northamerica revision 13684:ab2ab8a6f54c
1#
2# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3#
4# This code is free software; you can redistribute it and/or modify it
5# under the terms of the GNU General Public License version 2 only, as
6# published by the Free Software Foundation.  Oracle designates this
7# particular file as subject to the "Classpath" exception as provided
8# by Oracle in the LICENSE file that accompanied this code.
9#
10# This code is distributed in the hope that it will be useful, but WITHOUT
11# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13# version 2 for more details (a copy is included in the LICENSE file that
14# accompanied this code).
15#
16# You should have received a copy of the GNU General Public License version
17# 2 along with this work; if not, write to the Free Software Foundation,
18# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19#
20# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21# or visit www.oracle.com if you need additional information or have any
22# questions.
23#
24# This file is in the public domain, so clarified as of
25# 2009-05-17 by Arthur David Olson.
26
27# also includes Central America and the Caribbean
28
29# This file is by no means authoritative; if you think you know better,
30# go ahead and edit the file (and please send any changes to
31# tz@iana.org for general use in the future).  For more, please see
32# the file CONTRIBUTING in the tz distribution.
33
34# From Paul Eggert (1999-03-22):
35# A reliable and entertaining source about time zones is
36# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
37
38###############################################################################
39
40# United States
41
42# From Paul Eggert (1999-03-31):
43# Howse writes (pp 121-125) that time zones were invented by
44# Professor Charles Ferdinand Dowd (1825-1904),
45# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).
46# His pamphlet "A System of National Time for Railroads" (1870)
47# was the result of his proposals at the Convention of Railroad Trunk Lines
48# in New York City (1869-10).  His 1870 proposal was based on Washington, DC,
49# but in 1872-05 he moved the proposed origin to Greenwich.
50# His proposal was adopted by the railroads on 1883-11-18 at 12:00,
51# and the most of the country soon followed suit.
52
53# From Paul Eggert (2005-04-16):
54# That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
55# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).
56
57# From Paul Eggert (2006-03-22):
58# A good source for time zone historical data in the US is
59# Thomas G. Shanks, The American Atlas (5th edition),
60# San Diego: ACS Publications, Inc. (1991).
61# Make sure you have the errata sheet; the book is somewhat useless without it.
62# It is the source for most of the pre-1991 US entries below.
63
64# From Paul Eggert (2001-03-06):
65# Daylight Saving Time was first suggested as a joke by Benjamin Franklin
66# in his whimsical essay "An Economical Project for Diminishing the Cost
67# of Light" published in the Journal de Paris (1784-04-26).
68# Not everyone is happy with the results:
69#
70#	I don't really care how time is reckoned so long as there is some
71#	agreement about it, but I object to being told that I am saving
72#	daylight when my reason tells me that I am doing nothing of the kind.
73#	I even object to the implication that I am wasting something
74#	valuable if I stay in bed after the sun has risen.  As an admirer
75#	of moonlight I resent the bossy insistence of those who want to
76#	reduce my time for enjoying it.  At the back of the Daylight Saving
77#	scheme I detect the bony, blue-fingered hand of Puritanism, eager
78#	to push people into bed earlier, and get them up earlier, to make
79#	them healthy, wealthy and wise in spite of themselves.
80#
81#	 -- Robertson Davies, The diary of Samuel Marchbanks,
82#	   Clarke, Irwin (1947), XIX, Sunday
83#
84# For more about the first ten years of DST in the United States, see
85# Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint
86# (Carnegie Library of Pittsburgh, 1927).
87# http://www.clpgh.org/exhibit/dst.html
88#
89# Shanks says that DST was called "War Time" in the US in 1918 and 1919.
90# However, DST was imposed by the Standard Time Act of 1918, which
91# was the first nationwide legal time standard, and apparently
92# time was just called "Standard Time" or "Daylight Saving Time".
93
94# From Arthur David Olson:
95# US Daylight Saving Time ended on the last Sunday of *October* in 1974.
96# See, for example, the front page of the Saturday, 1974-10-26
97# and Sunday, 1974-10-27 editions of the Washington Post.
98
99# From Arthur David Olson:
100# Before the Uniform Time Act of 1966 took effect in 1967, observance of
101# Daylight Saving Time in the US was by local option, except during wartime.
102
103# From Arthur David Olson (2000-09-25):
104# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
105# In the introduction, Oboler spoke of "Eastern Peace Time."
106# An AltaVista search turned up:
107# http://rowayton.org/rhs/hstaug45.html
108# "When the time is announced over the radio now, it is 'Eastern Peace
109# Time' instead of the old familiar 'Eastern War Time.'  Peace is wonderful."
110# (August 1945) by way of confirmation.
111
112# From Joseph Gallant citing
113# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
114# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
115# to switch to London for Attlee's address, but the American people
116# never got to hear his speech live. According to one press account,
117# CBS' Bob Trout was first to announce the word of Japan's surrender,
118# but a few seconds later, NBC, ABC and Mutual also flashed the word
119# of surrender, all of whom interrupting the bells of Big Ben in
120# London which were to precede Mr. Attlee's speech.
121
122# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout.  From
123# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times:
124#
125# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender.
126# Any announcement from Asia would reach St. John's New York newsroom on a
127# wire service teletype machine, which had prescribed signals for major news.
128# Associated Press, for example, would ring five bells before spewing out
129# typed copy of an important story, and 10 bells for news "of transcendental
130# importance."
131#
132# On Aug. 14, stalling while talking steadily into the NBC networks' open
133# microphone, St. John heard five bells and waited only to hear a sixth bell,
134# before announcing confidently: "Ladies and gentlemen, World War II is over.
135# The Japanese have agreed to our surrender terms."
136#
137# He had scored a 20-second scoop on other broadcasters.
138
139# From Arthur David Olson (2005-08-22):
140# Paul has been careful to use the "US" rules only in those locations
141# that are part of the United States; this reflects the real scope of
142# U.S. government action.  So even though the "US" rules have changed
143# in the latest release, other countries won't be affected.
144
145# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
146Rule	US	1918	1919	-	Mar	lastSun	2:00	1:00	D
147Rule	US	1918	1919	-	Oct	lastSun	2:00	0	S
148Rule	US	1942	only	-	Feb	9	2:00	1:00	W # War
149Rule	US	1945	only	-	Aug	14	23:00u	1:00	P # Peace
150Rule	US	1945	only	-	Sep	lastSun	2:00	0	S
151Rule	US	1967	2006	-	Oct	lastSun	2:00	0	S
152Rule	US	1967	1973	-	Apr	lastSun	2:00	1:00	D
153Rule	US	1974	only	-	Jan	6	2:00	1:00	D
154Rule	US	1975	only	-	Feb	23	2:00	1:00	D
155Rule	US	1976	1986	-	Apr	lastSun	2:00	1:00	D
156Rule	US	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
157Rule	US	2007	max	-	Mar	Sun>=8	2:00	1:00	D
158Rule	US	2007	max	-	Nov	Sun>=1	2:00	0	S
159
160# From Arthur David Olson, 2005-12-19
161# We generate the files specified below to guard against old files with
162# obsolete information being left in the time zone binary directory.
163# We limit the list to names that have appeared in previous versions of
164# this time zone package.
165# We do these as separate Zones rather than as Links to avoid problems if
166# a particular place changes whether it observes DST.
167# We put these specifications here in the northamerica file both to
168# increase the chances that they'll actually get compiled and to
169# avoid the need to duplicate the US rules in another file.
170
171# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
172Zone	EST		 -5:00	-	EST
173Zone	MST		 -7:00	-	MST
174Zone	HST		-10:00	-	HST
175Zone	EST5EDT		 -5:00	US	E%sT
176Zone	CST6CDT		 -6:00	US	C%sT
177Zone	MST7MDT		 -7:00	US	M%sT
178Zone	PST8PDT		 -8:00	US	P%sT
179
180# From Bob Devine (1988-01-28):
181# ...Alaska (and Hawaii) had the timezone names changed in 1967.
182#    old			 new
183#    Pacific Standard Time(PST)  -same-
184#    Yukon Standard Time(YST)    -same-
185#    Central Alaska S.T. (CAT)   Alaska-Hawaii St[an]dard Time (AHST)
186#    Nome Standard Time (NT)     Bering Standard Time (BST)
187#
188# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz.
189#    The YST zone now covers nearly all of the state, AHST just part
190#    of the Aleutian islands.   No DST.
191
192# From Paul Eggert (1995-12-19):
193# The tables below use 'NST', not 'NT', for Nome Standard Time.
194# I invented 'CAWT' for Central Alaska War Time.
195
196# From U. S. Naval Observatory (1989-01-19):
197# USA  EASTERN       5 H  BEHIND UTC    NEW YORK, WASHINGTON
198# USA  EASTERN       4 H  BEHIND UTC    APR 3 - OCT 30
199# USA  CENTRAL       6 H  BEHIND UTC    CHICAGO, HOUSTON
200# USA  CENTRAL       5 H  BEHIND UTC    APR 3 - OCT 30
201# USA  MOUNTAIN      7 H  BEHIND UTC    DENVER
202# USA  MOUNTAIN      6 H  BEHIND UTC    APR 3 - OCT 30
203# USA  PACIFIC       8 H  BEHIND UTC    L.A., SAN FRANCISCO
204# USA  PACIFIC       7 H  BEHIND UTC    APR 3 - OCT 30
205# USA  ALASKA STD    9 H  BEHIND UTC    MOST OF ALASKA     (AKST)
206# USA  ALASKA STD    8 H  BEHIND UTC    APR 3 - OCT 30 (AKDT)
207# USA  ALEUTIAN     10 H  BEHIND UTC    ISLANDS WEST OF 170W
208# USA    "           9 H  BEHIND UTC    APR 3 - OCT 30
209# USA  HAWAII       10 H  BEHIND UTC
210# USA  BERING       11 H  BEHIND UTC    SAMOA, MIDWAY
211
212# From Arthur David Olson (1989-01-21):
213# The above dates are for 1988.
214# Note the "AKST" and "AKDT" abbreviations, the claim that there's
215# no DST in Samoa, and the claim that there is DST in Alaska and the
216# Aleutians.
217
218# From Arthur David Olson (1988-02-13):
219# Legal standard time zone names, from United States Code (1982 Edition and
220# Supplement III), Title 15, Chapter 6, Section 260 and forward.  First, names
221# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966
222# took effect), as explained in sections 263 and 261:
223#	(none)
224#	United States standard eastern time
225#	United States standard mountain time
226#	United States standard central time
227#	United States standard Pacific time
228#	(none)
229#	United States standard Alaska time
230#	(none)
231# Next, names from 1967-04-01 until 1983-11-30 (the date for
232# public law 98-181):
233#	Atlantic standard time
234#	eastern standard time
235#	central standard time
236#	mountain standard time
237#	Pacific standard time
238#	Yukon standard time
239#	Alaska-Hawaii standard time
240#	Bering standard time
241# And after 1983-11-30:
242#	Atlantic standard time
243#	eastern standard time
244#	central standard time
245#	mountain standard time
246#	Pacific standard time
247#	Alaska standard time
248#	Hawaii-Aleutian standard time
249#	Samoa standard time
250# The law doesn't give abbreviations.
251#
252# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
253# Public law 106-564 (2000-12-23) introduced ... "Chamorro Standard Time"
254# for time in Guam and the Northern Marianas.  See the file "australasia".
255#
256# From Paul Eggert (2015-04-17):
257# HST and HDT are standardized abbreviations for Hawaii-Aleutian
258# standard and daylight times.  See section 9.47 (p 234) of the
259# U.S. Government Printing Office Style Manual (2008)
260# http://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf
261
262# From Arthur David Olson, 2005-08-09
263# The following was signed into law on 2005-08-08.
264#
265# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
266#   (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15
267#   U.S.C. 260a(a)) is amended--
268#     (1) by striking "first Sunday of April" and inserting "second
269#     Sunday of March"; and
270#     (2) by striking "last Sunday of October" and inserting "first
271#     Sunday of November'.
272#   (b) Effective Date.--Subsection (a) shall take effect 1 year after the
273#   date of enactment of this Act or March 1, 2007, whichever is later.
274#   (c) Report to Congress.--Not later than 9 months after the effective
275#   date stated in subsection (b), the Secretary shall report to Congress
276#   on the impact of this section on energy consumption in the United
277#   States.
278#   (d) Right to Revert.--Congress retains the right to revert the
279#   Daylight Saving Time back to the 2005 time schedules once the
280#   Department study is complete.
281
282# US eastern time, represented by New York
283
284# Connecticut, Delaware, District of Columbia, most of Florida,
285# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky
286# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts,
287# New Hampshire, New Jersey, New York, North Carolina, Ohio,
288# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee,
289# Vermont, Virginia, West Virginia
290
291# From Dave Cantor (2004-11-02):
292# Early this summer I had the occasion to visit the Mount Washington
293# Observatory weather station atop (of course!) Mount Washington [, NH]....
294# One of the staff members said that the station was on Eastern Standard Time
295# and didn't change their clocks for Daylight Saving ... so that their
296# reports will always have times which are 5 hours behind UTC.
297
298# From Paul Eggert (2005-08-26):
299# According to today's Huntsville Times
300# http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1
301# a few towns on Alabama's "eastern border with Georgia, such as Phenix City
302# in Russell County, Lanett in Chambers County and some towns in Lee County,
303# set their watches and clocks on Eastern time."  It quotes H.H. "Bubba"
304# Roberts, city administrator in Phenix City. as saying "We are in the Central
305# time zone, but we do go by the Eastern time zone because so many people work
306# in Columbus."
307
308# From Paul Eggert (2014-09-06):
309# Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208
310# says that New York City Hall time was 3 minutes 58.4 seconds fast of
311# Eastern time (i.e., -4:56:01.6) just before the 1883 switch.  Round to the
312# nearest second.
313
314# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
315Rule	NYC	1920	only	-	Mar	lastSun	2:00	1:00	D
316Rule	NYC	1920	only	-	Oct	lastSun	2:00	0	S
317Rule	NYC	1921	1966	-	Apr	lastSun	2:00	1:00	D
318Rule	NYC	1921	1954	-	Sep	lastSun	2:00	0	S
319Rule	NYC	1955	1966	-	Oct	lastSun	2:00	0	S
320# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
321Zone America/New_York	-4:56:02 -	LMT	1883 Nov 18 12:03:58
322			-5:00	US	E%sT	1920
323			-5:00	NYC	E%sT	1942
324			-5:00	US	E%sT	1946
325			-5:00	NYC	E%sT	1967
326			-5:00	US	E%sT
327
328# US central time, represented by Chicago
329
330# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
331# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
332# Washington counties), Illinois, western Indiana
333# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
334# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
335# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
336# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
337# western Tennessee, most of Texas, Wisconsin
338
339# From Larry M. Smith (2006-04-26) re Wisconsin:
340# http://www.legis.state.wi.us/statutes/Stat0175.pdf ...
341# is currently enforced at the 01:00 time of change.  Because the local
342# "bar time" in the state corresponds to 02:00, a number of citations
343# are issued for the "sale of class 'B' alcohol after prohibited
344# hours" within the deviated hour of this change every year....
345#
346# From Douglas R. Bomberg (2007-03-12):
347# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI
348# Statue 175 closer in synch with the US Congress' intent....
349# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf
350
351# From an email administrator of the City of Fort Pierre, SD (2015-12-21):
352# Fort Pierre is technically located in the Mountain time zone as is
353# the rest of Stanley County.  Most of Stanley County and Fort Pierre
354# uses the Central time zone due to doing most of their business in
355# Pierre so it simplifies schedules.  I have lived in Stanley County
356# all my life and it has been that way since I can remember.  (43 years!)
357#
358# From Paul Eggert (2015-12-25):
359# Assume this practice predates 1970, so Fort Pierre can use America/Chicago.
360
361# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
362Rule	Chicago	1920	only	-	Jun	13	2:00	1:00	D
363Rule	Chicago	1920	1921	-	Oct	lastSun	2:00	0	S
364Rule	Chicago	1921	only	-	Mar	lastSun	2:00	1:00	D
365Rule	Chicago	1922	1966	-	Apr	lastSun	2:00	1:00	D
366Rule	Chicago	1922	1954	-	Sep	lastSun	2:00	0	S
367Rule	Chicago	1955	1966	-	Oct	lastSun	2:00	0	S
368# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
369Zone America/Chicago	-5:50:36 -	LMT	1883 Nov 18 12:09:24
370			-6:00	US	C%sT	1920
371			-6:00	Chicago	C%sT	1936 Mar  1  2:00
372			-5:00	-	EST	1936 Nov 15  2:00
373			-6:00	Chicago	C%sT	1942
374			-6:00	US	C%sT	1946
375			-6:00	Chicago	C%sT	1967
376			-6:00	US	C%sT
377# Oliver County, ND switched from mountain to central time on 1992-10-25.
378Zone America/North_Dakota/Center -6:45:12 - LMT	1883 Nov 18 12:14:48
379			-7:00	US	M%sT	1992 Oct 25  2:00
380			-6:00	US	C%sT
381# Morton County, ND, switched from mountain to central time on
382# 2003-10-26, except for the area around Mandan which was already central time.
383# See <http://dmses.dot.gov/docimages/p63/135818.pdf>.
384# Officially this switch also included part of Sioux County, and
385# Jones, Mellette, and Todd Counties in South Dakota;
386# but in practice these other counties were already observing central time.
387# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.
388Zone America/North_Dakota/New_Salem -6:45:39 - LMT	1883 Nov 18 12:14:21
389			-7:00	US	M%sT	2003 Oct 26  2:00
390			-6:00	US	C%sT
391
392# From Josh Findley (2011-01-21):
393# ...it appears that Mercer County, North Dakota, changed from the
394# mountain time zone to the central time zone at the last transition from
395# daylight-saving to standard time (on Nov. 7, 2010):
396# http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm
397# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html
398
399# From Andy Lipscomb (2011-01-24):
400# ...according to the Census Bureau, the largest city is Beulah (although
401# it's commonly referred to as Beulah-Hazen, with Hazen being the next
402# largest city in Mercer County).  Google Maps places Beulah's city hall
403# at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset
404# of 6h47'07".
405
406Zone America/North_Dakota/Beulah -6:47:07 - LMT	1883 Nov 18 12:12:53
407			-7:00	US	M%sT	2010 Nov  7  2:00
408			-6:00	US	C%sT
409
410# US mountain time, represented by Denver
411#
412# Colorado, far western Kansas, Montana, western
413# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City),
414# New Mexico, southwestern North Dakota,
415# western South Dakota, far western Texas (El Paso County, Hudspeth County,
416# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming
417#
418# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
419Rule	Denver	1920	1921	-	Mar	lastSun	2:00	1:00	D
420Rule	Denver	1920	only	-	Oct	lastSun	2:00	0	S
421Rule	Denver	1921	only	-	May	22	2:00	0	S
422Rule	Denver	1965	1966	-	Apr	lastSun	2:00	1:00	D
423Rule	Denver	1965	1966	-	Oct	lastSun	2:00	0	S
424# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
425Zone America/Denver	-6:59:56 -	LMT	1883 Nov 18 12:00:04
426			-7:00	US	M%sT	1920
427			-7:00	Denver	M%sT	1942
428			-7:00	US	M%sT	1946
429			-7:00	Denver	M%sT	1967
430			-7:00	US	M%sT
431
432# US Pacific time, represented by Los Angeles
433#
434# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
435# Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county
436# north of the Salmon River, and the towns of Burgdorf and Warren),
437# Nevada (except West Wendover), Oregon (except the northern 3/4 of
438# Malheur county), and Washington
439#
440# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
441Rule	CA	1948	only	-	Mar	14	2:00	1:00	D
442Rule	CA	1949	only	-	Jan	 1	2:00	0	S
443Rule	CA	1950	1966	-	Apr	lastSun	2:00	1:00	D
444Rule	CA	1950	1961	-	Sep	lastSun	2:00	0	S
445Rule	CA	1962	1966	-	Oct	lastSun	2:00	0	S
446# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
447Zone America/Los_Angeles -7:52:58 -	LMT	1883 Nov 18 12:07:02
448			-8:00	US	P%sT	1946
449			-8:00	CA	P%sT	1967
450			-8:00	US	P%sT
451
452# Alaska
453# AK%sT is the modern abbreviation for -9:00 per USNO.
