 1	0:00	1:00	D
1277Rule	Halifax	1933	only	-	Apr	30	0:00	1:00	D
1278Rule	Halifax	1933	only	-	Oct	 2	0:00	0	S
1279Rule	Halifax	1934	only	-	May	20	0:00	1:00	D
1280Rule	Halifax	1934	only	-	Sep	16	0:00	0	S
1281Rule	Halifax	1935	only	-	Jun	 2	0:00	1:00	D
1282Rule	Halifax	1935	only	-	Sep	30	0:00	0	S
1283Rule	Halifax	1936	only	-	Jun	 1	0:00	1:00	D
1284Rule	Halifax	1936	only	-	Sep	14	0:00	0	S
1285Rule	Halifax	1937	1938	-	May	Sun>=1	0:00	1:00	D
1286Rule	Halifax	1937	1941	-	Sep	Mon>=24	0:00	0	S
1287Rule	Halifax	1939	only	-	May	28	0:00	1:00	D
1288Rule	Halifax	1940	1941	-	May	Sun>=1	0:00	1:00	D
1289Rule	Halifax	1946	1949	-	Apr	lastSun	2:00	1:00	D
1290Rule	Halifax	1946	1949	-	Sep	lastSun	2:00	0	S
1291Rule	Halifax	1951	1954	-	Apr	lastSun	2:00	1:00	D
1292Rule	Halifax	1951	1954	-	Sep	lastSun	2:00	0	S
1293Rule	Halifax	1956	1959	-	Apr	lastSun	2:00	1:00	D
1294Rule	Halifax	1956	1959	-	Sep	lastSun	2:00	0	S
1295Rule	Halifax	1962	1973	-	Apr	lastSun	2:00	1:00	D
1296Rule	Halifax	1962	1973	-	Oct	lastSun	2:00	0	S
1297# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1298Zone America/Halifax	-4:14:24 -	LMT	1902 Jun 15
1299			-4:00	Halifax	A%sT	1918
1300			-4:00	Canada	A%sT	1919
1301			-4:00	Halifax	A%sT	1942 Feb  9  2:00s
1302			-4:00	Canada	A%sT	1946
1303			-4:00	Halifax	A%sT	1974
1304			-4:00	Canada	A%sT
1305Zone America/Glace_Bay	-3:59:48 -	LMT	1902 Jun 15
1306			-4:00	Canada	A%sT	1953
1307			-4:00	Halifax	A%sT	1954
1308			-4:00	-	AST	1972
1309			-4:00	Halifax	A%sT	1974
1310			-4:00	Canada	A%sT
1311
1312# New Brunswick
1313
1314# From Paul Eggert (2007-01-31):
1315# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>
1316# says they changed at 00:01 through 2006, and
1317# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
1318# clear that this was the case since at least 1993.
1319# For now, assume it started in 1993.
1320
1321# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1322Rule	Moncton	1933	1935	-	Jun	Sun>=8	1:00	1:00	D
1323Rule	Moncton	1933	1935	-	Sep	Sun>=8	1:00	0	S
1324Rule	Moncton	1936	1938	-	Jun	Sun>=1	1:00	1:00	D
1325Rule	Moncton	1936	1938	-	Sep	Sun>=1	1:00	0	S
1326Rule	Moncton	1939	only	-	May	27	1:00	1:00	D
1327Rule	Moncton	1939	1941	-	Sep	Sat>=21	1:00	0	S
1328Rule	Moncton	1940	only	-	May	19	1:00	1:00	D
1329Rule	Moncton	1941	only	-	May	 4	1:00	1:00	D
1330Rule	Moncton	1946	1972	-	Apr	lastSun	2:00	1:00	D
1331Rule	Moncton	1946	1956	-	Sep	lastSun	2:00	0	S
1332Rule	Moncton	1957	1972	-	Oct	lastSun	2:00	0	S
1333Rule	Moncton	1993	2006	-	Apr	Sun>=1	0:01	1:00	D
1334Rule	Moncton	1993	2006	-	Oct	lastSun	0:01	0	S
1335# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1336Zone America/Moncton	-4:19:08 -	LMT	1883 Dec  9
1337			-5:00	-	EST	1902 Jun 15
1338			-4:00	Canada	A%sT	1933
1339			-4:00	Moncton	A%sT	1942
1340			-4:00	Canada	A%sT	1946
1341			-4:00	Moncton	A%sT	1973
1342			-4:00	Canada	A%sT	1993
1343			-4:00	Moncton	A%sT	2007
1344			-4:00	Canada	A%sT
1345
1346# Quebec
1347
1348# From Paul Eggert (2015-03-24):
1349# See America/Toronto for most of Quebec, including Montreal.
1350#
1351# Matthews and Vincent (1998) also write that Quebec east of the -63
1352# meridian is supposed to observe AST, but residents as far east as
1353# Natashquan use EST/EDT, and residents east of Natashquan use AST.
1354# The Quebec department of justice writes in
1355# "The situation in Minganie and Basse-Côte-Nord"
1356# http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm
1357# that the coastal strip from just east of Natashquan to Blanc-Sablon
1358# observes Atlantic standard time all year round.
1359# http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en
1360# says this common practice was codified into law as of 2007.
1361# For lack of better info, guess this practice began around 1970, contra to
1362# Shanks & Pottenger who have this region observing AST/ADT.
1363
1364# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1365Zone America/Blanc-Sablon -3:48:28 -	LMT	1884
1366			-4:00	Canada	A%sT	1970
1367			-4:00	-	AST
1368
1369# Ontario
1370
1371# From Paul Eggert (2006-07-09):
1372# Shanks & Pottenger write that since 1970 most of Ontario has been like
1373# Toronto.
1374# Thunder Bay skipped DST in 1973.
1375# Many smaller locales did not observe peacetime DST until 1974;
1376# Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1377# Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
1378
1379# From Mark Brader (2003-07-26):
1380# [According to the Toronto Star] Orillia, Ontario, adopted DST
1381# effective Saturday, 1912-06-22, 22:00; the article mentions that
1382# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
1383# have already done so.  In Orillia DST was to run until Saturday,
1384# 1912-08-31 (no time mentioned), but it was met with considerable
1385# hostility from certain segments of the public, and was revoked after
1386# only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but
1387# presumably that should be -07-06.  (1912-06-19, -07-12; also letters
1388# earlier in June).
1389#
1390# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).
1391
1392# From Paul Eggert (1997-10-17):
1393# Mark Brader writes that an article in the 1997-10-14 Toronto Star
1394# says that Atikokan, Ontario currently does not observe DST,
1395# but will vote on 11-10 whether to use EST/EDT.
1396# He also writes that the Ontario Time Act (1990, Chapter T.9)
1397# http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html
1398# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.
1399# Officially Atikokan is therefore on CST/CDT, and most likely this report
1400# concerns a non-official time observed as a matter of local practice.
1401#
1402# From Paul Eggert (2000-10-02):
1403# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and
1404# New Osnaburgh observe CST all year, that Big Trout Lake observes
1405# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in
1406# violation of the official Ontario rules.
1407#
1408# From Paul Eggert (2006-07-09):
1409# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the
1410# 2005-07-21 Chronicle-Journal, which said:
1411#
1412#	The clocks in Atikokan stay set on standard time year-round.
1413#	This means they spend about half the time on central time and
1414#	the other half on eastern time.
1415#
1416#	For the most part, the system works, Mayor Dennis Brown said.
1417#
1418#	"The majority of businesses in Atikokan deal more with Eastern
1419#	Canada, but there are some that deal with Western Canada," he
1420#	said.  "I don't see any changes happening here."
1421#
1422# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang
1423# [New Osnaburgh] follow the same practice."
1424
1425# From Garry McKinnon (2006-07-14) via Chris Walton:
1426# I chatted with a member of my board who has an outstanding memory
1427# and a long history in Atikokan (and in the telecom industry) and he
1428# can say for certain that Atikokan has been practicing the current
1429# time keeping since 1952, at least.
1430
1431# From Paul Eggert (2006-07-17):
1432# Shanks & Pottenger say that Atikokan has agreed with Rainy River
1433# ever since standard time was introduced, but the information from
1434# McKinnon sounds more authoritative.  For now, assume that Atikokan
1435# switched to EST immediately after WWII era daylight saving time
1436# ended.  This matches the old (less-populous) America/Coral_Harbour
1437# entry since our cutoff date of 1970, so we can move
1438# America/Coral_Harbour to the 'backward' file.
1439
1440# From Mark Brader (2010-03-06):
1441#
1442# Currently the database has:
1443#
1444# # Ontario
1445#
1446# # From Paul Eggert (2006-07-09):
1447# # Shanks & Pottenger write that since 1970 most of Ontario has been like
1448# # Toronto.
1449# # Thunder Bay skipped DST in 1973.
1450# # Many smaller locales did not observe peacetime DST until 1974;
1451# # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1452#
1453# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom
1454# right corner of page 1, it says that Toronto will return to standard
1455# time at 2 am Sunday morning (which agrees with the database), and that:
1456#
1457#     The one-hour setback will go into effect throughout most of Ontario,
1458#     except in areas like Windsor which remains on standard time all year.
1459#
1460# Windsor is, of course, a lot larger than Nipigon.
1461#
1462# I only came across this incidentally.  I don't know if Windsor began
1463# observing DST when Detroit did, or in 1974, or on some other date.
1464#
1465# By the way, the article continues by noting that:
1466#
1467#     Some cities in the United States have pushed the deadline back
1468#     three weeks and will change over from daylight saving in October.
1469
1470# From Arthur David Olson (2010-07-17):
1471#
1472# "Standard Time and Time Zones in Canada" appeared in
1473# The Journal of The Royal Astronomical Society of Canada,
1474# volume 26, number 2 (February 1932) and, as of 2010-07-17,
1475# was available at
1476# http://adsabs.harvard.edu/full/1932JRASC..26...49S
1477#
1478# It includes the text below (starting on page 57):
1479#
1480#   A list of the places in Canada using daylight saving time would
1481# require yearly revision. From information kindly furnished by
1482# the provincial governments and by the postmasters in many cities
1483# and towns, it is found that the following places used daylight sav-
1484# ing in 1930. The information for the province of Quebec is definite,
1485# for the other provinces only approximate:
1486#
1487#	Province	Daylight saving time used
1488# Prince Edward Island	Not used.
1489# Nova Scotia		In Halifax only.
1490# New Brunswick		In St. John only.
1491# Quebec		In the following places:
1492#			Montreal	Lachine
1493#			Quebec		Mont-Royal
1494#			Lévis		Iberville
1495#			St. Lambert	Cap de la Madelèine
1496#			Verdun		Loretteville
1497#			Westmount	Richmond
1498#			Outremont	St. Jérôme
1499#			Longueuil	Greenfield Park
1500#			Arvida		Waterloo
1501#			Chambly-Canton	Beaulieu
1502#			Melbourne	La Tuque
1503#			St. Théophile	Buckingham
1504# Ontario		Used generally in the cities and towns along
1505#			the southerly part of the province. Not
1506#			used in the northwesterly part.
1507# Manitoba		Not used.
1508# Saskatchewan		In Regina only.
1509# Alberta		Not used.
1510# British Columbia	Not used.
1511#
1512#   With some exceptions, the use of daylight saving may be said to be limited
1513# to those cities and towns lying between Quebec city and Windsor, Ont.
1514
1515# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1516Rule	Toronto	1919	only	-	Mar	30	23:30	1:00	D
1517Rule	Toronto	1919	only	-	Oct	26	0:00	0	S
1518Rule	Toronto	1920	only	-	May	 2	2:00	1:00	D
1519Rule	Toronto	1920	only	-	Sep	26	0:00	0	S
1520Rule	Toronto	1921	only	-	May	15	2:00	1:00	D
1521Rule	Toronto	1921	only	-	Sep	15	2:00	0	S
1522Rule	Toronto	1922	1923	-	May	Sun>=8	2:00	1:00	D
1523# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
1524# was meant.
