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
51# From Paul Eggert (2016-09-21):
52# Dowd's proposal left many details unresolved, such as where to draw
53# lines between time zones.  The key individual who made time zones
54# work in the US was William Frederick Allen - railway engineer,
55# managing editor of the Travelers' Guide, and secretary of the
56# General Time Convention, a railway standardization group.  Allen
57# spent months in dialogs with scientific and railway leaders,
58# developed a workable plan to institute time zones, and presented it
59# to the General Time Convention on 1883-04-11, saying that his plan
60# meant "local time would be practically abolished" - a plus for
61# railway scheduling.  By the next convention on 1883-10-11 nearly all
62# railroads had agreed and it took effect on 1883-11-18 at 12:00.
63# That Sunday was called the "day of two noons", as the eastern parts
64# of the new zones observed noon twice.  Allen witnessed the
65# transition in New York City, writing:
66#
67#   I heard the bells of St. Paul's strike on the old time.  Four
68#   minutes later, obedient to the electrical signal from the Naval
69#   Observatory ... the time-ball made its rapid descent, the chimes
70#   of old Trinity rang twelve measured strokes, and local time was
71#   abandoned, probably forever.
72#
73# Most of the US soon followed suit.  See:
74# Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56.
75# http://dx.doi.org/10.2307/3105430
76
77# From Paul Eggert (2005-04-16):
78# That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
79# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).
80
81# From Paul Eggert (2006-03-22):
82# A good source for time zone historical data in the US is
83# Thomas G. Shanks, The American Atlas (5th edition),
84# San Diego: ACS Publications, Inc. (1991).
85# Make sure you have the errata sheet; the book is somewhat useless without it.
86# It is the source for most of the pre-1991 US entries below.
87
88# From Paul Eggert (2001-03-06):
89# Daylight Saving Time was first suggested as a joke by Benjamin Franklin
90# in his whimsical essay "An Economical Project for Diminishing the Cost
91# of Light" published in the Journal de Paris (1784-04-26).
92# Not everyone is happy with the results:
93#
94#	I don't really care how time is reckoned so long as there is some
95#	agreement about it, but I object to being told that I am saving
96#	daylight when my reason tells me that I am doing nothing of the kind.
97#	I even object to the implication that I am wasting something
98#	valuable if I stay in bed after the sun has risen.  As an admirer
99#	of moonlight I resent the bossy insistence of those who want to
100#	reduce my time for enjoying it.  At the back of the Daylight Saving
101#	scheme I detect the bony, blue-fingered hand of Puritanism, eager
102#	to push people into bed earlier, and get them up earlier, to make
103#	them healthy, wealthy and wise in spite of themselves.
104#
105#	 -- Robertson Davies, The diary of Samuel Marchbanks,
106#	   Clarke, Irwin (1947), XIX, Sunday
107#
108# For more about the first ten years of DST in the United States, see
109# Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint
110# (Carnegie Library of Pittsburgh, 1927).
111# http://www.clpgh.org/exhibit/dst.html
112#
113# Shanks says that DST was called "War Time" in the US in 1918 and 1919.
114# However, DST was imposed by the Standard Time Act of 1918, which
115# was the first nationwide legal time standard, and apparently
116# time was just called "Standard Time" or "Daylight Saving Time".
117
118# From Arthur David Olson:
119# US Daylight Saving Time ended on the last Sunday of *October* in 1974.
120# See, for example, the front page of the Saturday, 1974-10-26
121# and Sunday, 1974-10-27 editions of the Washington Post.
122
123# From Arthur David Olson:
124# Before the Uniform Time Act of 1966 took effect in 1967, observance of
125# Daylight Saving Time in the US was by local option, except during wartime.
126
127# From Arthur David Olson (2000-09-25):
128# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
129# In the introduction, Oboler spoke of "Eastern Peace Time."
130# An AltaVista search turned up:
131# http://rowayton.org/rhs/hstaug45.html
132# "When the time is announced over the radio now, it is 'Eastern Peace
133# Time' instead of the old familiar 'Eastern War Time.'  Peace is wonderful."
134# (August 1945) by way of confirmation.
135
136# From Joseph Gallant citing
137# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
138# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
139# to switch to London for Attlee's address, but the American people
140# never got to hear his speech live. According to one press account,
141# CBS' Bob Trout was first to announce the word of Japan's surrender,
142# but a few seconds later, NBC, ABC and Mutual also flashed the word
143# of surrender, all of whom interrupting the bells of Big Ben in
144# London which were to precede Mr. Attlee's speech.
145
146# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout.  From
147# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times:
148#
149# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender.
150# Any announcement from Asia would reach St. John's New York newsroom on a
151# wire service teletype machine, which had prescribed signals for major news.
152# Associated Press, for example, would ring five bells before spewing out
153# typed copy of an important story, and 10 bells for news "of transcendental
154# importance."
155#
156# On Aug. 14, stalling while talking steadily into the NBC networks' open
157# microphone, St. John heard five bells and waited only to hear a sixth bell,
158# before announcing confidently: "Ladies and gentlemen, World War II is over.
159# The Japanese have agreed to our surrender terms."
160#
161# He had scored a 20-second scoop on other broadcasters.
162
163# From Arthur David Olson (2005-08-22):
164# Paul has been careful to use the "US" rules only in those locations
165# that are part of the United States; this reflects the real scope of
166# U.S. government action.  So even though the "US" rules have changed
167# in the latest release, other countries won't be affected.
168
169# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
170Rule	US	1918	1919	-	Mar	lastSun	2:00	1:00	D
171Rule	US	1918	1919	-	Oct	lastSun	2:00	0	S
172Rule	US	1942	only	-	Feb	9	2:00	1:00	W # War
173Rule	US	1945	only	-	Aug	14	23:00u	1:00	P # Peace
174Rule	US	1945	only	-	Sep	lastSun	2:00	0	S
175Rule	US	1967	2006	-	Oct	lastSun	2:00	0	S
176Rule	US	1967	1973	-	Apr	lastSun	2:00	1:00	D
177Rule	US	1974	only	-	Jan	6	2:00	1:00	D
178Rule	US	1975	only	-	Feb	23	2:00	1:00	D
179Rule	US	1976	1986	-	Apr	lastSun	2:00	1:00	D
180Rule	US	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
181Rule	US	2007	max	-	Mar	Sun>=8	2:00	1:00	D
182Rule	US	2007	max	-	Nov	Sun>=1	2:00	0	S
183
184# From Arthur David Olson, 2005-12-19
185# We generate the files specified below to guard against old files with
186# obsolete information being left in the time zone binary directory.
187# We limit the list to names that have appeared in previous versions of
188# this time zone package.
189# We do these as separate Zones rather than as Links to avoid problems if
190# a particular place changes whether it observes DST.
191# We put these specifications here in the northamerica file both to
192# increase the chances that they'll actually get compiled and to
193# avoid the need to duplicate the US rules in another file.
194
195# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
196Zone	EST		 -5:00	-	EST
197Zone	MST		 -7:00	-	MST
198Zone	HST		-10:00	-	HST
199Zone	EST5EDT		 -5:00	US	E%sT
200Zone	CST6CDT		 -6:00	US	C%sT
201Zone	MST7MDT		 -7:00	US	M%sT
202Zone	PST8PDT		 -8:00	US	P%sT
203
204# From U. S. Naval Observatory (1989-01-19):
205# USA  EASTERN       5 H  BEHIND UTC    NEW YORK, WASHINGTON
206# USA  EASTERN       4 H  BEHIND UTC    APR 3 - OCT 30
207# USA  CENTRAL       6 H  BEHIND UTC    CHICAGO, HOUSTON
208# USA  CENTRAL       5 H  BEHIND UTC    APR 3 - OCT 30
209# USA  MOUNTAIN      7 H  BEHIND UTC    DENVER
210# USA  MOUNTAIN      6 H  BEHIND UTC    APR 3 - OCT 30
211# USA  PACIFIC       8 H  BEHIND UTC    L.A., SAN FRANCISCO
212# USA  PACIFIC       7 H  BEHIND UTC    APR 3 - OCT 30
213# USA  ALASKA STD    9 H  BEHIND UTC    MOST OF ALASKA     (AKST)
214# USA  ALASKA STD    8 H  BEHIND UTC    APR 3 - OCT 30 (AKDT)
215# USA  ALEUTIAN     10 H  BEHIND UTC    ISLANDS WEST OF 170W
216# USA    "           9 H  BEHIND UTC    APR 3 - OCT 30
217# USA  HAWAII       10 H  BEHIND UTC
218# USA  BERING       11 H  BEHIND UTC    SAMOA, MIDWAY
219
220# From Arthur David Olson (1989-01-21):
221# The above dates are for 1988.
222# Note the "AKST" and "AKDT" abbreviations, the claim that there's
223# no DST in Samoa, and the claim that there is DST in Alaska and the
224# Aleutians.
225
226# From Arthur David Olson (1988-02-13):
227# Legal standard time zone names, from United States Code (1982 Edition and
228# Supplement III), Title 15, Chapter 6, Section 260 and forward.  First, names
229# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966
230# took effect), as explained in sections 263 and 261:
231#	(none)
232#	United States standard eastern time
233#	United States standard mountain time
234#	United States standard central time
235#	United States standard Pacific time
236#	(none)
237#	United States standard Alaska time
238#	(none)
239# Next, names from 1967-04-01 until 1983-11-30 (the date for
240# public law 98-181):
241#	Atlantic standard time
242#	eastern standard time
243#	central standard time
244#	mountain standard time
245#	Pacific standard time
246#	Yukon standard time
247#	Alaska-Hawaii standard time
248#	Bering standard time
249# And after 1983-11-30:
250#	Atlantic standard time
251#	eastern standard time
252#	central standard time
253#	mountain standard time
254#	Pacific standard time
255#	Alaska standard time
256#	Hawaii-Aleutian standard time
257#	Samoa standard time
258# The law doesn't give abbreviations.
259#
260# From Paul Eggert (2016-12-19):
261# Here are URLs for the 1918 and 1966 legislation:
262# http://uscode.house.gov/statviewer.htm?volume=40&page=451
263# http://uscode.house.gov/statviewer.htm?volume=80&page=108
264# Although the 1918 names were officially "United States Standard
265# Eastern Time" and similarly for "Central", "Mountain", "Pacific",
266# and "Alaska", in practice "Standard" was placed just before "Time",
267# as codified in 1966.  In practice, Alaska time was abbreviated "AST"
268# before 1968.  Summarizing the 1967 name changes:
269#	1918 names			1967 names
270#  -08	Standard Pacific Time (PST)	Pacific standard time (PST)
271#  -09	(unofficial) Yukon (YST)	Yukon standard time (YST)
272#  -10	Standard Alaska Time (AST)	Alaska-Hawaii standard time (AHST)
273#  -11	(unofficial) Nome (NST)		Bering standard time (BST)
274#
275# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
276# Public law 106-564 (2000-12-23) introduced ... "Chamorro Standard Time"
277# for time in Guam and the Northern Marianas.  See the file "australasia".
278#
279# From Paul Eggert (2015-04-17):
280# HST and HDT are standardized abbreviations for Hawaii-Aleutian
281# standard and daylight times.  See section 9.47 (p 234) of the
282# U.S. Government Printing Office Style Manual (2008)
283# http://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf
284
285# From Arthur David Olson, 2005-08-09
286# The following was signed into law on 2005-08-08.
287#
288# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
289#   (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15
290#   U.S.C. 260a(a)) is amended--
291#     (1) by striking "first Sunday of April" and inserting "second
292#     Sunday of March"; and
293#     (2) by striking "last Sunday of October" and inserting "first
294#     Sunday of November'.
295#   (b) Effective Date.--Subsection (a) shall take effect 1 year after the
296#   date of enactment of this Act or March 1, 2007, whichever is later.
297#   (c) Report to Congress.--Not later than 9 months after the effective
298#   date stated in subsection (b), the Secretary shall report to Congress
299#   on the impact of this section on energy consumption in the United
300#   States.
301#   (d) Right to Revert.--Congress retains the right to revert the
302#   Daylight Saving Time back to the 2005 time schedules once the
303#   Department study is complete.
304
305# US eastern time, represented by New York
306
307# Connecticut, Delaware, District of Columbia, most of Florida,
308# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky
309# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts,
310# New Hampshire, New Jersey, New York, North Carolina, Ohio,
311# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee,
312# Vermont, Virginia, West Virginia
313
314# From Dave Cantor (2004-11-02):
315# Early this summer I had the occasion to visit the Mount Washington
316# Observatory weather station atop (of course!) Mount Washington [, NH]....
317# One of the staff members said that the station was on Eastern Standard Time
318# and didn't change their clocks for Daylight Saving ... so that their
319# reports will always have times which are 5 hours behind UTC.
320
321# From Paul Eggert (2005-08-26):
322# According to today's Huntsville Times
323# http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1
324# a few towns on Alabama's "eastern border with Georgia, such as Phenix City
325# in Russell County, Lanett in Chambers County and some towns in Lee County,
326# set their watches and clocks on Eastern time."  It quotes H.H. "Bubba"
327# Roberts, city administrator in Phenix City. as saying "We are in the Central
328# time zone, but we do go by the Eastern time zone because so many people work
329# in Columbus."
330#
331# From Paul Eggert (2017-02-22):
332# Four cities are involved.  The two not mentioned above are Smiths Station
333# and Valley.  Barbara Brooks, Valley's assistant treasurer, heard it started
334# because West Point Pepperell textile mills were in Alabama while the
335# corporate office was in Georgia, and residents voted to keep Eastern
336# time even after the mills closed.  See: Kazek K. Did you know which
337# Alabama towns are in a different time zone?  al.com 2017-02-06.
338# http://www.al.com/living/index.ssf/2017/02/do_you_know_which_alabama_town.html
339
340# From Paul Eggert (2014-09-06):
341# Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208
342# says that New York City Hall time was 3 minutes 58.4 seconds fast of
343# Eastern time (i.e., -4:56:01.6) just before the 1883 switch.  Round to the
344# nearest second.