454#
455# From Paul Eggert (2001-05-30):
456# Howse writes that Alaska switched from the Julian to the Gregorian calendar,
457# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
458# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian,
459# also a Friday.  Include only the time zone part of this transition,
460# ignoring the switch from Julian to Gregorian, since we can't represent
461# the Julian calendar.
462#
463# As far as we know, none of the exact locations mentioned below were
464# permanently inhabited in 1867 by anyone using either calendar.
465# (Yakutat was colonized by the Russians in 1799, but the settlement
466# was destroyed in 1805 by a Yakutat-kon war party.)  However, there
467# were nearby inhabitants in some cases and for our purposes perhaps
468# it's best to simply use the official transition.
469
470# From Paul Eggert (2014-07-18):
471# One opinion of the early-1980s turmoil in Alaska over time zones and
472# daylight saving time appeared as graffiti on a Juneau airport wall:
473# "Welcome to Juneau.  Please turn your watch back to the 19th century."
474# See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01.
475# http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html
476#
477# Steve Ferguson (2011-01-31) referred to the following source:
478# Norris F. Keeping time in Alaska: national directives, local response.
479# Alaska History 2001;16(1-2).
480# http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/
481
482# From Arthur David Olson (2011-02-01):
483# Here's database-relevant material from the 2001 "Alaska History" article:
484#
485# On September 20 [1979]...DOT...officials decreed that on April 27,
486# 1980, Juneau and other nearby communities would move to Yukon Time.
487# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on
488# Pacific Time.
489#
490# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the
491# Department's September 1979 decision. Juneau and other communities in
492# northern Southeast reverted to Pacific Time on October 26.
493#
494# On October 28 [1983]...the Metlakatla Indian Community Council voted
495# unanimously to keep the reservation on Pacific Time.
496#
497# According to DOT official Joanne Petrie, Indian reservations are not
498# bound to follow time zones imposed by neighboring jurisdictions.
499#
500# (The last is consistent with how the database now handles the Navajo
501# Nation.)
502
503# From Arthur David Olson (2011-02-09):
504# I just spoke by phone with a staff member at the Metlakatla Indian
505# Community office (using contact information available at
506# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla
507# It's shortly after 1:00 here on the east coast of the United States;
508# the staffer said it was shortly after 10:00 there. When I asked whether
509# that meant they were on Pacific time, they said no - they were on their
510# own time. I asked about daylight saving; they said it wasn't used. I
511# did not inquire about practices in the past.
512
513# From Arthur David Olson (2011-08-17):
514# For lack of better information, assume that Metlakatla's
515# abandonment of use of daylight saving resulted from the 1983 vote.
516
517# From Steffen Thorsen (2015-11-09):
518# It seems Metlakatla did go off PST on Sunday, November 1, changing
519# their time to AKST and are going to follow Alaska's DST, switching
520# between AKST and AKDT from now on....
521# http://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/
522
523# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
524Zone America/Juneau	 15:02:19 -	LMT	1867 Oct 18
525			 -8:57:41 -	LMT	1900 Aug 20 12:00
526			 -8:00	-	PST	1942
527			 -8:00	US	P%sT	1946
528			 -8:00	-	PST	1969
529			 -8:00	US	P%sT	1980 Apr 27  2:00
530			 -9:00	US	Y%sT	1980 Oct 26  2:00
531			 -8:00	US	P%sT	1983 Oct 30  2:00
532			 -9:00	US	Y%sT	1983 Nov 30
533			 -9:00	US	AK%sT
534Zone America/Sitka	 14:58:47 -	LMT	1867 Oct 18
535			 -9:01:13 -	LMT	1900 Aug 20 12:00
536			 -8:00	-	PST	1942
537			 -8:00	US	P%sT	1946
538			 -8:00	-	PST	1969
539			 -8:00	US	P%sT	1983 Oct 30  2:00
540			 -9:00	US	Y%sT	1983 Nov 30
541			 -9:00	US	AK%sT
542Zone America/Metlakatla	 15:13:42 -	LMT	1867 Oct 18
543			 -8:46:18 -	LMT	1900 Aug 20 12:00
544			 -8:00	-	PST	1942
545			 -8:00	US	P%sT	1946
546			 -8:00	-	PST	1969
547			 -8:00	US	P%sT	1983 Oct 30  2:00
548			 -8:00	-	PST	2015 Nov  1  2:00
549			 -9:00	US	AK%sT
550Zone America/Yakutat	 14:41:05 -	LMT	1867 Oct 18
551			 -9:18:55 -	LMT	1900 Aug 20 12:00
552			 -9:00	-	YST	1942
553			 -9:00	US	Y%sT	1946
554			 -9:00	-	YST	1969
555			 -9:00	US	Y%sT	1983 Nov 30
556			 -9:00	US	AK%sT
557Zone America/Anchorage	 14:00:24 -	LMT	1867 Oct 18
558			 -9:59:36 -	LMT	1900 Aug 20 12:00
559			-10:00	-	CAT	1942
560			-10:00	US	CAT/CAWT 1945 Aug 14 23:00u
561			-10:00	US	CAT/CAPT 1946 # Peace
562			-10:00	-	CAT	1967 Apr
563			-10:00	-	AHST	1969
564			-10:00	US	AH%sT	1983 Oct 30  2:00
565			 -9:00	US	Y%sT	1983 Nov 30
566			 -9:00	US	AK%sT
567Zone America/Nome	 12:58:21 -	LMT	1867 Oct 18
568			-11:01:38 -	LMT	1900 Aug 20 12:00
569			-11:00	-	NST	1942
570			-11:00	US	N%sT	1946
571			-11:00	-	NST	1967 Apr
572			-11:00	-	BST	1969
573			-11:00	US	B%sT	1983 Oct 30  2:00
574			 -9:00	US	Y%sT	1983 Nov 30
575			 -9:00	US	AK%sT
576Zone America/Adak	 12:13:21 -	LMT	1867 Oct 18
577			-11:46:38 -	LMT	1900 Aug 20 12:00
578			-11:00	-	NST	1942
579			-11:00	US	N%sT	1946
580			-11:00	-	NST	1967 Apr
581			-11:00	-	BST	1969
582			-11:00	US	B%sT	1983 Oct 30  2:00
583			-10:00	US	AH%sT	1983 Nov 30
584			-10:00	US	H%sT
585# The following switches don't quite make our 1970 cutoff.
586#
587# Shanks writes that part of southwest Alaska (e.g. Aniak)
588# switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
589# and another part (e.g. Akiak) made the same switch five weeks later.
590#
591# From David Flater (2004-11-09):
592# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska
593# Historic Preservation Commission, provided this information, which
594# suggests that Unalaska deviated from statutory time from early 1967
595# possibly until 1983:
596#
597#  Minutes of the Unalaska City Council Meeting, January 10, 1967:
598#  "Except for St. Paul and Akutan, Unalaska is the only important
599#  location not on Alaska Standard Time.  The following resolution was
600#  made by William Robinson and seconded by Henry Swanson: Be it
601#  resolved that the City of Unalaska hereby goes to Alaska Standard
602#  Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday,
603#  January 14, Alaska Standard Time.)  This resolution was passed with
604#  three votes for and one against."
605
606# Hawaii
607
608# From Arthur David Olson (2010-12-09):
609# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225
610# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09,
611# the article is available at
612# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf
613# and indicates that standard time was adopted effective noon, January
614# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight
615# saving for the period between the last Sunday of each April and the
616# last Sunday of each September, but less than a month later repealed the
617# act," (page 220), that year-round daylight saving time was in effect
618# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for
619# when clocks changed) and that clocks were changed by 30 minutes
620# effective the second Sunday of June, 1947 (page 219, with no time of
621# day given for when clocks changed). A footnote for the 1933 changes
622# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933)
623# and Act 163 (approved 21 May 1933)."
624
625# From Arthur David Olson (2011-01-19):
626# The following is from "Laws of the Territory of Hawaii Passed by the
627# Seventeenth Legislature: Regular Session 1933," available (as of
628# 2011-01-19) at American University's Pence Law Library. Page 85: "Act
629# 90...At 2 o'clock ante meridian of the last Sunday in April of each
630# year, the standard time of this Territory shall be advanced one
631# hour...This Act shall take effect upon its approval. Approved this 26th
632# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of
633# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is
634# hereby repealed...This Act shall take effect upon its approval, upon
635# which date the standard time of this Territory shall be restored to
636# that existing immediately prior to the taking effect of said Act 90.
637# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor
638# of the Territory of Hawaii."
639#
640# Note that 1933-05-21 was a Sunday.
641# We're left to guess the time of day when Act 163 was approved; guess noon.
642
643# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
644Zone Pacific/Honolulu	-10:31:26 -	LMT	1896 Jan 13 12:00
645			-10:30	-	HST	1933 Apr 30  2:00
646			-10:30	1:00	HDT	1933 May 21 12:00
647			-10:30	-	HST	1942 Feb  9  2:00
648			-10:30	1:00	HDT	1945 Sep 30  2:00
649			-10:30	-	HST	1947 Jun  8  2:00
650			-10:00	-	HST
651Link Pacific/Honolulu Pacific/Johnston
652
653# Now we turn to US areas that have diverged from the consensus since 1970.
654
655# Arizona mostly uses MST.
656
657# From Paul Eggert (2002-10-20):
658#
659# The information in the rest of this paragraph is derived from the
660# Daylight Saving Time web page
661# <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23)
662# maintained by the Arizona State Library, Archives and Public Records.
663# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
664# time, but by federal law railroads, airlines, bus lines, military
665# personnel, and some engaged in interstate commerce continued to
666# observe war (i.e., daylight saving) time.  The 1944-03-17 Phoenix
667# Gazette says that was the date the law changed, and that 04-01 was
668# the date the state's clocks would change.  In 1945 the State of
669# Arizona used standard time all year, again with exceptions only as
670# mandated by federal law.  Arizona observed DST in 1967, but Arizona
671# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
672#
673# Shanks says the 1944 experiment came to an end on 1944-03-17.
674# Go with the Arizona State Library instead.
675
676# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
677Zone America/Phoenix	-7:28:18 -	LMT	1883 Nov 18 11:31:42
678			-7:00	US	M%sT	1944 Jan  1  0:01
679			-7:00	-	MST	1944 Apr  1  0:01
680			-7:00	US	M%sT	1944 Oct  1  0:01
681			-7:00	-	MST	1967
682			-7:00	US	M%sT	1968 Mar 21
683			-7:00	-	MST
684# From Arthur David Olson (1988-02-13):
685# A writer from the Inter Tribal Council of Arizona, Inc.,
686# notes in private correspondence dated 1987-12-28 that "Presently, only the
687# Navajo Nation participates in the Daylight Saving Time policy, due to its
688# large size and location in three states."  (The "only" means that other
689# tribal nations don't use DST.)
690#
691# From Paul Eggert (2013-08-26):
692# See America/Denver for a zone appropriate for the Navajo Nation.
693
694# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
695# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
696# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
697# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
698# Teton, Twin Falls, Valley, Washington counties, and the southern
699# quarter of Idaho county) and eastern Oregon (most of Malheur County)
700# switched four weeks late in 1974.
701#
702# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
703Zone America/Boise	-7:44:49 -	LMT	1883 Nov 18 12:15:11
704			-8:00	US	P%sT	1923 May 13  2:00
705			-7:00	US	M%sT	1974
706			-7:00	-	MST	1974 Feb  3  2:00
707			-7:00	US	M%sT
708
709# Indiana
710#
711# For a map of Indiana's time zone regions, see:
712# http://en.wikipedia.org/wiki/Time_in_Indiana
713#
714# From Paul Eggert (2007-08-17):
715# Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
716# with the following exceptions:
717#
718# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
719#   Vanderburgh, and Warrick counties have been like America/Chicago.
720#
721# - Dearborn and Ohio counties have been like America/New_York.
722#
723# - Clark, Floyd, and Harrison counties have been like
724#   America/Kentucky/Louisville.
725#
726# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke,
727#   and Switzerland counties have their own time zone histories as noted below.
728#
729# Shanks partitioned Indiana into 345 regions, each with its own time history,
730# and wrote "Even newspaper reports present contradictory information."
731# Those Hoosiers!  Such a flighty and changeable people!
732# Fortunately, most of the complexity occurred before our cutoff date of 1970.
733#
734# Other than Indianapolis, the Indiana place names are so nondescript
735# that they would be ambiguous if we left them at the 'America' level.
736# So we reluctantly put them all in a subdirectory 'America/Indiana'.
737
738# From Paul Eggert (2014-06-26):
739# https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana
740# says "DOT is relocating the time zone boundary in Indiana to move Starke,
741# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the
742# Eastern Time Zone to the Central Time Zone.... The effective date of
743# this rule is 2 a.m. EST Sunday, April 2, 2006, which is the
744# changeover date from standard time to Daylight Saving Time."
745# Strictly speaking, this meant the affected counties changed their
746# clocks twice that night, but this obviously was in error.  The intent
747# was that 01:59:59 EST be followed by 02:00:00 CDT.
748
749# From Gwillim Law (2007-02-10):
750# The Associated Press has been reporting that Pulaski County, Indiana is
751# going to switch from Central to Eastern Time on March 11, 2007....
752# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL
753
754# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
755Rule Indianapolis 1941	only	-	Jun	22	2:00	1:00	D
756Rule Indianapolis 1941	1954	-	Sep	lastSun	2:00	0	S
757Rule Indianapolis 1946	1954	-	Apr	lastSun	2:00	1:00	D
758# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
759Zone America/Indiana/Indianapolis -5:44:38 - LMT	1883 Nov 18 12:15:22
760			-6:00	US	C%sT	1920
761			-6:00 Indianapolis C%sT	1942
762			-6:00	US	C%sT	1946
763			-6:00 Indianapolis C%sT	1955 Apr 24  2:00
764			-5:00	-	EST	1957 Sep 29  2:00
765			-6:00	-	CST	1958 Apr 27  2:00
766			-5:00	-	EST	1969
767			-5:00	US	E%sT	1971
768			-5:00	-	EST	2006
769			-5:00	US	E%sT
770#
771# Eastern Crawford County, Indiana, left its clocks alone in 1974,
772# as well as from 1976 through 2005.
773# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
774Rule	Marengo	1951	only	-	Apr	lastSun	2:00	1:00	D
775Rule	Marengo	1951	only	-	Sep	lastSun	2:00	0	S
776Rule	Marengo	1954	1960	-	Apr	lastSun	2:00	1:00	D
777Rule	Marengo	1954	1960	-	Sep	lastSun	2:00	0	S
778# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
779Zone America/Indiana/Marengo -5:45:23 -	LMT	1883 Nov 18 12:14:37
780			-6:00	US	C%sT	1951
781			-6:00	Marengo	C%sT	1961 Apr 30  2:00
782			-5:00	-	EST	1969
783			-5:00	US	E%sT	1974 Jan  6  2:00
784			-6:00	1:00	CDT	1974 Oct 27  2:00
785			-5:00	US	E%sT	1976
786			-5:00	-	EST	2006
787			-5:00	US	E%sT
788#
789# Daviess, Dubois, Knox, and Martin Counties, Indiana,
790# switched from eastern to central time in April 2006, then switched back
791# in November 2007.
792# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
793Rule Vincennes	1946	only	-	Apr	lastSun	2:00	1:00	D
794Rule Vincennes	1946	only	-	Sep	lastSun	2:00	0	S
795Rule Vincennes	1953	1954	-	Apr	lastSun	2:00	1:00	D
796Rule Vincennes	1953	1959	-	Sep	lastSun	2:00	0	S
797Rule Vincennes	1955	only	-	May	 1	0:00	1:00	D
798Rule Vincennes	1956	1963	-	Apr	lastSun	2:00	1:00	D
799Rule Vincennes	1960	only	-	Oct	lastSun	2:00	0	S
800Rule Vincennes	1961	only	-	Sep	lastSun	2:00	0	S
801Rule Vincennes	1962	1963	-	Oct	lastSun	2:00	0	S
802# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
803Zone America/Indiana/Vincennes -5:50:07 - LMT	1883 Nov 18 12:09:53
804			-6:00	US	C%sT	1946
805			-6:00 Vincennes	C%sT	1964 Apr 26  2:00
806			-5:00	-	EST	1969
807			-5:00	US	E%sT	1971
808			-5:00	-	EST	2006 Apr  2  2:00
809			-6:00	US	C%sT	2007 Nov  4  2:00
810			-5:00	US	E%sT
811#
812# Perry County, Indiana, switched from eastern to central time in April 2006.
813# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
814Rule Perry	1946	only	-	Apr	lastSun	2:00	1:00	D
815Rule Perry	1946	only	-	Sep	lastSun	2:00	0	S
816Rule Perry	1953	1954	-	Apr	lastSun	2:00	1:00	D
817Rule Perry	1953	1959	-	Sep	lastSun	2:00	0	S
818Rule Perry	1955	only	-	May	 1	0:00	1:00	D
819Rule Perry	1956	1963	-	Apr	lastSun	2:00	1:00	D
820Rule Perry	1960	only	-	Oct	lastSun	2:00	0	S
821Rule Perry	1961	only	-	Sep	lastSun	2:00	0	S
822Rule Perry	1962	1963	-	Oct	lastSun	2:00	0	S
823# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
824Zone America/Indiana/Tell_City -5:47:03 - LMT	1883 Nov 18 12:12:57
825			-6:00	US	C%sT	1946
826			-6:00 Perry	C%sT	1964 Apr 26  2:00
827			-5:00	-	EST	1969
828			-5:00	US	E%sT	1971
829			-5:00	-	EST	2006 Apr  2  2:00
830			-6:00	US	C%sT
831#
832# Pike County, Indiana moved from central to eastern time in 1977,
833# then switched back in 2006, then switched back again in 2007.
834# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
835Rule	Pike	1955	only	-	May	 1	0:00	1:00	D
836Rule	Pike	1955	1960	-	Sep	lastSun	2:00	0	S
837Rule	Pike	1956	1964	-	Apr	lastSun	2:00	1:00	D
838Rule	Pike	1961	1964	-	Oct	lastSun	2:00	0	S
839# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
840Zone America/Indiana/Petersburg -5:49:07 - LMT	1883 Nov 18 12:10:53
841			-6:00	US	C%sT	1955
842			-6:00	Pike	C%sT	1965 Apr 25  2:00
843			-5:00	-	EST	1966 Oct 30  2:00
844			-6:00	US	C%sT	1977 Oct 30  2:00
845			-5:00	-	EST	2006 Apr  2  2:00
846			-6:00	US	C%sT	2007 Nov  4  2:00
847			-5:00	US	E%sT
848#
849# Starke County, Indiana moved from central to eastern time in 1991,
850# then switched back in 2006.
851# From Arthur David Olson (1991-10-28):
852# An article on page A3 of the Sunday, 1991-10-27 Washington Post
853# notes that Starke County switched from Central time to Eastern time as of
854# 1991-10-27.
855# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
856Rule	Starke	1947	1961	-	Apr	lastSun	2:00	1:00	D
857Rule	Starke	1947	1954	-	Sep	lastSun	2:00	0	S
858Rule	Starke	1955	1956	-	Oct	lastSun	2:00	0	S
859Rule	Starke	1957	1958	-	Sep	lastSun	2:00	0	S
860Rule	Starke	1959	1961	-	Oct	lastSun	2:00	0	S
861# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
862Zone America/Indiana/Knox -5:46:30 -	LMT	1883 Nov 18 12:13:30
863			-6:00	US	C%sT	1947
864			-6:00	Starke	C%sT	1962 Apr 29  2:00
865			-5:00	-	EST	1963 Oct 27  2:00
866			-6:00	US	C%sT	1991 Oct 27  2:00
867			-5:00	-	EST	2006 Apr  2  2:00
868			-6:00	US	C%sT
869#
870# Pulaski County, Indiana, switched from eastern to central time in
871# April 2006 and then switched back in March 2007.
872# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
873Rule	Pulaski	1946	1960	-	Apr	lastSun	2:00	1:00	D
874Rule	Pulaski	1946	1954	-	Sep	lastSun	2:00	0	S
875Rule	Pulaski	1955	1956	-	Oct	lastSun	2:00	0	S
876Rule	Pulaski	1957	1960	-	Sep	lastSun	2:00	0	S
877# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
878Zone America/Indiana/Winamac -5:46:25 - LMT	1883 Nov 18 12:13:35
879			-6:00	US	C%sT	1946
880			-6:00	Pulaski	C%sT	1961 Apr 30  2:00
881			-5:00	-	EST	1969
882			-5:00	US	E%sT	1971
883			-5:00	-	EST	2006 Apr  2  2:00
884			-6:00	US	C%sT	2007 Mar 11  2:00
885			-5:00	US	E%sT
886#
887# Switzerland County, Indiana, did not observe DST from 1973 through 2005.
888# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
889Zone America/Indiana/Vevay -5:40:16 -	LMT	1883 Nov 18 12:19:44
890			-6:00	US	C%sT	1954 Apr 25  2:00
891			-5:00	-	EST	1969
892			-5:00	US	E%sT	1973
893			-5:00	-	EST	2006
894			-5:00	US	E%sT
895
896# Part of Kentucky left its clocks alone in 1974.
897# This also includes Clark, Floyd, and Harrison counties in Indiana.
898# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
899Rule Louisville	1921	only	-	May	1	2:00	1:00	D
900Rule Louisville	1921	only	-	Sep	1	2:00	0	S
901Rule Louisville	1941	1961	-	Apr	lastSun	2:00	1:00	D
902Rule Louisville	1941	only	-	Sep	lastSun	2:00	0	S
903Rule Louisville	1946	only	-	Jun	2	2:00	0	S
904Rule Louisville	1950	1955	-	Sep	lastSun	2:00	0	S
905Rule Louisville	1956	1960	-	Oct	lastSun	2:00	0	S
906# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
907Zone America/Kentucky/Louisville -5:43:02 -	LMT	1883 Nov 18 12:16:58
908			-6:00	US	C%sT	1921
909			-6:00 Louisville C%sT	1942
910			-6:00	US	C%sT	1946
911			-6:00 Louisville C%sT	1961 Jul 23  2:00
912			-5:00	-	EST	1968
913			-5:00	US	E%sT	1974 Jan  6  2:00
914			-6:00	1:00	CDT	1974 Oct 27  2:00
915			-5:00	US	E%sT
916#
917# Wayne County, Kentucky
918#
919# From Lake Cumberland LIFE
920# http://www.lake-cumberland.com/life/archive/news990129time.shtml
921# (1999-01-29) via WKYM-101.7:
922# Clinton County has joined Wayne County in asking the DoT to change from
923# the Central to the Eastern time zone....  The Wayne County government made
924# the same request in December.  And while Russell County officials have not
925# taken action, the majority of respondents to a poll conducted there in
926# August indicated they would like to change to "fast time" also.
927# The three Lake Cumberland counties are the farthest east of any U.S.
928# location in the Central time zone.
929#
930# From Rich Wales (2000-08-29):
931# After prolonged debate, and despite continuing deep differences of opinion,
932# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
933# (-0500) time.  They won't "fall back" this year.  See Sara Shipley,
934# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
935#
936# From Paul Eggert (2001-07-16):
937# The final rule was published in the
938# Federal Register 65, 160 (2000-08-17), pp 50154-50158.
939# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22
940#
941Zone America/Kentucky/Monticello -5:39:24 - LMT	1883 Nov 18 12:20:36
942			-6:00	US	C%sT	1946
943			-6:00	-	CST	1968
944			-6:00	US	C%sT	2000 Oct 29  2:00
945			-5:00	US	E%sT
946
947
948# From Rives McDow (2000-08-30):
949# Here ... are all the changes in the US since 1985.
950# Kearny County, KS (put all of county on central;
951#	previously split between MST and CST) ... 1990-10
952# Starke County, IN (from CST to EST) ... 1991-10
953# Oliver County, ND (from MST to CST) ... 1992-10
954# West Wendover, NV (from PST TO MST) ... 1999-10
955# Wayne County, KY (from CST to EST) ... 2000-10
956#
957# From Paul Eggert (2001-07-17):
958# We don't know where the line used to be within Kearny County, KS,
959# so omit that change for now.
960# See America/Indiana/Knox for the Starke County, IN change.
961# See America/North_Dakota/Center for the Oliver County, ND change.
962# West Wendover, NV officially switched from Pacific to mountain time on
963# 1999-10-31.  See the
964# Federal Register 64, 203 (1999-10-21), pp 56705-56707.
965# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15
966# However, the Federal Register says that West Wendover already operated
967# on mountain time, and the rule merely made this official;
968# hence a separate tz entry is not needed.
969
970# Michigan
971#
972# From Bob Devine (1988-01-28):
973# Michigan didn't observe DST from 1968 to 1973.
974#
975# From Paul Eggert (1999-03-31):
976# Shanks writes that Michigan started using standard time on 1885-09-18,
977# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01)
978# that Detroit kept
979#
980#	local time until 1900 when the City Council decreed that clocks should
981#	be put back twenty-eight minutes to Central Standard Time.  Half the
982#	city obeyed, half refused.  After considerable debate, the decision
983#	was rescinded and the city reverted to Sun time.  A derisive offer to
984#	erect a sundial in front of the city hall was referred to the
985#	Committee on Sewers.  Then, in 1905, Central time was adopted
986#	by city vote.
987#
988# This story is too entertaining to be false, so go with Howse over Shanks.
989#
990# From Paul Eggert (2001-03-06):
991# Garland (1927) writes "Cleveland and Detroit advanced their clocks
992# one hour in 1914."  This change is not in Shanks.  We have no more
993# info, so omit this for now.
994#
995# Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
996# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
997Rule	Detroit	1948	only	-	Apr	lastSun	2:00	1:00	D
998Rule	Detroit	1948	only	-	Sep	lastSun	2:00	0	S
999Rule	Detroit	1967	only	-	Jun	14	2:00	1:00	D
1000Rule	Detroit	1967	only	-	Oct	lastSun	2:00	0	S
1001# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1002Zone America/Detroit	-5:32:11 -	LMT	1905
1003			-6:00	-	CST	1915 May 15  2:00
1004			-5:00	-	EST	1942
1005			-5:00	US	E%sT	1946
1006			-5:00	Detroit	E%sT	1973
1007			-5:00	US	E%sT	1975
1008			-5:00	-	EST	1975 Apr 27  2:00
1009			-5:00	US	E%sT
1010#
1011# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan,
1012# switched from EST to CST/CDT in 1973.
1013# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
1014Rule Menominee	1946	only	-	Apr	lastSun	2:00	1:00	D
1015Rule Menominee	1946	only	-	Sep	lastSun	2:00	0	S
1016Rule Menominee	1966	only	-	Apr	lastSun	2:00	1:00	D
1017Rule Menominee	1966	only	-	Oct	lastSun	2:00	0	S
1018# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1019Zone America/Menominee	-5:50:27 -	LMT	1885 Sep 18 12:00
1020			-6:00	US	C%sT	1946
1021			-6:00 Menominee	C%sT	1969 Apr 27  2:00
1022			-5:00	-	EST	1973 Apr 29  2:00
1023			-6:00	US	C%sT
1024
1025# Navassa
1026# administered by the US Fish and Wildlife Service
1027# claimed by US under the provisions of the 1856 Guano Islands Act
1028# also claimed by Haiti
1029# occupied 1857/1900 by the Navassa Phosphate Co
1030# US lighthouse 1917/1996-09
1031# currently uninhabited
1032# see Mark Fineman, "An Isle Rich in Guano and Discord",
1033# _Los Angeles Times_ (1998-11-10), A1, A10; it cites
1034# Jimmy Skaggs, _The Great Guano Rush_ (1994).
1035
1036################################################################################
1037
1038
1039# From Paul Eggert (2014-10-31):
1040#
1041# Unless otherwise specified, the source for data through 1990 is:
1042# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
1043# San Diego: ACS Publications, Inc. (2003).
1044# Unfortunately this book contains many errors and cites no sources.
1045#
1046# Gwillim Law writes that a good source
1047# for recent time zone data is the International Air Transport
1048# Association's Standard Schedules Information Manual (IATA SSIM),
1049# published semiannually.  Law sent in several helpful summaries
1050# of the IATA's data after 1990.  Except where otherwise noted,
1051# IATA SSIM is the source for entries after 1990.
1052#
1053# Other sources occasionally used include:
1054#
1055#	Edward W. Whitman, World Time Differences,
1056#	Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
1057#	which I found in the UCLA library.
1058#
1059#	William Willett, The Waste of Daylight, 19th edition
1060#	<http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf>
1061#	[PDF] (1914-03)
1062#
1063#	Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
1064#	<http://www.jstor.org/stable/1774359>.
1065#
1066# See the 'europe' file for Greenland.
1067
1068# Canada
1069
1070# From Alain LaBont�� (1994-11-14):
1071# I post here the time zone abbreviations standardized in Canada
1072# for both English and French in the CAN/CSA-Z234.4-89 standard....
1073#
1074#	UTC	Standard time	Daylight saving time
1075#	offset	French	English	French	English
1076#	-2:30	-	-	HAT	NDT
1077#	-3	-	-	HAA	ADT
1078#	-3:30	HNT	NST	-	-
1079#	-4	HNA	AST	HAE	EDT
1080#	-5	HNE	EST	HAC	CDT
1081#	-6	HNC	CST	HAR	MDT
1082#	-7	HNR	MST	HAP	PDT
1083#	-8	HNP	PST	HAY	YDT
1084#	-9	HNY	YST	-	-
1085#
1086#	HN: Heure Normale	ST: Standard Time
1087#	HA: Heure Avanc��e	DT: Daylight saving Time
1088#
1089#	A: de l'Atlantique	Atlantic
1090#	C: du Centre		Central
1091#	E: de l'Est		Eastern
1092#	M:			Mountain
1093#	N:			Newfoundland
1094#	P: du Pacifique		Pacific
1095#	R: des Rocheuses
1096#	T: de Terre-Neuve
1097#	Y: du Yukon		Yukon
1098#
1099# From Paul Eggert (1994-11-22):
1100# Alas, this sort of thing must be handled by localization software.
1101
1102# Unless otherwise specified, the data entries for Canada are all from Shanks
1103# & Pottenger.
1104
1105# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31,
1106# 2007-03-01):
1107# The British Columbia government announced yesterday that it will
1108# adjust daylight savings next year to align with changes in the
1109# U.S. and the rest of Canada....
1110# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm
1111# ...
1112# Nova Scotia
1113# Daylight saving time will be extended by four weeks starting in 2007....
1114# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf
1115#
1116# [For New Brunswick] the new legislation dictates that the time change is to
1117# be done at 02:00 instead of 00:01.
1118# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf
1119# ...
1120# Manitoba has traditionally changed the clock every fall at 03:00.
1121# As of 2006, the transition is to take place one hour earlier at 02:00.
1122# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php
1123# ...
1124# [Alberta, Ontario, Quebec] will follow US rules.
1125# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM
1126# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm
1127# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF
1128# ...
1129# P.E.I. will follow US rules....
1130# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf
1131# ...
1132# Province of Newfoundland and Labrador....
1133# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm
1134# ...
1135# Yukon
1136# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf
1137# ...
1138# N.W.T. will follow US rules.  Whoever maintains the government web site
1139# does not seem to believe in bookmarks.  To see the news release, click the
1140# following link and search for "Daylight Savings Time Change".  Press the
1141# "Daylight Savings Time Change" link; it will fire off a popup using
1142# JavaScript.
1143# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive
1144# ...
1145# Nunavut
1146# An amendment to the Interpretation Act was registered on February 19/2007....
1147# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf
1148
1149# From Paul Eggert (2014-10-18):
1150# H. David Matthews and Mary Vincent's map
1151# "It's about TIME", _Canadian Geographic_ (September-October 1998)
1152# http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp
1153# contains detailed boundaries for regions observing nonstandard
1154# time and daylight saving time arrangements in Canada circa 1998.
1155#
1156# National Research Council Canada maintains info about time zones and DST.
1157# http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html
1158# http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5
1159# Its unofficial information is often taken from Matthews and Vincent.
1160
1161# From Paul Eggert (2006-06-27):
1162# For now, assume all of DST-observing Canada will fall into line with the
1163# new US DST rules,
1164
1165# From Chris Walton (2011-12-01)
1166# In the first of Tammy Hardwick's articles
1167# http://www.ilovecreston.com/?p=articles&t=spec&ar=260
1168# she quotes the Friday November 1/1918 edition of the Creston Review.
1169# The quote includes these two statements:
1170# 'Sunday the CPR went back to the old system of time...'
1171# '... The daylight saving scheme was dropped all over Canada at the same time,'
1172# These statements refer to a transition from daylight time to standard time
1173# that occurred nationally on Sunday October 27/1918.  This transition was
1174# also documented in the Saturday October 26/1918 edition of the Toronto Star.
1175
1176# In light of that evidence, we alter the date from the earlier believed
1177# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day
1178# than Thursday) in all Canadian rulesets.
1179
1180# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1181Rule	Canada	1918	only	-	Apr	14	2:00	1:00	D
1182Rule	Canada	1918	only	-	Oct	27	2:00	0	S
1183Rule	Canada	1942	only	-	Feb	 9	2:00	1:00	W # War
1184Rule	Canada	1945	only	-	Aug	14	23:00u	1:00	P # Peace
1185Rule	Canada	1945	only	-	Sep	30	2:00	0	S
1186Rule	Canada	1974	1986	-	Apr	lastSun	2:00	1:00	D
1187Rule	Canada	1974	2006	-	Oct	lastSun	2:00	0	S
1188Rule	Canada	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
1189Rule	Canada	2007	max	-	Mar	Sun>=8	2:00	1:00	D
1190Rule	Canada	2007	max	-	Nov	Sun>=1	2:00	0	S
1191
1192
1193# Newfoundland and Labrador
1194
1195# From Paul Eggert (2000-10-02):
1196# Matthews and Vincent (1998) write that Labrador should use NST/NDT,
1197# but the only part of Labrador that follows the rules is the
1198# southeast corner, including Port Hope Simpson and Mary's Harbour,
1199# but excluding, say, Black Tickle.
1200
1201# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1202Rule	StJohns	1917	only	-	Apr	 8	2:00	1:00	D
1203Rule	StJohns	1917	only	-	Sep	17	2:00	0	S
1204# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger.
1205Rule	StJohns	1919	only	-	May	 5	23:00	1:00	D
1206Rule	StJohns	1919	only	-	Aug	12	23:00	0	S
1207# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger.
1208Rule	StJohns	1920	1935	-	May	Sun>=1	23:00	1:00	D
1209Rule	StJohns	1920	1935	-	Oct	lastSun	23:00	0	S
1210# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks &
1211# Pottenger.
1212Rule	StJohns	1936	1941	-	May	Mon>=9	0:00	1:00	D
1213Rule	StJohns	1936	1941	-	Oct	Mon>=2	0:00	0	S
1214# Whitman gives the following transitions:
1215# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07
1216# but go with Shanks & Pottenger and assume they used Canadian rules.
1217# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
1218# Apr 30 - Sep 24; go with Shanks & Pottenger.
1219Rule	StJohns	1946	1950	-	May	Sun>=8	2:00	1:00	D
1220Rule	StJohns	1946	1950	-	Oct	Sun>=2	2:00	0	S
1221Rule	StJohns	1951	1986	-	Apr	lastSun	2:00	1:00	D
1222Rule	StJohns	1951	1959	-	Sep	lastSun	2:00	0	S
1223Rule	StJohns	1960	1986	-	Oct	lastSun	2:00	0	S
1224# From Paul Eggert (2000-10-02):
1225# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
1226# at 00:01 local time.  For now, assume it started in 1987.
1227
1228# From Michael Pelley (2011-09-12):
1229# We received today, Monday, September 12, 2011, notification that the
1230# changes to the Newfoundland Standard Time Act have been proclaimed.
1231# The change in the Act stipulates that the change from Daylight Savings
1232# Time to Standard Time and from Standard Time to Daylight Savings Time
1233# now occurs at 2:00AM.
1234# ...
1235# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm
1236# ...
1237# MICHAEL PELLEY  |  Manager of Enterprise Architecture - Solution Delivery
1238# Office of the Chief Information Officer
1239# Executive Council
1240# Government of Newfoundland & Labrador
1241
1242Rule	StJohns	1987	only	-	Apr	Sun>=1	0:01	1:00	D
1243Rule	StJohns	1987	2006	-	Oct	lastSun	0:01	0	S
1244Rule	StJohns	1988	only	-	Apr	Sun>=1	0:01	2:00	DD
1245Rule	StJohns	1989	2006	-	Apr	Sun>=1	0:01	1:00	D
1246Rule	StJohns	2007	2011	-	Mar	Sun>=8	0:01	1:00	D
1247Rule	StJohns	2007	2010	-	Nov	Sun>=1	0:01	0	S
1248#
1249# St John's has an apostrophe, but Posix file names can't have apostrophes.
1250# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1251Zone America/St_Johns	-3:30:52 -	LMT	1884
1252			-3:30:52 StJohns N%sT	1918
1253			-3:30:52 Canada	N%sT	1919
1254			-3:30:52 StJohns N%sT	1935 Mar 30
1255			-3:30	StJohns	N%sT	1942 May 11
1256			-3:30	Canada	N%sT	1946
1257			-3:30	StJohns	N%sT	2011 Nov
1258			-3:30	Canada	N%sT
1259
1260# most of east Labrador
1261
1262# The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'.
1263# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1264Zone America/Goose_Bay	-4:01:40 -	LMT	1884 # Happy Valley-Goose Bay
1265			-3:30:52 -	NST	1918
1266			-3:30:52 Canada N%sT	1919
1267			-3:30:52 -	NST	1935 Mar 30
1268			-3:30	-	NST	1936
1269			-3:30	StJohns	N%sT	1942 May 11
1270			-3:30	Canada	N%sT	1946
1271			-3:30	StJohns	N%sT	1966 Mar 15  2:00
1272			-4:00	StJohns	A%sT	2011 Nov
1273			-4:00	Canada	A%sT
1274
1275
1276# west Labrador, Nova Scotia, Prince Edward I
1277
1278# From Brian Inglis (2015-07-20):
1279# From the historical weather station records available at:
1280# https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada
1281# Sydney shares the same time history as Glace Bay, so was
1282# likely to be the same across the island....
1283# Sydney, as the capital and most populous location, or Cape Breton, would
1284# have been better names for the zone had we known this in 1996.
1285
1286# From Paul Eggert (2015-07-20):
1287# Shanks & Pottenger write that since 1970 most of this region has been like
1288# Halifax.  Many locales did not observe peacetime DST until 1972;
1289# the Cape Breton area, represented by Glace Bay, is the largest we know of
1290# (Glace Bay was perhaps not the best name choice but no point changing now).