1525Rule	Toronto	1922	1926	-	Sep	Sun>=15	2:00	0	S
1526Rule	Toronto	1924	1927	-	May	Sun>=1	2:00	1:00	D
1527# The 1927-to-1939 rules can be expressed more simply as
1528# Rule	Toronto	1927	1937	-	Sep	Sun>=25	2:00	0	S
1529# Rule	Toronto	1928	1937	-	Apr	Sun>=25	2:00	1:00	D
1530# Rule	Toronto	1938	1940	-	Apr	lastSun	2:00	1:00	D
1531# Rule	Toronto	1938	1939	-	Sep	lastSun	2:00	0	S
1532# The rules below avoid use of Sun>=25
1533# (which pre-2004 versions of zic cannot handle).
1534Rule	Toronto	1927	1932	-	Sep	lastSun	2:00	0	S
1535Rule	Toronto	1928	1931	-	Apr	lastSun	2:00	1:00	D
1536Rule	Toronto	1932	only	-	May	1	2:00	1:00	D
1537Rule	Toronto	1933	1940	-	Apr	lastSun	2:00	1:00	D
1538Rule	Toronto	1933	only	-	Oct	1	2:00	0	S
1539Rule	Toronto	1934	1939	-	Sep	lastSun	2:00	0	S
1540Rule	Toronto	1945	1946	-	Sep	lastSun	2:00	0	S
1541Rule	Toronto	1946	only	-	Apr	lastSun	2:00	1:00	D
1542Rule	Toronto	1947	1949	-	Apr	lastSun	0:00	1:00	D
1543Rule	Toronto	1947	1948	-	Sep	lastSun	0:00	0	S
1544Rule	Toronto	1949	only	-	Nov	lastSun	0:00	0	S
1545Rule	Toronto	1950	1973	-	Apr	lastSun	2:00	1:00	D
1546Rule	Toronto	1950	only	-	Nov	lastSun	2:00	0	S
1547Rule	Toronto	1951	1956	-	Sep	lastSun	2:00	0	S
1548# Shanks & Pottenger say Toronto ended DST a week early in 1971,
1549# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this
1550# is wrong, and that he had confirmed it by checking the 1971-10-30
1551# Toronto Star, which said that DST was ending 1971-10-31 as usual.
1552Rule	Toronto	1957	1973	-	Oct	lastSun	2:00	0	S
1553
1554# From Paul Eggert (2003-07-27):
1555# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and
1556# Port Arthur, Ontario, the principle of the Bill has been in
1557# operation for the past three years, and in the City of Moose Jaw,
1558# Saskatchewan, for one year."
1559
1560# From David Bryan via Tory Tronrud, Director/Curator,
1561# Thunder Bay Museum (2003-11-12):
1562# There is some suggestion, however, that, by-law or not, daylight
1563# savings time was being practiced in Fort William and Port Arthur
1564# before 1909.... [I]n 1910, the line between the Eastern and Central
1565# Time Zones was permanently moved about two hundred miles west to
1566# include the Thunder Bay area....  When Canada adopted daylight
1567# savings time in 1916, Fort William and Port Arthur, having done so
1568# already, did not change their clocks....  During the Second World
1569# War,... [t]he cities agreed to implement DST during the summer
1570# months for the remainder of the war years.
1571
1572# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1573Zone America/Toronto	-5:17:32 -	LMT	1895
1574			-5:00	Canada	E%sT	1919
1575			-5:00	Toronto	E%sT	1942 Feb  9  2:00s
1576			-5:00	Canada	E%sT	1946
1577			-5:00	Toronto	E%sT	1974
1578			-5:00	Canada	E%sT
1579Zone America/Thunder_Bay -5:57:00 -	LMT	1895
1580			-6:00	-	CST	1910
1581			-5:00	-	EST	1942
1582			-5:00	Canada	E%sT	1970
1583			-5:00	Toronto	E%sT	1973
1584			-5:00	-	EST	1974
1585			-5:00	Canada	E%sT
1586Zone America/Nipigon	-5:53:04 -	LMT	1895
1587			-5:00	Canada	E%sT	1940 Sep 29
1588			-5:00	1:00	EDT	1942 Feb  9  2:00s
1589			-5:00	Canada	E%sT
1590Zone America/Rainy_River -6:18:16 -	LMT	1895
1591			-6:00	Canada	C%sT	1940 Sep 29
1592			-6:00	1:00	CDT	1942 Feb  9  2:00s
1593			-6:00	Canada	C%sT
1594Zone America/Atikokan	-6:06:28 -	LMT	1895
1595			-6:00	Canada	C%sT	1940 Sep 29
1596			-6:00	1:00	CDT	1942 Feb  9  2:00s
1597			-6:00	Canada	C%sT	1945 Sep 30  2:00
1598			-5:00	-	EST
1599
1600
1601# Manitoba
1602
1603# From Rob Douglas (2006-04-06):
1604# the old Manitoba Time Act - as amended by Bill 2, assented to
1605# March 27, 1987 ... said ...
1606# "between two o'clock Central Standard Time in the morning of
1607# the first Sunday of April of each year and two o'clock Central
1608# Standard Time in the morning of the last Sunday of October next
1609# following, one hour in advance of Central Standard Time."...
1610# I believe that the English legislation [of the old time act] had
1611# been assented to (March 22, 1967)....
1612# Also, as far as I can tell, there was no order-in-council varying
1613# the time of Daylight Saving Time for 2005 and so the provisions of
1614# the 1987 version would apply - the changeover was at 2:00 Central
1615# Standard Time (i.e. not until 3:00 Central Daylight Time).
1616
1617# From Paul Eggert (2006-04-10):
1618# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s)
1619# starting 1966.  Since 02:00s is clearly correct for 1967 on, assume
1620# it was also 02:00s in 1966.
1621
1622# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1623Rule	Winn	1916	only	-	Apr	23	0:00	1:00	D
1624Rule	Winn	1916	only	-	Sep	17	0:00	0	S
1625Rule	Winn	1918	only	-	Apr	14	2:00	1:00	D
1626Rule	Winn	1918	only	-	Oct	27	2:00	0	S
1627Rule	Winn	1937	only	-	May	16	2:00	1:00	D
1628Rule	Winn	1937	only	-	Sep	26	2:00	0	S
1629Rule	Winn	1942	only	-	Feb	 9	2:00	1:00	W # War
1630Rule	Winn	1945	only	-	Aug	14	23:00u	1:00	P # Peace
1631Rule	Winn	1945	only	-	Sep	lastSun	2:00	0	S
1632Rule	Winn	1946	only	-	May	12	2:00	1:00	D
1633Rule	Winn	1946	only	-	Oct	13	2:00	0	S
1634Rule	Winn	1947	1949	-	Apr	lastSun	2:00	1:00	D
1635Rule	Winn	1947	1949	-	Sep	lastSun	2:00	0	S
1636Rule	Winn	1950	only	-	May	 1	2:00	1:00	D
1637Rule	Winn	1950	only	-	Sep	30	2:00	0	S
1638Rule	Winn	1951	1960	-	Apr	lastSun	2:00	1:00	D
1639Rule	Winn	1951	1958	-	Sep	lastSun	2:00	0	S
1640Rule	Winn	1959	only	-	Oct	lastSun	2:00	0	S
1641Rule	Winn	1960	only	-	Sep	lastSun	2:00	0	S
1642Rule	Winn	1963	only	-	Apr	lastSun	2:00	1:00	D
1643Rule	Winn	1963	only	-	Sep	22	2:00	0	S
1644Rule	Winn	1966	1986	-	Apr	lastSun	2:00s	1:00	D
1645Rule	Winn	1966	2005	-	Oct	lastSun	2:00s	0	S
1646Rule	Winn	1987	2005	-	Apr	Sun>=1	2:00s	1:00	D
1647# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1648Zone America/Winnipeg	-6:28:36 -	LMT	1887 Jul 16
1649			-6:00	Winn	C%sT	2006
1650			-6:00	Canada	C%sT
1651
1652
1653# Saskatchewan
1654
1655# From Mark Brader (2003-07-26):
1656# The first actual adoption of DST in Canada was at the municipal
1657# level.  As the [Toronto] Star put it (1912-06-07), "While people
1658# elsewhere have long been talking of legislation to save daylight,
1659# the city of Moose Jaw [Saskatchewan] has acted on its own hook."
1660# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
1661# presumably late evening, as below), and would run until "the end of
1662# the summer".  The discrepancy between municipal time and railroad
1663# time was noted.
1664
1665# From Paul Eggert (2003-07-27):
1666# Willett (1914-03) notes that DST "has been in operation ... in the
1667# City of Moose Jaw, Saskatchewan, for one year."
1668
1669# From Paul Eggert (2006-03-22):
1670# Shanks & Pottenger say that since 1970 this region has mostly been as Regina.
1671# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
1672# Other western towns (e.g. Lloydminster) are like Edmonton.
1673# Matthews and Vincent (1998) write that Denare Beach and Creighton
1674# are like Winnipeg, in violation of Saskatchewan law.
1675
1676# From W. Jones (1992-11-06):
1677# The. . .below is based on information I got from our law library, the
1678# provincial archives, and the provincial Community Services department.
1679# A precise history would require digging through newspaper archives, and
1680# since you didn't say what you wanted, I didn't bother.
1681#
1682# Saskatchewan is split by a time zone meridian (105W) and over the years
1683# the boundary became pretty ragged as communities near it reevaluated
1684# their affiliations in one direction or the other.  In 1965 a provincial
1685# referendum favoured legislating common time practices.
1686#
1687# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
1688# Saskatchewan 1978) was proclaimed, and established that the eastern
1689# part of Saskatchewan would use CST year round, that districts in
1690# northwest Saskatchewan would by default follow CST but could opt to
1691# follow Mountain Time rules (thus 1 hour difference in the winter and
1692# zero in the summer), and that districts in southwest Saskatchewan would
1693# by default follow MT but could opt to follow CST.
1694#
1695# It took a few years for the dust to settle (I know one story of a town
1696# on one time zone having its school in another, such that a mom had to
1697# serve her family lunch in two shifts), but presently it seems that only
1698# a few towns on the border with Alberta (e.g. Lloydminster) follow MT
1699# rules any more; all other districts appear to have used CST year round
1700# since sometime in the 1960s.
1701
1702# From Chris Walton (2006-06-26):
1703# The Saskatchewan time act which was last updated in 1996 is about 30 pages
1704# long and rather painful to read.