345
346# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
347Rule	NYC	1920	only	-	Mar	lastSun	2:00	1:00	D
348Rule	NYC	1920	only	-	Oct	lastSun	2:00	0	S
349Rule	NYC	1921	1966	-	Apr	lastSun	2:00	1:00	D
350Rule	NYC	1921	1954	-	Sep	lastSun	2:00	0	S
351Rule	NYC	1955	1966	-	Oct	lastSun	2:00	0	S
352# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
353Zone America/New_York	-4:56:02 -	LMT	1883 Nov 18 12:03:58
354			-5:00	US	E%sT	1920
355			-5:00	NYC	E%sT	1942
356			-5:00	US	E%sT	1946
357			-5:00	NYC	E%sT	1967
358			-5:00	US	E%sT
359
360# US central time, represented by Chicago
361
362# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
363# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
364# Washington counties), Illinois, western Indiana
365# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
366# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
367# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
368# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
369# western Tennessee, most of Texas, Wisconsin
370
371# From Larry M. Smith (2006-04-26) re Wisconsin:
372# http://www.legis.state.wi.us/statutes/Stat0175.pdf ...
373# is currently enforced at the 01:00 time of change.  Because the local
374# "bar time" in the state corresponds to 02:00, a number of citations
375# are issued for the "sale of class 'B' alcohol after prohibited
376# hours" within the deviated hour of this change every year....
377#
378# From Douglas R. Bomberg (2007-03-12):
379# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI
380# Statue 175 closer in synch with the US Congress' intent....
381# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf
382
383# From an email administrator of the City of Fort Pierre, SD (2015-12-21):
384# Fort Pierre is technically located in the Mountain time zone as is
385# the rest of Stanley County.  Most of Stanley County and Fort Pierre
386# uses the Central time zone due to doing most of their business in
387# Pierre so it simplifies schedules.  I have lived in Stanley County
388# all my life and it has been that way since I can remember.  (43 years!)
389#
390# From Paul Eggert (2015-12-25):
391# Assume this practice predates 1970, so Fort Pierre can use America/Chicago.
392
393# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
394Rule	Chicago	1920	only	-	Jun	13	2:00	1:00	D
395Rule	Chicago	1920	1921	-	Oct	lastSun	2:00	0	S
396Rule	Chicago	1921	only	-	Mar	lastSun	2:00	1:00	D
397Rule	Chicago	1922	1966	-	Apr	lastSun	2:00	1:00	D
398Rule	Chicago	1922	1954	-	Sep	lastSun	2:00	0	S
399Rule	Chicago	1955	1966	-	Oct	lastSun	2:00	0	S
400# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
401Zone America/Chicago	-5:50:36 -	LMT	1883 Nov 18 12:09:24
402			-6:00	US	C%sT	1920
403			-6:00	Chicago	C%sT	1936 Mar  1  2:00
404			-5:00	-	EST	1936 Nov 15  2:00
405			-6:00	Chicago	C%sT	1942
406			-6:00	US	C%sT	1946
407			-6:00	Chicago	C%sT	1967
408			-6:00	US	C%sT
409# Oliver County, ND switched from mountain to central time on 1992-10-25.
410Zone America/North_Dakota/Center -6:45:12 - LMT	1883 Nov 18 12:14:48
411			-7:00	US	M%sT	1992 Oct 25  2:00
412			-6:00	US	C%sT
413# Morton County, ND, switched from mountain to central time on
414# 2003-10-26, except for the area around Mandan which was already central time.
415# See <http://dmses.dot.gov/docimages/p63/135818.pdf>.
416# Officially this switch also included part of Sioux County, and
417# Jones, Mellette, and Todd Counties in South Dakota;
418# but in practice these other counties were already observing central time.
419# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.
420Zone America/North_Dakota/New_Salem -6:45:39 - LMT	1883 Nov 18 12:14:21
421			-7:00	US	M%sT	2003 Oct 26  2:00
422			-6:00	US	C%sT
423
424# From Josh Findley (2011-01-21):
425# ...it appears that Mercer County, North Dakota, changed from the
426# mountain time zone to the central time zone at the last transition from
427# daylight-saving to standard time (on Nov. 7, 2010):
428# http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm
429# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html
430
431# From Andy Lipscomb (2011-01-24):
432# ...according to the Census Bureau, the largest city is Beulah (although
433# it's commonly referred to as Beulah-Hazen, with Hazen being the next
434# largest city in Mercer County).  Google Maps places Beulah's city hall
435# at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset
436# of 6h47'07".
437
438Zone America/North_Dakota/Beulah -6:47:07 - LMT	1883 Nov 18 12:12:53
439			-7:00	US	M%sT	2010 Nov  7  2:00
440			-6:00	US	C%sT
441
442# US mountain time, represented by Denver
443#
444# Colorado, far western Kansas, Montana, western
445# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City),
446# New Mexico, southwestern North Dakota,
447# western South Dakota, far western Texas (El Paso County, Hudspeth County,
448# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming
449#
450# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
451Rule	Denver	1920	1921	-	Mar	lastSun	2:00	1:00	D
452Rule	Denver	1920	only	-	Oct	lastSun	2:00	0	S
453Rule	Denver	1921	only	-	May	22	2:00	0	S
454Rule	Denver	1965	1966	-	Apr	lastSun	2:00	1:00	D
455Rule	Denver	1965	1966	-	Oct	lastSun	2:00	0	S
456# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
457Zone America/Denver	-6:59:56 -	LMT	1883 Nov 18 12:00:04
458			-7:00	US	M%sT	1920
459			-7:00	Denver	M%sT	1942
460			-7:00	US	M%sT	1946
461			-7:00	Denver	M%sT	1967
462			-7:00	US	M%sT
463
464# US Pacific time, represented by Los Angeles
465#
466# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
467# Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county
468# north of the Salmon River, and the towns of Burgdorf and Warren),
469# Nevada (except West Wendover), Oregon (except the northern 3/4 of
470# Malheur county), and Washington
471
472# From Paul Eggert (2016-08-20):
473# In early February 1948, in response to California's electricity shortage,
474# PG&E changed power frequency from 60 to 59.5 Hz during daylight hours,
475# causing electric clocks to lose six minutes per day.  (This did not change
476# legal time, and is not part of the data here.)  See:
477# Ross SA. An energy crisis from the past: Northern California in 1948.
478# Working Paper No. 8, Institute of Governmental Studies, UC Berkeley,
479# 1973-11.  http://escholarship.org/uc/item/8x22k30c
480#
481# In another measure to save electricity, DST was instituted from 1948-03-14
482# at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move
483# the fallback transition earlier.  See pages 3-4 of:
484# http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf
485#
486# In response:
487#
488#   Governor Warren received a torrent of objecting mail, and it is not too much
489#   to speculate that the objections to Daylight Saving Time were one important
490#   factor in the defeat of the Dewey-Warren Presidential ticket in California.
491#     -- Ross, p 25
492#
493# On December 8 the governor exercised the option, setting the date to January 1
494# (LA Times 1948-12-09).  The transition time was 02:00 (LA Times 1949-01-01).
495#
496# Despite the controversy, in 1949 California voters approved Proposition 12,
497# which established DST from April's last Sunday at 01:00 until September's
498# last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed
499# the fall-back date to October's last Sunday. See:
500# http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props
501# http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props
502#
503# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
504Rule	CA	1948	only	-	Mar	14	2:01	1:00	D
505Rule	CA	1949	only	-	Jan	 1	2:00	0	S
506Rule	CA	1950	1966	-	Apr	lastSun	1:00	1:00	D
507Rule	CA	1950	1961	-	Sep	lastSun	2:00	0	S
508Rule	CA	1962	1966	-	Oct	lastSun	2:00	0	S
509# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
510Zone America/Los_Angeles -7:52:58 -	LMT	1883 Nov 18 12:07:02
511			-8:00	US	P%sT	1946
512			-8:00	CA	P%sT	1967
513			-8:00	US	P%sT
514
515# Alaska
516# AK%sT is the modern abbreviation for -09 per USNO.
517#
518# From Paul Eggert (2001-05-30):
519# Howse writes that Alaska switched from the Julian to the Gregorian calendar,
520# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
521# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian,
522# also a Friday.  Include only the time zone part of this transition,
523# ignoring the switch from Julian to Gregorian, since we can't represent
524# the Julian calendar.
525#
526# As far as we know, none of the exact locations mentioned below were
527# permanently inhabited in 1867 by anyone using either calendar.
528# (Yakutat was colonized by the Russians in 1799, but the settlement
529# was destroyed in 1805 by a Yakutat-kon war party.)  However, there
530# were nearby inhabitants in some cases and for our purposes perhaps
531# it's best to simply use the official transition.
532
533# From Paul Eggert (2014-07-18):
534# One opinion of the early-1980s turmoil in Alaska over time zones and
535# daylight saving time appeared as graffiti on a Juneau airport wall:
536# "Welcome to Juneau.  Please turn your watch back to the 19th century."
537# See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01.
538# http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html
539#
540# Steve Ferguson (2011-01-31) referred to the following source:
541# Norris F. Keeping time in Alaska: national directives, local response.
542# Alaska History 2001;16(1-2).
543# http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/
544
545# From Arthur David Olson (2011-02-01):
546# Here's database-relevant material from the 2001 "Alaska History" article:
547#
548# On September 20 [1979]...DOT...officials decreed that on April 27,
549# 1980, Juneau and other nearby communities would move to Yukon Time.
550# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on
551# Pacific Time.
552#
553# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the
554# Department's September 1979 decision. Juneau and other communities in
555# northern Southeast reverted to Pacific Time on October 26.
556#
557# On October 28 [1983]...the Metlakatla Indian Community Council voted
558# unanimously to keep the reservation on Pacific Time.
559#
560# According to DOT official Joanne Petrie, Indian reservations are not
561# bound to follow time zones imposed by neighboring jurisdictions.
562#
563# (The last is consistent with how the database now handles the Navajo
564# Nation.)
565
566# From Arthur David Olson (2011-02-09):
567# I just spoke by phone with a staff member at the Metlakatla Indian
568# Community office (using contact information available at
569# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla
570# It's shortly after 1:00 here on the east coast of the United States;
571# the staffer said it was shortly after 10:00 there. When I asked whether
572# that meant they were on Pacific time, they said no - they were on their
573# own time. I asked about daylight saving; they said it wasn't used. I
574# did not inquire about practices in the past.
575
576# From Arthur David Olson (2011-08-17):
577# For lack of better information, assume that Metlakatla's
578# abandonment of use of daylight saving resulted from the 1983 vote.
579
580# From Steffen Thorsen (2015-11-09):
581# It seems Metlakatla did go off PST on Sunday, November 1, changing
582# their time to AKST and are going to follow Alaska's DST, switching
583# between AKST and AKDT from now on....
584# http://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/
585
586# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
587Zone America/Juneau	 15:02:19 -	LMT	1867 Oct 18
588			 -8:57:41 -	LMT	1900 Aug 20 12:00
589			 -8:00	-	PST	1942
590			 -8:00	US	P%sT	1946
591			 -8:00	-	PST	1969
592			 -8:00	US	P%sT	1980 Apr 27  2:00
593			 -9:00	US	Y%sT	1980 Oct 26  2:00
594			 -8:00	US	P%sT	1983 Oct 30  2:00
595			 -9:00	US	Y%sT	1983 Nov 30
596			 -9:00	US	AK%sT
597Zone America/Sitka	 14:58:47 -	LMT	1867 Oct 18
598			 -9:01:13 -	LMT	1900 Aug 20 12:00
599			 -8:00	-	PST	1942
600			 -8:00	US	P%sT	1946
601			 -8:00	-	PST	1969
602			 -8:00	US	P%sT	1983 Oct 30  2:00
603			 -9:00	US	Y%sT	1983 Nov 30
604			 -9:00	US	AK%sT
605Zone America/Metlakatla	 15:13:42 -	LMT	1867 Oct 18
606			 -8:46:18 -	LMT	1900 Aug 20 12:00
607			 -8:00	-	PST	1942
608			 -8:00	US	P%sT	1946
609			 -8:00	-	PST	1969
610			 -8:00	US	P%sT	1983 Oct 30  2:00
611			 -8:00	-	PST	2015 Nov  1  2:00
612			 -9:00	US	AK%sT
613Zone America/Yakutat	 14:41:05 -	LMT	1867 Oct 18
614			 -9:18:55 -	LMT	1900 Aug 20 12:00
615			 -9:00	-	YST	1942
616			 -9:00	US	Y%sT	1946
617			 -9:00	-	YST	1969
618			 -9:00	US	Y%sT	1983 Nov 30
619			 -9:00	US	AK%sT
620Zone America/Anchorage	 14:00:24 -	LMT	1867 Oct 18
621			 -9:59:36 -	LMT	1900 Aug 20 12:00
622			-10:00	-	AST	1942
623			-10:00	US	A%sT	1967 Apr
624			-10:00	-	AHST	1969
625			-10:00	US	AH%sT	1983 Oct 30  2:00
626			 -9:00	US	Y%sT	1983 Nov 30
627			 -9:00	US	AK%sT
628Zone America/Nome	 12:58:21 -	LMT	1867 Oct 18
629			-11:01:38 -	LMT	1900 Aug 20 12:00
630			-11:00	-	NST	1942
631			-11:00	US	N%sT	1946
632			-11:00	-	NST	1967 Apr
633			-11:00	-	BST	1969
634			-11:00	US	B%sT	1983 Oct 30  2:00
635			 -9:00	US	Y%sT	1983 Nov 30
636			 -9:00	US	AK%sT
637Zone America/Adak	 12:13:21 -	LMT	1867 Oct 18
638			-11:46:38 -	LMT	1900 Aug 20 12:00
639			-11:00	-	NST	1942
640			-11:00	US	N%sT	1946
641			-11:00	-	NST	1967 Apr
642			-11:00	-	BST	1969
643			-11:00	US	B%sT	1983 Oct 30  2:00
644			-10:00	US	AH%sT	1983 Nov 30
645			-10:00	US	H%sT
646# The following switches don't quite make our 1970 cutoff.
647#
648# Shanks writes that part of southwest Alaska (e.g. Aniak)
649# switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
650# and another part (e.g. Akiak) made the same switch five weeks later.