1291# Shanks & Pottenger also write that Liverpool, NS was the only town
1292# in Canada to observe DST in 1971 but not 1970; for now we'll assume
1293# this is a typo.
1294
1295# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1296Rule	Halifax	1916	only	-	Apr	 1	0:00	1:00	D
1297Rule	Halifax	1916	only	-	Oct	 1	0:00	0	S
1298Rule	Halifax	1920	only	-	May	 9	0:00	1:00	D
1299Rule	Halifax	1920	only	-	Aug	29	0:00	0	S
1300Rule	Halifax	1921	only	-	May	 6	0:00	1:00	D
1301Rule	Halifax	1921	1922	-	Sep	 5	0:00	0	S
1302Rule	Halifax	1922	only	-	Apr	30	0:00	1:00	D
1303Rule	Halifax	1923	1925	-	May	Sun>=1	0:00	1:00	D
1304Rule	Halifax	1923	only	-	Sep	 4	0:00	0	S
1305Rule	Halifax	1924	only	-	Sep	15	0:00	0	S
1306Rule	Halifax	1925	only	-	Sep	28	0:00	0	S
1307Rule	Halifax	1926	only	-	May	16	0:00	1:00	D
1308Rule	Halifax	1926	only	-	Sep	13	0:00	0	S
1309Rule	Halifax	1927	only	-	May	 1	0:00	1:00	D
1310Rule	Halifax	1927	only	-	Sep	26	0:00	0	S
1311Rule	Halifax	1928	1931	-	May	Sun>=8	0:00	1:00	D
1312Rule	Halifax	1928	only	-	Sep	 9	0:00	0	S
1313Rule	Halifax	1929	only	-	Sep	 3	0:00	0	S
1314Rule	Halifax	1930	only	-	Sep	15	0:00	0	S
1315Rule	Halifax	1931	1932	-	Sep	Mon>=24	0:00	0	S
1316Rule	Halifax	1932	only	-	May	 1	0:00	1:00	D
1317Rule	Halifax	1933	only	-	Apr	30	0:00	1:00	D
1318Rule	Halifax	1933	only	-	Oct	 2	0:00	0	S
1319Rule	Halifax	1934	only	-	May	20	0:00	1:00	D
1320Rule	Halifax	1934	only	-	Sep	16	0:00	0	S
1321Rule	Halifax	1935	only	-	Jun	 2	0:00	1:00	D
1322Rule	Halifax	1935	only	-	Sep	30	0:00	0	S
1323Rule	Halifax	1936	only	-	Jun	 1	0:00	1:00	D
1324Rule	Halifax	1936	only	-	Sep	14	0:00	0	S
1325Rule	Halifax	1937	1938	-	May	Sun>=1	0:00	1:00	D
1326Rule	Halifax	1937	1941	-	Sep	Mon>=24	0:00	0	S
1327Rule	Halifax	1939	only	-	May	28	0:00	1:00	D
1328Rule	Halifax	1940	1941	-	May	Sun>=1	0:00	1:00	D
1329Rule	Halifax	1946	1949	-	Apr	lastSun	2:00	1:00	D
1330Rule	Halifax	1946	1949	-	Sep	lastSun	2:00	0	S
1331Rule	Halifax	1951	1954	-	Apr	lastSun	2:00	1:00	D
1332Rule	Halifax	1951	1954	-	Sep	lastSun	2:00	0	S
1333Rule	Halifax	1956	1959	-	Apr	lastSun	2:00	1:00	D
1334Rule	Halifax	1956	1959	-	Sep	lastSun	2:00	0	S
1335Rule	Halifax	1962	1973	-	Apr	lastSun	2:00	1:00	D
1336Rule	Halifax	1962	1973	-	Oct	lastSun	2:00	0	S
1337# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1338Zone America/Halifax	-4:14:24 -	LMT	1902 Jun 15
1339			-4:00	Halifax	A%sT	1918
1340			-4:00	Canada	A%sT	1919
1341			-4:00	Halifax	A%sT	1942 Feb  9  2:00s
1342			-4:00	Canada	A%sT	1946
1343			-4:00	Halifax	A%sT	1974
1344			-4:00	Canada	A%sT
1345Zone America/Glace_Bay	-3:59:48 -	LMT	1902 Jun 15
1346			-4:00	Canada	A%sT	1953
1347			-4:00	Halifax	A%sT	1954
1348			-4:00	-	AST	1972
1349			-4:00	Halifax	A%sT	1974
1350			-4:00	Canada	A%sT
1351
1352# New Brunswick
1353
1354# From Paul Eggert (2007-01-31):
1355# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>
1356# says they changed at 00:01 through 2006, and
1357# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
1358# clear that this was the case since at least 1993.
1359# For now, assume it started in 1993.
1360
1361# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1362Rule	Moncton	1933	1935	-	Jun	Sun>=8	1:00	1:00	D
1363Rule	Moncton	1933	1935	-	Sep	Sun>=8	1:00	0	S
1364Rule	Moncton	1936	1938	-	Jun	Sun>=1	1:00	1:00	D
1365Rule	Moncton	1936	1938	-	Sep	Sun>=1	1:00	0	S
1366Rule	Moncton	1939	only	-	May	27	1:00	1:00	D
1367Rule	Moncton	1939	1941	-	Sep	Sat>=21	1:00	0	S
1368Rule	Moncton	1940	only	-	May	19	1:00	1:00	D
1369Rule	Moncton	1941	only	-	May	 4	1:00	1:00	D
1370Rule	Moncton	1946	1972	-	Apr	lastSun	2:00	1:00	D
1371Rule	Moncton	1946	1956	-	Sep	lastSun	2:00	0	S
1372Rule	Moncton	1957	1972	-	Oct	lastSun	2:00	0	S
1373Rule	Moncton	1993	2006	-	Apr	Sun>=1	0:01	1:00	D
1374Rule	Moncton	1993	2006	-	Oct	lastSun	0:01	0	S
1375# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1376Zone America/Moncton	-4:19:08 -	LMT	1883 Dec  9
1377			-5:00	-	EST	1902 Jun 15
1378			-4:00	Canada	A%sT	1933
1379			-4:00	Moncton	A%sT	1942
1380			-4:00	Canada	A%sT	1946
1381			-4:00	Moncton	A%sT	1973
1382			-4:00	Canada	A%sT	1993
1383			-4:00	Moncton	A%sT	2007
1384			-4:00	Canada	A%sT
1385
1386# Quebec
1387
1388# From Paul Eggert (2015-03-24):
1389# See America/Toronto for most of Quebec, including Montreal.
1390#
1391# Matthews and Vincent (1998) also write that Quebec east of the -63
1392# meridian is supposed to observe AST, but residents as far east as
1393# Natashquan use EST/EDT, and residents east of Natashquan use AST.
1394# The Quebec department of justice writes in
1395# "The situation in Minganie and Basse-C��te-Nord"
1396# http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm
1397# that the coastal strip from just east of Natashquan to Blanc-Sablon
1398# observes Atlantic standard time all year round.
1399# http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en
1400# says this common practice was codified into law as of 2007.
1401# For lack of better info, guess this practice began around 1970, contra to
1402# Shanks & Pottenger who have this region observing AST/ADT.
1403
1404# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1405Zone America/Blanc-Sablon -3:48:28 -	LMT	1884
1406			-4:00	Canada	A%sT	1970
1407			-4:00	-	AST
1408
1409# Ontario
1410
1411# From Paul Eggert (2006-07-09):
1412# Shanks & Pottenger write that since 1970 most of Ontario has been like
1413# Toronto.
1414# Thunder Bay skipped DST in 1973.
1415# Many smaller locales did not observe peacetime DST until 1974;
1416# Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1417# Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
1418
1419# From Mark Brader (2003-07-26):
1420# [According to the Toronto Star] Orillia, Ontario, adopted DST
1421# effective Saturday, 1912-06-22, 22:00; the article mentions that
1422# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
1423# have already done so.  In Orillia DST was to run until Saturday,
1424# 1912-08-31 (no time mentioned), but it was met with considerable
1425# hostility from certain segments of the public, and was revoked after
1426# only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but
1427# presumably that should be -07-06.  (1912-06-19, -07-12; also letters
1428# earlier in June).
1429#
1430# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).
1431
1432# From Paul Eggert (1997-10-17):
1433# Mark Brader writes that an article in the 1997-10-14 Toronto Star
1434# says that Atikokan, Ontario currently does not observe DST,
1435# but will vote on 11-10 whether to use EST/EDT.
1436# He also writes that the Ontario Time Act (1990, Chapter T.9)
1437# http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html
1438# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.
1439# Officially Atikokan is therefore on CST/CDT, and most likely this report
1440# concerns a non-official time observed as a matter of local practice.
1441#
1442# From Paul Eggert (2000-10-02):
1443# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and
1444# New Osnaburgh observe CST all year, that Big Trout Lake observes
1445# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in
1446# violation of the official Ontario rules.
1447#
1448# From Paul Eggert (2006-07-09):
1449# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the
1450# 2005-07-21 Chronicle-Journal, which said:
1451#
1452#	The clocks in Atikokan stay set on standard time year-round.
1453#	This means they spend about half the time on central time and
1454#	the other half on eastern time.
1455#
1456#	For the most part, the system works, Mayor Dennis Brown said.
1457#
1458#	"The majority of businesses in Atikokan deal more with Eastern
1459#	Canada, but there are some that deal with Western Canada," he
1460#	said.  "I don't see any changes happening here."
1461#
1462# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang
1463# [New Osnaburgh] follow the same practice."
1464
1465# From Garry McKinnon (2006-07-14) via Chris Walton:
1466# I chatted with a member of my board who has an outstanding memory
1467# and a long history in Atikokan (and in the telecom industry) and he
1468# can say for certain that Atikokan has been practicing the current
1469# time keeping since 1952, at least.
1470
1471# From Paul Eggert (2006-07-17):
1472# Shanks & Pottenger say that Atikokan has agreed with Rainy River
1473# ever since standard time was introduced, but the information from
1474# McKinnon sounds more authoritative.  For now, assume that Atikokan
1475# switched to EST immediately after WWII era daylight saving time
1476# ended.  This matches the old (less-populous) America/Coral_Harbour
1477# entry since our cutoff date of 1970, so we can move
1478# America/Coral_Harbour to the 'backward' file.
1479
1480# From Mark Brader (2010-03-06):
1481#
1482# Currently the database has:
1483#
1484# # Ontario
1485#
1486# # From Paul Eggert (2006-07-09):
1487# # Shanks & Pottenger write that since 1970 most of Ontario has been like
1488# # Toronto.
1489# # Thunder Bay skipped DST in 1973.
1490# # Many smaller locales did not observe peacetime DST until 1974;
1491# # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1492#
1493# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom
1494# right corner of page 1, it says that Toronto will return to standard
1495# time at 2 am Sunday morning (which agrees with the database), and that:
1496#
1497#     The one-hour setback will go into effect throughout most of Ontario,
1498#     except in areas like Windsor which remains on standard time all year.
1499#
1500# Windsor is, of course, a lot larger than Nipigon.
1501#
1502# I only came across this incidentally.  I don't know if Windsor began
1503# observing DST when Detroit did, or in 1974, or on some other date.
1504#
1505# By the way, the article continues by noting that:
1506#
1507#     Some cities in the United States have pushed the deadline back
1508#     three weeks and will change over from daylight saving in October.
1509
1510# From Arthur David Olson (2010-07-17):
1511#
1512# "Standard Time and Time Zones in Canada" appeared in
1513# The Journal of The Royal Astronomical Society of Canada,
1514# volume 26, number 2 (February 1932) and, as of 2010-07-17,
1515# was available at
1516# http://adsabs.harvard.edu/full/1932JRASC..26...49S
1517#
1518# It includes the text below (starting on page 57):
1519#
1520#   A list of the places in Canada using daylight saving time would
1521# require yearly revision. From information kindly furnished by
1522# the provincial governments and by the postmasters in many cities
1523# and towns, it is found that the following places used daylight sav-
1524# ing in 1930. The information for the province of Quebec is definite,
1525# for the other provinces only approximate:
1526#
1527#	Province	Daylight saving time used
1528# Prince Edward Island	Not used.
1529# Nova Scotia		In Halifax only.
1530# New Brunswick		In St. John only.
1531# Quebec		In the following places:
1532#			Montreal	Lachine
1533#			Quebec		Mont-Royal
1534#			L��vis		Iberville
1535#			St. Lambert	Cap de la Madel��ine
1536#			Verdun		Loretteville
1537#			Westmount	Richmond
1538#			Outremont	St. J��r��me
1539#			Longueuil	Greenfield Park
1540#			Arvida		Waterloo
1541#			Chambly-Canton	Beaulieu
1542#			Melbourne	La Tuque
1543#			St. Th��ophile	Buckingham
1544# Ontario		Used generally in the cities and towns along
1545#			the southerly part of the province. Not
1546#			used in the northwesterly part.
1547# Manitoba		Not used.
1548# Saskatchewan		In Regina only.
1549# Alberta		Not used.
1550# British Columbia	Not used.
1551#
1552#   With some exceptions, the use of daylight saving may be said to be limited
1553# to those cities and towns lying between Quebec city and Windsor, Ont.
1554
1555# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1556Rule	Toronto	1919	only	-	Mar	30	23:30	1:00	D
1557Rule	Toronto	1919	only	-	Oct	26	0:00	0	S
1558Rule	Toronto	1920	only	-	May	 2	2:00	1:00	D
1559Rule	Toronto	1920	only	-	Sep	26	0:00	0	S
1560Rule	Toronto	1921	only	-	May	15	2:00	1:00	D
1561Rule	Toronto	1921	only	-	Sep	15	2:00	0	S
1562Rule	Toronto	1922	1923	-	May	Sun>=8	2:00	1:00	D
1563# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
1564# was meant.
1565Rule	Toronto	1922	1926	-	Sep	Sun>=15	2:00	0	S
1566Rule	Toronto	1924	1927	-	May	Sun>=1	2:00	1:00	D
1567# The 1927-to-1939 rules can be expressed more simply as
1568# Rule	Toronto	1927	1937	-	Sep	Sun>=25	2:00	0	S
1569# Rule	Toronto	1928	1937	-	Apr	Sun>=25	2:00	1:00	D
1570# Rule	Toronto	1938	1940	-	Apr	lastSun	2:00	1:00	D
1571# Rule	Toronto	1938	1939	-	Sep	lastSun	2:00	0	S
1572# The rules below avoid use of Sun>=25
1573# (which pre-2004 versions of zic cannot handle).
1574Rule	Toronto	1927	1932	-	Sep	lastSun	2:00	0	S
1575Rule	Toronto	1928	1931	-	Apr	lastSun	2:00	1:00	D
1576Rule	Toronto	1932	only	-	May	1	2:00	1:00	D
1577Rule	Toronto	1933	1940	-	Apr	lastSun	2:00	1:00	D
1578Rule	Toronto	1933	only	-	Oct	1	2:00	0	S
1579Rule	Toronto	1934	1939	-	Sep	lastSun	2:00	0	S
1580Rule	Toronto	1945	1946	-	Sep	lastSun	2:00	0	S
1581Rule	Toronto	1946	only	-	Apr	lastSun	2:00	1:00	D
1582Rule	Toronto	1947	1949	-	Apr	lastSun	0:00	1:00	D
1583Rule	Toronto	1947	1948	-	Sep	lastSun	0:00	0	S
1584Rule	Toronto	1949	only	-	Nov	lastSun	0:00	0	S
1585Rule	Toronto	1950	1973	-	Apr	lastSun	2:00	1:00	D
1586Rule	Toronto	1950	only	-	Nov	lastSun	2:00	0	S
1587Rule	Toronto	1951	1956	-	Sep	lastSun	2:00	0	S
1588# Shanks & Pottenger say Toronto ended DST a week early in 1971,
1589# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this
1590# is wrong, and that he had confirmed it by checking the 1971-10-30
1591# Toronto Star, which said that DST was ending 1971-10-31 as usual.
1592Rule	Toronto	1957	1973	-	Oct	lastSun	2:00	0	S
1593
1594# From Paul Eggert (2003-07-27):
1595# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and
1596# Port Arthur, Ontario, the principle of the Bill has been in
1597# operation for the past three years, and in the City of Moose Jaw,
1598# Saskatchewan, for one year."
1599
1600# From David Bryan via Tory Tronrud, Director/Curator,
1601# Thunder Bay Museum (2003-11-12):
1602# There is some suggestion, however, that, by-law or not, daylight
1603# savings time was being practiced in Fort William and Port Arthur
1604# before 1909.... [I]n 1910, the line between the Eastern and Central
1605# Time Zones was permanently moved about two hundred miles west to
1606# include the Thunder Bay area....  When Canada adopted daylight
1607# savings time in 1916, Fort William and Port Arthur, having done so
1608# already, did not change their clocks....  During the Second World
1609# War,... [t]he cities agreed to implement DST during the summer
1610# months for the remainder of the war years.
1611
1612# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1613Zone America/Toronto	-5:17:32 -	LMT	1895
1614			-5:00	Canada	E%sT	1919
1615			-5:00	Toronto	E%sT	1942 Feb  9  2:00s
1616			-5:00	Canada	E%sT	1946
1617			-5:00	Toronto	E%sT	1974
1618			-5:00	Canada	E%sT
1619Zone America/Thunder_Bay -5:57:00 -	LMT	1895
1620			-6:00	-	CST	1910
1621			-5:00	-	EST	1942
1622			-5:00	Canada	E%sT	1970
1623			-5:00	Toronto	E%sT	1973
1624			-5:00	-	EST	1974
1625			-5:00	Canada	E%sT
1626Zone America/Nipigon	-5:53:04 -	LMT	1895
1627			-5:00	Canada	E%sT	1940 Sep 29
1628			-5:00	1:00	EDT	1942 Feb  9  2:00s
1629			-5:00	Canada	E%sT
1630Zone America/Rainy_River -6:18:16 -	LMT	1895
1631			-6:00	Canada	C%sT	1940 Sep 29
1632			-6:00	1:00	CDT	1942 Feb  9  2:00s
1633			-6:00	Canada	C%sT
1634Zone America/Atikokan	-6:06:28 -	LMT	1895
1635			-6:00	Canada	C%sT	1940 Sep 29
1636			-6:00	1:00	CDT	1942 Feb  9  2:00s
1637			-6:00	Canada	C%sT	1945 Sep 30  2:00
1638			-5:00	-	EST
1639
1640
1641# Manitoba
1642
1643# From Rob Douglas (2006-04-06):
1644# the old Manitoba Time Act - as amended by Bill 2, assented to
1645# March 27, 1987 ... said ...
1646# "between two o'clock Central Standard Time in the morning of
1647# the first Sunday of April of each year and two o'clock Central
1648# Standard Time in the morning of the last Sunday of October next
1649# following, one hour in advance of Central Standard Time."...
1650# I believe that the English legislation [of the old time act] had
1651# been assented to (March 22, 1967)....
1652# Also, as far as I can tell, there was no order-in-council varying
1653# the time of Daylight Saving Time for 2005 and so the provisions of
1654# the 1987 version would apply - the changeover was at 2:00 Central
1655# Standard Time (i.e. not until 3:00 Central Daylight Time).
1656
1657# From Paul Eggert (2006-04-10):
1658# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s)
1659# starting 1966.  Since 02:00s is clearly correct for 1967 on, assume
1660# it was also 02:00s in 1966.