1705# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf
1706
1707# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1708Rule	Regina	1918	only	-	Apr	14	2:00	1:00	D
1709Rule	Regina	1918	only	-	Oct	27	2:00	0	S
1710Rule	Regina	1930	1934	-	May	Sun>=1	0:00	1:00	D
1711Rule	Regina	1930	1934	-	Oct	Sun>=1	0:00	0	S
1712Rule	Regina	1937	1941	-	Apr	Sun>=8	0:00	1:00	D
1713Rule	Regina	1937	only	-	Oct	Sun>=8	0:00	0	S
1714Rule	Regina	1938	only	-	Oct	Sun>=1	0:00	0	S
1715Rule	Regina	1939	1941	-	Oct	Sun>=8	0:00	0	S
1716Rule	Regina	1942	only	-	Feb	 9	2:00	1:00	W # War
1717Rule	Regina	1945	only	-	Aug	14	23:00u	1:00	P # Peace
1718Rule	Regina	1945	only	-	Sep	lastSun	2:00	0	S
1719Rule	Regina	1946	only	-	Apr	Sun>=8	2:00	1:00	D
1720Rule	Regina	1946	only	-	Oct	Sun>=8	2:00	0	S
1721Rule	Regina	1947	1957	-	Apr	lastSun	2:00	1:00	D
1722Rule	Regina	1947	1957	-	Sep	lastSun	2:00	0	S
1723Rule	Regina	1959	only	-	Apr	lastSun	2:00	1:00	D
1724Rule	Regina	1959	only	-	Oct	lastSun	2:00	0	S
1725#
1726Rule	Swift	1957	only	-	Apr	lastSun	2:00	1:00	D
1727Rule	Swift	1957	only	-	Oct	lastSun	2:00	0	S
1728Rule	Swift	1959	1961	-	Apr	lastSun	2:00	1:00	D
1729Rule	Swift	1959	only	-	Oct	lastSun	2:00	0	S
1730Rule	Swift	1960	1961	-	Sep	lastSun	2:00	0	S
1731# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1732Zone America/Regina	-6:58:36 -	LMT	1905 Sep
1733			-7:00	Regina	M%sT	1960 Apr lastSun  2:00
1734			-6:00	-	CST
1735Zone America/Swift_Current -7:11:20 -	LMT	1905 Sep
1736			-7:00	Canada	M%sT	1946 Apr lastSun  2:00
1737			-7:00	Regina	M%sT	1950
1738			-7:00	Swift	M%sT	1972 Apr lastSun  2:00
1739			-6:00	-	CST
1740
1741
1742# Alberta
1743
1744# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1745Rule	Edm	1918	1919	-	Apr	Sun>=8	2:00	1:00	D
1746Rule	Edm	1918	only	-	Oct	27	2:00	0	S
1747Rule	Edm	1919	only	-	May	27	2:00	0	S
1748Rule	Edm	1920	1923	-	Apr	lastSun	2:00	1:00	D
1749Rule	Edm	1920	only	-	Oct	lastSun	2:00	0	S
1750Rule	Edm	1921	1923	-	Sep	lastSun	2:00	0	S
1751Rule	Edm	1942	only	-	Feb	 9	2:00	1:00	W # War
1752Rule	Edm	1945	only	-	Aug	14	23:00u	1:00	P # Peace
1753Rule	Edm	1945	only	-	Sep	lastSun	2:00	0	S
1754Rule	Edm	1947	only	-	Apr	lastSun	2:00	1:00	D
1755Rule	Edm	1947	only	-	Sep	lastSun	2:00	0	S
1756Rule	Edm	1967	only	-	Apr	lastSun	2:00	1:00	D
1757Rule	Edm	1967	only	-	Oct	lastSun	2:00	0	S
1758Rule	Edm	1969	only	-	Apr	lastSun	2:00	1:00	D
1759Rule	Edm	1969	only	-	Oct	lastSun	2:00	0	S
1760Rule	Edm	1972	1986	-	Apr	lastSun	2:00	1:00	D
1761Rule	Edm	1972	2006	-	Oct	lastSun	2:00	0	S
1762# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1763Zone America/Edmonton	-7:33:52 -	LMT	1906 Sep
1764			-7:00	Edm	M%sT	1987
1765			-7:00	Canada	M%sT
1766
1767
1768# British Columbia
1769
1770# From Paul Eggert (2006-03-22):
1771# Shanks & Pottenger write that since 1970 most of this region has
1772# been like Vancouver.
1773# Dawson Creek uses MST.  Much of east BC is like Edmonton.
1774# Matthews and Vincent (1998) write that Creston is like Dawson Creek.
1775
1776# It seems though that (re: Creston) is not entirely correct:
1777
1778# From Chris Walton (2011-12-01):
1779# There are two areas within the Canadian province of British Columbia
1780# that do not currently observe daylight saving:
1781# a) The Creston Valley (includes the town of Creston and surrounding area)
1782# b) The eastern half of the Peace River Regional District
1783# (includes the cities of Dawson Creek and Fort St. John)
1784
1785# Earlier this year I stumbled across a detailed article about the time
1786# keeping history of Creston; it was written by Tammy Hardwick who is the
1787# manager of the Creston & District Museum. The article was written in May 2009.
1788# http://www.ilovecreston.com/?p=articles&t=spec&ar=260
1789# According to the article, Creston has not changed its clocks since June 1918.
1790# i.e. Creston has been stuck on UTC-7 for 93 years.
1791# Dawson Creek, on the other hand, changed its clocks as recently as April 1972.
1792
1793# Unfortunately the exact date for the time change in June 1918 remains
1794# unknown and will be difficult to ascertain.  I e-mailed Tammy a few months
1795# ago to ask if Sunday June 2 was a reasonable guess.  She said it was just
1796# as plausible as any other date (in June).  She also said that after writing
1797# the article she had discovered another time change in 1916; this is the
1798# subject of another article which she wrote in October 2010.
1799# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56
1800
1801# Here is a summary of the three clock change events in Creston's history:
1802# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7)
1803# Exact date unknown
1804# 2. Oct 1916: switch to Pacific Standard Time (GMT-8)
1805# Exact date in October unknown; Sunday October 1 is a reasonable guess.
1806# 3. June 1918: switch to Pacific Daylight Time (GMT-7)
1807# Exact date in June unknown; Sunday June 2 is a reasonable guess.
1808# note 1:
1809# On Oct 27/1918 when daylight saving ended in the rest of Canada,
1810# Creston did not change its clocks.
1811# note 2:
1812# During WWII when the Federal Government legislated a mandatory clock change,
1813# Creston did not oblige.
1814# note 3:
1815# There is no guarantee that Creston will remain on Mountain Standard Time
1816# (UTC-7) forever.
1817# The subject was debated at least once this year by the town Council.
1818# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html
1819
1820# During a period WWII, summer time (Daylight saying) was mandatory in Canada.
1821# In Creston, that was handled by shifting the area to PST (-8:00) then applying
1822# summer time to cause the offset to be -7:00, the same as it had been before
1823# the change.  It can be argued that the timezone abbreviation during this
1824# period should be PDT rather than MST, but that doesn't seem important enough
1825# (to anyone) to further complicate the rules.
1826
1827# The transition dates (and times) are guesses.
1828
1829# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1830Rule	Vanc	1918	only	-	Apr	14	2:00	1:00	D
1831Rule	Vanc	1918	only	-	Oct	27	2:00	0	S
1832Rule	Vanc	1942	only	-	Feb	 9	2:00	1:00	W # War
1833Rule	Vanc	1945	only	-	Aug	14	23:00u	1:00	P # Peace
1834Rule	Vanc	1945	only	-	Sep	30	2:00	0	S
1835Rule	Vanc	1946	1986	-	Apr	lastSun	2:00	1:00	D
1836Rule	Vanc	1946	only	-	Oct	13	2:00	0	S
1837Rule	Vanc	1947	1961	-	Sep	lastSun	2:00	0	S
1838Rule	Vanc	1962	2006	-	Oct	lastSun	2:00	0	S
1839# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1840Zone America/Vancouver	-8:12:28 -	LMT	1884
1841			-8:00	Vanc	P%sT	1987
1842			-8:00	Canada	P%sT
1843Zone America/Dawson_Creek -8:00:56 -	LMT	1884
1844			-8:00	Canada	P%sT	1947
1845			-8:00	Vanc	P%sT	1972 Aug 30  2:00
1846			-7:00	-	MST
1847Zone America/Creston	-7:46:04 -	LMT	1884
1848			-7:00	-	MST	1916 Oct 1
1849			-8:00	-	PST	1918 Jun 2
1850			-7:00	-	MST
1851
1852# Northwest Territories, Nunavut, Yukon
1853
1854# From Paul Eggert (2006-03-22):
1855# Dawson switched to PST in 1973.  Inuvik switched to MST in 1979.
1856# Mathew Englander (1996-10-07) gives the following refs:
1857#	* 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
1858#	c. 7 defines Yukon standard time as UTC-9....
1859#	see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
1860#	[http://canlii.ca/t/7vhg]
1861#	* C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
1862#	* O.I.C. 1980/02 established DST.
1863#	* O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
1864
1865# From Brian Inglis (2015-04-14):
1866#
1867# I tried to trace the history of Yukon time and found the following
1868# regulations, giving the reference title and URL if found, regulation name,
1869# and relevant quote if available.  Each regulation specifically revokes its
1870# predecessor.  The final reference is to the current Interpretation Act
1871# authorizing and resulting from these regulatory changes.
1872#
1873# Only recent regulations were retrievable via Yukon government site search or
1874# index, and only some via Canadian legal sources.  Other sources used include
1875# articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS
1876# Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and
1877# 1970 quoted below; each article includes current extracts from provincial
1878# and territorial ST and DST regulations at the end, summaries and details of
1879# standard times and daylight saving time at many locations across Canada,
1880# with time zone maps, tables and calculations for Canadian Sunrise, Sunset,
1881# and LMST; they also cover many countries and global locations, with a chart
1882# and table showing current Universal Time offsets, and may be useful as
1883# another source of information for 1970 and earlier.
1884#
1885# * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26,
1886#   pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS)
1887#   http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75:
1888#   Yukon Interpretation Ordinance
1889#   Yukon standard time is the local mean time at the one hundred and
1890#   thirty-fifth meridian.
1891#
1892# * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.;
1893#   JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System
1894#   (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1:
1895#   Yukon Interpretation Ordinance, 1955, Chap. 16.
1896#
1897#     (1) Subject to this section, standard time shall be reckoned as nine
1898#     hours behind Greenwich Time and called Yukon Standard Time.
1899#
1900#     (2) Notwithstanding subsection (1), the Commissioner may make regulations
1901#     varying the manner of reckoning standard time.
1902#
1903# * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance
1904#   http://? - no online source found
1905#
1906# * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC,
1907#   Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS)
1908#   http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon
1909#   Territory Commissioner's Order 1967-59 Interpretation Ordinance ...
1910#
1911#     1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon
1912#     Territory on 27th January, 1966, is hereby revoked.
1913#
1914#     2. Yukon (East) Standard Time as defined by section 36 of the
1915#     Interpretation Ordinance from and after mid-night on the 28th day of May,
1916#     1967 shall be reckoned in the same manner as Pacific Standard Time, that
1917#     is to say, eight hours behind Greenwich Time in the area of the Yukon
1918#     Territory lying east of the 138th degree longitude west.
1919#
1920#     3. In the remainder of the Territory, lying west of the 138th degree
1921#     longitude west, Yukon (West) Standard Time shall be reckoned as nine
1922#     hours behind Greenwich Time.
1923#
1924# * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214
1925#   http://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html
1926#   C.O. 1973/214 INTERPRETATION ACT ...
1927#
1928#     1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby
1929#     revoked.
1930#
1931#     2. Yukon Standard Time as defined by section 36 of the Interpretation
1932#     Act from and after midnight on the twenty-eighth day of October, 1973
1933#     shall be reckoned in the same manner as Pacific Standard Time, that is
1934#     to say eight hours behind Greenwich Time.
1935#
1936# * O.I.C. 1980/02 INTERPRETATION ACT
1937#   http://? - no online source found
1938#
1939# * Yukon Daylight Saving Time, YOIC 1987/56
1940#   http://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html
1941#   O.I.C. 1987/056 INTERPRETATION ACT ...
1942#
1943#   In every year between
1944#     (a) two o'clock in the morning in the first Sunday in April, and
1945#     (b) two o'clock in the morning in the last Sunday in October,
1946#   Standard Time shall be reckoned as seven hours behind Greenwich Time and
1947#   called Yukon Daylight Saving Time.
1948#   ...
1949#   Dated ... 9th day of March, A.D., 1987.
1950#
1951# * Yukon Daylight Saving Time 2006, YOIC 2006/127
1952#   http://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html
1953#   O.I.C. 2006/127 INTERPRETATION ACT ...
1954#
1955#     1. In Yukon each year the time for general purposes shall be 7 hours
1956#     behind Greenwich mean time during the period commencing at two o'clock
1957#     in the forenoon on the second Sunday of March and ending at two o'clock
1958#     in the forenoon on the first Sunday of November and shall be called
1959#     Yukon Daylight Saving Time.
1960#
1961#     2. Order-in-Council 1987/56 is revoked.
1962#
1963#     3. This order comes into force January 1, 2007.
1964#
1965# * Interpretation Act, RSY 2002, c 125
1966# http://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html
1967
1968# From Rives McDow (1999-09-04):
1969# Nunavut ... moved ... to incorporate the whole territory into one time zone.
1970# Nunavut moves to single time zone Oct. 31
1971# http://www.nunatsiaq.com/nunavut/nvt90903_13.html
1972#
1973# From Antoine Leca (1999-09-06):
1974# We then need to create a new timezone for the Kitikmeot region of Nunavut
1975# to differentiate it from the Yellowknife region.
1976
1977# From Paul Eggert (1999-09-20):
1978# Basic Facts: The New Territory
1979# http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html
1980# (1999) reports that Pangnirtung operates on eastern time,
1981# and that Coral Harbour does not observe DST.  We don't know when
1982# Pangnirtung switched to eastern time; we'll guess 1995.