651#
652# From David Flater (2004-11-09):
653# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska
654# Historic Preservation Commission, provided this information, which
655# suggests that Unalaska deviated from statutory time from early 1967
656# possibly until 1983:
657#
658#  Minutes of the Unalaska City Council Meeting, January 10, 1967:
659#  "Except for St. Paul and Akutan, Unalaska is the only important
660#  location not on Alaska Standard Time.  The following resolution was
661#  made by William Robinson and seconded by Henry Swanson: Be it
662#  resolved that the City of Unalaska hereby goes to Alaska Standard
663#  Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday,
664#  January 14, Alaska Standard Time.)  This resolution was passed with
665#  three votes for and one against."
666
667# Hawaii
668
669# From Arthur David Olson (2010-12-09):
670# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225
671# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09,
672# the article is available at
673# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf
674# and indicates that standard time was adopted effective noon, January
675# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight
676# saving for the period between the last Sunday of each April and the
677# last Sunday of each September, but less than a month later repealed the
678# act," (page 220), that year-round daylight saving time was in effect
679# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for
680# when clocks changed) and that clocks were changed by 30 minutes
681# effective the second Sunday of June, 1947 (page 219, with no time of
682# day given for when clocks changed). A footnote for the 1933 changes
683# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933)
684# and Act 163 (approved 21 May 1933)."
685
686# From Arthur David Olson (2011-01-19):
687# The following is from "Laws of the Territory of Hawaii Passed by the
688# Seventeenth Legislature: Regular Session 1933," available (as of
689# 2011-01-19) at American University's Pence Law Library. Page 85: "Act
690# 90...At 2 o'clock ante meridian of the last Sunday in April of each
691# year, the standard time of this Territory shall be advanced one
692# hour...This Act shall take effect upon its approval. Approved this 26th
693# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of
694# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is
695# hereby repealed...This Act shall take effect upon its approval, upon
696# which date the standard time of this Territory shall be restored to
697# that existing immediately prior to the taking effect of said Act 90.
698# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor
699# of the Territory of Hawaii."
700#
701# Note that 1933-05-21 was a Sunday.
702# We're left to guess the time of day when Act 163 was approved; guess noon.
703
704# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
705Zone Pacific/Honolulu	-10:31:26 -	LMT	1896 Jan 13 12:00
706			-10:30	-	HST	1933 Apr 30  2:00
707			-10:30	1:00	HDT	1933 May 21 12:00
708			-10:30	-	HST	1942 Feb  9  2:00
709			-10:30	1:00	HDT	1945 Sep 30  2:00
710			-10:30	-	HST	1947 Jun  8  2:00
711			-10:00	-	HST
712
713# Now we turn to US areas that have diverged from the consensus since 1970.
714
715# Arizona mostly uses MST.
716
717# From Paul Eggert (2002-10-20):
718#
719# The information in the rest of this paragraph is derived from the
720# Daylight Saving Time web page
721# <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23)
722# maintained by the Arizona State Library, Archives and Public Records.
723# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
724# time, but by federal law railroads, airlines, bus lines, military
725# personnel, and some engaged in interstate commerce continued to
726# observe war (i.e., daylight saving) time.  The 1944-03-17 Phoenix
727# Gazette says that was the date the law changed, and that 04-01 was
728# the date the state's clocks would change.  In 1945 the State of
729# Arizona used standard time all year, again with exceptions only as
730# mandated by federal law.  Arizona observed DST in 1967, but Arizona
731# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
732#
733# Shanks says the 1944 experiment came to an end on 1944-03-17.
734# Go with the Arizona State Library instead.
735
736# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
737Zone America/Phoenix	-7:28:18 -	LMT	1883 Nov 18 11:31:42
738			-7:00	US	M%sT	1944 Jan  1  0:01
739			-7:00	-	MST	1944 Apr  1  0:01
740			-7:00	US	M%sT	1944 Oct  1  0:01
741			-7:00	-	MST	1967
742			-7:00	US	M%sT	1968 Mar 21
743			-7:00	-	MST
744# From Arthur David Olson (1988-02-13):
745# A writer from the Inter Tribal Council of Arizona, Inc.,
746# notes in private correspondence dated 1987-12-28 that "Presently, only the
747# Navajo Nation participates in the Daylight Saving Time policy, due to its
748# large size and location in three states."  (The "only" means that other
749# tribal nations don't use DST.)
750#
751# From Paul Eggert (2013-08-26):
752# See America/Denver for a zone appropriate for the Navajo Nation.
753
754# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
755# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
756# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
757# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
758# Teton, Twin Falls, Valley, Washington counties, and the southern
759# quarter of Idaho county) and eastern Oregon (most of Malheur County)
760# switched four weeks late in 1974.
761#
762# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
763Zone America/Boise	-7:44:49 -	LMT	1883 Nov 18 12:15:11
764			-8:00	US	P%sT	1923 May 13  2:00
765			-7:00	US	M%sT	1974
766			-7:00	-	MST	1974 Feb  3  2:00
767			-7:00	US	M%sT
768
769# Indiana
770#
771# For a map of Indiana's time zone regions, see:
772# http://en.wikipedia.org/wiki/Time_in_Indiana
773#
774# From Paul Eggert (2007-08-17):
775# Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
776# with the following exceptions:
777#
778# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
779#   Vanderburgh, and Warrick counties have been like America/Chicago.
780#
781# - Dearborn and Ohio counties have been like America/New_York.
782#
783# - Clark, Floyd, and Harrison counties have been like
784#   America/Kentucky/Louisville.
785#
786# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke,
787#   and Switzerland counties have their own time zone histories as noted below.
788#
789# Shanks partitioned Indiana into 345 regions, each with its own time history,
790# and wrote "Even newspaper reports present contradictory information."
791# Those Hoosiers!  Such a flighty and changeable people!
792# Fortunately, most of the complexity occurred before our cutoff date of 1970.
793#
794# Other than Indianapolis, the Indiana place names are so nondescript
795# that they would be ambiguous if we left them at the 'America' level.
796# So we reluctantly put them all in a subdirectory 'America/Indiana'.
797
798# From Paul Eggert (2014-06-26):
799# https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana
800# says "DOT is relocating the time zone boundary in Indiana to move Starke,
801# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the
802# Eastern Time Zone to the Central Time Zone.... The effective date of
803# this rule is 2 a.m. EST Sunday, April 2, 2006, which is the
804# changeover date from standard time to Daylight Saving Time."
805# Strictly speaking, this meant the affected counties changed their
806# clocks twice that night, but this obviously was in error.  The intent
807# was that 01:59:59 EST be followed by 02:00:00 CDT.
808
809# From Gwillim Law (2007-02-10):
810# The Associated Press has been reporting that Pulaski County, Indiana is
811# going to switch from Central to Eastern Time on March 11, 2007....
812# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL
813
814# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
815Rule Indianapolis 1941	only	-	Jun	22	2:00	1:00	D
816Rule Indianapolis 1941	1954	-	Sep	lastSun	2:00	0	S
817Rule Indianapolis 1946	1954	-	Apr	lastSun	2:00	1:00	D
818# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
819Zone America/Indiana/Indianapolis -5:44:38 - LMT	1883 Nov 18 12:15:22
820			-6:00	US	C%sT	1920
821			-6:00 Indianapolis C%sT	1942
822			-6:00	US	C%sT	1946
823			-6:00 Indianapolis C%sT	1955 Apr 24  2:00
824			-5:00	-	EST	1957 Sep 29  2:00
825			-6:00	-	CST	1958 Apr 27  2:00
826			-5:00	-	EST	1969
827			-5:00	US	E%sT	1971
828			-5:00	-	EST	2006
829			-5:00	US	E%sT
830#
831# Eastern Crawford County, Indiana, left its clocks alone in 1974,
832# as well as from 1976 through 2005.
833# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
834Rule	Marengo	1951	only	-	Apr	lastSun	2:00	1:00	D
835Rule	Marengo	1951	only	-	Sep	lastSun	2:00	0	S
836Rule	Marengo	1954	1960	-	Apr	lastSun	2:00	1:00	D
837Rule	Marengo	1954	1960	-	Sep	lastSun	2:00	0	S
838# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
839Zone America/Indiana/Marengo -5:45:23 -	LMT	1883 Nov 18 12:14:37
840			-6:00	US	C%sT	1951
841			-6:00	Marengo	C%sT	1961 Apr 30  2:00
842			-5:00	-	EST	1969
843			-5:00	US	E%sT	1974 Jan  6  2:00
844			-6:00	1:00	CDT	1974 Oct 27  2:00
845			-5:00	US	E%sT	1976
846			-5:00	-	EST	2006
847			-5:00	US	E%sT
848#
849# Daviess, Dubois, Knox, and Martin Counties, Indiana,
850# switched from eastern to central time in April 2006, then switched back
851# in November 2007.
852# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
853Rule Vincennes	1946	only	-	Apr	lastSun	2:00	1:00	D
854Rule Vincennes	1946	only	-	Sep	lastSun	2:00	0	S
855Rule Vincennes	1953	1954	-	Apr	lastSun	2:00	1:00	D
856Rule Vincennes	1953	1959	-	Sep	lastSun	2:00	0	S
857Rule Vincennes	1955	only	-	May	 1	0:00	1:00	D
858Rule Vincennes	1956	1963	-	Apr	lastSun	2:00	1:00	D
859Rule Vincennes	1960	only	-	Oct	lastSun	2:00	0	S
860Rule Vincennes	1961	only	-	Sep	lastSun	2:00	0	S
861Rule Vincennes	1962	1963	-	Oct	lastSun	2:00	0	S
862# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
863Zone America/Indiana/Vincennes -5:50:07 - LMT	1883 Nov 18 12:09:53
864			-6:00	US	C%sT	1946
865			-6:00 Vincennes	C%sT	1964 Apr 26  2:00
866			-5:00	-	EST	1969
867			-5:00	US	E%sT	1971
868			-5:00	-	EST	2006 Apr  2  2:00
869			-6:00	US	C%sT	2007 Nov  4  2:00
870			-5:00	US	E%sT
871#
872# Perry County, Indiana, switched from eastern to central time in April 2006.
873# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
874Rule Perry	1946	only	-	Apr	lastSun	2:00	1:00	D
875Rule Perry	1946	only	-	Sep	lastSun	2:00	0	S
876Rule Perry	1953	1954	-	Apr	lastSun	2:00	1:00	D
877Rule Perry	1953	1959	-	Sep	lastSun	2:00	0	S
878Rule Perry	1955	only	-	May	 1	0:00	1:00	D
879Rule Perry	1956	1963	-	Apr	lastSun	2:00	1:00	D
880Rule Perry	1960	only	-	Oct	lastSun	2:00	0	S
881Rule Perry	1961	only	-	Sep	lastSun	2:00	0	S
882Rule Perry	1962	1963	-	Oct	lastSun	2:00	0	S
883# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
884Zone America/Indiana/Tell_City -5:47:03 - LMT	1883 Nov 18 12:12:57
885			-6:00	US	C%sT	1946
886			-6:00 Perry	C%sT	1964 Apr 26  2:00
887			-5:00	-	EST	1969
888			-5:00	US	E%sT	1971
889			-5:00	-	EST	2006 Apr  2  2:00
890			-6:00	US	C%sT
891#
892# Pike County, Indiana moved from central to eastern time in 1977,
893# then switched back in 2006, then switched back again in 2007.
894# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
895Rule	Pike	1955	only	-	May	 1	0:00	1:00	D
896Rule	Pike	1955	1960	-	Sep	lastSun	2:00	0	S
897Rule	Pike	1956	1964	-	Apr	lastSun	2:00	1:00	D
898Rule	Pike	1961	1964	-	Oct	lastSun	2:00	0	S
899# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
900Zone America/Indiana/Petersburg -5:49:07 - LMT	1883 Nov 18 12:10:53
901			-6:00	US	C%sT	1955
902			-6:00	Pike	C%sT	1965 Apr 25  2:00
903			-5:00	-	EST	1966 Oct 30  2:00
904			-6:00	US	C%sT	1977 Oct 30  2:00
905			-5:00	-	EST	2006 Apr  2  2:00
906			-6:00	US	C%sT	2007 Nov  4  2:00
907			-5:00	US	E%sT
908#
909# Starke County, Indiana moved from central to eastern time in 1991,
910# then switched back in 2006.
911# From Arthur David Olson (1991-10-28):
912# An article on page A3 of the Sunday, 1991-10-27 Washington Post
913# notes that Starke County switched from Central time to Eastern time as of
914# 1991-10-27.
915# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
916Rule	Starke	1947	1961	-	Apr	lastSun	2:00	1:00	D
917Rule	Starke	1947	1954	-	Sep	lastSun	2:00	0	S
918Rule	Starke	1955	1956	-	Oct	lastSun	2:00	0	S
919Rule	Starke	1957	1958	-	Sep	lastSun	2:00	0	S
920Rule	Starke	1959	1961	-	Oct	lastSun	2:00	0	S
921# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
922Zone America/Indiana/Knox -5:46:30 -	LMT	1883 Nov 18 12:13:30
923			-6:00	US	C%sT	1947
924			-6:00	Starke	C%sT	1962 Apr 29  2:00
925			-5:00	-	EST	1963 Oct 27  2:00
926			-6:00	US	C%sT	1991 Oct 27  2:00
927			-5:00	-	EST	2006 Apr  2  2:00
928			-6:00	US	C%sT
929#
930# Pulaski County, Indiana, switched from eastern to central time in
931# April 2006 and then switched back in March 2007.
932# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
933Rule	Pulaski	1946	1960	-	Apr	lastSun	2:00	1:00	D
934Rule	Pulaski	1946	1954	-	Sep	lastSun	2:00	0	S
935Rule	Pulaski	1955	1956	-	Oct	lastSun	2:00	0	S
936Rule	Pulaski	1957	1960	-	Sep	lastSun	2:00	0	S
937# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
938Zone America/Indiana/Winamac -5:46:25 - LMT	1883 Nov 18 12:13:35
939			-6:00	US	C%sT	1946
940			-6:00	Pulaski	C%sT	1961 Apr 30  2:00
941			-5:00	-	EST	1969
942			-5:00	US	E%sT	1971
943			-5:00	-	EST	2006 Apr  2  2:00
944			-6:00	US	C%sT	2007 Mar 11  2:00
945			-5:00	US	E%sT
946#
947# Switzerland County, Indiana, did not observe DST from 1973 through 2005.
948# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
949Zone America/Indiana/Vevay -5:40:16 -	LMT	1883 Nov 18 12:19:44
950			-6:00	US	C%sT	1954 Apr 25  2:00
951			-5:00	-	EST	1969
952			-5:00	US	E%sT	1973
953			-5:00	-	EST	2006
954			-5:00	US	E%sT
955
956# Part of Kentucky left its clocks alone in 1974.
957# This also includes Clark, Floyd, and Harrison counties in Indiana.
958# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
959Rule Louisville	1921	only	-	May	1	2:00	1:00	D
960Rule Louisville	1921	only	-	Sep	1	2:00	0	S
961Rule Louisville	1941	1961	-	Apr	lastSun	2:00	1:00	D
962Rule Louisville	1941	only	-	Sep	lastSun	2:00	0	S
963Rule Louisville	1946	only	-	Jun	2	2:00	0	S
964Rule Louisville	1950	1955	-	Sep	lastSun	2:00	0	S
965Rule Louisville	1956	1960	-	Oct	lastSun	2:00	0	S
966# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
967Zone America/Kentucky/Louisville -5:43:02 -	LMT	1883 Nov 18 12:16:58
968			-6:00	US	C%sT	1921
969			-6:00 Louisville C%sT	1942
970			-6:00	US	C%sT	1946
971			-6:00 Louisville C%sT	1961 Jul 23  2:00
972			-5:00	-	EST	1968
973			-5:00	US	E%sT	1974 Jan  6  2:00
974			-6:00	1:00	CDT	1974 Oct 27  2:00
975			-5:00	US	E%sT
976#
977# Wayne County, Kentucky
978#
979# From Lake Cumberland LIFE
980# http://www.lake-cumberland.com/life/archive/news990129time.shtml
981# (1999-01-29) via WKYM-101.7:
982# Clinton County has joined Wayne County in asking the DoT to change from
983# the Central to the Eastern time zone....  The Wayne County government made
984# the same request in December.  And while Russell County officials have not
985# taken action, the majority of respondents to a poll conducted there in
986# August indicated they would like to change to "fast time" also.
987# The three Lake Cumberland counties are the farthest east of any U.S.
988# location in the Central time zone.
989#
990# From Rich Wales (2000-08-29):
991# After prolonged debate, and despite continuing deep differences of opinion,
992# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
993# (-0500) time.  They won't "fall back" this year.  See Sara Shipley,
994# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
995#
996# From Paul Eggert (2001-07-16):
997# The final rule was published in the
998# Federal Register 65, 160 (2000-08-17), pp 50154-50158.
999# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22
1000#
1001Zone America/Kentucky/Monticello -5:39:24 - LMT	1883 Nov 18 12:20:36
1002			-6:00	US	C%sT	1946
1003			-6:00	-	CST	1968
1004			-6:00	US	C%sT	2000 Oct 29  2:00
1005			-5:00	US	E%sT
1006
1007
1008# From Rives McDow (2000-08-30):
1009# Here ... are all the changes in the US since 1985.
1010# Kearny County, KS (put all of county on central;
1011#	previously split between MST and CST) ... 1990-10
1012# Starke County, IN (from CST to EST) ... 1991-10
1013# Oliver County, ND (from MST to CST) ... 1992-10
1014# West Wendover, NV (from PST TO MST) ... 1999-10
1015# Wayne County, KY (from CST to EST) ... 2000-10
1016#
1017# From Paul Eggert (2001-07-17):
1018# We don't know where the line used to be within Kearny County, KS,
1019# so omit that change for now.
1020# See America/Indiana/Knox for the Starke County, IN change.
1021# See America/North_Dakota/Center for the Oliver County, ND change.
1022# West Wendover, NV officially switched from Pacific to mountain time on
1023# 1999-10-31.  See the
1024# Federal Register 64, 203 (1999-10-21), pp 56705-56707.
1025# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15
1026# However, the Federal Register says that West Wendover already operated
1027# on mountain time, and the rule merely made this official;
1028# hence a separate tz entry is not needed.
1029
1030# Michigan
1031#
1032# From Bob Devine (1988-01-28):
1033# Michigan didn't observe DST from 1968 to 1973.
1034#
1035# From Paul Eggert (1999-03-31):
1036# Shanks writes that Michigan started using standard time on 1885-09-18,
1037# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01)
1038# that Detroit kept
1039#
1040#	local time until 1900 when the City Council decreed that clocks should
1041#	be put back twenty-eight minutes to Central Standard Time.  Half the
1042#	city obeyed, half refused.  After considerable debate, the decision
1043#	was rescinded and the city reverted to Sun time.  A derisive offer to
1044#	erect a sundial in front of the city hall was referred to the
1045#	Committee on Sewers.  Then, in 1905, Central time was adopted
1046#	by city vote.
1047#
1048# This story is too entertaining to be false, so go with Howse over Shanks.
1049#
1050# From Paul Eggert (2001-03-06):
1051# Garland (1927) writes "Cleveland and Detroit advanced their clocks
1052# one hour in 1914."  This change is not in Shanks.  We have no more
1053# info, so omit this for now.
1054#
1055# Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
1056# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
1057Rule	Detroit	1948	only	-	Apr	lastSun	2:00	1:00	D
1058Rule	Detroit	1948	only	-	Sep	lastSun	2:00	0	S
1059Rule	Detroit	1967	only	-	Jun	14	2:00	1:00	D
1060Rule	Detroit	1967	only	-	Oct	lastSun	2:00	0	S
1061# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1062Zone America/Detroit	-5:32:11 -	LMT	1905
1063			-6:00	-	CST	1915 May 15  2:00
1064			-5:00	-	EST	1942
1065			-5:00	US	E%sT	1946
1066			-5:00	Detroit	E%sT	1973
1067			-5:00	US	E%sT	1975
1068			-5:00	-	EST	1975 Apr 27  2:00
1069			-5:00	US	E%sT
1070#
1071# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan,
1072# switched from EST to CST/CDT in 1973.
1073# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
1074Rule Menominee	1946	only	-	Apr	lastSun	2:00	1:00	D
1075Rule Menominee	1946	only	-	Sep	lastSun	2:00	0	S
1076Rule Menominee	1966	only	-	Apr	lastSun	2:00	1:00	D
1077Rule Menominee	1966	only	-	Oct	lastSun	2:00	0	S
1078# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1079Zone America/Menominee	-5:50:27 -	LMT	1885 Sep 18 12:00
1080			-6:00	US	C%sT	1946
1081			-6:00 Menominee	C%sT	1969 Apr 27  2:00
1082			-5:00	-	EST	1973 Apr 29  2:00
1083			-6:00	US	C%sT
1084
1085# Navassa
1086# administered by the US Fish and Wildlife Service
1087# claimed by US under the provisions of the 1856 Guano Islands Act
1088# also claimed by Haiti
1089# occupied 1857/1900 by the Navassa Phosphate Co
1090# US lighthouse 1917/1996-09
1091# currently uninhabited
1092# see Mark Fineman, "An Isle Rich in Guano and Discord",
1093# _Los Angeles Times_ (1998-11-10), A1, A10; it cites
1094# Jimmy Skaggs, _The Great Guano Rush_ (1994).
1095
1096################################################################################
1097
1098
1099# From Paul Eggert (2017-02-10):
1100#
1101# Unless otherwise specified, the source for data through 1990 is:
1102# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
1103# San Diego: ACS Publications, Inc. (2003).
1104# Unfortunately this book contains many errors and cites no sources.
1105#
1106# Many years ago Gwillim Law wrote that a good source
1107# for time zone data was the International Air Transport
1108# Association's Standard Schedules Information Manual (IATA SSIM),
1109# published semiannually.  Law sent in several helpful summaries
1110# of the IATA's data after 1990.  Except where otherwise noted,
1111# IATA SSIM is the source for entries after 1990.
1112#
1113# Other sources occasionally used include:
1114#
1115#	Edward W. Whitman, World Time Differences,
1116#	Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
1117#	which I found in the UCLA library.
1118#
1119#	William Willett, The Waste of Daylight, 19th edition
1120#	<http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf>
1121#	[PDF] (1914-03)
1122#
1123#	Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
1124#	<http://www.jstor.org/stable/1774359>.
1125#
1126# See the 'europe' file for Greenland.
1127
1128# Canada
1129
1130# From Alain LaBont�� (1994-11-14):
1131# I post here the time zone abbreviations standardized in Canada
1132# for both English and French in the CAN/CSA-Z234.4-89 standard....
1133#
1134#	UTC	Standard time	Daylight saving time
1135#	offset	French	English	French	English
1136#	-2:30	-	-	HAT	NDT
1137#	-3	-	-	HAA	ADT
1138#	-3:30	HNT	NST	-	-
1139#	-4	HNA	AST	HAE	EDT
1140#	-5	HNE	EST	HAC	CDT
1141#	-6	HNC	CST	HAR	MDT
1142#	-7	HNR	MST	HAP	PDT
1143#	-8	HNP	PST	HAY	YDT
1144#	-9	HNY	YST	-	-
1145#
1146#	HN: Heure Normale	ST: Standard Time
1147#	HA: Heure Avanc��e	DT: Daylight saving Time
1148#
1149#	A: de l'Atlantique	Atlantic
1150#	C: du Centre		Central
1151#	E: de l'Est		Eastern
1152#	M:			Mountain
1153#	N:			Newfoundland
1154#	P: du Pacifique		Pacific
1155#	R: des Rocheuses
1156#	T: de Terre-Neuve
1157#	Y: du Yukon		Yukon
1158#
1159# From Paul Eggert (1994-11-22):
1160# Alas, this sort of thing must be handled by localization software.
1161
1162# Unless otherwise specified, the data entries for Canada are all from Shanks
1163# & Pottenger.
1164
1165# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31,
1166# 2007-03-01):
1167# The British Columbia government announced yesterday that it will
1168# adjust daylight savings next year to align with changes in the
1169# U.S. and the rest of Canada....
1170# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm
1171# ...
1172# Nova Scotia
1173# Daylight saving time will be extended by four weeks starting in 2007....
1174# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf
1175#
1176# [For New Brunswick] the new legislation dictates that the time change is to
1177# be done at 02:00 instead of 00:01.
1178# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf
1179# ...
1180# Manitoba has traditionally changed the clock every fall at 03:00.
1181# As of 2006, the transition is to take place one hour earlier at 02:00.
1182# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php
1183# ...
1184# [Alberta, Ontario, Quebec] will follow US rules.
1185# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM
1186# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm
1187# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF
1188# ...
1189# P.E.I. will follow US rules....
1190# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf
1191# ...
1192# Province of Newfoundland and Labrador....
1193# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm
1194# ...
1195# Yukon
1196# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf
1197# ...
1198# N.W.T. will follow US rules.  Whoever maintains the government web site
1199# does not seem to believe in bookmarks.  To see the news release, click the
1200# following link and search for "Daylight Savings Time Change".  Press the
1201# "Daylight Savings Time Change" link; it will fire off a popup using
1202# JavaScript.
1203# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive
1204# ...
1205# Nunavut
1206# An amendment to the Interpretation Act was registered on February 19/2007....
1207# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf
1208
1209# From Paul Eggert (2014-10-18):
1210# H. David Matthews and Mary Vincent's map
1211# "It's about TIME", _Canadian Geographic_ (September-October 1998)
1212# http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp
1213# contains detailed boundaries for regions observing nonstandard
1214# time and daylight saving time arrangements in Canada circa 1998.
1215#
1216# National Research Council Canada maintains info about time zones and DST.
1217# http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html
1218# http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5
1219# Its unofficial information is often taken from Matthews and Vincent.
1220
1221# From Paul Eggert (2006-06-27):
1222# For now, assume all of DST-observing Canada will fall into line with the
1223# new US DST rules,
1224
1225# From Chris Walton (2011-12-01)
1226# In the first of Tammy Hardwick's articles
1227# http://www.ilovecreston.com/?p=articles&t=spec&ar=260
1228# she quotes the Friday November 1/1918 edition of the Creston Review.
1229# The quote includes these two statements:
1230# 'Sunday the CPR went back to the old system of time...'
1231# '... The daylight saving scheme was dropped all over Canada at the same time,'
1232# These statements refer to a transition from daylight time to standard time
1233# that occurred nationally on Sunday October 27/1918.  This transition was
1234# also documented in the Saturday October 26/1918 edition of the Toronto Star.
1235
1236# In light of that evidence, we alter the date from the earlier believed
1237# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day
1238# than Thursday) in all Canadian rulesets.
1239
1240# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1241Rule	Canada	1918	only	-	Apr	14	2:00	1:00	D
1242Rule	Canada	1918	only	-	Oct	27	2:00	0	S
1243Rule	Canada	1942	only	-	Feb	 9	2:00	1:00	W # War
1244Rule	Canada	1945	only	-	Aug	14	23:00u	1:00	P # Peace
1245Rule	Canada	1945	only	-	Sep	30	2:00	0	S
1246Rule	Canada	1974	1986	-	Apr	lastSun	2:00	1:00	D
1247Rule	Canada	1974	2006	-	Oct	lastSun	2:00	0	S
1248Rule	Canada	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
1249Rule	Canada	2007	max	-	Mar	Sun>=8	2:00	1:00	D
1250Rule	Canada	2007	max	-	Nov	Sun>=1	2:00	0	S
1251
1252
1253# Newfoundland and Labrador
1254
1255# From Paul Eggert (2000-10-02):
1256# Matthews and Vincent (1998) write that Labrador should use NST/NDT,
1257# but the only part of Labrador that follows the rules is the
1258# southeast corner, including Port Hope Simpson and Mary's Harbour,
1259# but excluding, say, Black Tickle.
1260
1261# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1262Rule	StJohns	1917	only	-	Apr	 8	2:00	1:00	D
1263Rule	StJohns	1917	only	-	Sep	17	2:00	0	S
1264# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger.
1265Rule	StJohns	1919	only	-	May	 5	23:00	1:00	D
1266Rule	StJohns	1919	only	-	Aug	12	23:00	0	S
1267# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger.
1268Rule	StJohns	1920	1935	-	May	Sun>=1	23:00	1:00	D
1269Rule	StJohns	1920	1935	-	Oct	lastSun	23:00	0	S
1270# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks &
1271# Pottenger.