1661
1662# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1663Rule	Winn	1916	only	-	Apr	23	0:00	1:00	D
1664Rule	Winn	1916	only	-	Sep	17	0:00	0	S
1665Rule	Winn	1918	only	-	Apr	14	2:00	1:00	D
1666Rule	Winn	1918	only	-	Oct	27	2:00	0	S
1667Rule	Winn	1937	only	-	May	16	2:00	1:00	D
1668Rule	Winn	1937	only	-	Sep	26	2:00	0	S
1669Rule	Winn	1942	only	-	Feb	 9	2:00	1:00	W # War
1670Rule	Winn	1945	only	-	Aug	14	23:00u	1:00	P # Peace
1671Rule	Winn	1945	only	-	Sep	lastSun	2:00	0	S
1672Rule	Winn	1946	only	-	May	12	2:00	1:00	D
1673Rule	Winn	1946	only	-	Oct	13	2:00	0	S
1674Rule	Winn	1947	1949	-	Apr	lastSun	2:00	1:00	D
1675Rule	Winn	1947	1949	-	Sep	lastSun	2:00	0	S
1676Rule	Winn	1950	only	-	May	 1	2:00	1:00	D
1677Rule	Winn	1950	only	-	Sep	30	2:00	0	S
1678Rule	Winn	1951	1960	-	Apr	lastSun	2:00	1:00	D
1679Rule	Winn	1951	1958	-	Sep	lastSun	2:00	0	S
1680Rule	Winn	1959	only	-	Oct	lastSun	2:00	0	S
1681Rule	Winn	1960	only	-	Sep	lastSun	2:00	0	S
1682Rule	Winn	1963	only	-	Apr	lastSun	2:00	1:00	D
1683Rule	Winn	1963	only	-	Sep	22	2:00	0	S
1684Rule	Winn	1966	1986	-	Apr	lastSun	2:00s	1:00	D
1685Rule	Winn	1966	2005	-	Oct	lastSun	2:00s	0	S
1686Rule	Winn	1987	2005	-	Apr	Sun>=1	2:00s	1:00	D
1687# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1688Zone America/Winnipeg	-6:28:36 -	LMT	1887 Jul 16
1689			-6:00	Winn	C%sT	2006
1690			-6:00	Canada	C%sT
1691
1692
1693# Saskatchewan
1694
1695# From Mark Brader (2003-07-26):
1696# The first actual adoption of DST in Canada was at the municipal
1697# level.  As the [Toronto] Star put it (1912-06-07), "While people
1698# elsewhere have long been talking of legislation to save daylight,
1699# the city of Moose Jaw [Saskatchewan] has acted on its own hook."
1700# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
1701# presumably late evening, as below), and would run until "the end of
1702# the summer".  The discrepancy between municipal time and railroad
1703# time was noted.
1704
1705# From Paul Eggert (2003-07-27):
1706# Willett (1914-03) notes that DST "has been in operation ... in the
1707# City of Moose Jaw, Saskatchewan, for one year."
1708
1709# From Paul Eggert (2006-03-22):
1710# Shanks & Pottenger say that since 1970 this region has mostly been as Regina.
1711# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
1712# Other western towns (e.g. Lloydminster) are like Edmonton.
1713# Matthews and Vincent (1998) write that Denare Beach and Creighton
1714# are like Winnipeg, in violation of Saskatchewan law.
1715
1716# From W. Jones (1992-11-06):
1717# The. . .below is based on information I got from our law library, the
1718# provincial archives, and the provincial Community Services department.
1719# A precise history would require digging through newspaper archives, and
1720# since you didn't say what you wanted, I didn't bother.
1721#
1722# Saskatchewan is split by a time zone meridian (105W) and over the years
1723# the boundary became pretty ragged as communities near it reevaluated
1724# their affiliations in one direction or the other.  In 1965 a provincial
1725# referendum favoured legislating common time practices.
1726#
1727# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
1728# Saskatchewan 1978) was proclaimed, and established that the eastern
1729# part of Saskatchewan would use CST year round, that districts in
1730# northwest Saskatchewan would by default follow CST but could opt to
1731# follow Mountain Time rules (thus 1 hour difference in the winter and
1732# zero in the summer), and that districts in southwest Saskatchewan would
1733# by default follow MT but could opt to follow CST.
1734#
1735# It took a few years for the dust to settle (I know one story of a town
1736# on one time zone having its school in another, such that a mom had to
1737# serve her family lunch in two shifts), but presently it seems that only
1738# a few towns on the border with Alberta (e.g. Lloydminster) follow MT
1739# rules any more; all other districts appear to have used CST year round
1740# since sometime in the 1960s.
1741
1742# From Chris Walton (2006-06-26):
1743# The Saskatchewan time act which was last updated in 1996 is about 30 pages
1744# long and rather painful to read.
1745# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf
1746
1747# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1748Rule	Regina	1918	only	-	Apr	14	2:00	1:00	D
1749Rule	Regina	1918	only	-	Oct	27	2:00	0	S
1750Rule	Regina	1930	1934	-	May	Sun>=1	0:00	1:00	D
1751Rule	Regina	1930	1934	-	Oct	Sun>=1	0:00	0	S
1752Rule	Regina	1937	1941	-	Apr	Sun>=8	0:00	1:00	D
1753Rule	Regina	1937	only	-	Oct	Sun>=8	0:00	0	S
1754Rule	Regina	1938	only	-	Oct	Sun>=1	0:00	0	S
1755Rule	Regina	1939	1941	-	Oct	Sun>=8	0:00	0	S
1756Rule	Regina	1942	only	-	Feb	 9	2:00	1:00	W # War
1757Rule	Regina	1945	only	-	Aug	14	23:00u	1:00	P # Peace
1758Rule	Regina	1945	only	-	Sep	lastSun	2:00	0	S
1759Rule	Regina	1946	only	-	Apr	Sun>=8	2:00	1:00	D
1760Rule	Regina	1946	only	-	Oct	Sun>=8	2:00	0	S
1761Rule	Regina	1947	1957	-	Apr	lastSun	2:00	1:00	D
1762Rule	Regina	1947	1957	-	Sep	lastSun	2:00	0	S
1763Rule	Regina	1959	only	-	Apr	lastSun	2:00	1:00	D
1764Rule	Regina	1959	only	-	Oct	lastSun	2:00	0	S
1765#
1766Rule	Swift	1957	only	-	Apr	lastSun	2:00	1:00	D
1767Rule	Swift	1957	only	-	Oct	lastSun	2:00	0	S
1768Rule	Swift	1959	1961	-	Apr	lastSun	2:00	1:00	D
1769Rule	Swift	1959	only	-	Oct	lastSun	2:00	0	S
1770Rule	Swift	1960	1961	-	Sep	lastSun	2:00	0	S
1771# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1772Zone America/Regina	-6:58:36 -	LMT	1905 Sep
1773			-7:00	Regina	M%sT	1960 Apr lastSun  2:00
1774			-6:00	-	CST
1775Zone America/Swift_Current -7:11:20 -	LMT	1905 Sep
1776			-7:00	Canada	M%sT	1946 Apr lastSun  2:00
1777			-7:00	Regina	M%sT	1950
1778			-7:00	Swift	M%sT	1972 Apr lastSun  2:00
1779			-6:00	-	CST
1780
1781
1782# Alberta
1783
1784# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1785Rule	Edm	1918	1919	-	Apr	Sun>=8	2:00	1:00	D
1786Rule	Edm	1918	only	-	Oct	27	2:00	0	S
1787Rule	Edm	1919	only	-	May	27	2:00	0	S
1788Rule	Edm	1920	1923	-	Apr	lastSun	2:00	1:00	D
1789Rule	Edm	1920	only	-	Oct	lastSun	2:00	0	S
1790Rule	Edm	1921	1923	-	Sep	lastSun	2:00	0	S
1791Rule	Edm	1942	only	-	Feb	 9	2:00	1:00	W # War
1792Rule	Edm	1945	only	-	Aug	14	23:00u	1:00	P # Peace
1793Rule	Edm	1945	only	-	Sep	lastSun	2:00	0	S
1794Rule	Edm	1947	only	-	Apr	lastSun	2:00	1:00	D
1795Rule	Edm	1947	only	-	Sep	lastSun	2:00	0	S
1796Rule	Edm	1967	only	-	Apr	lastSun	2:00	1:00	D
1797Rule	Edm	1967	only	-	Oct	lastSun	2:00	0	S
1798Rule	Edm	1969	only	-	Apr	lastSun	2:00	1:00	D
1799Rule	Edm	1969	only	-	Oct	lastSun	2:00	0	S
1800Rule	Edm	1972	1986	-	Apr	lastSun	2:00	1:00	D
1801Rule	Edm	1972	2006	-	Oct	lastSun	2:00	0	S
1802# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1803Zone America/Edmonton	-7:33:52 -	LMT	1906 Sep
1804			-7:00	Edm	M%sT	1987
1805			-7:00	Canada	M%sT
1806
1807
1808# British Columbia
1809
1810# From Paul Eggert (2006-03-22):
1811# Shanks & Pottenger write that since 1970 most of this region has
1812# been like Vancouver.
1813# Dawson Creek uses MST.  Much of east BC is like Edmonton.
1814# Matthews and Vincent (1998) write that Creston is like Dawson Creek.
1815
1816# It seems though that (re: Creston) is not entirely correct:
1817
1818# From Chris Walton (2011-12-01):
1819# There are two areas within the Canadian province of British Columbia
1820# that do not currently observe daylight saving:
1821# a) The Creston Valley (includes the town of Creston and surrounding area)
1822# b) The eastern half of the Peace River Regional District
1823# (includes the cities of Dawson Creek and Fort St. John)
1824
1825# Earlier this year I stumbled across a detailed article about the time
1826# keeping history of Creston; it was written by Tammy Hardwick who is the
1827# manager of the Creston & District Museum. The article was written in May 2009.
1828# http://www.ilovecreston.com/?p=articles&t=spec&ar=260
1829# According to the article, Creston has not changed its clocks since June 1918.
1830# i.e. Creston has been stuck on UTC-7 for 93 years.
1831# Dawson Creek, on the other hand, changed its clocks as recently as April 1972.
1832
1833# Unfortunately the exact date for the time change in June 1918 remains
1834# unknown and will be difficult to ascertain.  I e-mailed Tammy a few months
1835# ago to ask if Sunday June 2 was a reasonable guess.  She said it was just
1836# as plausible as any other date (in June).  She also said that after writing
1837# the article she had discovered another time change in 1916; this is the
1838# subject of another article which she wrote in October 2010.
1839# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56
1840
1841# Here is a summary of the three clock change events in Creston's history:
1842# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7)
1843# Exact date unknown
1844# 2. Oct 1916: switch to Pacific Standard Time (GMT-8)
1845# Exact date in October unknown; Sunday October 1 is a reasonable guess.
1846# 3. June 1918: switch to Pacific Daylight Time (GMT-7)
1847# Exact date in June unknown; Sunday June 2 is a reasonable guess.
1848# note 1:
1849# On Oct 27/1918 when daylight saving ended in the rest of Canada,
1850# Creston did not change its clocks.
1851# note 2:
1852# During WWII when the Federal Government legislated a mandatory clock change,
1853# Creston did not oblige.
1854# note 3:
1855# There is no guarantee that Creston will remain on Mountain Standard Time
1856# (UTC-7) forever.
1857# The subject was debated at least once this year by the town Council.
1858# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html
1859
1860# During a period WWII, summer time (Daylight saying) was mandatory in Canada.
1861# In Creston, that was handled by shifting the area to PST (-8:00) then applying
1862# summer time to cause the offset to be -7:00, the same as it had been before
1863# the change.  It can be argued that the timezone abbreviation during this
1864# period should be PDT rather than MST, but that doesn't seem important enough
1865# (to anyone) to further complicate the rules.
1866
1867# The transition dates (and times) are guesses.
1868
1869# From Matt Johnson (2015-09-21):
1870# Fort Nelson, BC, Canada will cancel DST this year.  So while previously they
1871# were aligned with America/Vancouver, they're now aligned with
1872# America/Dawson_Creek.
1873# http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html
1874#
1875# From Tim Parenti (2015-09-23):
1876# This requires a new zone for the Northern Rockies Regional Municipality,
1877# America/Fort_Nelson.  The resolution of 2014-12-08 was reached following a
1878# 2014-11-15 poll with nearly 75% support.  Effectively, the municipality has
1879# been on MST (-0700) like Dawson Creek since it advanced its clocks on
1880# 2015-03-08.
1881#
1882# From Paul Eggert (2015-09-23):
1883# Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver.
1884
1885# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1886Rule	Vanc	1918	only	-	Apr	14	2:00	1:00	D
1887Rule	Vanc	1918	only	-	Oct	27	2:00	0	S
1888Rule	Vanc	1942	only	-	Feb	 9	2:00	1:00	W # War
1889Rule	Vanc	1945	only	-	Aug	14	23:00u	1:00	P # Peace
1890Rule	Vanc	1945	only	-	Sep	30	2:00	0	S
1891Rule	Vanc	1946	1986	-	Apr	lastSun	2:00	1:00	D
1892Rule	Vanc	1946	only	-	Oct	13	2:00	0	S
1893Rule	Vanc	1947	1961	-	Sep	lastSun	2:00	0	S
1894Rule	Vanc	1962	2006	-	Oct	lastSun	2:00	0	S
1895# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1896Zone America/Vancouver	-8:12:28 -	LMT	1884
1897			-8:00	Vanc	P%sT	1987
1898			-8:00	Canada	P%sT
1899Zone America/Dawson_Creek -8:00:56 -	LMT	1884
1900			-8:00	Canada	P%sT	1947
1901			-8:00	Vanc	P%sT	1972 Aug 30  2:00
1902			-7:00	-	MST
1903Zone America/Fort_Nelson	-8:10:47 -	LMT	1884
1904			-8:00	Vanc	P%sT	1946
1905			-8:00	-	PST	1947
1906			-8:00	Vanc	P%sT	1987
1907			-8:00	Canada	P%sT	2015 Mar  8  2:00
1908			-7:00	-	MST
1909Zone America/Creston	-7:46:04 -	LMT	1884
1910			-7:00	-	MST	1916 Oct 1
1911			-8:00	-	PST	1918 Jun 2
1912			-7:00	-	MST
1913
1914# Northwest Territories, Nunavut, Yukon
1915
1916# From Paul Eggert (2006-03-22):
1917# Dawson switched to PST in 1973.  Inuvik switched to MST in 1979.
1918# Mathew Englander (1996-10-07) gives the following refs:
1919#	* 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
1920#	c. 7 defines Yukon standard time as UTC-9....
1921#	see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
1922#	[http://canlii.ca/t/7vhg]
1923#	* C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
1924#	* O.I.C. 1980/02 established DST.
1925#	* O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
1926
1927# From Brian Inglis (2015-04-14):
1928#
1929# I tried to trace the history of Yukon time and found the following
1930# regulations, giving the reference title and URL if found, regulation name,
1931# and relevant quote if available.  Each regulation specifically revokes its
1932# predecessor.  The final reference is to the current Interpretation Act
1933# authorizing and resulting from these regulatory changes.
1934#
1935# Only recent regulations were retrievable via Yukon government site search or
1936# index, and only some via Canadian legal sources.  Other sources used include
1937# articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS
1938# Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and
1939# 1970 quoted below; each article includes current extracts from provincial
1940# and territorial ST and DST regulations at the end, summaries and details of
1941# standard times and daylight saving time at many locations across Canada,
1942# with time zone maps, tables and calculations for Canadian Sunrise, Sunset,
1943# and LMST; they also cover many countries and global locations, with a chart
1944# and table showing current Universal Time offsets, and may be useful as
1945# another source of information for 1970 and earlier.
1946#
1947# * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26,
1948#   pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS)
1949#   http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75:
1950#   Yukon Interpretation Ordinance
1951#   Yukon standard time is the local mean time at the one hundred and
1952#   thirty-fifth meridian.
1953#
1954# * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.;
1955#   JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System
1956#   (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1:
1957#   Yukon Interpretation Ordinance, 1955, Chap. 16.
1958#
1959#     (1) Subject to this section, standard time shall be reckoned as nine
1960#     hours behind Greenwich Time and called Yukon Standard Time.
1961#
1962#     (2) Notwithstanding subsection (1), the Commissioner may make regulations
1963#     varying the manner of reckoning standard time.
1964#
1965# * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance
1966#   http://? - no online source found
1967#
1968# * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC,
1969#   Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS)
1970#   http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon
1971#   Territory Commissioner's Order 1967-59 Interpretation Ordinance ...
1972#
1973#     1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon
1974#     Territory on 27th January, 1966, is hereby revoked.
1975#
1976#     2. Yukon (East) Standard Time as defined by section 36 of the
1977#     Interpretation Ordinance from and after mid-night on the 28th day of May,
1978#     1967 shall be reckoned in the same manner as Pacific Standard Time, that
1979#     is to say, eight hours behind Greenwich Time in the area of the Yukon
1980#     Territory lying east of the 138th degree longitude west.
1981#
1982#     3. In the remainder of the Territory, lying west of the 138th degree
1983#     longitude west, Yukon (West) Standard Time shall be reckoned as nine
1984#     hours behind Greenwich Time.
1985#
1986# * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214
1987#   http://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html
1988#   C.O. 1973/214 INTERPRETATION ACT ...
1989#
1990#     1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby
1991#     revoked.
1992#
1993#     2. Yukon Standard Time as defined by section 36 of the Interpretation
1994#     Act from and after midnight on the twenty-eighth day of October, 1973
1995#     shall be reckoned in the same manner as Pacific Standard Time, that is
1996#     to say eight hours behind Greenwich Time.
1997#
1998# * O.I.C. 1980/02 INTERPRETATION ACT
1999#   http://? - no online source found
2000#
2001# * Yukon Daylight Saving Time, YOIC 1987/56
2002#   http://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html
2003#   O.I.C. 1987/056 INTERPRETATION ACT ...
2004#
2005#   In every year between
2006#     (a) two o'clock in the morning in the first Sunday in April, and
2007#     (b) two o'clock in the morning in the last Sunday in October,
2008#   Standard Time shall be reckoned as seven hours behind Greenwich Time and
2009#   called Yukon Daylight Saving Time.
2010#   ...
2011#   Dated ... 9th day of March, A.D., 1987.
2012#
2013# * Yukon Daylight Saving Time 2006, YOIC 2006/127
2014#   http://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html
2015#   O.I.C. 2006/127 INTERPRETATION ACT ...
2016#
2017#     1. In Yukon each year the time for general purposes shall be 7 hours
2018#     behind Greenwich mean time during the period commencing at two o'clock
2019#     in the forenoon on the second Sunday of March and ending at two o'clock
2020#     in the forenoon on the first Sunday of November and shall be called
2021#     Yukon Daylight Saving Time.
2022#
2023#     2. Order-in-Council 1987/56 is revoked.
2024#
2025#     3. This order comes into force January 1, 2007.
2026#
2027# * Interpretation Act, RSY 2002, c 125
2028# http://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html
2029
2030# From Rives McDow (1999-09-04):
2031# Nunavut ... moved ... to incorporate the whole territory into one time zone.
2032# Nunavut moves to single time zone Oct. 31
2033# http://www.nunatsiaq.com/nunavut/nvt90903_13.html
2034#
2035# From Antoine Leca (1999-09-06):
2036# We then need to create a new timezone for the Kitikmeot region of Nunavut
2037# to differentiate it from the Yellowknife region.
2038
2039# From Paul Eggert (1999-09-20):
2040# Basic Facts: The New Territory
2041# http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html
2042# (1999) reports that Pangnirtung operates on eastern time,
2043# and that Coral Harbour does not observe DST.  We don't know when
2044# Pangnirtung switched to eastern time; we'll guess 1995.