1983
1984# From Rives McDow (1999-11-08):
1985# On October 31, when the rest of Nunavut went to Central time,
1986# Pangnirtung wobbled.  Here is the result of their wobble:
1987#
1988# The following businesses and organizations in Pangnirtung use Central Time:
1989#
1990#	First Air, Power Corp, Nunavut Construction, Health Center, RCMP,
1991#	Eastern Arctic National Parks, A & D Specialist
1992#
1993# The following businesses and organizations in Pangnirtung use Eastern Time:
1994#
1995#	Hamlet office, All other businesses, Both schools, Airport operator
1996#
1997# This has made for an interesting situation there, which warranted the news.
1998# No one there that I spoke with seems concerned, or has plans to
1999# change the local methods of keeping time, as it evidently does not
2000# really interfere with any activities or make things difficult locally.
2001# They plan to celebrate New Year's turn-over twice, one hour apart,
2002# so it appears that the situation will last at least that long.
2003# The Nunavut Intergovernmental Affairs hopes that they will "come to
2004# their senses", but the locals evidently don't see any problem with
2005# the current state of affairs.
2006
2007# From Michaela Rodrigue, writing in the
2008# Nunatsiaq News (1999-11-19):
2009# http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html
2010# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones,
2011# central - or Nunavut time - for government offices, and eastern time
2012# for municipal offices and schools....  Igloolik [was similar but then]
2013# made the switch to central time on Saturday, Nov. 6.
2014
2015# From Paul Eggert (2000-10-02):
2016# Matthews and Vincent (1998) say the following, but we lack histories
2017# for these potential new Zones.
2018#
2019# The Canadian Forces station at Alert uses Eastern Time while the
2020# handful of residents at the Eureka weather station [in the Central
2021# zone] skip daylight savings.  Baffin Island, which is crossed by the
2022# Central, Eastern and Atlantic Time zones only uses Eastern Time.
2023# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of
2024# Central Time and Southampton Island [in the Central zone] is not
2025# required to use daylight savings.
2026
2027# From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html>
2028# Nunavut now has two time zones (2000-11-10):
2029# The Nunavut government would allow its employees in Kugluktuk and
2030# Cambridge Bay to operate on central time year-round, putting them
2031# one hour behind the rest of Nunavut for six months during the winter.
2032# At the end of October the two communities had rebelled against
2033# Nunavut's unified time zone, refusing to shift to eastern time with
2034# the rest of the territory for the winter.  Cambridge Bay remained on
2035# central time, while Kugluktuk, even farther west, reverted to
2036# mountain time, which they had used before the advent of Nunavut's
2037# unified time zone in 1999.
2038#
2039# From Rives McDow (2001-01-20), quoting the Nunavut government:
2040# The preceding decision came into effect at midnight, Saturday Nov 4, 2000.
2041
2042# From Paul Eggert (2000-12-04):
2043# Let's just keep track of the official times for now.
2044
2045# From Rives McDow (2001-03-07):
2046# The premier of Nunavut has issued a ministerial statement advising
2047# that effective 2001-04-01, the territory of Nunavut will revert
2048# back to three time zones (mountain, central, and eastern).  Of the
2049# cities in Nunavut, Coral Harbor is the only one that I know of that
2050# has said it will not observe dst, staying on EST year round.  I'm
2051# checking for more info, and will get back to you if I come up with
2052# more.
2053# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]
2054
2055# From Gwillim Law (2005-05-21):
2056# According to ...
2057# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp
2058# (from a 1998 Canadian Geographic article), the de facto and de jure time
2059# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year
2060# round.  Using Google, it's easy to find other websites that confirm this.
2061# I wasn't able to find how far back this time regimen goes, but since it
2062# predates the creation of Nunavut, it probably goes back many years....
2063# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used.
2064#
2065# From Paul Eggert (2014-10-17):
2066# For lack of better information, assume that Southampton Island observed
2067# daylight saving only during wartime.  Gwillim Law's email also
2068# mentioned maps now maintained by National Research Council Canada;
2069# see above for an up-to-date link.
2070
2071# From Chris Walton (2007-03-01):
2072# ... the community of Resolute (located on Cornwallis Island in
2073# Nunavut) moved from Central Time to Eastern Time last November.
2074# Basically the community did not change its clocks at the end of
2075# daylight saving....
2076# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html
2077
2078# From Chris Walton (2011-03-21):
2079# Back in 2007 I initiated the creation of a new "zone file" for Resolute
2080# Bay. Resolute Bay is a small community located about 900km north of
2081# the Arctic Circle. The zone file was required because Resolute Bay had
2082# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007.
2083#
2084# According to new information which I received last week, Resolute Bay
2085# went back to using UTC-6 in the winter of 2007-2008...
2086#
2087# On March 11/2007 most of Canada went onto daylight saving. On March
2088# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I
2089# talked to somebody that was both knowledgeable and helpful. I was able
2090# to confirm that Resolute Bay was still operating on UTC-5. It was
2091# explained to me that Resolute Bay had been on the Eastern Time zone
2092# (EST) in the winter, and was now back on the Central Time zone (CDT).
2093# i.e. the time zone had changed twice in the last year but the clocks
2094# had not moved. The residents had to know which time zone they were in
2095# so they could follow the correct TV schedule...
2096#
2097# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I
2098# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature
2099# of the phone call, I decided to seek out an alternate source of
2100# information. I found an e-mail address for somebody by the name of
2101# Stephanie Adams whose job was listed as "Inns North Support Officer for
2102# Arctic Co-operatives." I was under the impression that Stephanie lived
2103# and worked in Resolute Bay...
2104#
2105# On March 14/2011 I phoned the hamlet office again. I was told that
2106# Resolute Bay had been using Central Standard Time over the winter of
2107# 2010-2011 and that the clocks had therefore been moved one hour ahead
2108# on March 13/2011. The person I talked to was aware that Resolute Bay
2109# had previously experimented with Eastern Standard Time but he could not
2110# tell me when the practice had stopped.
2111#
2112# On March 17/2011 I searched the Web to find an e-mail address of
2113# somebody that might be able to tell me exactly when Resolute Bay went
2114# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz
2115# used to be the mayor of Resolute Bay and he apparently owns half the
2116# businesses including "South Camp Inn." This website has some info on
2117# Aziz:
2118# http://www.uphere.ca/node/493
2119#
2120# I sent Aziz an e-mail asking when Resolute Bay had stopped using
2121# Eastern Standard Time.
2122#
2123# Aziz responded quickly with this: "hi, The time was not changed for the
2124# 1 year only, the following year, the community went back to the old way
2125# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in
2126# the winter Zulu plus 6 hrs"
2127#
2128# This of course conflicted with everything I had ascertained in November 2008.
2129#
2130# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz
2131# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You
2132# may want to check with the weather office in Resolute Bay or do a
2133# search on the weather through Env. Canada. web site"
2134#
2135# If I had realized the Stephanie did not live in Resolute Bay I would
2136# never have contacted her.  I now believe that all the information I
2137# obtained in November 2008 should be ignored...
2138# I apologize for reporting incorrect information in 2008.
2139
2140# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2141Rule	NT_YK	1918	only	-	Apr	14	2:00	1:00	D
2142Rule	NT_YK	1918	only	-	Oct	27	2:00	0	S
2143Rule	NT_YK	1919	only	-	May	25	2:00	1:00	D
2144Rule	NT_YK	1919	only	-	Nov	 1	0:00	0	S
2145Rule	NT_YK	1942	only	-	Feb	 9	2:00	1:00	W # War
2146Rule	NT_YK	1945	only	-	Aug	14	23:00u	1:00	P # Peace
2147Rule	NT_YK	1945	only	-	Sep	30	2:00	0	S
2148Rule	NT_YK	1965	only	-	Apr	lastSun	0:00	2:00	DD
2149Rule	NT_YK	1965	only	-	Oct	lastSun	2:00	0	S
2150Rule	NT_YK	1980	1986	-	Apr	lastSun	2:00	1:00	D
2151Rule	NT_YK	1980	2006	-	Oct	lastSun	2:00	0	S
2152Rule	NT_YK	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
2153# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2154# aka Panniqtuuq
2155Zone America/Pangnirtung 0	-	zzz	1921 # trading post est.
2156			-4:00	NT_YK	A%sT	1995 Apr Sun>=1  2:00
2157			-5:00	Canada	E%sT	1999 Oct 31  2:00
2158			-6:00	Canada	C%sT	2000 Oct 29  2:00
2159			-5:00	Canada	E%sT
2160# formerly Frobisher Bay
2161Zone America/Iqaluit	0	-	zzz	1942 Aug # Frobisher Bay est.
2162			-5:00	NT_YK	E%sT	1999 Oct 31  2:00
2163			-6:00	Canada	C%sT	2000 Oct 29  2:00
2164			-5:00	Canada	E%sT
2165# aka Qausuittuq
2166Zone America/Resolute	0	-	zzz	1947 Aug 31 # Resolute founded
2167			-6:00	NT_YK	C%sT	2000 Oct 29  2:00
2168			-5:00	-	EST	2001 Apr  1  3:00
2169			-6:00	Canada	C%sT	2006 Oct 29  2:00
2170			-5:00	-	EST	2007 Mar 11  3:00
2171			-6:00	Canada	C%sT
2172# aka Kangiqiniq
2173Zone America/Rankin_Inlet 0	-	zzz	1957 # Rankin Inlet founded
2174			-6:00	NT_YK	C%sT	2000 Oct 29  2:00
2175			-5:00	-	EST	2001 Apr  1  3:00
2176			-6:00	Canada	C%sT
2177# aka Iqaluktuuttiaq
2178Zone America/Cambridge_Bay 0	-	zzz	1920 # trading post est.?
2179			-7:00	NT_YK	M%sT	1999 Oct 31  2:00
2180			-6:00	Canada	C%sT	2000 Oct 29  2:00
2181			-5:00	-	EST	2000 Nov  5  0:00
2182			-6:00	-	CST	2001 Apr  1  3:00
2183			-7:00	Canada	M%sT
2184Zone America/Yellowknife 0	-	zzz	1935 # Yellowknife founded?
2185			-7:00	NT_YK	M%sT	1980
2186			-7:00	Canada	M%sT
2187Zone America/Inuvik	0	-	zzz	1953 # Inuvik founded
2188			-8:00	NT_YK	P%sT	1979 Apr lastSun  2:00
2189			-7:00	NT_YK	M%sT	1980
2190			-7:00	Canada	M%sT
2191Zone America/Whitehorse	-9:00:12 -	LMT	1900 Aug 20
2192			-9:00	NT_YK	Y%sT	1967 May 28  0:00
2193			-8:00	NT_YK	P%sT	1980
2194			-8:00	Canada	P%sT
2195Zone America/Dawson	-9:17:40 -	LMT	1900 Aug 20
2196			-9:00	NT_YK	Y%sT	1973 Oct 28  0:00
2197			-8:00	NT_YK	P%sT	1980
2198			-8:00	Canada	P%sT
2199
2200
2201###############################################################################
2202
2203# Mexico
2204
2205# From Paul Eggert (2014-12-07):
2206# The Investigation and Analysis Service of the
2207# Mexican Library of Congress (MLoC) has published a
2208# history of Mexican local time (in Spanish)
2209# http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm
2210#
2211# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC.
2212# (In all cases we go with the MLoC.)
2213# S&P report that Baja was at -8:00 in 1922/1923.
2214# S&P say the 1930 transition in Baja was 1930-11-16.
2215# S&P report no DST during summer 1931.
2216# S&P report a transition at 1932-03-30 23:00, not 1932-04-01.
2217
2218# From Gwillim Law (2001-02-20):
2219# There are some other discrepancies between the Decrees page and the
2220# tz database.  I think they can best be explained by supposing that
2221# the researchers who prepared the Decrees page failed to find some of
2222# the relevant documents.
2223
2224# From Alan Perry (1996-02-15):
2225# A guy from our Mexico subsidiary finally found the Presidential Decree
2226# outlining the timezone changes in Mexico.