1272Rule	StJohns	1936	1941	-	May	Mon>=9	0:00	1:00	D
1273Rule	StJohns	1936	1941	-	Oct	Mon>=2	0:00	0	S
1274# Whitman gives the following transitions:
1275# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07
1276# but go with Shanks & Pottenger and assume they used Canadian rules.
1277# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
1278# Apr 30 - Sep 24; go with Shanks & Pottenger.
1279Rule	StJohns	1946	1950	-	May	Sun>=8	2:00	1:00	D
1280Rule	StJohns	1946	1950	-	Oct	Sun>=2	2:00	0	S
1281Rule	StJohns	1951	1986	-	Apr	lastSun	2:00	1:00	D
1282Rule	StJohns	1951	1959	-	Sep	lastSun	2:00	0	S
1283Rule	StJohns	1960	1986	-	Oct	lastSun	2:00	0	S
1284# From Paul Eggert (2000-10-02):
1285# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
1286# at 00:01 local time.  For now, assume it started in 1987.
1287
1288# From Michael Pelley (2011-09-12):
1289# We received today, Monday, September 12, 2011, notification that the
1290# changes to the Newfoundland Standard Time Act have been proclaimed.
1291# The change in the Act stipulates that the change from Daylight Savings
1292# Time to Standard Time and from Standard Time to Daylight Savings Time
1293# now occurs at 2:00AM.
1294# ...
1295# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm
1296# ...
1297# MICHAEL PELLEY  |  Manager of Enterprise Architecture - Solution Delivery
1298# Office of the Chief Information Officer
1299# Executive Council
1300# Government of Newfoundland & Labrador
1301
1302Rule	StJohns	1987	only	-	Apr	Sun>=1	0:01	1:00	D
1303Rule	StJohns	1987	2006	-	Oct	lastSun	0:01	0	S
1304Rule	StJohns	1988	only	-	Apr	Sun>=1	0:01	2:00	DD
1305Rule	StJohns	1989	2006	-	Apr	Sun>=1	0:01	1:00	D
1306Rule	StJohns	2007	2011	-	Mar	Sun>=8	0:01	1:00	D
1307Rule	StJohns	2007	2010	-	Nov	Sun>=1	0:01	0	S
1308#
1309# St John's has an apostrophe, but Posix file names can't have apostrophes.
1310# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1311Zone America/St_Johns	-3:30:52 -	LMT	1884
1312			-3:30:52 StJohns N%sT	1918
1313			-3:30:52 Canada	N%sT	1919
1314			-3:30:52 StJohns N%sT	1935 Mar 30
1315			-3:30	StJohns	N%sT	1942 May 11
1316			-3:30	Canada	N%sT	1946
1317			-3:30	StJohns	N%sT	2011 Nov
1318			-3:30	Canada	N%sT
1319
1320# most of east Labrador
1321
1322# The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'.
1323# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1324Zone America/Goose_Bay	-4:01:40 -	LMT	1884 # Happy Valley-Goose Bay
1325			-3:30:52 -	NST	1918
1326			-3:30:52 Canada N%sT	1919
1327			-3:30:52 -	NST	1935 Mar 30
1328			-3:30	-	NST	1936
1329			-3:30	StJohns	N%sT	1942 May 11
1330			-3:30	Canada	N%sT	1946
1331			-3:30	StJohns	N%sT	1966 Mar 15  2:00
1332			-4:00	StJohns	A%sT	2011 Nov
1333			-4:00	Canada	A%sT
1334
1335
1336# west Labrador, Nova Scotia, Prince Edward I
1337
1338# From Brian Inglis (2015-07-20):
1339# From the historical weather station records available at:
1340# https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada
1341# Sydney shares the same time history as Glace Bay, so was
1342# likely to be the same across the island....
1343# Sydney, as the capital and most populous location, or Cape Breton, would
1344# have been better names for the zone had we known this in 1996.
1345
1346# From Paul Eggert (2015-07-20):
1347# Shanks & Pottenger write that since 1970 most of this region has been like
1348# Halifax.  Many locales did not observe peacetime DST until 1972;
1349# the Cape Breton area, represented by Glace Bay, is the largest we know of
1350# (Glace Bay was perhaps not the best name choice but no point changing now).
1351# Shanks & Pottenger also write that Liverpool, NS was the only town
1352# in Canada to observe DST in 1971 but not 1970; for now we'll assume
1353# this is a typo.
1354
1355# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1356Rule	Halifax	1916	only	-	Apr	 1	0:00	1:00	D
1357Rule	Halifax	1916	only	-	Oct	 1	0:00	0	S
1358Rule	Halifax	1920	only	-	May	 9	0:00	1:00	D
1359Rule	Halifax	1920	only	-	Aug	29	0:00	0	S
1360Rule	Halifax	1921	only	-	May	 6	0:00	1:00	D
1361Rule	Halifax	1921	1922	-	Sep	 5	0:00	0	S
1362Rule	Halifax	1922	only	-	Apr	30	0:00	1:00	D
1363Rule	Halifax	1923	1925	-	May	Sun>=1	0:00	1:00	D
1364Rule	Halifax	1923	only	-	Sep	 4	0:00	0	S
1365Rule	Halifax	1924	only	-	Sep	15	0:00	0	S
1366Rule	Halifax	1925	only	-	Sep	28	0:00	0	S
1367Rule	Halifax	1926	only	-	May	16	0:00	1:00	D
1368Rule	Halifax	1926	only	-	Sep	13	0:00	0	S
1369Rule	Halifax	1927	only	-	May	 1	0:00	1:00	D
1370Rule	Halifax	1927	only	-	Sep	26	0:00	0	S
1371Rule	Halifax	1928	1931	-	May	Sun>=8	0:00	1:00	D
1372Rule	Halifax	1928	only	-	Sep	 9	0:00	0	S
1373Rule	Halifax	1929	only	-	Sep	 3	0:00	0	S
1374Rule	Halifax	1930	only	-	Sep	15	0:00	0	S
1375Rule	Halifax	1931	1932	-	Sep	Mon>=24	0:00	0	S
1376Rule	Halifax	1932	only	-	May	 1	0:00	1:00	D
1377Rule	Halifax	1933	only	-	Apr	30	0:00	1:00	D
1378Rule	Halifax	1933	only	-	Oct	 2	0:00	0	S
1379Rule	Halifax	1934	only	-	May	20	0:00	1:00	D
1380Rule	Halifax	1934	only	-	Sep	16	0:00	0	S
1381Rule	Halifax	1935	only	-	Jun	 2	0:00	1:00	D
1382Rule	Halifax	1935	only	-	Sep	30	0:00	0	S
1383Rule	Halifax	1936	only	-	Jun	 1	0:00	1:00	D
1384Rule	Halifax	1936	only	-	Sep	14	0:00	0	S
1385Rule	Halifax	1937	1938	-	May	Sun>=1	0:00	1:00	D
1386Rule	Halifax	1937	1941	-	Sep	Mon>=24	0:00	0	S
1387Rule	Halifax	1939	only	-	May	28	0:00	1:00	D
1388Rule	Halifax	1940	1941	-	May	Sun>=1	0:00	1:00	D
1389Rule	Halifax	1946	1949	-	Apr	lastSun	2:00	1:00	D
1390Rule	Halifax	1946	1949	-	Sep	lastSun	2:00	0	S
1391Rule	Halifax	1951	1954	-	Apr	lastSun	2:00	1:00	D
1392Rule	Halifax	1951	1954	-	Sep	lastSun	2:00	0	S
1393Rule	Halifax	1956	1959	-	Apr	lastSun	2:00	1:00	D
1394Rule	Halifax	1956	1959	-	Sep	lastSun	2:00	0	S
1395Rule	Halifax	1962	1973	-	Apr	lastSun	2:00	1:00	D
1396Rule	Halifax	1962	1973	-	Oct	lastSun	2:00	0	S
1397# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1398Zone America/Halifax	-4:14:24 -	LMT	1902 Jun 15
1399			-4:00	Halifax	A%sT	1918
1400			-4:00	Canada	A%sT	1919
1401			-4:00	Halifax	A%sT	1942 Feb  9  2:00s
1402			-4:00	Canada	A%sT	1946
1403			-4:00	Halifax	A%sT	1974
1404			-4:00	Canada	A%sT
1405Zone America/Glace_Bay	-3:59:48 -	LMT	1902 Jun 15
1406			-4:00	Canada	A%sT	1953
1407			-4:00	Halifax	A%sT	1954
1408			-4:00	-	AST	1972
1409			-4:00	Halifax	A%sT	1974
1410			-4:00	Canada	A%sT
1411
1412# New Brunswick
1413
1414# From Paul Eggert (2007-01-31):
1415# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>
1416# says they changed at 00:01 through 2006, and
1417# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
1418# clear that this was the case since at least 1993.
1419# For now, assume it started in 1993.
1420
1421# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1422Rule	Moncton	1933	1935	-	Jun	Sun>=8	1:00	1:00	D
1423Rule	Moncton	1933	1935	-	Sep	Sun>=8	1:00	0	S
1424Rule	Moncton	1936	1938	-	Jun	Sun>=1	1:00	1:00	D
1425Rule	Moncton	1936	1938	-	Sep	Sun>=1	1:00	0	S
1426Rule	Moncton	1939	only	-	May	27	1:00	1:00	D
1427Rule	Moncton	1939	1941	-	Sep	Sat>=21	1:00	0	S
1428Rule	Moncton	1940	only	-	May	19	1:00	1:00	D
1429Rule	Moncton	1941	only	-	May	 4	1:00	1:00	D
1430Rule	Moncton	1946	1972	-	Apr	lastSun	2:00	1:00	D
1431Rule	Moncton	1946	1956	-	Sep	lastSun	2:00	0	S
1432Rule	Moncton	1957	1972	-	Oct	lastSun	2:00	0	S
1433Rule	Moncton	1993	2006	-	Apr	Sun>=1	0:01	1:00	D
1434Rule	Moncton	1993	2006	-	Oct	lastSun	0:01	0	S
1435# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1436Zone America/Moncton	-4:19:08 -	LMT	1883 Dec  9
1437			-5:00	-	EST	1902 Jun 15
1438			-4:00	Canada	A%sT	1933
1439			-4:00	Moncton	A%sT	1942
1440			-4:00	Canada	A%sT	1946
1441			-4:00	Moncton	A%sT	1973
1442			-4:00	Canada	A%sT	1993
1443			-4:00	Moncton	A%sT	2007
1444			-4:00	Canada	A%sT
1445
1446# Quebec
1447
1448# From Paul Eggert (2015-03-24):
1449# See America/Toronto for most of Quebec, including Montreal.
1450#
1451# Matthews and Vincent (1998) also write that Quebec east of the -63
1452# meridian is supposed to observe AST, but residents as far east as
1453# Natashquan use EST/EDT, and residents east of Natashquan use AST.
1454# The Quebec department of justice writes in
1455# "The situation in Minganie and Basse-C��te-Nord"
1456# http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm
1457# that the coastal strip from just east of Natashquan to Blanc-Sablon
1458# observes Atlantic standard time all year round.
1459# http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en
1460# says this common practice was codified into law as of 2007.
1461# For lack of better info, guess this practice began around 1970, contra to
1462# Shanks & Pottenger who have this region observing AST/ADT.
1463
1464# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1465Zone America/Blanc-Sablon -3:48:28 -	LMT	1884
1466			-4:00	Canada	A%sT	1970
1467			-4:00	-	AST
1468
1469# Ontario
1470
1471# From Paul Eggert (2006-07-09):
1472# Shanks & Pottenger write that since 1970 most of Ontario has been like
1473# Toronto.
1474# Thunder Bay skipped DST in 1973.
1475# Many smaller locales did not observe peacetime DST until 1974;
1476# Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1477# Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
1478
1479# From Mark Brader (2003-07-26):
1480# [According to the Toronto Star] Orillia, Ontario, adopted DST
1481# effective Saturday, 1912-06-22, 22:00; the article mentions that
1482# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
1483# have already done so.  In Orillia DST was to run until Saturday,
1484# 1912-08-31 (no time mentioned), but it was met with considerable
1485# hostility from certain segments of the public, and was revoked after
1486# only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but
1487# presumably that should be -07-06.  (1912-06-19, -07-12; also letters
1488# earlier in June).
1489#
1490# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).
1491
1492# From Paul Eggert (1997-10-17):
1493# Mark Brader writes that an article in the 1997-10-14 Toronto Star
1494# says that Atikokan, Ontario currently does not observe DST,
1495# but will vote on 11-10 whether to use EST/EDT.
1496# He also writes that the Ontario Time Act (1990, Chapter T.9)
1497# http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html
1498# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.
1499# Officially Atikokan is therefore on CST/CDT, and most likely this report
1500# concerns a non-official time observed as a matter of local practice.
1501#
1502# From Paul Eggert (2000-10-02):
1503# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and
1504# New Osnaburgh observe CST all year, that Big Trout Lake observes
1505# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in
1506# violation of the official Ontario rules.
1507#
1508# From Paul Eggert (2006-07-09):
1509# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the
1510# 2005-07-21 Chronicle-Journal, which said:
1511#
1512#	The clocks in Atikokan stay set on standard time year-round.
1513#	This means they spend about half the time on central time and
1514#	the other half on eastern time.
1515#
1516#	For the most part, the system works, Mayor Dennis Brown said.
1517#
1518#	"The majority of businesses in Atikokan deal more with Eastern
1519#	Canada, but there are some that deal with Western Canada," he
1520#	said.  "I don't see any changes happening here."
1521#
1522# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang
1523# [New Osnaburgh] follow the same practice."
1524
1525# From Garry McKinnon (2006-07-14) via Chris Walton:
1526# I chatted with a member of my board who has an outstanding memory
1527# and a long history in Atikokan (and in the telecom industry) and he
1528# can say for certain that Atikokan has been practicing the current
1529# time keeping since 1952, at least.
1530
1531# From Paul Eggert (2006-07-17):
1532# Shanks & Pottenger say that Atikokan has agreed with Rainy River
1533# ever since standard time was introduced, but the information from
1534# McKinnon sounds more authoritative.  For now, assume that Atikokan
1535# switched to EST immediately after WWII era daylight saving time
1536# ended.  This matches the old (less-populous) America/Coral_Harbour
1537# entry since our cutoff date of 1970, so we can move
1538# America/Coral_Harbour to the 'backward' file.