2045
2046# From Rives McDow (1999-11-08):
2047# On October 31, when the rest of Nunavut went to Central time,
2048# Pangnirtung wobbled.  Here is the result of their wobble:
2049#
2050# The following businesses and organizations in Pangnirtung use Central Time:
2051#
2052#	First Air, Power Corp, Nunavut Construction, Health Center, RCMP,
2053#	Eastern Arctic National Parks, A & D Specialist
2054#
2055# The following businesses and organizations in Pangnirtung use Eastern Time:
2056#
2057#	Hamlet office, All other businesses, Both schools, Airport operator
2058#
2059# This has made for an interesting situation there, which warranted the news.
2060# No one there that I spoke with seems concerned, or has plans to
2061# change the local methods of keeping time, as it evidently does not
2062# really interfere with any activities or make things difficult locally.
2063# They plan to celebrate New Year's turn-over twice, one hour apart,
2064# so it appears that the situation will last at least that long.
2065# The Nunavut Intergovernmental Affairs hopes that they will "come to
2066# their senses", but the locals evidently don't see any problem with
2067# the current state of affairs.
2068
2069# From Michaela Rodrigue, writing in the
2070# Nunatsiaq News (1999-11-19):
2071# http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html
2072# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones,
2073# central - or Nunavut time - for government offices, and eastern time
2074# for municipal offices and schools....  Igloolik [was similar but then]
2075# made the switch to central time on Saturday, Nov. 6.
2076
2077# From Paul Eggert (2000-10-02):
2078# Matthews and Vincent (1998) say the following, but we lack histories
2079# for these potential new Zones.
2080#
2081# The Canadian Forces station at Alert uses Eastern Time while the
2082# handful of residents at the Eureka weather station [in the Central
2083# zone] skip daylight savings.  Baffin Island, which is crossed by the
2084# Central, Eastern and Atlantic Time zones only uses Eastern Time.
2085# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of
2086# Central Time and Southampton Island [in the Central zone] is not
2087# required to use daylight savings.
2088
2089# From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html>
2090# Nunavut now has two time zones (2000-11-10):
2091# The Nunavut government would allow its employees in Kugluktuk and
2092# Cambridge Bay to operate on central time year-round, putting them
2093# one hour behind the rest of Nunavut for six months during the winter.
2094# At the end of October the two communities had rebelled against
2095# Nunavut's unified time zone, refusing to shift to eastern time with
2096# the rest of the territory for the winter.  Cambridge Bay remained on
2097# central time, while Kugluktuk, even farther west, reverted to
2098# mountain time, which they had used before the advent of Nunavut's
2099# unified time zone in 1999.
2100#
2101# From Rives McDow (2001-01-20), quoting the Nunavut government:
2102# The preceding decision came into effect at midnight, Saturday Nov 4, 2000.
2103
2104# From Paul Eggert (2000-12-04):
2105# Let's just keep track of the official times for now.
2106
2107# From Rives McDow (2001-03-07):
2108# The premier of Nunavut has issued a ministerial statement advising
2109# that effective 2001-04-01, the territory of Nunavut will revert
2110# back to three time zones (mountain, central, and eastern).  Of the
2111# cities in Nunavut, Coral Harbor is the only one that I know of that
2112# has said it will not observe dst, staying on EST year round.  I'm
2113# checking for more info, and will get back to you if I come up with
2114# more.
2115# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]
2116
2117# From Gwillim Law (2005-05-21):
2118# According to ...
2119# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp
2120# (from a 1998 Canadian Geographic article), the de facto and de jure time
2121# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year
2122# round.  Using Google, it's easy to find other websites that confirm this.
2123# I wasn't able to find how far back this time regimen goes, but since it
2124# predates the creation of Nunavut, it probably goes back many years....
2125# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used.
2126#
2127# From Paul Eggert (2014-10-17):
2128# For lack of better information, assume that Southampton Island observed
2129# daylight saving only during wartime.  Gwillim Law's email also
2130# mentioned maps now maintained by National Research Council Canada;
2131# see above for an up-to-date link.
2132
2133# From Chris Walton (2007-03-01):
2134# ... the community of Resolute (located on Cornwallis Island in
2135# Nunavut) moved from Central Time to Eastern Time last November.
2136# Basically the community did not change its clocks at the end of
2137# daylight saving....
2138# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html
2139
2140# From Chris Walton (2011-03-21):
2141# Back in 2007 I initiated the creation of a new "zone file" for Resolute
2142# Bay. Resolute Bay is a small community located about 900km north of
2143# the Arctic Circle. The zone file was required because Resolute Bay had
2144# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007.
2145#
2146# According to new information which I received last week, Resolute Bay
2147# went back to using UTC-6 in the winter of 2007-2008...
2148#
2149# On March 11/2007 most of Canada went onto daylight saving. On March
2150# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I
2151# talked to somebody that was both knowledgeable and helpful. I was able
2152# to confirm that Resolute Bay was still operating on UTC-5. It was
2153# explained to me that Resolute Bay had been on the Eastern Time zone
2154# (EST) in the winter, and was now back on the Central Time zone (CDT).
2155# i.e. the time zone had changed twice in the last year but the clocks
2156# had not moved. The residents had to know which time zone they were in
2157# so they could follow the correct TV schedule...
2158#
2159# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I
2160# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature
2161# of the phone call, I decided to seek out an alternate source of
2162# information. I found an e-mail address for somebody by the name of
2163# Stephanie Adams whose job was listed as "Inns North Support Officer for
2164# Arctic Co-operatives." I was under the impression that Stephanie lived
2165# and worked in Resolute Bay...
2166#
2167# On March 14/2011 I phoned the hamlet office again. I was told that
2168# Resolute Bay had been using Central Standard Time over the winter of
2169# 2010-2011 and that the clocks had therefore been moved one hour ahead
2170# on March 13/2011. The person I talked to was aware that Resolute Bay
2171# had previously experimented with Eastern Standard Time but he could not
2172# tell me when the practice had stopped.
2173#
2174# On March 17/2011 I searched the Web to find an e-mail address of
2175# somebody that might be able to tell me exactly when Resolute Bay went
2176# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz
2177# used to be the mayor of Resolute Bay and he apparently owns half the
2178# businesses including "South Camp Inn." This website has some info on
2179# Aziz:
2180# http://www.uphere.ca/node/493
2181#
2182# I sent Aziz an e-mail asking when Resolute Bay had stopped using
2183# Eastern Standard Time.
2184#
2185# Aziz responded quickly with this: "hi, The time was not changed for the
2186# 1 year only, the following year, the community went back to the old way
2187# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in
2188# the winter Zulu plus 6 hrs"
2189#
2190# This of course conflicted with everything I had ascertained in November 2008.
2191#
2192# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz
2193# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You
2194# may want to check with the weather office in Resolute Bay or do a
2195# search on the weather through Env. Canada. web site"
2196#
2197# If I had realized the Stephanie did not live in Resolute Bay I would
2198# never have contacted her.  I now believe that all the information I
2199# obtained in November 2008 should be ignored...
2200# I apologize for reporting incorrect information in 2008.
2201
2202# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2203Rule	NT_YK	1918	only	-	Apr	14	2:00	1:00	D
2204Rule	NT_YK	1918	only	-	Oct	27	2:00	0	S
2205Rule	NT_YK	1919	only	-	May	25	2:00	1:00	D
2206Rule	NT_YK	1919	only	-	Nov	 1	0:00	0	S
2207Rule	NT_YK	1942	only	-	Feb	 9	2:00	1:00	W # War
2208Rule	NT_YK	1945	only	-	Aug	14	23:00u	1:00	P # Peace
2209Rule	NT_YK	1945	only	-	Sep	30	2:00	0	S
2210Rule	NT_YK	1965	only	-	Apr	lastSun	0:00	2:00	DD
2211Rule	NT_YK	1965	only	-	Oct	lastSun	2:00	0	S
2212Rule	NT_YK	1980	1986	-	Apr	lastSun	2:00	1:00	D
2213Rule	NT_YK	1980	2006	-	Oct	lastSun	2:00	0	S
2214Rule	NT_YK	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
2215# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2216# aka Panniqtuuq
2217Zone America/Pangnirtung 0	-	zzz	1921 # trading post est.
2218			-4:00	NT_YK	A%sT	1995 Apr Sun>=1  2:00
2219			-5:00	Canada	E%sT	1999 Oct 31  2:00
2220			-6:00	Canada	C%sT	2000 Oct 29  2:00
2221			-5:00	Canada	E%sT
2222# formerly Frobisher Bay
2223Zone America/Iqaluit	0	-	zzz	1942 Aug # Frobisher Bay est.
2224			-5:00	NT_YK	E%sT	1999 Oct 31  2:00
2225			-6:00	Canada	C%sT	2000 Oct 29  2:00
2226			-5:00	Canada	E%sT
2227# aka Qausuittuq
2228Zone America/Resolute	0	-	zzz	1947 Aug 31 # Resolute founded
2229			-6:00	NT_YK	C%sT	2000 Oct 29  2:00
2230			-5:00	-	EST	2001 Apr  1  3:00
2231			-6:00	Canada	C%sT	2006 Oct 29  2:00
2232			-5:00	-	EST	2007 Mar 11  3:00
2233			-6:00	Canada	C%sT
2234# aka Kangiqiniq
2235Zone America/Rankin_Inlet 0	-	zzz	1957 # Rankin Inlet founded
2236			-6:00	NT_YK	C%sT	2000 Oct 29  2:00
2237			-5:00	-	EST	2001 Apr  1  3:00
2238			-6:00	Canada	C%sT
2239# aka Iqaluktuuttiaq
2240Zone America/Cambridge_Bay 0	-	zzz	1920 # trading post est.?
2241			-7:00	NT_YK	M%sT	1999 Oct 31  2:00
2242			-6:00	Canada	C%sT	2000 Oct 29  2:00
2243			-5:00	-	EST	2000 Nov  5  0:00
2244			-6:00	-	CST	2001 Apr  1  3:00
2245			-7:00	Canada	M%sT
2246Zone America/Yellowknife 0	-	zzz	1935 # Yellowknife founded?
2247			-7:00	NT_YK	M%sT	1980
2248			-7:00	Canada	M%sT
2249Zone America/Inuvik	0	-	zzz	1953 # Inuvik founded
2250			-8:00	NT_YK	P%sT	1979 Apr lastSun  2:00
2251			-7:00	NT_YK	M%sT	1980
2252			-7:00	Canada	M%sT
2253Zone America/Whitehorse	-9:00:12 -	LMT	1900 Aug 20
2254			-9:00	NT_YK	Y%sT	1967 May 28  0:00
2255			-8:00	NT_YK	P%sT	1980
2256			-8:00	Canada	P%sT
2257Zone America/Dawson	-9:17:40 -	LMT	1900 Aug 20
2258			-9:00	NT_YK	Y%sT	1973 Oct 28  0:00
2259			-8:00	NT_YK	P%sT	1980
2260			-8:00	Canada	P%sT
2261
2262
2263###############################################################################
2264
2265# Mexico
2266
2267# From Paul Eggert (2014-12-07):
2268# The Investigation and Analysis Service of the
2269# Mexican Library of Congress (MLoC) has published a
2270# history of Mexican local time (in Spanish)
2271# http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm
2272#
2273# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC.
2274# (In all cases we go with the MLoC.)
2275# S&P report that Baja was at -8:00 in 1922/1923.
2276# S&P say the 1930 transition in Baja was 1930-11-16.
2277# S&P report no DST during summer 1931.
2278# S&P report a transition at 1932-03-30 23:00, not 1932-04-01.
2279
2280# From Gwillim Law (2001-02-20):
2281# There are some other discrepancies between the Decrees page and the
2282# tz database.  I think they can best be explained by supposing that
2283# the researchers who prepared the Decrees page failed to find some of
2284# the relevant documents.
2285
2286# From Alan Perry (1996-02-15):
2287# A guy from our Mexico subsidiary finally found the Presidential Decree
2288# outlining the timezone changes in Mexico.
2289#
2290# ------------- Begin Forwarded Message -------------
2291#
2292# I finally got my hands on the Official Presidential Decree that sets up the
2293# rules for the DST changes. The rules are:
2294#
2295# 1. The country is divided in 3 timezones:
2296#    - Baja California Norte (the Mexico/BajaNorte TZ)
2297#    - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)
2298#    - The rest of the country (the Mexico/General TZ)
2299#
2300# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October
2301#    at 2:00 AM, the times in each zone are as follows:
2302#    BajaNorte: GMT+7
2303#    BajaSur:   GMT+6
2304#    General:   GMT+5
2305#
2306# 3. The rest of the year, the times are as follows:
2307#    BajaNorte: GMT+8
2308#    BajaSur:   GMT+7
2309#    General:   GMT+6
2310#
2311# The Decree was published in Mexico's Official Newspaper on January 4th.
2312#
2313# -------------- End Forwarded Message --------------
2314# From Paul Eggert (1996-06-12):
2315# For an English translation of the decree, see
2316# "Diario Oficial: Time Zone Changeover" (1996-01-04).
2317# http://mexico-travel.com/extra/timezone_eng.html
2318
2319# From Rives McDow (1998-10-08):
2320# The State of Quintana Roo has reverted back to central STD and DST times
2321# (i.e. UTC -0600 and -0500 as of 1998-08-02).
2322
2323# From Rives McDow (2000-01-10):
2324# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time
2325# zone 5 hours from the International Date Line, and will not observe daylight
2326# savings time so as to stay on the same time zone as the southern part of
2327# Arizona year round.
2328
2329# From Jesper N��rgaard, translating
2330# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):
2331# In Oaxaca, the 55.000 teachers from the Section 22 of the National
2332# Syndicate of Education Workers, refuse to apply daylight saving each
2333# year, so that the more than 10,000 schools work at normal hour the
2334# whole year.
2335
2336# From Gwillim Law (2001-01-19):
2337# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says
2338# (translated):...
2339# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced
2340# that Summer Time will be reduced from seven to five months, starting
2341# this year....
2342# http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001
2343# [translated], says "summer time will ... take effect on the first Sunday
2344# in May, and end on the last Sunday of September.
2345
2346# From Arthur David Olson (2001-01-25):
2347# The 2001-01-24 traditional Washington Post contained the page one
2348# story "Timely Issue Divides Mexicans."...
2349# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
2350# ... Mexico City Mayor L��pez Obrador "...is threatening to keep
2351# Mexico City and its 20 million residents on a different time than
2352# the rest of the country..." In particular, L��pez Obrador would abolish
2353# observation of Daylight Saving Time.
2354
2355# Official statute published by the Energy Department
2356# http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre
2357# (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
2358# and Sonora with no DST.  This was reported by Jesper N��rgaard (2001-02-03).
2359
2360# From Paul Eggert (2001-03-03):
2361#
2362# http://www.latimes.com/news/nation/20010303/t000018766.html
2363# James F. Smith writes in today's LA Times
2364# * Sonora will continue to observe standard time.
2365# * Last week Mexico City's mayor Andr��s Manuel L��pez Obrador decreed that
2366#   the Federal District will not adopt DST.
2367# * 4 of 16 district leaders announced they'll ignore the decree.
2368# * The decree does not affect federal-controlled facilities including
2369#   the airport, banks, hospitals, and schools.
2370#
2371# For now we'll assume that the Federal District will bow to federal rules.
2372
2373# From Jesper N��rgaard (2001-04-01):
2374# I found some references to the Mexican application of daylight
2375# saving, which modifies what I had already sent you, stating earlier
2376# that a number of northern Mexican states would go on daylight
2377# saving. The modification reverts this to only cover Baja California
2378# (Norte), while all other states (except Sonora, who has no daylight
2379# saving all year) will follow the original decree of president
2380# Vicente Fox, starting daylight saving May 6, 2001 and ending
2381# September 30, 2001.
2382# References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp>
2383# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)
2384
2385# From Reuters (2001-09-04):
2386# Mexico's Supreme Court on Tuesday declared that daylight savings was
2387# unconstitutional in Mexico City, creating the possibility the
2388# capital will be in a different time zone from the rest of the nation
2389# next year....  The Supreme Court's ruling takes effect at 2:00
2390# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to
2391# standard time. "This is so residents of the Federal District are not
2392# subject to unexpected time changes," a statement from the court said.
2393
2394# From Jesper N��rgaard Welen (2002-03-12):
2395# ... consulting my local grocery store(!) and my coworkers, they all insisted
2396# that a new decision had been made to reinstate US style DST in Mexico....
2397# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20)
2398# confirms this.  Sonora as usual is the only state where DST is not applied.
2399
2400# From Steffen Thorsen (2009-12-28):
2401#
2402# Steffen Thorsen wrote:
2403# > Mexico's House of Representatives has approved a proposal for northern
2404# > Mexico's border cities to share the same daylight saving schedule as
2405# > the United States.
2406# Now this has passed both the Congress and the Senate, so starting from
2407# 2010, some border regions will be the same:
2408# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/
2409# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939
2410# (Spanish)
2411#
2412# Could not find the new law text, but the proposed law text changes are here:
2413# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf
2414# (Gaceta Parlamentaria)
2415#
2416# There is also a list of the votes here:
2417# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html
2418#
2419# Our page:
2420# http://www.timeanddate.com/news/time/north-mexico-dst-change.html
2421
2422# From Arthur David Olson (2010-01-20):
2423# The page
2424# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
2425# includes this text:
2426# En los municipios fronterizos de Tijuana y Mexicali en Baja California;
2427# Ju��rez y Ojinaga en Chihuahua; Acu��a y Piedras Negras en Coahuila;
2428# An��huac en Nuevo Le��n; y Nuevo Laredo, Reynosa y Matamoros en
2429# Tamaulipas, la aplicaci��n de este horario estacional surtir�� efecto
2430# desde las dos horas del segundo domingo de marzo y concluir�� a las dos
2431# horas del primer domingo de noviembre.
2432# En los municipios fronterizos que se encuentren ubicados en la franja
2433# fronteriza norte en el territorio comprendido entre la l��nea
2434# internacional y la l��nea paralela ubicada a una distancia de veinte
2435# kil��metros, as�� como la Ciudad de Ensenada, Baja California, hacia el
2436# interior del pa��s, la aplicaci��n de este horario estacional surtir��
2437# efecto desde las dos horas del segundo domingo de marzo y concluir�� a
2438# las dos horas del primer domingo de noviembre.
2439
2440# From Steffen Thorsen (2014-12-08), translated by Gwillim Law:
2441# The Mexican state of Quintana Roo will likely change to EST in 2015.
2442#
2443# http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo
2444# "With this change, the time conflict that has existed between the municipios
2445# of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an
2446# end. The latter declared itself in rebellion 15 years ago when a time change
2447# was initiated in Mexico, and since then it has refused to change its time
2448# zone along with the rest of the country."
2449#
2450# From Steffen Thorsen (2015-01-14), translated by Gwillim Law:
2451# http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html
2452# "...the new time zone will come into effect at two o'clock on the first Sunday
2453# of February, when we will have to advance the clock one hour from its current
2454# time..."
2455# Also, the new zone will not use DST.
2456#
2457# From Carlos Ra��l Perasso (2015-02-02):
2458# The decree that modifies the Mexican Hour System Law has finally
2459# been published at the Diario Oficial de la Federaci��n
2460# http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015
2461# It establishes 5 zones for Mexico:
2462# 1- Zona Centro (Central Zone): Corresponds to longitude 90 W,
2463#    includes most of Mexico, excluding what's mentioned below.
2464# 2- Zona Pac��fico (Pacific Zone): Longitude 105 W, includes the
2465#    states of Baja California Sur; Chihuahua; Nayarit (excluding Bah��a
2466#    de Banderas which lies in Central Zone); Sinaloa and Sonora.
2467# 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the
2468#    state of Baja California.
2469# 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state
2470#    of Quintana Roo.