2227#
2228# ------------- Begin Forwarded Message -------------
2229#
2230# I finally got my hands on the Official Presidential Decree that sets up the
2231# rules for the DST changes. The rules are:
2232#
2233# 1. The country is divided in 3 timezones:
2234#    - Baja California Norte (the Mexico/BajaNorte TZ)
2235#    - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)
2236#    - The rest of the country (the Mexico/General TZ)
2237#
2238# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October
2239#    at 2:00 AM, the times in each zone are as follows:
2240#    BajaNorte: GMT+7
2241#    BajaSur:   GMT+6
2242#    General:   GMT+5
2243#
2244# 3. The rest of the year, the times are as follows:
2245#    BajaNorte: GMT+8
2246#    BajaSur:   GMT+7
2247#    General:   GMT+6
2248#
2249# The Decree was published in Mexico's Official Newspaper on January 4th.
2250#
2251# -------------- End Forwarded Message --------------
2252# From Paul Eggert (1996-06-12):
2253# For an English translation of the decree, see
2254# "Diario Oficial: Time Zone Changeover" (1996-01-04).
2255# http://mexico-travel.com/extra/timezone_eng.html
2256
2257# From Rives McDow (1998-10-08):
2258# The State of Quintana Roo has reverted back to central STD and DST times
2259# (i.e. UTC -0600 and -0500 as of 1998-08-02).
2260
2261# From Rives McDow (2000-01-10):
2262# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time
2263# zone 5 hours from the International Date Line, and will not observe daylight
2264# savings time so as to stay on the same time zone as the southern part of
2265# Arizona year round.
2266
2267# From Jesper Nørgaard, translating
2268# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):
2269# In Oaxaca, the 55.000 teachers from the Section 22 of the National
2270# Syndicate of Education Workers, refuse to apply daylight saving each
2271# year, so that the more than 10,000 schools work at normal hour the
2272# whole year.
2273
2274# From Gwillim Law (2001-01-19):
2275# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says
2276# (translated):...
2277# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced
2278# that Summer Time will be reduced from seven to five months, starting
2279# this year....
2280# http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001
2281# [translated], says "summer time will ... take effect on the first Sunday
2282# in May, and end on the last Sunday of September.
2283
2284# From Arthur David Olson (2001-01-25):
2285# The 2001-01-24 traditional Washington Post contained the page one
2286# story "Timely Issue Divides Mexicans."...
2287# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
2288# ... Mexico City Mayor López Obrador "...is threatening to keep
2289# Mexico City and its 20 million residents on a different time than
2290# the rest of the country..." In particular, López Obrador would abolish
2291# observation of Daylight Saving Time.
2292
2293# Official statute published by the Energy Department
2294# http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre
2295# (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
2296# and Sonora with no DST.  This was reported by Jesper Nørgaard (2001-02-03).
2297
2298# From Paul Eggert (2001-03-03):
2299#
2300# http://www.latimes.com/news/nation/20010303/t000018766.html
2301# James F. Smith writes in today's LA Times
2302# * Sonora will continue to observe standard time.
2303# * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that
2304#   the Federal District will not adopt DST.
2305# * 4 of 16 district leaders announced they'll ignore the decree.
2306# * The decree does not affect federal-controlled facilities including
2307#   the airport, banks, hospitals, and schools.
2308#
2309# For now we'll assume that the Federal District will bow to federal rules.
2310
2311# From Jesper Nørgaard (2001-04-01):
2312# I found some references to the Mexican application of daylight
2313# saving, which modifies what I had already sent you, stating earlier
2314# that a number of northern Mexican states would go on daylight
2315# saving. The modification reverts this to only cover Baja California
2316# (Norte), while all other states (except Sonora, who has no daylight
2317# saving all year) will follow the original decree of president
2318# Vicente Fox, starting daylight saving May 6, 2001 and ending
2319# September 30, 2001.
2320# References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp>
2321# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)
2322
2323# From Reuters (2001-09-04):
2324# Mexico's Supreme Court on Tuesday declared that daylight savings was
2325# unconstitutional in Mexico City, creating the possibility the
2326# capital will be in a different time zone from the rest of the nation
2327# next year....  The Supreme Court's ruling takes effect at 2:00
2328# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to
2329# standard time. "This is so residents of the Federal District are not
2330# subject to unexpected time changes," a statement from the court said.
2331
2332# From Jesper Nørgaard Welen (2002-03-12):
2333# ... consulting my local grocery store(!) and my coworkers, they all insisted
2334# that a new decision had been made to reinstate US style DST in Mexico....
2335# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20)
2336# confirms this.  Sonora as usual is the only state where DST is not applied.
2337
2338# From Steffen Thorsen (2009-12-28):
2339#
2340# Steffen Thorsen wrote:
2341# > Mexico's House of Representatives has approved a proposal for northern
2342# > Mexico's border cities to share the same daylight saving schedule as
2343# > the United States.
2344# Now this has passed both the Congress and the Senate, so starting from
2345# 2010, some border regions will be the same:
2346# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/
2347# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939
2348# (Spanish)
2349#
2350# Could not find the new law text, but the proposed law text changes are here:
2351# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf
2352# (Gaceta Parlamentaria)
2353#
2354# There is also a list of the votes here:
2355# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html
2356#
2357# Our page:
2358# http://www.timeanddate.com/news/time/north-mexico-dst-change.html
2359
2360# From Arthur David Olson (2010-01-20):
2361# The page
2362# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
2363# includes this text:
2364# En los municipios fronterizos de Tijuana y Mexicali en Baja California;
2365# Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila;
2366# Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en
2367# Tamaulipas, la aplicación de este horario estacional surtirá efecto
2368# desde las dos horas del segundo domingo de marzo y concluirá a las dos
2369# horas del primer domingo de noviembre.
2370# En los municipios fronterizos que se encuentren ubicados en la franja
2371# fronteriza norte en el territorio comprendido entre la línea
2372# internacional y la línea paralela ubicada a una distancia de veinte
2373# kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el
2374# interior del país, la aplicación de este horario estacional surtirá
2375# efecto desde las dos horas del segundo domingo de marzo y concluirá a
2376# las dos horas del primer domingo de noviembre.
2377
2378# From Steffen Thorsen (2014-12-08), translated by Gwillim Law:
2379# The Mexican state of Quintana Roo will likely change to EST in 2015.
2380#
2381# http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo
2382# "With this change, the time conflict that has existed between the municipios
2383# of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an
2384# end. The latter declared itself in rebellion 15 years ago when a time change
2385# was initiated in Mexico, and since then it has refused to change its time
2386# zone along with the rest of the country."
2387#
2388# From Steffen Thorsen (2015-01-14), translated by Gwillim Law:
2389# http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html
2390# "...the new time zone will come into effect at two o'clock on the first Sunday
2391# of February, when we will have to advance the clock one hour from its current
2392# time..."
2393# Also, the new zone will not use DST.
2394#
2395# From Carlos Raúl Perasso (2015-02-02):
2396# The decree that modifies the Mexican Hour System Law has finally
2397# been published at the Diario Oficial de la Federación
2398# http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015
2399# It establishes 5 zones for Mexico:
2400# 1- Zona Centro (Central Zone): Corresponds to longitude 90 W,
2401#    includes most of Mexico, excluding what's mentioned below.
2402# 2- Zona Pacífico (Pacific Zone): Longitude 105 W, includes the
2403#    states of Baja California Sur; Chihuahua; Nayarit (excluding Bahía
2404#    de Banderas which lies in Central Zone); Sinaloa and Sonora.
2405# 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the
2406#    state of Baja California.
2407# 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state
2408#    of Quintana Roo.
2409# 5- The islands, reefs and keys shall take their timezone from the
2410#    longitude they are located at.
2411
2412# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2413Rule	Mexico	1939	only	-	Feb	5	0:00	1:00	D
2414Rule	Mexico	1939	only	-	Jun	25	0:00	0	S
2415Rule	Mexico	1940	only	-	Dec	9	0:00	1:00	D
2416Rule	Mexico	1941	only	-	Apr	1	0:00	0	S
2417Rule	Mexico	1943	only	-	Dec	16	0:00	1:00	W # War
2418Rule	Mexico	1944	only	-	May	1	0:00	0	S
2419Rule	Mexico	1950	only	-	Feb	12	0:00	1:00	D
2420Rule	Mexico	1950	only	-	Jul	30	0:00	0	S
2421Rule	Mexico	1996	2000	-	Apr	Sun>=1	2:00	1:00	D
2422Rule	Mexico	1996	2000	-	Oct	lastSun	2:00	0	S
2423Rule	Mexico	2001	only	-	May	Sun>=1	2:00	1:00	D
2424Rule	Mexico	2001	only	-	Sep	lastSun	2:00	0	S
2425Rule	Mexico	2002	max	-	Apr	Sun>=1	2:00	1:00	D
2426Rule	Mexico	2002	max	-	Oct	lastSun	2:00	0	S
2427# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2428# Quintana Roo; represented by Cancún
2429Zone America/Cancun	-5:47:04 -	LMT	1922 Jan  1  0:12:56
2430			-6:00	-	CST	1981 Dec 23
2431			-5:00	Mexico	E%sT	1998 Aug  2  2:00
2432			-6:00	Mexico	C%sT	2015 Feb  1  2:00
2433			-5:00	-	EST
2434# Campeche, Yucatán; represented by Mérida
2435Zone America/Merida	-5:58:28 -	LMT	1922 Jan  1  0:01:32
2436			-6:00	-	CST	1981 Dec 23
2437			-5:00	-	EST	1982 Dec  2
2438			-6:00	Mexico	C%sT
2439# Coahuila, Durango, Nuevo León, Tamaulipas (near US border)
2440Zone America/Matamoros	-6:40:00 -	LMT	1921 Dec 31 23:20:00
2441			-6:00	-	CST	1988
2442			-6:00	US	C%sT	1989
2443			-6:00	Mexico	C%sT	2010
2444			-6:00	US	C%sT
2445# Coahuila, Durango, Nuevo León, Tamaulipas (away from US border)
2446Zone America/Monterrey	-6:41:16 -	LMT	1921 Dec 31 23:18:44
2447			-6:00	-	CST	1988
2448			-6:00	US	C%sT	1989
2449			-6:00	Mexico	C%sT
2450# Central Mexico
2451Zone America/Mexico_City -6:36:36 -	LMT	1922 Jan  1  0:23:24
2452			-7:00	-	MST	1927 Jun 10 23:00
2453			-6:00	-	CST	1930 Nov 15
2454			-7:00	-	MST	1931 May  1 23:00
2455			-6:00	-	CST	1931 Oct
2456			-7:00	-	MST	1932 Apr  1
2457			-6:00	Mexico	C%sT	2001 Sep 30  2:00
2458			-6:00	-	CST	2002 Feb 20
2459			-6:00	Mexico	C%sT
2460# Chihuahua (near US border)
2461Zone America/Ojinaga	-6:57:40 -	LMT	1922 Jan  1  0:02:20
2462			-7:00	-	MST	1927 Jun 10 23:00
2463			-6:00	-	CST	1930 Nov 15
2464			-7:00	-	MST	1931 May  1 23:00
2465			-6:00	-	CST	1931 Oct
2466			-7:00	-	MST	1932 Apr  1
2467			-6:00	-	CST	1996
2468			-6:00	Mexico	C%sT	1998
2469			-6:00	-	CST	1998 Apr Sun>=1  3:00
2470			-7:00	Mexico	M%sT	2010
2471			-7:00	US	M%sT
2472# Chihuahua (away from US border)
2473Zone America/Chihuahua	-7:04:20 -	LMT	1921 Dec 31 23:55:40
2474			-7:00	-	MST	1927 Jun 10 23:00
2475			-6:00	-	CST	1930 Nov 15
2476			-7:00	-	MST	1931 May  1 23:00
2477			-6:00	-	CST	1931 Oct
2478			-7:00	-	MST	1932 Apr  1
2479			-6:00	-	CST	1996
2480			-6:00	Mexico	C%sT	1998
2481			-6:00	-	CST	1998 Apr Sun>=1  3:00
2482			-7:00	Mexico	M%sT
2483# Sonora
2484Zone America/Hermosillo	-7:23:52 -	LMT	1921 Dec 31 23:36:08
2485			-7:00	-	MST	1927 Jun 10 23:00
2486			-6:00	-	CST	1930 Nov 15
2487			-7:00	-	MST	1931 May  1 23:00
2488			-6:00	-	CST	1931 Oct
2489			-7:00	-	MST	1932 Apr  1
2490			-6:00	-	CST	1942 Apr 24
2491			-7:00	-	MST	1949 Jan 14
2492			-8:00	-	PST	1970
2493			-7:00	Mexico	M%sT	1999
2494			-7:00	-	MST
2495
2496# From Alexander Krivenyshev (2010-04-21):
2497# According to news, Bahía de Banderas (Mexican state of Nayarit)
2498# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to
2499# share the same time zone as nearby city Puerto Vallarta, Jalisco).