1539
1540# From Mark Brader (2010-03-06):
1541#
1542# Currently the database has:
1543#
1544# # Ontario
1545#
1546# # From Paul Eggert (2006-07-09):
1547# # Shanks & Pottenger write that since 1970 most of Ontario has been like
1548# # Toronto.
1549# # Thunder Bay skipped DST in 1973.
1550# # Many smaller locales did not observe peacetime DST until 1974;
1551# # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1552#
1553# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom
1554# right corner of page 1, it says that Toronto will return to standard
1555# time at 2 am Sunday morning (which agrees with the database), and that:
1556#
1557#     The one-hour setback will go into effect throughout most of Ontario,
1558#     except in areas like Windsor which remains on standard time all year.
1559#
1560# Windsor is, of course, a lot larger than Nipigon.
1561#
1562# I only came across this incidentally.  I don't know if Windsor began
1563# observing DST when Detroit did, or in 1974, or on some other date.
1564#
1565# By the way, the article continues by noting that:
1566#
1567#     Some cities in the United States have pushed the deadline back
1568#     three weeks and will change over from daylight saving in October.
1569
1570# From Arthur David Olson (2010-07-17):
1571#
1572# "Standard Time and Time Zones in Canada" appeared in
1573# The Journal of The Royal Astronomical Society of Canada,
1574# volume 26, number 2 (February 1932) and, as of 2010-07-17,
1575# was available at
1576# http://adsabs.harvard.edu/full/1932JRASC..26...49S
1577#
1578# It includes the text below (starting on page 57):
1579#
1580#   A list of the places in Canada using daylight saving time would
1581# require yearly revision. From information kindly furnished by
1582# the provincial governments and by the postmasters in many cities
1583# and towns, it is found that the following places used daylight sav-
1584# ing in 1930. The information for the province of Quebec is definite,
1585# for the other provinces only approximate:
1586#
1587#	Province	Daylight saving time used
1588# Prince Edward Island	Not used.
1589# Nova Scotia		In Halifax only.
1590# New Brunswick		In St. John only.
1591# Quebec		In the following places:
1592#			Montreal	Lachine
1593#			Quebec		Mont-Royal
1594#			L��vis		Iberville
1595#			St. Lambert	Cap de la Madel��ine
1596#			Verdun		Loretteville
1597#			Westmount	Richmond
1598#			Outremont	St. J��r��me
1599#			Longueuil	Greenfield Park
1600#			Arvida		Waterloo
1601#			Chambly-Canton	Beaulieu
1602#			Melbourne	La Tuque
1603#			St. Th��ophile	Buckingham
1604# Ontario		Used generally in the cities and towns along
1605#			the southerly part of the province. Not
1606#			used in the northwesterly part.
1607# Manitoba		Not used.
1608# Saskatchewan		In Regina only.
1609# Alberta		Not used.
1610# British Columbia	Not used.
1611#
1612#   With some exceptions, the use of daylight saving may be said to be limited
1613# to those cities and towns lying between Quebec city and Windsor, Ont.
1614
1615# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1616Rule	Toronto	1919	only	-	Mar	30	23:30	1:00	D
1617Rule	Toronto	1919	only	-	Oct	26	0:00	0	S
1618Rule	Toronto	1920	only	-	May	 2	2:00	1:00	D
1619Rule	Toronto	1920	only	-	Sep	26	0:00	0	S
1620Rule	Toronto	1921	only	-	May	15	2:00	1:00	D
1621Rule	Toronto	1921	only	-	Sep	15	2:00	0	S
1622Rule	Toronto	1922	1923	-	May	Sun>=8	2:00	1:00	D
1623# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
1624# was meant.
1625Rule	Toronto	1922	1926	-	Sep	Sun>=15	2:00	0	S
1626Rule	Toronto	1924	1927	-	May	Sun>=1	2:00	1:00	D
1627# The 1927-to-1939 rules can be expressed more simply as
1628# Rule	Toronto	1927	1937	-	Sep	Sun>=25	2:00	0	S
1629# Rule	Toronto	1928	1937	-	Apr	Sun>=25	2:00	1:00	D
1630# Rule	Toronto	1938	1940	-	Apr	lastSun	2:00	1:00	D
1631# Rule	Toronto	1938	1939	-	Sep	lastSun	2:00	0	S
1632# The rules below avoid use of Sun>=25
1633# (which pre-2004 versions of zic cannot handle).
1634Rule	Toronto	1927	1932	-	Sep	lastSun	2:00	0	S
1635Rule	Toronto	1928	1931	-	Apr	lastSun	2:00	1:00	D
1636Rule	Toronto	1932	only	-	May	1	2:00	1:00	D
1637Rule	Toronto	1933	1940	-	Apr	lastSun	2:00	1:00	D
1638Rule	Toronto	1933	only	-	Oct	1	2:00	0	S
1639Rule	Toronto	1934	1939	-	Sep	lastSun	2:00	0	S
1640Rule	Toronto	1945	1946	-	Sep	lastSun	2:00	0	S
1641Rule	Toronto	1946	only	-	Apr	lastSun	2:00	1:00	D
1642Rule	Toronto	1947	1949	-	Apr	lastSun	0:00	1:00	D
1643Rule	Toronto	1947	1948	-	Sep	lastSun	0:00	0	S
1644Rule	Toronto	1949	only	-	Nov	lastSun	0:00	0	S
1645Rule	Toronto	1950	1973	-	Apr	lastSun	2:00	1:00	D
1646Rule	Toronto	1950	only	-	Nov	lastSun	2:00	0	S
1647Rule	Toronto	1951	1956	-	Sep	lastSun	2:00	0	S
1648# Shanks & Pottenger say Toronto ended DST a week early in 1971,
1649# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this
1650# is wrong, and that he had confirmed it by checking the 1971-10-30
1651# Toronto Star, which said that DST was ending 1971-10-31 as usual.
1652Rule	Toronto	1957	1973	-	Oct	lastSun	2:00	0	S
1653
1654# From Paul Eggert (2003-07-27):
1655# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and
1656# Port Arthur, Ontario, the principle of the Bill has been in
1657# operation for the past three years, and in the City of Moose Jaw,
1658# Saskatchewan, for one year."
1659
1660# From David Bryan via Tory Tronrud, Director/Curator,
1661# Thunder Bay Museum (2003-11-12):
1662# There is some suggestion, however, that, by-law or not, daylight
1663# savings time was being practiced in Fort William and Port Arthur
1664# before 1909.... [I]n 1910, the line between the Eastern and Central
1665# Time Zones was permanently moved about two hundred miles west to
1666# include the Thunder Bay area....  When Canada adopted daylight
1667# savings time in 1916, Fort William and Port Arthur, having done so
1668# already, did not change their clocks....  During the Second World
1669# War,... [t]he cities agreed to implement DST during the summer
1670# months for the remainder of the war years.
1671
1672# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1673Zone America/Toronto	-5:17:32 -	LMT	1895
1674			-5:00	Canada	E%sT	1919
1675			-5:00	Toronto	E%sT	1942 Feb  9  2:00s
1676			-5:00	Canada	E%sT	1946
1677			-5:00	Toronto	E%sT	1974
1678			-5:00	Canada	E%sT
1679Zone America/Thunder_Bay -5:57:00 -	LMT	1895
1680			-6:00	-	CST	1910
1681			-5:00	-	EST	1942
1682			-5:00	Canada	E%sT	1970
1683			-5:00	Toronto	E%sT	1973
1684			-5:00	-	EST	1974
1685			-5:00	Canada	E%sT
1686Zone America/Nipigon	-5:53:04 -	LMT	1895
1687			-5:00	Canada	E%sT	1940 Sep 29
1688			-5:00	1:00	EDT	1942 Feb  9  2:00s
1689			-5:00	Canada	E%sT
1690Zone America/Rainy_River -6:18:16 -	LMT	1895
1691			-6:00	Canada	C%sT	1940 Sep 29
1692			-6:00	1:00	CDT	1942 Feb  9  2:00s
1693			-6:00	Canada	C%sT
1694Zone America/Atikokan	-6:06:28 -	LMT	1895
1695			-6:00	Canada	C%sT	1940 Sep 29
1696			-6:00	1:00	CDT	1942 Feb  9  2:00s
1697			-6:00	Canada	C%sT	1945 Sep 30  2:00
1698			-5:00	-	EST
1699
1700
1701# Manitoba
1702
1703# From Rob Douglas (2006-04-06):
1704# the old Manitoba Time Act - as amended by Bill 2, assented to
1705# March 27, 1987 ... said ...
1706# "between two o'clock Central Standard Time in the morning of
1707# the first Sunday of April of each year and two o'clock Central
1708# Standard Time in the morning of the last Sunday of October next
1709# following, one hour in advance of Central Standard Time."...
1710# I believe that the English legislation [of the old time act] had
1711# been assented to (March 22, 1967)....
1712# Also, as far as I can tell, there was no order-in-council varying
1713# the time of Daylight Saving Time for 2005 and so the provisions of
1714# the 1987 version would apply - the changeover was at 2:00 Central
1715# Standard Time (i.e. not until 3:00 Central Daylight Time).
1716
1717# From Paul Eggert (2006-04-10):
1718# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s)
1719# starting 1966.  Since 02:00s is clearly correct for 1967 on, assume
1720# it was also 02:00s in 1966.
1721
1722# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1723Rule	Winn	1916	only	-	Apr	23	0:00	1:00	D
1724Rule	Winn	1916	only	-	Sep	17	0:00	0	S
1725Rule	Winn	1918	only	-	Apr	14	2:00	1:00	D
1726Rule	Winn	1918	only	-	Oct	27	2:00	0	S
1727Rule	Winn	1937	only	-	May	16	2:00	1:00	D
1728Rule	Winn	1937	only	-	Sep	26	2:00	0	S
1729Rule	Winn	1942	only	-	Feb	 9	2:00	1:00	W # War
1730Rule	Winn	1945	only	-	Aug	14	23:00u	1:00	P # Peace
1731Rule	Winn	1945	only	-	Sep	lastSun	2:00	0	S
1732Rule	Winn	1946	only	-	May	12	2:00	1:00	D
1733Rule	Winn	1946	only	-	Oct	13	2:00	0	S
1734Rule	Winn	1947	1949	-	Apr	lastSun	2:00	1:00	D
1735Rule	Winn	1947	1949	-	Sep	lastSun	2:00	0	S
1736Rule	Winn	1950	only	-	May	 1	2:00	1:00	D
1737Rule	Winn	1950	only	-	Sep	30	2:00	0	S
1738Rule	Winn	1951	1960	-	Apr	lastSun	2:00	1:00	D
1739Rule	Winn	1951	1958	-	Sep	lastSun	2:00	0	S
1740Rule	Winn	1959	only	-	Oct	lastSun	2:00	0	S
1741Rule	Winn	1960	only	-	Sep	lastSun	2:00	0	S
1742Rule	Winn	1963	only	-	Apr	lastSun	2:00	1:00	D
1743Rule	Winn	1963	only	-	Sep	22	2:00	0	S
1744Rule	Winn	1966	1986	-	Apr	lastSun	2:00s	1:00	D
1745Rule	Winn	1966	2005	-	Oct	lastSun	2:00s	0	S
1746Rule	Winn	1987	2005	-	Apr	Sun>=1	2:00s	1:00	D
1747# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1748Zone America/Winnipeg	-6:28:36 -	LMT	1887 Jul 16
1749			-6:00	Winn	C%sT	2006
1750			-6:00	Canada	C%sT
1751
1752
1753# Saskatchewan
1754
1755# From Mark Brader (2003-07-26):
1756# The first actual adoption of DST in Canada was at the municipal
1757# level.  As the [Toronto] Star put it (1912-06-07), "While people
1758# elsewhere have long been talking of legislation to save daylight,
1759# the city of Moose Jaw [Saskatchewan] has acted on its own hook."
1760# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
1761# presumably late evening, as below), and would run until "the end of
1762# the summer".  The discrepancy between municipal time and railroad
1763# time was noted.
1764
1765# From Paul Eggert (2003-07-27):
1766# Willett (1914-03) notes that DST "has been in operation ... in the
1767# City of Moose Jaw, Saskatchewan, for one year."
1768
1769# From Paul Eggert (2006-03-22):
1770# Shanks & Pottenger say that since 1970 this region has mostly been as Regina.
1771# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
1772# Other western towns (e.g. Lloydminster) are like Edmonton.
1773# Matthews and Vincent (1998) write that Denare Beach and Creighton
1774# are like Winnipeg, in violation of Saskatchewan law.
1775
1776# From W. Jones (1992-11-06):
1777# The. . .below is based on information I got from our law library, the
1778# provincial archives, and the provincial Community Services department.
1779# A precise history would require digging through newspaper archives, and
1780# since you didn't say what you wanted, I didn't bother.
1781#
1782# Saskatchewan is split by a time zone meridian (105W) and over the years
1783# the boundary became pretty ragged as communities near it reevaluated
1784# their affiliations in one direction or the other.  In 1965 a provincial
1785# referendum favoured legislating common time practices.
1786#
1787# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
1788# Saskatchewan 1978) was proclaimed, and established that the eastern
1789# part of Saskatchewan would use CST year round, that districts in
1790# northwest Saskatchewan would by default follow CST but could opt to
1791# follow Mountain Time rules (thus 1 hour difference in the winter and
1792# zero in the summer), and that districts in southwest Saskatchewan would
1793# by default follow MT but could opt to follow CST.
1794#
1795# It took a few years for the dust to settle (I know one story of a town
1796# on one time zone having its school in another, such that a mom had to
1797# serve her family lunch in two shifts), but presently it seems that only
1798# a few towns on the border with Alberta (e.g. Lloydminster) follow MT
1799# rules any more; all other districts appear to have used CST year round
1800# since sometime in the 1960s.
1801
1802# From Chris Walton (2006-06-26):
1803# The Saskatchewan time act which was last updated in 1996 is about 30 pages
1804# long and rather painful to read.