2471# 5- The islands, reefs and keys shall take their timezone from the
2472#    longitude they are located at.
2473
2474# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2475Rule	Mexico	1939	only	-	Feb	5	0:00	1:00	D
2476Rule	Mexico	1939	only	-	Jun	25	0:00	0	S
2477Rule	Mexico	1940	only	-	Dec	9	0:00	1:00	D
2478Rule	Mexico	1941	only	-	Apr	1	0:00	0	S
2479Rule	Mexico	1943	only	-	Dec	16	0:00	1:00	W # War
2480Rule	Mexico	1944	only	-	May	1	0:00	0	S
2481Rule	Mexico	1950	only	-	Feb	12	0:00	1:00	D
2482Rule	Mexico	1950	only	-	Jul	30	0:00	0	S
2483Rule	Mexico	1996	2000	-	Apr	Sun>=1	2:00	1:00	D
2484Rule	Mexico	1996	2000	-	Oct	lastSun	2:00	0	S
2485Rule	Mexico	2001	only	-	May	Sun>=1	2:00	1:00	D
2486Rule	Mexico	2001	only	-	Sep	lastSun	2:00	0	S
2487Rule	Mexico	2002	max	-	Apr	Sun>=1	2:00	1:00	D
2488Rule	Mexico	2002	max	-	Oct	lastSun	2:00	0	S
2489# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2490# Quintana Roo; represented by Canc��n
2491Zone America/Cancun	-5:47:04 -	LMT	1922 Jan  1  0:12:56
2492			-6:00	-	CST	1981 Dec 23
2493			-5:00	Mexico	E%sT	1998 Aug  2  2:00
2494			-6:00	Mexico	C%sT	2015 Feb  1  2:00
2495			-5:00	-	EST
2496# Campeche, Yucat��n; represented by M��rida
2497Zone America/Merida	-5:58:28 -	LMT	1922 Jan  1  0:01:32
2498			-6:00	-	CST	1981 Dec 23
2499			-5:00	-	EST	1982 Dec  2
2500			-6:00	Mexico	C%sT
2501# Coahuila, Durango, Nuevo Le��n, Tamaulipas (near US border)
2502Zone America/Matamoros	-6:40:00 -	LMT	1921 Dec 31 23:20:00
2503			-6:00	-	CST	1988
2504			-6:00	US	C%sT	1989
2505			-6:00	Mexico	C%sT	2010
2506			-6:00	US	C%sT
2507# Coahuila, Durango, Nuevo Le��n, Tamaulipas (away from US border)
2508Zone America/Monterrey	-6:41:16 -	LMT	1921 Dec 31 23:18:44
2509			-6:00	-	CST	1988
2510			-6:00	US	C%sT	1989
2511			-6:00	Mexico	C%sT
2512# Central Mexico
2513Zone America/Mexico_City -6:36:36 -	LMT	1922 Jan  1  0:23:24
2514			-7:00	-	MST	1927 Jun 10 23:00
2515			-6:00	-	CST	1930 Nov 15
2516			-7:00	-	MST	1931 May  1 23:00
2517			-6:00	-	CST	1931 Oct
2518			-7:00	-	MST	1932 Apr  1
2519			-6:00	Mexico	C%sT	2001 Sep 30  2:00
2520			-6:00	-	CST	2002 Feb 20
2521			-6:00	Mexico	C%sT
2522# Chihuahua (near US border)
2523Zone America/Ojinaga	-6:57:40 -	LMT	1922 Jan  1  0:02:20
2524			-7:00	-	MST	1927 Jun 10 23:00
2525			-6:00	-	CST	1930 Nov 15
2526			-7:00	-	MST	1931 May  1 23:00
2527			-6:00	-	CST	1931 Oct
2528			-7:00	-	MST	1932 Apr  1
2529			-6:00	-	CST	1996
2530			-6:00	Mexico	C%sT	1998
2531			-6:00	-	CST	1998 Apr Sun>=1  3:00
2532			-7:00	Mexico	M%sT	2010
2533			-7:00	US	M%sT
2534# Chihuahua (away from US border)
2535Zone America/Chihuahua	-7:04:20 -	LMT	1921 Dec 31 23:55:40
2536			-7:00	-	MST	1927 Jun 10 23:00
2537			-6:00	-	CST	1930 Nov 15
2538			-7:00	-	MST	1931 May  1 23:00
2539			-6:00	-	CST	1931 Oct
2540			-7:00	-	MST	1932 Apr  1
2541			-6:00	-	CST	1996
2542			-6:00	Mexico	C%sT	1998
2543			-6:00	-	CST	1998 Apr Sun>=1  3:00
2544			-7:00	Mexico	M%sT
2545# Sonora
2546Zone America/Hermosillo	-7:23:52 -	LMT	1921 Dec 31 23:36:08
2547			-7:00	-	MST	1927 Jun 10 23:00
2548			-6:00	-	CST	1930 Nov 15
2549			-7:00	-	MST	1931 May  1 23:00
2550			-6:00	-	CST	1931 Oct
2551			-7:00	-	MST	1932 Apr  1
2552			-6:00	-	CST	1942 Apr 24
2553			-7:00	-	MST	1949 Jan 14
2554			-8:00	-	PST	1970
2555			-7:00	Mexico	M%sT	1999
2556			-7:00	-	MST
2557
2558# From Alexander Krivenyshev (2010-04-21):
2559# According to news, Bah��a de Banderas (Mexican state of Nayarit)
2560# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to
2561# share the same time zone as nearby city Puerto Vallarta, Jalisco).
2562#
2563# (Spanish)
2564# Bah��a de Banderas homologa su horario al del centro del
2565# pa��s, a partir de este domingo
2566# http://www.nayarit.gob.mx/notes.asp?id=20748
2567#
2568# Bah��a de Banderas homologa su horario con el del Centro del
2569# Pa��s
2570# 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
2571#
2572# (English)
2573# Puerto Vallarta and Bah��a de Banderas: One Time Zone
2574# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml
2575# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html
2576#
2577# "Mexico's Senate approved the amendments to the Mexican Schedule System that
2578# will allow Bah��a de Banderas and Puerto Vallarta to share the same time
2579# zone ..."
2580# Baja California Sur, Nayarit, Sinaloa
2581
2582# From Arthur David Olson (2010-05-01):
2583# Use "Bahia_Banderas" to keep the name to fourteen characters.
2584
2585# Mazatl��n
2586Zone America/Mazatlan	-7:05:40 -	LMT	1921 Dec 31 23:54:20
2587			-7:00	-	MST	1927 Jun 10 23:00
2588			-6:00	-	CST	1930 Nov 15
2589			-7:00	-	MST	1931 May  1 23:00
2590			-6:00	-	CST	1931 Oct
2591			-7:00	-	MST	1932 Apr  1
2592			-6:00	-	CST	1942 Apr 24
2593			-7:00	-	MST	1949 Jan 14
2594			-8:00	-	PST	1970
2595			-7:00	Mexico	M%sT
2596
2597# Bah��a de Banderas
2598Zone America/Bahia_Banderas	-7:01:00 -	LMT	1921 Dec 31 23:59:00
2599			-7:00	-	MST	1927 Jun 10 23:00
2600			-6:00	-	CST	1930 Nov 15
2601			-7:00	-	MST	1931 May  1 23:00
2602			-6:00	-	CST	1931 Oct
2603			-7:00	-	MST	1932 Apr  1
2604			-6:00	-	CST	1942 Apr 24
2605			-7:00	-	MST	1949 Jan 14
2606			-8:00	-	PST	1970
2607			-7:00	Mexico	M%sT	2010 Apr  4  2:00
2608			-6:00	Mexico	C%sT
2609
2610# Baja California (near US border)
2611Zone America/Tijuana	-7:48:04 -	LMT	1922 Jan  1  0:11:56
2612			-7:00	-	MST	1924
2613			-8:00	-	PST	1927 Jun 10 23:00
2614			-7:00	-	MST	1930 Nov 15
2615			-8:00	-	PST	1931 Apr  1
2616			-8:00	1:00	PDT	1931 Sep 30
2617			-8:00	-	PST	1942 Apr 24
2618			-8:00	1:00	PWT	1945 Aug 14 23:00u
2619			-8:00	1:00	PPT	1945 Nov 12 # Peace
2620			-8:00	-	PST	1948 Apr  5
2621			-8:00	1:00	PDT	1949 Jan 14
2622			-8:00	-	PST	1954
2623			-8:00	CA	P%sT	1961
2624			-8:00	-	PST	1976
2625			-8:00	US	P%sT	1996
2626			-8:00	Mexico	P%sT	2001
2627			-8:00	US	P%sT	2002 Feb 20
2628			-8:00	Mexico	P%sT	2010
2629			-8:00	US	P%sT
2630# From Paul Eggert (2006-03-22):
2631# Formerly there was an America/Ensenada zone, which differed from
2632# America/Tijuana only in that it did not observe DST from 1976
2633# through 1995.  This was as per Shanks (1999).  But Shanks & Pottenger say
2634# Ensenada did not observe DST from 1948 through 1975.  Guy Harris reports
2635# that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and
2636# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that
2637# DST-observance was a town-by-town matter back then.  This concerns
2638# data after 1970 so most likely there should be at least one Zone
2639# other than America/Tijuana for Baja, but it's not clear yet what its
2640# name or contents should be.
2641#
2642# From Paul Eggert (2015-10-08):
2643# Formerly there was an America/Santa_Isabel zone, but this appears to
2644# have come from a misreading of
2645# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
2646# It has been moved to the 'backward' file.
2647#
2648#
2649# Revillagigedo Is
2650# no information
2651
2652###############################################################################
2653
2654# Anguilla
2655# Antigua and Barbuda
2656# See America/Port_of_Spain.
2657
2658# Bahamas
2659#
2660# For 1899 Milne gives -5:09:29.5; round that.
2661#
2662# From Sue Williams (2006-12-07):
2663# The Bahamas announced about a month ago that they plan to change their DST
2664# rules to sync with the U.S. starting in 2007....
2665# http://www.jonesbahamas.com/?c=45&a=10412
2666
2667# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2668Rule	Bahamas	1964	1975	-	Oct	lastSun	2:00	0	S
2669Rule	Bahamas	1964	1975	-	Apr	lastSun	2:00	1:00	D
2670# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2671Zone	America/Nassau	-5:09:30 -	LMT	1912 Mar 2
2672			-5:00	Bahamas	E%sT	1976
2673			-5:00	US	E%sT
2674
2675# Barbados
2676
2677# For 1899 Milne gives -3:58:29.2; round that.
2678
2679# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2680Rule	Barb	1977	only	-	Jun	12	2:00	1:00	D
2681Rule	Barb	1977	1978	-	Oct	Sun>=1	2:00	0	S
2682Rule	Barb	1978	1980	-	Apr	Sun>=15	2:00	1:00	D
2683Rule	Barb	1979	only	-	Sep	30	2:00	0	S
2684Rule	Barb	1980	only	-	Sep	25	2:00	0	S
2685# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2686Zone America/Barbados	-3:58:29 -	LMT	1924 # Bridgetown
2687			-3:58:29 -	BMT	1932 # Bridgetown Mean Time
2688			-4:00	Barb	A%sT
2689
2690# Belize
2691# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.
2692# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2693Rule	Belize	1918	1942	-	Oct	Sun>=2	0:00	0:30	HD
2694Rule	Belize	1919	1943	-	Feb	Sun>=9	0:00	0	S
2695Rule	Belize	1973	only	-	Dec	 5	0:00	1:00	D
2696Rule	Belize	1974	only	-	Feb	 9	0:00	0	S
2697Rule	Belize	1982	only	-	Dec	18	0:00	1:00	D
2698Rule	Belize	1983	only	-	Feb	12	0:00	0	S
2699# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2700Zone	America/Belize	-5:52:48 -	LMT	1912 Apr
2701			-6:00	Belize	C%sT
2702
2703# Bermuda
2704
2705# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower,
2706# Bermuda dockyard, Ireland I; round that.
2707
2708# From Dan Jones, reporting in The Royal Gazette (2006-06-26):
2709
2710# Next year, however, clocks in the US will go forward on the second Sunday
2711# in March, until the first Sunday in November.  And, after the Time Zone
2712# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
2713# Friday, the same thing will happen in Bermuda.
2714# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135
2715
2716# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2717Zone Atlantic/Bermuda	-4:19:18 -	LMT	1930 Jan  1  2:00 # Hamilton
2718			-4:00	-	AST	1974 Apr 28  2:00
2719			-4:00	Canada	A%sT	1976
2720			-4:00	US	A%sT
2721
2722# Cayman Is
2723# See America/Panama.
2724
2725# Costa Rica
2726
2727# Milne gives -5:36:13.3 as San Jos�� mean time; round to nearest.
2728
2729# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2730Rule	CR	1979	1980	-	Feb	lastSun	0:00	1:00	D
2731Rule	CR	1979	1980	-	Jun	Sun>=1	0:00	0	S
2732Rule	CR	1991	1992	-	Jan	Sat>=15	0:00	1:00	D
2733# IATA SSIM (1991-09) says the following was at 1:00;
2734# go with Shanks & Pottenger.
2735Rule	CR	1991	only	-	Jul	 1	0:00	0	S
2736Rule	CR	1992	only	-	Mar	15	0:00	0	S
2737# There are too many San Jos��s elsewhere, so we'll use 'Costa Rica'.
2738# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2739Zone America/Costa_Rica	-5:36:13 -	LMT	1890        # San Jos��
2740			-5:36:13 -	SJMT	1921 Jan 15 # San Jos�� Mean Time
2741			-6:00	CR	C%sT
2742# Coco
2743# no information; probably like America/Costa_Rica
2744
2745# Cuba
2746
2747# From Paul Eggert (2013-02-21):
2748# Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57
2749# for the port, and -5:30 for meteorological observations.
2750# For now, stick with Shanks & Pottenger.
2751
2752# From Arthur David Olson (1999-03-29):
2753# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
2754# the Cuban National Team and the Baltimore Orioles was carried live on
2755# the Orioles Radio Network, including affiliate WTOP in Washington, DC.
2756# During the game, play-by-play announcer Jim Hunter noted that
2757# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
2758# Time today."  (The "two hour" remark referred to losing one hour of
2759# sleep on 1999-03-28 - when the announcers were in Cuba as it switched
2760# to DST - and one more hour on 1999-04-04 - when the announcers will have
2761# returned to Baltimore, which switches on that date.)
2762
2763# From Steffen Thorsen (2013-11-11):
2764# DST start in Cuba in 2004 ... does not follow the same rules as the
2765# years before.  The correct date should be Sunday 2004-03-28 00:00 ...
2766# https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html
2767
2768# From Evert van der Veer via Steffen Thorsen (2004-10-28):
2769# Cuba is not going back to standard time this year.
2770# From Paul Eggert (2006-03-22):
2771# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html
2772# says that it's due to a problem at the Antonio Guiteras
2773# thermoelectric plant, and says "This October there will be no return
2774# to normal hours (after daylight saving time)".
2775# For now, let's assume that it's a temporary measure.
2776
2777# From Carlos A. Carnero Delgado (2005-11-12):
2778# This year (just like in 2004-2005) there's no change in time zone
2779# adjustment in Cuba.  We will stay in daylight saving time:
2780# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html
2781
2782# From Jesper N��rgaard Welen (2006-10-21):
2783# An article in GRANMA INTERNACIONAL claims that Cuba will end
2784# the 3 years of permanent DST next weekend, see
2785# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html
2786# "On Saturday night, October 28 going into Sunday, October 29, at 01:00,
2787# watches should be set back one hour - going back to 00:00 hours - returning
2788# to the normal schedule....
2789
2790# From Paul Eggert (2007-03-02):
2791# <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday,
2792# says Cuban clocks will advance at midnight on March 10.
2793# For lack of better information, assume Cuba will use US rules,
2794# except that it switches at midnight standard time as usual.
2795#
2796# From Steffen Thorsen (2007-10-25):
2797# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week
2798# earlier - on the last Sunday of October, just like in 2006.
2799#
2800# He supplied these references:
2801#
2802# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES
2803# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm
2804#
2805# From Alex Krivenyshev (2007-10-25):
2806# Here is also article from Granma (Cuba):
2807#
2808# Regir�� el Horario Normal desde el pr��ximo domingo 28 de octubre
2809# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html
2810#
2811# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html
2812
2813# From Arthur David Olson (2008-03-09):
2814# I'm in Maryland which is now observing United States Eastern Daylight
2815# Time. At 9:44 local time I used RealPlayer to listen to
2816# http://media.enet.cu/radioreloj
2817# a Cuban information station, and heard
2818# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"),
2819# indicating that Cuba is still on standard time.
2820
2821# From Steffen Thorsen (2008-03-12):
2822# It seems that Cuba will start DST on Sunday, 2007-03-16...
2823# It was announced yesterday, according to this source (in Spanish):
2824# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm
2825#
2826# Some more background information is posted here:
2827# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html
2828#
2829# The article also says that Cuba has been observing DST since 1963,
2830# while Shanks (and tzdata) has 1965 as the first date (except in the
2831# 1940's). Many other web pages in Cuba also claim that it has been
2832# observed since 1963, but with the exception of 1970 - an exception
2833# which is not present in tzdata/Shanks. So there is a chance we need to
2834# change some historic records as well.
2835#
2836# One example:
2837# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm
2838
2839# From Jesper N��rgaard Welen (2008-03-13):
2840# The Cuban time change has just been confirmed on the most authoritative
2841# web site, the Granma.  Please check out
2842# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html
2843#
2844# Basically as expected after Steffen Thorsen's information, the change
2845# will take place midnight between Saturday and Sunday.
2846
2847# From Arthur David Olson (2008-03-12):
2848# Assume Sun>=15 (third Sunday) going forward.
2849
2850# From Alexander Krivenyshev (2009-03-04)
2851# According to the Radio Reloj - Cuba will start Daylight Saving Time on
2852# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009-
2853# not on midnight March 14 / March 15 as previously thought.
2854#
2855# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html
2856# (in Spanish)
2857
2858# From Arthur David Olson (2009-03-09)
2859# I listened over the Internet to
2860# http://media.enet.cu/readioreloj
2861# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the
2862# the time was announced as "diez cinco" - the same time as here, indicating
2863# that has indeed switched to DST. Assume second Sunday from 2009 forward.
2864
2865# From Steffen Thorsen (2011-03-08):
2866# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00
2867# this year. Nothing about the end date known so far (if that has
2868# changed at all).
2869#
2870# Source:
2871# http://granma.co.cu/2011/03/08/nacional/artic01.html
2872#
2873# Our info:
2874# http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html
2875#
2876# From Steffen Thorsen (2011-10-30)
2877# Cuba will end DST two weeks later this year. Instead of going back
2878# tonight, it has been delayed to 2011-11-13 at 01:00.
2879#
2880# One source (Spanish)
2881# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html
2882#
2883# Our page:
2884# http://www.timeanddate.com/news/time/cuba-time-changes-2011.html
2885#
2886# From Steffen Thorsen (2012-03-01)
2887# According to Radio Reloj, Cuba will start DST on Midnight between March
2888# 31 and April 1.
2889#
2890# Radio Reloj has the following info (Spanish):
2891# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril
2892#
2893# Our info on it:
2894# http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html
2895
2896# From Steffen Thorsen (2012-11-03):
2897# Radio Reloj and many other sources report that Cuba is changing back
2898# to standard time on 2012-11-04:
2899# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre
2900# From Paul Eggert (2012-11-03):
2901# For now, assume the future rule is first Sunday in November.