2500#
2501# (Spanish)
2502# Bahía de Banderas homologa su horario al del centro del
2503# país, a partir de este domingo
2504# http://www.nayarit.gob.mx/notes.asp?id=20748
2505#
2506# Bahía de Banderas homologa su horario con el del Centro del
2507# País
2508# 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
2509#
2510# (English)
2511# Puerto Vallarta and Bahía de Banderas: One Time Zone
2512# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml
2513# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html
2514#
2515# "Mexico's Senate approved the amendments to the Mexican Schedule System that
2516# will allow Bahía de Banderas and Puerto Vallarta to share the same time
2517# zone ..."
2518# Baja California Sur, Nayarit, Sinaloa
2519
2520# From Arthur David Olson (2010-05-01):
2521# Use "Bahia_Banderas" to keep the name to fourteen characters.
2522
2523# Mazatlán
2524Zone America/Mazatlan	-7:05:40 -	LMT	1921 Dec 31 23:54:20
2525			-7:00	-	MST	1927 Jun 10 23:00
2526			-6:00	-	CST	1930 Nov 15
2527			-7:00	-	MST	1931 May  1 23:00
2528			-6:00	-	CST	1931 Oct
2529			-7:00	-	MST	1932 Apr  1
2530			-6:00	-	CST	1942 Apr 24
2531			-7:00	-	MST	1949 Jan 14
2532			-8:00	-	PST	1970
2533			-7:00	Mexico	M%sT
2534
2535# Bahía de Banderas
2536Zone America/Bahia_Banderas	-7:01:00 -	LMT	1921 Dec 31 23:59:00
2537			-7:00	-	MST	1927 Jun 10 23:00
2538			-6:00	-	CST	1930 Nov 15
2539			-7:00	-	MST	1931 May  1 23:00
2540			-6:00	-	CST	1931 Oct
2541			-7:00	-	MST	1932 Apr  1
2542			-6:00	-	CST	1942 Apr 24
2543			-7:00	-	MST	1949 Jan 14
2544			-8:00	-	PST	1970
2545			-7:00	Mexico	M%sT	2010 Apr  4  2:00
2546			-6:00	Mexico	C%sT
2547
2548# Baja California (near US border)
2549Zone America/Tijuana	-7:48:04 -	LMT	1922 Jan  1  0:11:56
2550			-7:00	-	MST	1924
2551			-8:00	-	PST	1927 Jun 10 23:00
2552			-7:00	-	MST	1930 Nov 15
2553			-8:00	-	PST	1931 Apr  1
2554			-8:00	1:00	PDT	1931 Sep 30
2555			-8:00	-	PST	1942 Apr 24
2556			-8:00	1:00	PWT	1945 Aug 14 23:00u
2557			-8:00	1:00	PPT	1945 Nov 12 # Peace
2558			-8:00	-	PST	1948 Apr  5
2559			-8:00	1:00	PDT	1949 Jan 14
2560			-8:00	-	PST	1954
2561			-8:00	CA	P%sT	1961
2562			-8:00	-	PST	1976
2563			-8:00	US	P%sT	1996
2564			-8:00	Mexico	P%sT	2001
2565			-8:00	US	P%sT	2002 Feb 20
2566			-8:00	Mexico	P%sT	2010
2567			-8:00	US	P%sT
2568# Baja California (away from US border)
2569Zone America/Santa_Isabel	-7:39:28 -	LMT	1922 Jan  1  0:20:32
2570			-7:00	-	MST	1924
2571			-8:00	-	PST	1927 Jun 10 23:00
2572			-7:00	-	MST	1930 Nov 15
2573			-8:00	-	PST	1931 Apr  1
2574			-8:00	1:00	PDT	1931 Sep 30
2575			-8:00	-	PST	1942 Apr 24
2576			-8:00	1:00	PWT	1945 Aug 14 23:00u
2577			-8:00	1:00	PPT	1945 Nov 12 # Peace
2578			-8:00	-	PST	1948 Apr  5
2579			-8:00	1:00	PDT	1949 Jan 14
2580			-8:00	-	PST	1954
2581			-8:00	CA	P%sT	1961
2582			-8:00	-	PST	1976
2583			-8:00	US	P%sT	1996
2584			-8:00	Mexico	P%sT	2001
2585			-8:00	US	P%sT	2002 Feb 20
2586			-8:00	Mexico	P%sT
2587# From Paul Eggert (2006-03-22):
2588# Formerly there was an America/Ensenada zone, which differed from
2589# America/Tijuana only in that it did not observe DST from 1976
2590# through 1995.  This was as per Shanks (1999).  But Shanks & Pottenger say
2591# Ensenada did not observe DST from 1948 through 1975.  Guy Harris reports
2592# that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and
2593# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that
2594# DST-observance was a town-by-town matter back then.  This concerns
2595# data after 1970 so most likely there should be at least one Zone
2596# other than America/Tijuana for Baja, but it's not clear yet what its
2597# name or contents should be.
2598#
2599# Revillagigedo Is
2600# no information
2601
2602###############################################################################
2603
2604# Anguilla
2605# Antigua and Barbuda
2606# See America/Port_of_Spain.
2607
2608# Bahamas
2609#
2610# For 1899 Milne gives -5:09:29.5; round that.
2611#
2612# From Sue Williams (2006-12-07):
2613# The Bahamas announced about a month ago that they plan to change their DST
2614# rules to sync with the U.S. starting in 2007....
2615# http://www.jonesbahamas.com/?c=45&a=10412
2616
2617# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2618Rule	Bahamas	1964	1975	-	Oct	lastSun	2:00	0	S
2619Rule	Bahamas	1964	1975	-	Apr	lastSun	2:00	1:00	D
2620# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2621Zone	America/Nassau	-5:09:30 -	LMT	1912 Mar 2
2622			-5:00	Bahamas	E%sT	1976
2623			-5:00	US	E%sT
2624
2625# Barbados
2626
2627# For 1899 Milne gives -3:58:29.2; round that.
2628
2629# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2630Rule	Barb	1977	only	-	Jun	12	2:00	1:00	D
2631Rule	Barb	1977	1978	-	Oct	Sun>=1	2:00	0	S
2632Rule	Barb	1978	1980	-	Apr	Sun>=15	2:00	1:00	D
2633Rule	Barb	1979	only	-	Sep	30	2:00	0	S
2634Rule	Barb	1980	only	-	Sep	25	2:00	0	S
2635# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2636Zone America/Barbados	-3:58:29 -	LMT	1924 # Bridgetown
2637			-3:58:29 -	BMT	1932 # Bridgetown Mean Time
2638			-4:00	Barb	A%sT
2639
2640# Belize
2641# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.
2642# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2643Rule	Belize	1918	1942	-	Oct	Sun>=2	0:00	0:30	HD
2644Rule	Belize	1919	1943	-	Feb	Sun>=9	0:00	0	S
2645Rule	Belize	1973	only	-	Dec	 5	0:00	1:00	D
2646Rule	Belize	1974	only	-	Feb	 9	0:00	0	S
2647Rule	Belize	1982	only	-	Dec	18	0:00	1:00	D
2648Rule	Belize	1983	only	-	Feb	12	0:00	0	S
2649# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2650Zone	America/Belize	-5:52:48 -	LMT	1912 Apr
2651			-6:00	Belize	C%sT
2652
2653# Bermuda
2654
2655# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower,
2656# Bermuda dockyard, Ireland I; round that.
2657
2658# From Dan Jones, reporting in The Royal Gazette (2006-06-26):
2659
2660# Next year, however, clocks in the US will go forward on the second Sunday
2661# in March, until the first Sunday in November.  And, after the Time Zone
2662# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
2663# Friday, the same thing will happen in Bermuda.
2664# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135
2665
2666# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2667Zone Atlantic/Bermuda	-4:19:18 -	LMT	1930 Jan  1  2:00 # Hamilton
2668			-4:00	-	AST	1974 Apr 28  2:00
2669			-4:00	Canada	A%sT	1976
2670			-4:00	US	A%sT
2671
2672# Cayman Is
2673
2674# From Paul Eggert (2015-05-15):
2675# The Cayman government has decided to introduce DST in 2016, the idea being
2676# to keep in sync with New York.  The legislation hasn't passed but the change
2677# seems quite likely.  See: Meade B. Cayman 27.
2678# http://www.cayman27.com.ky/2015/05/15/clock-ticks-toward-daylight-saving-time-in-cayman
2679
2680Zone	America/Cayman	-5:25:32 -	LMT	1890     # Georgetown
2681			-5:07:11 -	KMT	1912 Feb # Kingston Mean Time
2682			-5:00	-	EST	2016
2683			-5:00	US	E%sT
2684
2685# Costa Rica
2686
2687# Milne gives -5:36:13.3 as San José mean time; round to nearest.
2688
2689# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2690Rule	CR	1979	1980	-	Feb	lastSun	0:00	1:00	D
2691Rule	CR	1979	1980	-	Jun	Sun>=1	0:00	0	S
2692Rule	CR	1991	1992	-	Jan	Sat>=15	0:00	1:00	D
2693# IATA SSIM (1991-09) says the following was at 1:00;
2694# go with Shanks & Pottenger.
2695Rule	CR	1991	only	-	Jul	 1	0:00	0	S
2696Rule	CR	1992	only	-	Mar	15	0:00	0	S
2697# There are too many San Josés elsewhere, so we'll use 'Costa Rica'.
2698# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2699Zone America/Costa_Rica	-5:36:13 -	LMT	1890        # San José
2700			-5:36:13 -	SJMT	1921 Jan 15 # San José Mean Time
2701			-6:00	CR	C%sT
2702# Coco
2703# no information; probably like America/Costa_Rica
2704
2705# Cuba
2706
2707# From Paul Eggert (2013-02-21):
2708# Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57
2709# for the port, and -5:30 for meteorological observations.
2710# For now, stick with Shanks & Pottenger.
2711
2712# From Arthur David Olson (1999-03-29):
2713# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
2714# the Cuban National Team and the Baltimore Orioles was carried live on
2715# the Orioles Radio Network, including affiliate WTOP in Washington, DC.
2716# During the game, play-by-play announcer Jim Hunter noted that
2717# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
2718# Time today."  (The "two hour" remark referred to losing one hour of
2719# sleep on 1999-03-28 - when the announcers were in Cuba as it switched
2720# to DST - and one more hour on 1999-04-04 - when the announcers will have
2721# returned to Baltimore, which switches on that date.)
2722
2723# From Steffen Thorsen (2013-11-11):
2724# DST start in Cuba in 2004 ... does not follow the same rules as the
2725# years before.  The correct date should be Sunday 2004-03-28 00:00 ...
2726# https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html
2727
2728# From Evert van der Veer via Steffen Thorsen (2004-10-28):
2729# Cuba is not going back to standard time this year.
2730# From Paul Eggert (2006-03-22):
2731# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html
2732# says that it's due to a problem at the Antonio Guiteras
2733# thermoelectric plant, and says "This October there will be no return
2734# to normal hours (after daylight saving time)".
2735# For now, let's assume that it's a temporary measure.