1805# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf
1806
1807# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1808Rule	Regina	1918	only	-	Apr	14	2:00	1:00	D
1809Rule	Regina	1918	only	-	Oct	27	2:00	0	S
1810Rule	Regina	1930	1934	-	May	Sun>=1	0:00	1:00	D
1811Rule	Regina	1930	1934	-	Oct	Sun>=1	0:00	0	S
1812Rule	Regina	1937	1941	-	Apr	Sun>=8	0:00	1:00	D
1813Rule	Regina	1937	only	-	Oct	Sun>=8	0:00	0	S
1814Rule	Regina	1938	only	-	Oct	Sun>=1	0:00	0	S
1815Rule	Regina	1939	1941	-	Oct	Sun>=8	0:00	0	S
1816Rule	Regina	1942	only	-	Feb	 9	2:00	1:00	W # War
1817Rule	Regina	1945	only	-	Aug	14	23:00u	1:00	P # Peace
1818Rule	Regina	1945	only	-	Sep	lastSun	2:00	0	S
1819Rule	Regina	1946	only	-	Apr	Sun>=8	2:00	1:00	D
1820Rule	Regina	1946	only	-	Oct	Sun>=8	2:00	0	S
1821Rule	Regina	1947	1957	-	Apr	lastSun	2:00	1:00	D
1822Rule	Regina	1947	1957	-	Sep	lastSun	2:00	0	S
1823Rule	Regina	1959	only	-	Apr	lastSun	2:00	1:00	D
1824Rule	Regina	1959	only	-	Oct	lastSun	2:00	0	S
1825#
1826Rule	Swift	1957	only	-	Apr	lastSun	2:00	1:00	D
1827Rule	Swift	1957	only	-	Oct	lastSun	2:00	0	S
1828Rule	Swift	1959	1961	-	Apr	lastSun	2:00	1:00	D
1829Rule	Swift	1959	only	-	Oct	lastSun	2:00	0	S
1830Rule	Swift	1960	1961	-	Sep	lastSun	2:00	0	S
1831# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1832Zone America/Regina	-6:58:36 -	LMT	1905 Sep
1833			-7:00	Regina	M%sT	1960 Apr lastSun  2:00
1834			-6:00	-	CST
1835Zone America/Swift_Current -7:11:20 -	LMT	1905 Sep
1836			-7:00	Canada	M%sT	1946 Apr lastSun  2:00
1837			-7:00	Regina	M%sT	1950
1838			-7:00	Swift	M%sT	1972 Apr lastSun  2:00
1839			-6:00	-	CST
1840
1841
1842# Alberta
1843
1844# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1845Rule	Edm	1918	1919	-	Apr	Sun>=8	2:00	1:00	D
1846Rule	Edm	1918	only	-	Oct	27	2:00	0	S
1847Rule	Edm	1919	only	-	May	27	2:00	0	S
1848Rule	Edm	1920	1923	-	Apr	lastSun	2:00	1:00	D
1849Rule	Edm	1920	only	-	Oct	lastSun	2:00	0	S
1850Rule	Edm	1921	1923	-	Sep	lastSun	2:00	0	S
1851Rule	Edm	1942	only	-	Feb	 9	2:00	1:00	W # War
1852Rule	Edm	1945	only	-	Aug	14	23:00u	1:00	P # Peace
1853Rule	Edm	1945	only	-	Sep	lastSun	2:00	0	S
1854Rule	Edm	1947	only	-	Apr	lastSun	2:00	1:00	D
1855Rule	Edm	1947	only	-	Sep	lastSun	2:00	0	S
1856Rule	Edm	1967	only	-	Apr	lastSun	2:00	1:00	D
1857Rule	Edm	1967	only	-	Oct	lastSun	2:00	0	S
1858Rule	Edm	1969	only	-	Apr	lastSun	2:00	1:00	D
1859Rule	Edm	1969	only	-	Oct	lastSun	2:00	0	S
1860Rule	Edm	1972	1986	-	Apr	lastSun	2:00	1:00	D
1861Rule	Edm	1972	2006	-	Oct	lastSun	2:00	0	S
1862# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1863Zone America/Edmonton	-7:33:52 -	LMT	1906 Sep
1864			-7:00	Edm	M%sT	1987
1865			-7:00	Canada	M%sT
1866
1867
1868# British Columbia
1869
1870# From Paul Eggert (2006-03-22):
1871# Shanks & Pottenger write that since 1970 most of this region has
1872# been like Vancouver.
1873# Dawson Creek uses MST.  Much of east BC is like Edmonton.
1874# Matthews and Vincent (1998) write that Creston is like Dawson Creek.
1875
1876# It seems though that (re: Creston) is not entirely correct:
1877
1878# From Chris Walton (2011-12-01):
1879# There are two areas within the Canadian province of British Columbia
1880# that do not currently observe daylight saving:
1881# a) The Creston Valley (includes the town of Creston and surrounding area)
1882# b) The eastern half of the Peace River Regional District
1883# (includes the cities of Dawson Creek and Fort St. John)
1884
1885# Earlier this year I stumbled across a detailed article about the time
1886# keeping history of Creston; it was written by Tammy Hardwick who is the
1887# manager of the Creston & District Museum. The article was written in May 2009.
1888# http://www.ilovecreston.com/?p=articles&t=spec&ar=260
1889# According to the article, Creston has not changed its clocks since June 1918.
1890# i.e. Creston has been stuck on UTC-7 for 93 years.
1891# Dawson Creek, on the other hand, changed its clocks as recently as April 1972.
1892
1893# Unfortunately the exact date for the time change in June 1918 remains
1894# unknown and will be difficult to ascertain.  I e-mailed Tammy a few months
1895# ago to ask if Sunday June 2 was a reasonable guess.  She said it was just
1896# as plausible as any other date (in June).  She also said that after writing
1897# the article she had discovered another time change in 1916; this is the
1898# subject of another article which she wrote in October 2010.
1899# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56
1900
1901# Here is a summary of the three clock change events in Creston's history:
1902# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7)
1903# Exact date unknown
1904# 2. Oct 1916: switch to Pacific Standard Time (GMT-8)
1905# Exact date in October unknown; Sunday October 1 is a reasonable guess.
1906# 3. June 1918: switch to Pacific Daylight Time (GMT-7)
1907# Exact date in June unknown; Sunday June 2 is a reasonable guess.
1908# note 1:
1909# On Oct 27/1918 when daylight saving ended in the rest of Canada,
1910# Creston did not change its clocks.
1911# note 2:
1912# During WWII when the Federal Government legislated a mandatory clock change,
1913# Creston did not oblige.
1914# note 3:
1915# There is no guarantee that Creston will remain on Mountain Standard Time
1916# (UTC-7) forever.
1917# The subject was debated at least once this year by the town Council.
1918# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html
1919
1920# During a period WWII, summer time (Daylight saying) was mandatory in Canada.
1921# In Creston, that was handled by shifting the area to PST (-8:00) then applying
1922# summer time to cause the offset to be -7:00, the same as it had been before
1923# the change.  It can be argued that the timezone abbreviation during this
1924# period should be PDT rather than MST, but that doesn't seem important enough
1925# (to anyone) to further complicate the rules.
1926
1927# The transition dates (and times) are guesses.
1928
1929# From Matt Johnson (2015-09-21):
1930# Fort Nelson, BC, Canada will cancel DST this year.  So while previously they
1931# were aligned with America/Vancouver, they're now aligned with
1932# America/Dawson_Creek.
1933# http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html
1934#
1935# From Tim Parenti (2015-09-23):
1936# This requires a new zone for the Northern Rockies Regional Municipality,
1937# America/Fort_Nelson.  The resolution of 2014-12-08 was reached following a
1938# 2014-11-15 poll with nearly 75% support.  Effectively, the municipality has
1939# been on MST (-0700) like Dawson Creek since it advanced its clocks on
1940# 2015-03-08.
1941#
1942# From Paul Eggert (2015-09-23):
1943# Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver.
1944
1945# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1946Rule	Vanc	1918	only	-	Apr	14	2:00	1:00	D
1947Rule	Vanc	1918	only	-	Oct	27	2:00	0	S
1948Rule	Vanc	1942	only	-	Feb	 9	2:00	1:00	W # War
1949Rule	Vanc	1945	only	-	Aug	14	23:00u	1:00	P # Peace
1950Rule	Vanc	1945	only	-	Sep	30	2:00	0	S
1951Rule	Vanc	1946	1986	-	Apr	lastSun	2:00	1:00	D
1952Rule	Vanc	1946	only	-	Oct	13	2:00	0	S
1953Rule	Vanc	1947	1961	-	Sep	lastSun	2:00	0	S
1954Rule	Vanc	1962	2006	-	Oct	lastSun	2:00	0	S
1955# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1956Zone America/Vancouver	-8:12:28 -	LMT	1884
1957			-8:00	Vanc	P%sT	1987
1958			-8:00	Canada	P%sT
1959Zone America/Dawson_Creek -8:00:56 -	LMT	1884
1960			-8:00	Canada	P%sT	1947
1961			-8:00	Vanc	P%sT	1972 Aug 30  2:00
1962			-7:00	-	MST
1963Zone America/Fort_Nelson	-8:10:47 -	LMT	1884
1964			-8:00	Vanc	P%sT	1946
1965			-8:00	-	PST	1947
1966			-8:00	Vanc	P%sT	1987
1967			-8:00	Canada	P%sT	2015 Mar  8  2:00
1968			-7:00	-	MST
1969Zone America/Creston	-7:46:04 -	LMT	1884
1970			-7:00	-	MST	1916 Oct 1
1971			-8:00	-	PST	1918 Jun 2
1972			-7:00	-	MST
1973
1974# Northwest Territories, Nunavut, Yukon
1975
1976# From Paul Eggert (2006-03-22):
1977# Dawson switched to PST in 1973.  Inuvik switched to MST in 1979.
1978# Mathew Englander (1996-10-07) gives the following refs:
1979#	* 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
1980#	c. 7 defines Yukon standard time as UTC-9....
1981#	see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
1982#	[http://canlii.ca/t/7vhg]
1983#	* C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
1984#	* O.I.C. 1980/02 established DST.
1985#	* O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
1986
1987# From Brian Inglis (2015-04-14):
1988#
1989# I tried to trace the history of Yukon time and found the following
1990# regulations, giving the reference title and URL if found, regulation name,
1991# and relevant quote if available.  Each regulation specifically revokes its
1992# predecessor.  The final reference is to the current Interpretation Act
1993# authorizing and resulting from these regulatory changes.
1994#
1995# Only recent regulations were retrievable via Yukon government site search or
1996# index, and only some via Canadian legal sources.  Other sources used include
1997# articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS
1998# Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and
1999# 1970 quoted below; each article includes current extracts from provincial
2000# and territorial ST and DST regulations at the end, summaries and details of
2001# standard times and daylight saving time at many locations across Canada,
2002# with time zone maps, tables and calculations for Canadian Sunrise, Sunset,
2003# and LMST; they also cover many countries and global locations, with a chart
2004# and table showing current Universal Time offsets, and may be useful as
2005# another source of information for 1970 and earlier.
2006#
2007# * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26,
2008#   pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS)
2009#   http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75:
2010#   Yukon Interpretation Ordinance
2011#   Yukon standard time is the local mean time at the one hundred and
2012#   thirty-fifth meridian.
2013#
2014# * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.;
2015#   JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System
2016#   (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1:
2017#   Yukon Interpretation Ordinance, 1955, Chap. 16.
2018#
2019#     (1) Subject to this section, standard time shall be reckoned as nine
2020#     hours behind Greenwich Time and called Yukon Standard Time.
2021#
2022#     (2) Notwithstanding subsection (1), the Commissioner may make regulations
2023#     varying the manner of reckoning standard time.
2024#
2025# * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance
2026#   http://? - no online source found
2027#
2028# * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC,
2029#   Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS)
2030#   http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon
2031#   Territory Commissioner's Order 1967-59 Interpretation Ordinance ...
2032#
2033#     1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon
2034#     Territory on 27th January, 1966, is hereby revoked.
2035#
2036#     2. Yukon (East) Standard Time as defined by section 36 of the
2037#     Interpretation Ordinance from and after mid-night on the 28th day of May,
2038#     1967 shall be reckoned in the same manner as Pacific Standard Time, that
2039#     is to say, eight hours behind Greenwich Time in the area of the Yukon
2040#     Territory lying east of the 138th degree longitude west.
2041#
2042#     3. In the remainder of the Territory, lying west of the 138th degree
2043#     longitude west, Yukon (West) Standard Time shall be reckoned as nine
2044#     hours behind Greenwich Time.
2045#
2046# * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214
2047#   http://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html
2048#   C.O. 1973/214 INTERPRETATION ACT ...
2049#
2050#     1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby
2051#     revoked.
2052#
2053#     2. Yukon Standard Time as defined by section 36 of the Interpretation
2054#     Act from and after midnight on the twenty-eighth day of October, 1973
2055#     shall be reckoned in the same manner as Pacific Standard Time, that is
2056#     to say eight hours behind Greenwich Time.
2057#
2058# * O.I.C. 1980/02 INTERPRETATION ACT
2059#   http://? - no online source found
2060#
2061# * Yukon Daylight Saving Time, YOIC 1987/56
2062#   http://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html
2063#   O.I.C. 1987/056 INTERPRETATION ACT ...
2064#
2065#   In every year between
2066#     (a) two o'clock in the morning in the first Sunday in April, and
2067#     (b) two o'clock in the morning in the last Sunday in October,
2068#   Standard Time shall be reckoned as seven hours behind Greenwich Time and
2069#   called Yukon Daylight Saving Time.
2070#   ...
2071#   Dated ... 9th day of March, A.D., 1987.
2072#
2073# * Yukon Daylight Saving Time 2006, YOIC 2006/127
2074#   http://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html
2075#   O.I.C. 2006/127 INTERPRETATION ACT ...
2076#
2077#     1. In Yukon each year the time for general purposes shall be 7 hours
2078#     behind Greenwich mean time during the period commencing at two o'clock
2079#     in the forenoon on the second Sunday of March and ending at two o'clock
2080#     in the forenoon on the first Sunday of November and shall be called
2081#     Yukon Daylight Saving Time.
2082#
2083#     2. Order-in-Council 1987/56 is revoked.