2902
2903# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2904Rule	Cuba	1928	only	-	Jun	10	0:00	1:00	D
2905Rule	Cuba	1928	only	-	Oct	10	0:00	0	S
2906Rule	Cuba	1940	1942	-	Jun	Sun>=1	0:00	1:00	D
2907Rule	Cuba	1940	1942	-	Sep	Sun>=1	0:00	0	S
2908Rule	Cuba	1945	1946	-	Jun	Sun>=1	0:00	1:00	D
2909Rule	Cuba	1945	1946	-	Sep	Sun>=1	0:00	0	S
2910Rule	Cuba	1965	only	-	Jun	1	0:00	1:00	D
2911Rule	Cuba	1965	only	-	Sep	30	0:00	0	S
2912Rule	Cuba	1966	only	-	May	29	0:00	1:00	D
2913Rule	Cuba	1966	only	-	Oct	2	0:00	0	S
2914Rule	Cuba	1967	only	-	Apr	8	0:00	1:00	D
2915Rule	Cuba	1967	1968	-	Sep	Sun>=8	0:00	0	S
2916Rule	Cuba	1968	only	-	Apr	14	0:00	1:00	D
2917Rule	Cuba	1969	1977	-	Apr	lastSun	0:00	1:00	D
2918Rule	Cuba	1969	1971	-	Oct	lastSun	0:00	0	S
2919Rule	Cuba	1972	1974	-	Oct	8	0:00	0	S
2920Rule	Cuba	1975	1977	-	Oct	lastSun	0:00	0	S
2921Rule	Cuba	1978	only	-	May	7	0:00	1:00	D
2922Rule	Cuba	1978	1990	-	Oct	Sun>=8	0:00	0	S
2923Rule	Cuba	1979	1980	-	Mar	Sun>=15	0:00	1:00	D
2924Rule	Cuba	1981	1985	-	May	Sun>=5	0:00	1:00	D
2925Rule	Cuba	1986	1989	-	Mar	Sun>=14	0:00	1:00	D
2926Rule	Cuba	1990	1997	-	Apr	Sun>=1	0:00	1:00	D
2927Rule	Cuba	1991	1995	-	Oct	Sun>=8	0:00s	0	S
2928Rule	Cuba	1996	only	-	Oct	 6	0:00s	0	S
2929Rule	Cuba	1997	only	-	Oct	12	0:00s	0	S
2930Rule	Cuba	1998	1999	-	Mar	lastSun	0:00s	1:00	D
2931Rule	Cuba	1998	2003	-	Oct	lastSun	0:00s	0	S
2932Rule	Cuba	2000	2003	-	Apr	Sun>=1	0:00s	1:00	D
2933Rule	Cuba	2004	only	-	Mar	lastSun	0:00s	1:00	D
2934Rule	Cuba	2006	2010	-	Oct	lastSun	0:00s	0	S
2935Rule	Cuba	2007	only	-	Mar	Sun>=8	0:00s	1:00	D
2936Rule	Cuba	2008	only	-	Mar	Sun>=15	0:00s	1:00	D
2937Rule	Cuba	2009	2010	-	Mar	Sun>=8	0:00s	1:00	D
2938Rule	Cuba	2011	only	-	Mar	Sun>=15	0:00s	1:00	D
2939Rule	Cuba	2011	only	-	Nov	13	0:00s	0	S
2940Rule	Cuba	2012	only	-	Apr	1	0:00s	1:00	D
2941Rule	Cuba	2012	max	-	Nov	Sun>=1	0:00s	0	S
2942Rule	Cuba	2013	max	-	Mar	Sun>=8	0:00s	1:00	D
2943
2944# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2945Zone	America/Havana	-5:29:28 -	LMT	1890
2946			-5:29:36 -	HMT	1925 Jul 19 12:00 # Havana MT
2947			-5:00	Cuba	C%sT
2948
2949# Dominica
2950# See America/Port_of_Spain.
2951
2952# Dominican Republic
2953
2954# From Steffen Thorsen (2000-10-30):
2955# Enrique Morales reported to me that the Dominican Republic has changed the
2956# time zone to Eastern Standard Time as of Sunday 29 at 2 am....
2957# http://www.listin.com.do/antes/261000/republica/princi.html
2958
2959# From Paul Eggert (2000-12-04):
2960# That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
2961
2962# From Rives McDow (2000-12-01):
2963# Dominican Republic changed its mind and presidential decree on Tuesday,
2964# November 28, 2000, with a new decree.  On Sunday, December 3 at 1:00 AM the
2965# Dominican Republic will be reverting to 8 hours from the International Date
2966# Line, and will not be using DST in the foreseeable future.  The reason they
2967# decided to use DST was to be in synch with Puerto Rico, who was also going
2968# to implement DST.  When Puerto Rico didn't implement DST, the president
2969# decided to revert.
2970
2971
2972# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2973Rule	DR	1966	only	-	Oct	30	0:00	1:00	D
2974Rule	DR	1967	only	-	Feb	28	0:00	0	S
2975Rule	DR	1969	1973	-	Oct	lastSun	0:00	0:30	HD
2976Rule	DR	1970	only	-	Feb	21	0:00	0	S
2977Rule	DR	1971	only	-	Jan	20	0:00	0	S
2978Rule	DR	1972	1974	-	Jan	21	0:00	0	S
2979# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2980Zone America/Santo_Domingo -4:39:36 -	LMT	1890
2981			-4:40	-	SDMT	1933 Apr  1 12:00 # S. Dom. MT
2982			-5:00	DR	E%sT	1974 Oct 27
2983			-4:00	-	AST	2000 Oct 29  2:00
2984			-5:00	US	E%sT	2000 Dec  3  1:00
2985			-4:00	-	AST
2986
2987# El Salvador
2988
2989# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2990Rule	Salv	1987	1988	-	May	Sun>=1	0:00	1:00	D
2991Rule	Salv	1987	1988	-	Sep	lastSun	0:00	0	S
2992# There are too many San Salvadors elsewhere, so use America/El_Salvador
2993# instead of America/San_Salvador.
2994# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2995Zone America/El_Salvador -5:56:48 -	LMT	1921 # San Salvador
2996			-6:00	Salv	C%sT
2997
2998# Grenada
2999# Guadeloupe
3000# St Barth��lemy
3001# St Martin (French part)
3002# See America/Port_of_Spain.
3003
3004# Guatemala
3005#
3006# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
3007# Diario Co Latino, at
3008# <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>,
3009# says in an article dated 2006-04-19 that the Guatemalan government had
3010# decided on that date to advance official time by 60 minutes, to lessen the
3011# impact of the elevated cost of oil....  Daylight saving time will last from
3012# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
3013# From Paul Eggert (2006-06-22):
3014# The Ministry of Energy and Mines, press release CP-15/2006
3015# (2006-04-19), says DST ends at 24:00.  See
3016# http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf
3017
3018# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
3019Rule	Guat	1973	only	-	Nov	25	0:00	1:00	D
3020Rule	Guat	1974	only	-	Feb	24	0:00	0	S
3021Rule	Guat	1983	only	-	May	21	0:00	1:00	D
3022Rule	Guat	1983	only	-	Sep	22	0:00	0	S
3023Rule	Guat	1991	only	-	Mar	23	0:00	1:00	D
3024Rule	Guat	1991	only	-	Sep	 7	0:00	0	S
3025Rule	Guat	2006	only	-	Apr	30	0:00	1:00	D
3026Rule	Guat	2006	only	-	Oct	 1	0:00	0	S
3027# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3028Zone America/Guatemala	-6:02:04 -	LMT	1918 Oct 5
3029			-6:00	Guat	C%sT
3030
3031# Haiti
3032# From Gwillim Law (2005-04-15):
3033# Risto O. Nyk��nen wrote me that Haiti is now on DST.
3034# I searched for confirmation, and I found a press release
3035# on the Web page of the Haitian Consulate in Chicago (2005-03-31),
3036# <http://www.haitianconsulate.org/time.doc>.  Translated from French, it says:
3037#
3038#  "The Prime Minister's Communication Office notifies the public in general
3039#   and the press in particular that, following a decision of the Interior
3040#   Ministry and the Territorial Collectivities [I suppose that means the
3041#   provinces], Haiti will move to Eastern Daylight Time in the night from next
3042#   Saturday the 2nd to Sunday the 3rd.
3043#
3044#  "Consequently, the Prime Minister's Communication Office wishes to inform
3045#   the population that the country's clocks will be set forward one hour
3046#   starting at midnight.  This provision will hold until the last Saturday in
3047#   October 2005.
3048#
3049#  "Port-au-Prince, March 31, 2005"
3050#
3051# From Steffen Thorsen (2006-04-04):
3052# I have been informed by users that Haiti observes DST this year like
3053# last year, so the current "only" rule for 2005 might be changed to a
3054# "max" rule or to last until 2006. (Who knows if they will observe DST
3055# next year or if they will extend their DST like US/Canada next year).
3056#
3057# I have found this article about it (in French):
3058# http://www.haitipressnetwork.com/news.cfm?articleID=7612
3059#
3060# The reason seems to be an energy crisis.
3061
3062# From Stephen Colebourne (2007-02-22):
3063# Some IATA info: Haiti won't be having DST in 2007.
3064
3065# From Steffen Thorsen (2012-03-11):
3066# According to several news sources, Haiti will observe DST this year,
3067# apparently using the same start and end date as USA/Canada.
3068# So this means they have already changed their time.
3069#
3070# http://www.alterpresse.org/spip.php?article12510
3071# http://radiovision2000haiti.net/home/?p=13253
3072#
3073# From Arthur David Olson (2012-03-11):
3074# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to
3075# 3:00 a.m. rather than the traditional Haitian jump at midnight.
3076# Assume a US-style fall back as well.
3077
3078# From Steffen Thorsen (2013-03-10):
3079# It appears that Haiti is observing DST this year as well, same rules
3080# as US/Canada.  They did it last year as well, and it looks like they
3081# are going to observe DST every year now...
3082#
3083# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/
3084# http://www.canalplushaiti.net/?p=6714
3085
3086# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
3087Rule	Haiti	1983	only	-	May	8	0:00	1:00	D
3088Rule	Haiti	1984	1987	-	Apr	lastSun	0:00	1:00	D
3089Rule	Haiti	1983	1987	-	Oct	lastSun	0:00	0	S
3090# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
3091# Go with IATA.
3092Rule	Haiti	1988	1997	-	Apr	Sun>=1	1:00s	1:00	D
3093Rule	Haiti	1988	1997	-	Oct	lastSun	1:00s	0	S
3094Rule	Haiti	2005	2006	-	Apr	Sun>=1	0:00	1:00	D
3095Rule	Haiti	2005	2006	-	Oct	lastSun	0:00	0	S
3096Rule	Haiti	2012	max	-	Mar	Sun>=8	2:00	1:00	D
3097Rule	Haiti	2012	max	-	Nov	Sun>=1	2:00	0	S
3098# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3099Zone America/Port-au-Prince -4:49:20 -	LMT	1890
3100			-4:49	-	PPMT	1917 Jan 24 12:00 # P-a-P MT
3101			-5:00	Haiti	E%sT
3102
3103# Honduras
3104# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.
3105
3106# From Paul Eggert (2006-05-05):
3107# worldtimezone.com reports a 2006-05-02 Spanish-language AP article
3108# saying Honduras will start using DST midnight Saturday, effective 4
3109# months until September.  La Tribuna reported today
3110# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president
3111# of Honduras, refused to back down on this.
3112
3113# From Jesper N��rgaard Welen (2006-08-08):
3114# It seems that Honduras has returned from DST to standard time this Monday at
3115# 00:00 hours (prolonging Sunday to 25 hours duration).
3116# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html
3117
3118# From Paul Eggert (2006-08-08):
3119# Also see Diario El Heraldo, The country returns to standard time (2006-08-08).
3120# http://www.elheraldo.hn/nota.php?nid=54941&sec=12
3121# It mentions executive decree 18-2006.
3122
3123# From Steffen Thorsen (2006-08-17):
3124# Honduras will observe DST from 2007 to 2009, exact dates are not
3125# published, I have located this authoritative source:
3126# http://www.presidencia.gob.hn/noticia.aspx?nId=47
3127
3128# From Steffen Thorsen (2007-03-30):
3129# http://www.laprensahn.com/pais_nota.php?id04962=7386
3130# So it seems that Honduras will not enter DST this year....
3131
3132# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
3133Rule	Hond	1987	1988	-	May	Sun>=1	0:00	1:00	D
3134Rule	Hond	1987	1988	-	Sep	lastSun	0:00	0	S
3135Rule	Hond	2006	only	-	May	Sun>=1	0:00	1:00	D
3136Rule	Hond	2006	only	-	Aug	Mon>=1	0:00	0	S
3137# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3138Zone America/Tegucigalpa -5:48:52 -	LMT	1921 Apr
3139			-6:00	Hond	C%sT
3140#
3141# Great Swan I ceded by US to Honduras in 1972
3142
3143# Jamaica
3144# Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an
3145# unspecified official document, and says "This time is used throughout the
3146# island".  Go with Milne.  Round to the nearest second as required by zic.
3147#
3148# Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but
3149# Lance Neita writes that Prime Minister Michael Manley decreed it January 5.
3150# Assume Neita meant Jan 6 02:00, the same as the US.  Neita also writes that
3151# Manley's supporters associated this act with Manley's nickname "Joshua"
3152# (recall that in the Bible the sun stood still at Joshua's request),
3153# and with the Rod of Correction which Manley said he had received from
3154# Haile Selassie, Emperor of Ethiopia.  See:
3155# Neita L. The politician in all of us. Jamaica Observer 2014-09-20
3156# http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647
3157#
3158# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3159Zone	America/Jamaica	-5:07:11 -	LMT	1890        # Kingston
3160			-5:07:11 -	KMT	1912 Feb    # Kingston Mean Time
3161			-5:00	-	EST	1974
3162			-5:00	US	E%sT	1984
3163			-5:00	-	EST
3164
3165# Martinique
3166# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3167Zone America/Martinique	-4:04:20 -      LMT	1890        # Fort-de-France
3168			-4:04:20 -	FFMT	1911 May    # Fort-de-France MT
3169			-4:00	-	AST	1980 Apr  6
3170			-4:00	1:00	ADT	1980 Sep 28
3171			-4:00	-	AST
3172
3173# Montserrat
3174# See America/Port_of_Spain.
3175
3176# Nicaragua
3177#
3178# This uses Shanks & Pottenger for times before 2005.
3179#
3180# From Steffen Thorsen (2005-04-12):
3181# I've got reports from 8 different people that Nicaragua just started
3182# DST on Sunday 2005-04-10, in order to save energy because of
3183# expensive petroleum.  The exact end date for DST is not yet
3184# announced, only "September" but some sites also say "mid-September".
3185# Some background information is available on the President's official site:
3186# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm
3187# The Decree, no 23-2005 is available here:
3188# 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
3189#
3190# From Paul Eggert (2005-05-01):
3191# The decree doesn't say anything about daylight saving, but for now let's
3192# assume that it is daylight saving....
3193#
3194# From Gwillim Law (2005-04-21):
3195# The Associated Press story on the time change, which can be found at
3196# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html
3197# and elsewhere, says (fifth paragraph, translated from Spanish): "The last
3198# time that a change of clocks was applied to save energy was in the year 2000
3199# during the Arnoldo Alem��n administration."...
3200# The northamerica file says that Nicaragua has been on UTC-6 continuously
3201# since December 1998.  I wasn't able to find any details of Nicaraguan time
3202# changes in 2000.  Perhaps a note could be added to the northamerica file, to
3203# the effect that we have indirect evidence that DST was observed in 2000.
3204#
3205# From Jesper N��rgaard Welen (2005-11-02):
3206# Nicaragua left DST the 2005-10-02 at 00:00 (local time).
3207# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm
3208# (2005-09-26)
3209#
3210# From Jesper N��rgaard Welen (2006-05-05):
3211# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410
3212# (my informal translation)
3213# By order of the president of the republic, Enrique Bola��os, Nicaragua
3214# advanced by sixty minutes their official time, yesterday at 2 in the
3215# morning, and will stay that way until 30th of September.
3216#
3217# From Jesper N��rgaard Welen (2006-09-30):
3218# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf
3219# My informal translation runs:
3220# The natural sun time is restored in all the national territory, in that the
3221# time is returned one hour at 01:00 am of October 1 of 2006.
3222#
3223# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
3224Rule	Nic	1979	1980	-	Mar	Sun>=16	0:00	1:00	D
3225Rule	Nic	1979	1980	-	Jun	Mon>=23	0:00	0	S
3226Rule	Nic	2005	only	-	Apr	10	0:00	1:00	D
3227Rule	Nic	2005	only	-	Oct	Sun>=1	0:00	0	S
3228Rule	Nic	2006	only	-	Apr	30	2:00	1:00	D
3229Rule	Nic	2006	only	-	Oct	Sun>=1	1:00	0	S
3230# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3231Zone	America/Managua	-5:45:08 -	LMT	1890
3232			-5:45:12 -	MMT	1934 Jun 23 # Managua Mean Time?
3233			-6:00	-	CST	1973 May
3234			-5:00	-	EST	1975 Feb 16
3235			-6:00	Nic	C%sT	1992 Jan  1  4:00
3236			-5:00	-	EST	1992 Sep 24
3237			-6:00	-	CST	1993
3238			-5:00	-	EST	1997
3239			-6:00	Nic	C%sT
3240
3241# Panama
3242# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3243Zone	America/Panama	-5:18:08 -	LMT	1890
3244			-5:19:36 -	CMT	1908 Apr 22 # Col��n Mean Time
3245			-5:00	-	EST
3246Link America/Panama America/Cayman
3247
3248# Puerto Rico
3249# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'.
3250# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3251Zone America/Puerto_Rico -4:24:25 -	LMT	1899 Mar 28 12:00 # San Juan
3252			-4:00	-	AST	1942 May  3
3253			-4:00	US	A%sT	1946
3254			-4:00	-	AST
3255
3256# St Kitts-Nevis
3257# St Lucia
3258# See America/Port_of_Spain.
3259
3260# St Pierre and Miquelon
3261# There are too many St Pierres elsewhere, so we'll use 'Miquelon'.
3262# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3263Zone America/Miquelon	-3:44:40 -	LMT	1911 May 15 # St Pierre
3264			-4:00	-	AST	1980 May
3265			-3:00	-	PMST	1987 # Pierre & Miquelon Time
3266			-3:00	Canada	PM%sT
3267
3268# St Vincent and the Grenadines
3269# See America/Port_of_Spain.
3270
3271# Turks and Caicos
3272#
3273# From Chris Dunn in
3274# http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007
3275# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3276# daylight saving dates for time changes have been adjusted to match
3277# the recent U.S. change of dates.
3278#
3279# From Brian Inglis (2007-04-28):
3280# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
3281# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
3282# rows before that there is an out of date entry for Oct:
3283# "Eastern Standard Times Begins 2007
3284# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time"
3285# indicating that the normal ET rules are followed.
3286#
3287# From Paul Eggert (2014-08-19):
3288# The 2014-08-13 Cabinet meeting decided to stay on UTC-4 year-round.  See:
3289# http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm
3290# Model this as a switch from EST/EDT to AST ...
3291# From Chris Walton (2014-11-04):
3292# ... the TCI government appears to have delayed the switch to
3293# "permanent daylight saving time" by one year....
3294# http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm
3295#
3296# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3297Zone America/Grand_Turk	-4:44:32 -	LMT	1890
3298			-5:07:11 -	KMT	1912 Feb # Kingston Mean Time
3299			-5:00	-	EST	1979
3300			-5:00	US	E%sT	2015 Nov Sun>=1 2:00
3301			-4:00	-	AST
3302
3303# British Virgin Is
3304# Virgin Is
3305# See America/Port_of_Spain.
3306
3307
3308# Local Variables:
3309# coding: utf-8
3310# End:
3311