2736
2737# From Carlos A. Carnero Delgado (2005-11-12):
2738# This year (just like in 2004-2005) there's no change in time zone
2739# adjustment in Cuba.  We will stay in daylight saving time:
2740# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html
2741
2742# From Jesper Nørgaard Welen (2006-10-21):
2743# An article in GRANMA INTERNACIONAL claims that Cuba will end
2744# the 3 years of permanent DST next weekend, see
2745# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html
2746# "On Saturday night, October 28 going into Sunday, October 29, at 01:00,
2747# watches should be set back one hour - going back to 00:00 hours - returning
2748# to the normal schedule....
2749
2750# From Paul Eggert (2007-03-02):
2751# <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday,
2752# says Cuban clocks will advance at midnight on March 10.
2753# For lack of better information, assume Cuba will use US rules,
2754# except that it switches at midnight standard time as usual.
2755#
2756# From Steffen Thorsen (2007-10-25):
2757# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week
2758# earlier - on the last Sunday of October, just like in 2006.
2759#
2760# He supplied these references:
2761#
2762# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES
2763# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm
2764#
2765# From Alex Krivenyshev (2007-10-25):
2766# Here is also article from Granma (Cuba):
2767#
2768# Regirá el Horario Normal desde el próximo domingo 28 de octubre
2769# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html
2770#
2771# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html
2772
2773# From Arthur David Olson (2008-03-09):
2774# I'm in Maryland which is now observing United States Eastern Daylight
2775# Time. At 9:44 local time I used RealPlayer to listen to
2776# http://media.enet.cu/radioreloj
2777# a Cuban information station, and heard
2778# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"),
2779# indicating that Cuba is still on standard time.
2780
2781# From Steffen Thorsen (2008-03-12):
2782# It seems that Cuba will start DST on Sunday, 2007-03-16...
2783# It was announced yesterday, according to this source (in Spanish):
2784# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm
2785#
2786# Some more background information is posted here:
2787# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html
2788#
2789# The article also says that Cuba has been observing DST since 1963,
2790# while Shanks (and tzdata) has 1965 as the first date (except in the
2791# 1940's). Many other web pages in Cuba also claim that it has been
2792# observed since 1963, but with the exception of 1970 - an exception
2793# which is not present in tzdata/Shanks. So there is a chance we need to
2794# change some historic records as well.
2795#
2796# One example:
2797# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm
2798
2799# From Jesper Nørgaard Welen (2008-03-13):
2800# The Cuban time change has just been confirmed on the most authoritative
2801# web site, the Granma.  Please check out
2802# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html
2803#
2804# Basically as expected after Steffen Thorsen's information, the change
2805# will take place midnight between Saturday and Sunday.
2806
2807# From Arthur David Olson (2008-03-12):
2808# Assume Sun>=15 (third Sunday) going forward.
2809
2810# From Alexander Krivenyshev (2009-03-04)
2811# According to the Radio Reloj - Cuba will start Daylight Saving Time on
2812# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009-
2813# not on midnight March 14 / March 15 as previously thought.
2814#
2815# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html
2816# (in Spanish)
2817
2818# From Arthur David Olson (2009-03-09)
2819# I listened over the Internet to
2820# http://media.enet.cu/readioreloj
2821# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the
2822# the time was announced as "diez cinco" - the same time as here, indicating
2823# that has indeed switched to DST. Assume second Sunday from 2009 forward.
2824
2825# From Steffen Thorsen (2011-03-08):
2826# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00
2827# this year. Nothing about the end date known so far (if that has
2828# changed at all).
2829#
2830# Source:
2831# http://granma.co.cu/2011/03/08/nacional/artic01.html
2832#
2833# Our info:
2834# http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html
2835#
2836# From Steffen Thorsen (2011-10-30)
2837# Cuba will end DST two weeks later this year. Instead of going back
2838# tonight, it has been delayed to 2011-11-13 at 01:00.
2839#
2840# One source (Spanish)
2841# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html
2842#
2843# Our page:
2844# http://www.timeanddate.com/news/time/cuba-time-changes-2011.html
2845#
2846# From Steffen Thorsen (2012-03-01)
2847# According to Radio Reloj, Cuba will start DST on Midnight between March
2848# 31 and April 1.
2849#
2850# Radio Reloj has the following info (Spanish):
2851# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril
2852#
2853# Our info on it:
2854# http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html
2855
2856# From Steffen Thorsen (2012-11-03):
2857# Radio Reloj and many other sources report that Cuba is changing back
2858# to standard time on 2012-11-04:
2859# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre
2860# From Paul Eggert (2012-11-03):
2861# For now, assume the future rule is first Sunday in November.
2862
2863# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2864Rule	Cuba	1928	only	-	Jun	10	0:00	1:00	D
2865Rule	Cuba	1928	only	-	Oct	10	0:00	0	S
2866Rule	Cuba	1940	1942	-	Jun	Sun>=1	0:00	1:00	D
2867Rule	Cuba	1940	1942	-	Sep	Sun>=1	0:00	0	S
2868Rule	Cuba	1945	1946	-	Jun	Sun>=1	0:00	1:00	D
2869Rule	Cuba	1945	1946	-	Sep	Sun>=1	0:00	0	S
2870Rule	Cuba	1965	only	-	Jun	1	0:00	1:00	D
2871Rule	Cuba	1965	only	-	Sep	30	0:00	0	S
2872Rule	Cuba	1966	only	-	May	29	0:00	1:00	D
2873Rule	Cuba	1966	only	-	Oct	2	0:00	0	S
2874Rule	Cuba	1967	only	-	Apr	8	0:00	1:00	D
2875Rule	Cuba	1967	1968	-	Sep	Sun>=8	0:00	0	S
2876Rule	Cuba	1968	only	-	Apr	14	0:00	1:00	D
2877Rule	Cuba	1969	1977	-	Apr	lastSun	0:00	1:00	D
2878Rule	Cuba	1969	1971	-	Oct	lastSun	0:00	0	S
2879Rule	Cuba	1972	1974	-	Oct	8	0:00	0	S
2880Rule	Cuba	1975	1977	-	Oct	lastSun	0:00	0	S
2881Rule	Cuba	1978	only	-	May	7	0:00	1:00	D
2882Rule	Cuba	1978	1990	-	Oct	Sun>=8	0:00	0	S
2883Rule	Cuba	1979	1980	-	Mar	Sun>=15	0:00	1:00	D
2884Rule	Cuba	1981	1985	-	May	Sun>=5	0:00	1:00	D
2885Rule	Cuba	1986	1989	-	Mar	Sun>=14	0:00	1:00	D
2886Rule	Cuba	1990	1997	-	Apr	Sun>=1	0:00	1:00	D
2887Rule	Cuba	1991	1995	-	Oct	Sun>=8	0:00s	0	S
2888Rule	Cuba	1996	only	-	Oct	 6	0:00s	0	S
2889Rule	Cuba	1997	only	-	Oct	12	0:00s	0	S
2890Rule	Cuba	1998	1999	-	Mar	lastSun	0:00s	1:00	D
2891Rule	Cuba	1998	2003	-	Oct	lastSun	0:00s	0	S
2892Rule	Cuba	2000	2003	-	Apr	Sun>=1	0:00s	1:00	D
2893Rule	Cuba	2004	only	-	Mar	lastSun	0:00s	1:00	D
2894Rule	Cuba	2006	2010	-	Oct	lastSun	0:00s	0	S
2895Rule	Cuba	2007	only	-	Mar	Sun>=8	0:00s	1:00	D
2896Rule	Cuba	2008	only	-	Mar	Sun>=15	0:00s	1:00	D
2897Rule	Cuba	2009	2010	-	Mar	Sun>=8	0:00s	1:00	D
2898Rule	Cuba	2011	only	-	Mar	Sun>=15	0:00s	1:00	D
2899Rule	Cuba	2011	only	-	Nov	13	0:00s	0	S
2900Rule	Cuba	2012	only	-	Apr	1	0:00s	1:00	D
2901Rule	Cuba	2012	max	-	Nov	Sun>=1	0:00s	0	S
2902Rule	Cuba	2013	max	-	Mar	Sun>=8	0:00s	1:00	D
2903
2904# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2905Zone	America/Havana	-5:29:28 -	LMT	1890
2906			-5:29:36 -	HMT	1925 Jul 19 12:00 # Havana MT
2907			-5:00	Cuba	C%sT
2908
2909# Dominica
2910# See America/Port_of_Spain.
2911
2912# Dominican Republic
2913
2914# From Steffen Thorsen (2000-10-30):
2915# Enrique Morales reported to me that the Dominican Republic has changed the
2916# time zone to Eastern Standard Time as of Sunday 29 at 2 am....
2917# http://www.listin.com.do/antes/261000/republica/princi.html
2918
2919# From Paul Eggert (2000-12-04):
2920# That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
2921
2922# From Rives McDow (2000-12-01):
2923# Dominican Republic changed its mind and presidential decree on Tuesday,
2924# November 28, 2000, with a new decree.  On Sunday, December 3 at 1:00 AM the
2925# Dominican Republic will be reverting to 8 hours from the International Date
2926# Line, and will not be using DST in the foreseeable future.  The reason they
2927# decided to use DST was to be in synch with Puerto Rico, who was also going
2928# to implement DST.  When Puerto Rico didn't implement DST, the president
2929# decided to revert.
2930
2931
2932# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2933Rule	DR	1966	only	-	Oct	30	0:00	1:00	D
2934Rule	DR	1967	only	-	Feb	28	0:00	0	S
2935Rule	DR	1969	1973	-	Oct	lastSun	0:00	0:30	HD
2936Rule	DR	1970	only	-	Feb	21	0:00	0	S
2937Rule	DR	1971	only	-	Jan	20	0:00	0	S
2938Rule	DR	1972	1974	-	Jan	21	0:00	0	S
2939# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2940Zone America/Santo_Domingo -4:39:36 -	LMT	1890
2941			-4:40	-	SDMT	1933 Apr  1 12:00 # S. Dom. MT
2942			-5:00	DR	E%sT	1974 Oct 27
2943			-4:00	-	AST	2000 Oct 29  2:00
2944			-5:00	US	E%sT	2000 Dec  3  1:00
2945			-4:00	-	AST
2946
2947# El Salvador
2948
2949# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2950Rule	Salv	1987	1988	-	May	Sun>=1	0:00	1:00	D
2951Rule	Salv	1987	1988	-	Sep	lastSun	0:00	0	S
2952# There are too many San Salvadors elsewhere, so use America/El_Salvador
2953# instead of America/San_Salvador.
2954# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2955Zone America/El_Salvador -5:56:48 -	LMT	1921 # San Salvador
2956			-6:00	Salv	C%sT
2957
2958# Grenada
2959# Guadeloupe
2960# St Barthélemy
2961# St Martin (French part)
2962# See America/Port_of_Spain.
2963
2964# Guatemala
2965#
2966# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
2967# Diario Co Latino, at
2968# <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>,
2969# says in an article dated 2006-04-19 that the Guatemalan government had
2970# decided on that date to advance official time by 60 minutes, to lessen the
2971# impact of the elevated cost of oil....  Daylight saving time will last from
2972# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
2973# From Paul Eggert (2006-06-22):
2974# The Ministry of Energy and Mines, press release CP-15/2006
2975# (2006-04-19), says DST ends at 24:00.  See
2976# http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf
2977
2978# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2979Rule	Guat	1973	only	-	Nov	25	0:00	1:00	D
2980Rule	Guat	1974	only	-	Feb	24	0:00	0	S
2981Rule	Guat	1983	only	-	May	21	0:00	1:00	D
2982Rule	Guat	1983	only	-	Sep	22	0:00	0	S
2983Rule	Guat	1991	only	-	Mar	23	0:00	1:00	D
2984Rule	Guat	1991	only	-	Sep	 7	0:00	0	S
2985Rule	Guat	2006	only	-	Apr	30	0:00	1:00	D
2986Rule	Guat	2006	only	-	Oct	 1	0:00	0	S
2987# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2988Zone America/Guatemala	-6:02:04 -	LMT	1918 Oct 5
2989			-6:00	Guat	C%sT
2990
2991# Haiti
2992# From Gwillim Law (2005-04-15):
2993# Risto O. Nykänen wrote me that Haiti is now on DST.
2994# I searched for confirmation, and I found a press release
2995# on the Web page of the Haitian Consulate in Chicago (2005-03-31),
2996# <http://www.haitianconsulate.org/time.doc>.  Translated from French, it says:
2997#
2998#  "The Prime Minister's Communication Office notifies the public in general
2999#   and the press in particular that, following a decision of the Interior
3000#   Ministry and the Territorial Collectivities [I suppose that means the
3001#   provinces], Haiti will move to Eastern Daylight Time in the night from next
3002#   Saturday the 2nd to Sunday the 3rd.
3003#
3004#  "Consequently, the Prime Minister's Communication Office wishes to inform
3005#   the population that the country's clocks will be set forward one hour
3006#   starting at midnight.  This provision will hold until the last Saturday in
3007#   October 2005.
3008#
3009#  "Port-au-Prince, March 31, 2005"
3010#
3011# From Steffen Thorsen (2006-04-04):
3012# I have been informed by users that Haiti observes DST this year like
3013# last year, so the current "only" rule for 2005 might be changed to a
3014# "max" rule or to last until 2006. (Who knows if they will observe DST
3015# next year or if they will extend their DST like US/Canada next year).
3016#
3017# I have found this article about it (in French):
3018# http://www.haitipressnetwork.com/news.cfm?articleID=7612
3019#
3020# The reason seems to be an energy crisis.
3021
3022# From Stephen Colebourne (2007-02-22):
3023# Some IATA info: Haiti won't be having DST in 2007.
3024
3025# From Steffen Thorsen (2012-03-11):
3026# According to several news sources, Haiti will observe DST this year,
3027# apparently using the same start and end date as USA/Canada.
3028# So this means they have already changed their time.
3029#
3030# http://www.alterpresse.org/spip.php?article12510
3031# http://radiovision2000haiti.net/home/?p=13253
3032#
3033# From Arthur David Olson (2012-03-11):
3034# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to
3035# 3:00 a.m. rather than the traditional Haitian jump at midnight.
3036# Assume a US-style fall back as well.
3037
3038# From Steffen Thorsen (2013-03-10):
3039# It appears that Haiti is observing DST this year as well, same rules
3040# as US/Canada.  They did it last year as well, and it looks like they
3041# are going to observe DST every year now...
3042#
3043# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/
3044# http://www.canalplushaiti.net/?p=6714
3045
3046# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
3047Rule	Haiti	1983	only	-	May	8	0:00	1:00	D
3048Rule	Haiti	1984	1987	-	Apr	lastSun	0:00	1:00	D
3049Rule	Haiti	1983	1987	-	Oct	lastSun	0:00	0	S
3050# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
3051# Go with IATA.
3052Rule	Haiti	1988	1997	-	Apr	Sun>=1	1:00s	1:00	D
3053Rule	Haiti	1988	1997	-	Oct	lastSun	1:00s	0	S
3054Rule	Haiti	2005	2006	-	Apr	Sun>=1	0:00	1:00	D
3055Rule	Haiti	2005	2006	-	Oct	lastSun	0:00	0	S
3056Rule	Haiti	2012	max	-	Mar	Sun>=8	2:00	1:00	D
3057Rule	Haiti	2012	max	-	Nov	Sun>=1	2:00	0	S
3058# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3059Zone America/Port-au-Prince -4:49:20 -	LMT	1890
3060			-4:49	-	PPMT	1917 Jan 24 12:00 # P-a-P MT
3061			-5:00	Haiti	E%sT
3062
3063# Honduras
3064# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.
3065
3066# From Paul Eggert (2006-05-05):
3067# worldtimezone.com reports a 2006-05-02 Spanish-language AP article
3068# saying Honduras will start using DST midnight Saturday, effective 4
3069# months until September.  La Tribuna reported today
3070# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president
3071# of Honduras, refused to back down on this.
3072
3073# From Jesper Nørgaard Welen (2006-08-08):
3074# It seems that Honduras has returned from DST to standard time this Monday at
3075# 00:00 hours (prolonging Sunday to 25 hours duration).
3076# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html
3077
3078# From Paul Eggert (2006-08-08):
3079# Also see Diario El Heraldo, The country returns to standard time (2006-08-08).
3080# http://www.elheraldo.hn/nota.php?nid=54941&sec=12
3081# It mentions executive decree 18-2006.
3082
3083# From Steffen Thorsen (2006-08-17):
3084# Honduras will observe DST from 2007 to 2009, exact dates are not
3085# published, I have located this authoritative source:
3086# http://www.presidencia.gob.hn/noticia.aspx?nId=47
3087
3088# From Steffen Thorsen (2007-03-30):
3089# http://www.laprensahn.com/pais_nota.php?id04962=7386
3090# So it seems that Honduras will not enter DST this year....
3091
3092# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
3093Rule	Hond	1987	1988	-	May	Sun>=1	0:00	1:00	D
3094Rule	Hond	1987	1988	-	Sep	lastSun	0:00	0	S
3095Rule	Hond	2006	only	-	May	Sun>=1	0:00	1:00	D
3096Rule	Hond	2006	only	-	Aug	Mon>=1	0:00	0	S
3097# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3098Zone America/Tegucigalpa -5:48:52 -	LMT	1921 Apr
3099			-6:00	Hond	C%sT
3100#
3101# Great Swan I ceded by US to Honduras in 1972
3102
3103# Jamaica
3104# Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an
3105# unspecified official document, and says "This time is used throughout the
3106# island".  Go with Milne.  Round to the nearest second as required by zic.
3107#
3108# Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but
3109# Lance Neita writes that Prime Minister Michael Manley decreed it January 5.
3110# Assume Neita meant Jan 6 02:00, the same as the US.  Neita also writes that
3111# Manley's supporters associated this act with Manley's nickname "Joshua"
3112# (recall that in the Bible the sun stood still at Joshua's request),
3113# and with the Rod of Correction which Manley said he had received from
3114# Haile Selassie, Emperor of Ethiopia.  See:
3115# Neita L. The politician in all of us. Jamaica Observer 2014-09-20
3116# http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647
3117#
3118# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3119Zone	America/Jamaica	-5:07:11 -	LMT	1890        # Kingston
3120			-5:07:11 -	KMT	1912 Feb    # Kingston Mean Time
3121			-5:00	-	EST	1974
3122			-5:00	US	E%sT	1984
3123			-5:00	-	EST
3124
3125# Martinique
3126# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3127Zone America/Martinique	-4:04:20 -      LMT	1890        # Fort-de-France
3128			-4:04:20 -	FFMT	1911 May    # Fort-de-France MT
3129			-4:00	-	AST	1980 Apr  6
3130			-4:00	1:00	ADT	1980 Sep 28
3131			-4:00	-	AST
3132
3133# Montserrat
3134# See America/Port_of_Spain.
3135
3136# Nicaragua
3137#
3138# This uses Shanks & Pottenger for times before 2005.
3139#
3140# From Steffen Thorsen (2005-04-12):
3141# I've got reports from 8 different people that Nicaragua just started
3142# DST on Sunday 2005-04-10, in order to save energy because of
3143# expensive petroleum.  The exact end date for DST is not yet
3144# announced, only "September" but some sites also say "mid-September".
3145# Some background information is available on the President's official site:
3146# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm
3147# The Decree, no 23-2005 is available here:
3148# 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
3149#
3150# From Paul Eggert (2005-05-01):
3151# The decree doesn't say anything about daylight saving, but for now let's
3152# assume that it is daylight saving....
3153#
3154# From Gwillim Law (2005-04-21):
3155# The Associated Press story on the time change, which can be found at
3156# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html
3157# and elsewhere, says (fifth paragraph, translated from Spanish): "The last
3158# time that a change of clocks was applied to save energy was in the year 2000
3159# during the Arnoldo Alemán administration."...
3160# The northamerica file says that Nicaragua has been on UTC-6 continuously
3161# since December 1998.  I wasn't able to find any details of Nicaraguan time
3162# changes in 2000.  Perhaps a note could be added to the northamerica file, to
3163# the effect that we have indirect evidence that DST was observed in 2000.
3164#
3165# From Jesper Nørgaard Welen (2005-11-02):
3166# Nicaragua left DST the 2005-10-02 at 00:00 (local time).
3167# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm
3168# (2005-09-26)
3169#
3170# From Jesper Nørgaard Welen (2006-05-05):
3171# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410
3172# (my informal translation)
3173# By order of the president of the republic, Enrique Bolaños, Nicaragua
3174# advanced by sixty minutes their official time, yesterday at 2 in the
3175# morning, and will stay that way until 30th of September.
3176#
3177# From Jesper Nørgaard Welen (2006-09-30):
3178# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf
3179# My informal translation runs:
3180# The natural sun time is restored in all the national territory, in that the
3181# time is returned one hour at 01:00 am of October 1 of 2006.
3182#
3183# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
3184Rule	Nic	1979	1980	-	Mar	Sun>=16	0:00	1:00	D
3185Rule	Nic	1979	1980	-	Jun	Mon>=23	0:00	0	S
3186Rule	Nic	2005	only	-	Apr	10	0:00	1:00	D
3187Rule	Nic	2005	only	-	Oct	Sun>=1	0:00	0	S
3188Rule	Nic	2006	only	-	Apr	30	2:00	1:00	D
3189Rule	Nic	2006	only	-	Oct	Sun>=1	1:00	0	S
3190# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3191Zone	America/Managua	-5:45:08 -	LMT	1890
3192			-5:45:12 -	MMT	1934 Jun 23 # Managua Mean Time?
3193			-6:00	-	CST	1973 May
3194			-5:00	-	EST	1975 Feb 16
3195			-6:00	Nic	C%sT	1992 Jan  1  4:00
3196			-5:00	-	EST	1992 Sep 24
3197			-6:00	-	CST	1993
3198			-5:00	-	EST	1997
3199			-6:00	Nic	C%sT
3200
3201# Panama
3202# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3203Zone	America/Panama	-5:18:08 -	LMT	1890
3204			-5:19:36 -	CMT	1908 Apr 22 # Colón Mean Time
3205			-5:00	-	EST
3206
3207# Puerto Rico
3208# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'.
3209# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3210Zone America/Puerto_Rico -4:24:25 -	LMT	1899 Mar 28 12:00 # San Juan
3211			-4:00	-	AST	1942 May  3
3212			-4:00	US	A%sT	1946
3213			-4:00	-	AST
3214
3215# St Kitts-Nevis
3216# St Lucia
3217# See America/Port_of_Spain.
3218
3219# St Pierre and Miquelon
3220# There are too many St Pierres elsewhere, so we'll use 'Miquelon'.
3221# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3222Zone America/Miquelon	-3:44:40 -	LMT	1911 May 15 # St Pierre
3223			-4:00	-	AST	1980 May
3224			-3:00	-	PMST	1987 # Pierre & Miquelon Time
3225			-3:00	Canada	PM%sT
3226
3227# St Vincent and the Grenadines
3228# See America/Port_of_Spain.
3229
3230# Turks and Caicos
3231#
3232# From Chris Dunn in
3233# http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007
3234# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3235# daylight saving dates for time changes have been adjusted to match
3236# the recent U.S. change of dates.
3237#
3238# From Brian Inglis (2007-04-28):
3239# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
3240# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
3241# rows before that there is an out of date entry for Oct:
3242# "Eastern Standard Times Begins 2007
3243# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time"
3244# indicating that the normal ET rules are followed.
3245#
3246# From Paul Eggert (2014-08-19):
3247# The 2014-08-13 Cabinet meeting decided to stay on UTC-4 year-round.  See:
3248# http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm
3249# Model this as a switch from EST/EDT to AST ...
3250# From Chris Walton (2014-11-04):
3251# ... the TCI government appears to have delayed the switch to
3252# "permanent daylight saving time" by one year....
3253# http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm
3254#
3255# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3256Zone America/Grand_Turk	-4:44:32 -	LMT	1890
3257			-5:07:11 -	KMT	1912 Feb # Kingston Mean Time
3258			-5:00	-	EST	1979
3259			-5:00	US	E%sT	2015 Nov Sun>=1 2:00
3260			-4:00	-	AST
3261
3262# British Virgin Is
3263# Virgin Is
3264# See America/Port_of_Spain.
3265
3266
3267# Local Variables:
3268# coding: utf-8
3269# End:
3270