2084#
2085#     3. This order comes into force January 1, 2007.
2086#
2087# * Interpretation Act, RSY 2002, c 125
2088# http://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html
2089
2090# From Rives McDow (1999-09-04):
2091# Nunavut ... moved ... to incorporate the whole territory into one time zone.
2092# Nunavut moves to single time zone Oct. 31
2093# http://www.nunatsiaq.com/nunavut/nvt90903_13.html
2094#
2095# From Antoine Leca (1999-09-06):
2096# We then need to create a new timezone for the Kitikmeot region of Nunavut
2097# to differentiate it from the Yellowknife region.
2098
2099# From Paul Eggert (1999-09-20):
2100# Basic Facts: The New Territory
2101# http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html
2102# (1999) reports that Pangnirtung operates on eastern time,
2103# and that Coral Harbour does not observe DST.  We don't know when
2104# Pangnirtung switched to eastern time; we'll guess 1995.
2105
2106# From Rives McDow (1999-11-08):
2107# On October 31, when the rest of Nunavut went to Central time,
2108# Pangnirtung wobbled.  Here is the result of their wobble:
2109#
2110# The following businesses and organizations in Pangnirtung use Central Time:
2111#
2112#	First Air, Power Corp, Nunavut Construction, Health Center, RCMP,
2113#	Eastern Arctic National Parks, A & D Specialist
2114#
2115# The following businesses and organizations in Pangnirtung use Eastern Time:
2116#
2117#	Hamlet office, All other businesses, Both schools, Airport operator
2118#
2119# This has made for an interesting situation there, which warranted the news.
2120# No one there that I spoke with seems concerned, or has plans to
2121# change the local methods of keeping time, as it evidently does not
2122# really interfere with any activities or make things difficult locally.
2123# They plan to celebrate New Year's turn-over twice, one hour apart,
2124# so it appears that the situation will last at least that long.
2125# The Nunavut Intergovernmental Affairs hopes that they will "come to
2126# their senses", but the locals evidently don't see any problem with
2127# the current state of affairs.
2128
2129# From Michaela Rodrigue, writing in the
2130# Nunatsiaq News (1999-11-19):
2131# http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html
2132# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones,
2133# central - or Nunavut time - for government offices, and eastern time
2134# for municipal offices and schools....  Igloolik [was similar but then]
2135# made the switch to central time on Saturday, Nov. 6.
2136
2137# From Paul Eggert (2000-10-02):
2138# Matthews and Vincent (1998) say the following, but we lack histories
2139# for these potential new Zones.
2140#
2141# The Canadian Forces station at Alert uses Eastern Time while the
2142# handful of residents at the Eureka weather station [in the Central
2143# zone] skip daylight savings.  Baffin Island, which is crossed by the
2144# Central, Eastern and Atlantic Time zones only uses Eastern Time.
2145# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of
2146# Central Time and Southampton Island [in the Central zone] is not
2147# required to use daylight savings.
2148
2149# From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html>
2150# Nunavut now has two time zones (2000-11-10):
2151# The Nunavut government would allow its employees in Kugluktuk and
2152# Cambridge Bay to operate on central time year-round, putting them
2153# one hour behind the rest of Nunavut for six months during the winter.
2154# At the end of October the two communities had rebelled against
2155# Nunavut's unified time zone, refusing to shift to eastern time with
2156# the rest of the territory for the winter.  Cambridge Bay remained on
2157# central time, while Kugluktuk, even farther west, reverted to
2158# mountain time, which they had used before the advent of Nunavut's
2159# unified time zone in 1999.
2160#
2161# From Rives McDow (2001-01-20), quoting the Nunavut government:
2162# The preceding decision came into effect at midnight, Saturday Nov 4, 2000.
2163
2164# From Paul Eggert (2000-12-04):
2165# Let's just keep track of the official times for now.
2166
2167# From Rives McDow (2001-03-07):
2168# The premier of Nunavut has issued a ministerial statement advising
2169# that effective 2001-04-01, the territory of Nunavut will revert
2170# back to three time zones (mountain, central, and eastern).  Of the
2171# cities in Nunavut, Coral Harbor is the only one that I know of that
2172# has said it will not observe dst, staying on EST year round.  I'm
2173# checking for more info, and will get back to you if I come up with
2174# more.
2175# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]
2176
2177# From Gwillim Law (2005-05-21):
2178# According to ...
2179# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp
2180# (from a 1998 Canadian Geographic article), the de facto and de jure time
2181# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year
2182# round.  Using Google, it's easy to find other websites that confirm this.
2183# I wasn't able to find how far back this time regimen goes, but since it
2184# predates the creation of Nunavut, it probably goes back many years....
2185# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used.
2186#
2187# From Paul Eggert (2014-10-17):
2188# For lack of better information, assume that Southampton Island observed
2189# daylight saving only during wartime.  Gwillim Law's email also
2190# mentioned maps now maintained by National Research Council Canada;
2191# see above for an up-to-date link.
2192
2193# From Chris Walton (2007-03-01):
2194# ... the community of Resolute (located on Cornwallis Island in
2195# Nunavut) moved from Central Time to Eastern Time last November.
2196# Basically the community did not change its clocks at the end of
2197# daylight saving....
2198# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html
2199
2200# From Chris Walton (2011-03-21):
2201# Back in 2007 I initiated the creation of a new "zone file" for Resolute
2202# Bay. Resolute Bay is a small community located about 900km north of
2203# the Arctic Circle. The zone file was required because Resolute Bay had
2204# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007.
2205#
2206# According to new information which I received last week, Resolute Bay
2207# went back to using UTC-6 in the winter of 2007-2008...
2208#
2209# On March 11/2007 most of Canada went onto daylight saving. On March
2210# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I
2211# talked to somebody that was both knowledgeable and helpful. I was able
2212# to confirm that Resolute Bay was still operating on UTC-5. It was
2213# explained to me that Resolute Bay had been on the Eastern Time zone
2214# (EST) in the winter, and was now back on the Central Time zone (CDT).
2215# i.e. the time zone had changed twice in the last year but the clocks
2216# had not moved. The residents had to know which time zone they were in
2217# so they could follow the correct TV schedule...
2218#
2219# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I
2220# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature
2221# of the phone call, I decided to seek out an alternate source of
2222# information. I found an e-mail address for somebody by the name of
2223# Stephanie Adams whose job was listed as "Inns North Support Officer for
2224# Arctic Co-operatives." I was under the impression that Stephanie lived
2225# and worked in Resolute Bay...
2226#
2227# On March 14/2011 I phoned the hamlet office again. I was told that
2228# Resolute Bay had been using Central Standard Time over the winter of
2229# 2010-2011 and that the clocks had therefore been moved one hour ahead
2230# on March 13/2011. The person I talked to was aware that Resolute Bay
2231# had previously experimented with Eastern Standard Time but he could not
2232# tell me when the practice had stopped.
2233#
2234# On March 17/2011 I searched the Web to find an e-mail address of
2235# somebody that might be able to tell me exactly when Resolute Bay went
2236# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz
2237# used to be the mayor of Resolute Bay and he apparently owns half the
2238# businesses including "South Camp Inn." This website has some info on
2239# Aziz:
2240# http://www.uphere.ca/node/493
2241#
2242# I sent Aziz an e-mail asking when Resolute Bay had stopped using
2243# Eastern Standard Time.
2244#
2245# Aziz responded quickly with this: "hi, The time was not changed for the
2246# 1 year only, the following year, the community went back to the old way
2247# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in
2248# the winter Zulu plus 6 hrs"
2249#
2250# This of course conflicted with everything I had ascertained in November 2008.
2251#
2252# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz
2253# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You
2254# may want to check with the weather office in Resolute Bay or do a
2255# search on the weather through Env. Canada. web site"
2256#
2257# If I had realized the Stephanie did not live in Resolute Bay I would
2258# never have contacted her.  I now believe that all the information I
2259# obtained in November 2008 should be ignored...
2260# I apologize for reporting incorrect information in 2008.
2261
2262# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2263Rule	NT_YK	1918	only	-	Apr	14	2:00	1:00	D
2264Rule	NT_YK	1918	only	-	Oct	27	2:00	0	S
2265Rule	NT_YK	1919	only	-	May	25	2:00	1:00	D
2266Rule	NT_YK	1919	only	-	Nov	 1	0:00	0	S
2267Rule	NT_YK	1942	only	-	Feb	 9	2:00	1:00	W # War
2268Rule	NT_YK	1945	only	-	Aug	14	23:00u	1:00	P # Peace
2269Rule	NT_YK	1945	only	-	Sep	30	2:00	0	S
2270Rule	NT_YK	1965	only	-	Apr	lastSun	0:00	2:00	DD
2271Rule	NT_YK	1965	only	-	Oct	lastSun	2:00	0	S
2272Rule	NT_YK	1980	1986	-	Apr	lastSun	2:00	1:00	D
2273Rule	NT_YK	1980	2006	-	Oct	lastSun	2:00	0	S
2274Rule	NT_YK	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
2275# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2276# aka Panniqtuuq
2277Zone America/Pangnirtung 0	-	-00	1921 # trading post est.
2278			-4:00	NT_YK	A%sT	1995 Apr Sun>=1  2:00
2279			-5:00	Canada	E%sT	1999 Oct 31  2:00
2280			-6:00	Canada	C%sT	2000 Oct 29  2:00
2281			-5:00	Canada	E%sT
2282# formerly Frobisher Bay
2283Zone America/Iqaluit	0	-	-00	1942 Aug # Frobisher Bay est.
2284			-5:00	NT_YK	E%sT	1999 Oct 31  2:00
2285			-6:00	Canada	C%sT	2000 Oct 29  2:00
2286			-5:00	Canada	E%sT
2287# aka Qausuittuq
2288Zone America/Resolute	0	-	-00	1947 Aug 31 # Resolute founded
2289			-6:00	NT_YK	C%sT	2000 Oct 29  2:00
2290			-5:00	-	EST	2001 Apr  1  3:00
2291			-6:00	Canada	C%sT	2006 Oct 29  2:00
2292			-5:00	-	EST	2007 Mar 11  3:00
2293			-6:00	Canada	C%sT
2294# aka Kangiqiniq
2295Zone America/Rankin_Inlet 0	-	-00	1957 # Rankin Inlet founded
2296			-6:00	NT_YK	C%sT	2000 Oct 29  2:00
2297			-5:00	-	EST	2001 Apr  1  3:00
2298			-6:00	Canada	C%sT
2299# aka Iqaluktuuttiaq
2300Zone America/Cambridge_Bay 0	-	-00	1920 # trading post est.?
2301			-7:00	NT_YK	M%sT	1999 Oct 31  2:00
2302			-6:00	Canada	C%sT	2000 Oct 29  2:00
2303			-5:00	-	EST	2000 Nov  5  0:00
2304			-6:00	-	CST	2001 Apr  1  3:00
2305			-7:00	Canada	M%sT
2306Zone America/Yellowknife 0	-	-00	1935 # Yellowknife founded?
2307			-7:00	NT_YK	M%sT	1980
2308			-7:00	Canada	M%sT
2309Zone America/Inuvik	0	-	-00	1953 # Inuvik founded
2310			-8:00	NT_YK	P%sT	1979 Apr lastSun  2:00
2311			-7:00	NT_YK	M%sT	1980
2312			-7:00	Canada	M%sT
2313Zone America/Whitehorse	-9:00:12 -	LMT	1900 Aug 20
2314			-9:00	NT_YK	Y%sT	1967 May 28  0:00
2315			-8:00	NT_YK	P%sT	1980
2316			-8:00	Canada	P%sT
2317Zone America/Dawson	-9:17:40 -	LMT	1900 Aug 20
2318			-9:00	NT_YK	Y%sT	1973 Oct 28  0:00
2319			-8:00	NT_YK	P%sT	1980
2320			-8:00	Canada	P%sT
2321
2322
2323###############################################################################
2324
2325# Mexico
2326
2327# From Paul Eggert (2014-12-07):
2328# The Investigation and Analysis Service of the
2329# Mexican Library of Congress (MLoC) has published a
2330# history of Mexican local time (in Spanish)
2331# http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm
2332#
2333# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC.
2334# (In all cases we go with the MLoC.)
2335# S&P report that Baja was at -8:00 in 1922/1923.
2336# S&P say the 1930 transition in Baja was 1930-11-16.
2337# S&P report no DST during summer 1931.
2338# S&P report a transition at 1932-03-30 23:00, not 1932-04-01.
2339
2340# From Gwillim Law (2001-02-20):
2341# There are some other discrepancies between the Decrees page and the
2342# tz database.  I think they can best be explained by supposing that
2343# the researchers who prepared the Decrees page failed to find some of
2344# the relevant documents.
2345
2346# From Alan Perry (1996-02-15):
2347# A guy from our Mexico subsidiary finally found the Presidential Decree
2348# outlining the timezone changes in Mexico.
2349#
2350# ------------- Begin Forwarded Message -------------
2351#
2352# I finally got my hands on the Official Presidential Decree that sets up the
2353# rules for the DST changes. The rules are:
2354#
2355# 1. The country is divided in 3 timezones:
2356#    - Baja California Norte (the Mexico/BajaNorte TZ)
2357#    - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)
2358#    - The rest of the country (the Mexico/General TZ)
2359#
2360# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October
2361#    at 2:00 AM, the times in each zone are as follows:
2362#    BajaNorte: GMT+7
2363#    BajaSur:   GMT+6
2364#    General:   GMT+5
2365#
2366# 3. The rest of the year, the times are as follows:
2367#    BajaNorte: GMT+8
2368#    BajaSur:   GMT+7
2369#    General:   GMT+6
2370#
2371# The Decree was published in Mexico's Official Newspaper on January 4th.
2372#
2373# -------------- End Forwarded Message --------------
2374# From Paul Eggert (1996-06-12):
2375# For an English translation of the decree, see
2376# "Diario Oficial: Time Zone Changeover" (1996-01-04).
2377# http://mexico-travel.com/extra/timezone_eng.html
2378
2379# From Rives McDow (1998-10-08):
2380# The State of Quintana Roo has reverted back to central STD and DST times
2381# (i.e. UTC -0600 and -0500 as of 1998-08-02).
2382
2383# From Rives McDow (2000-01-10):
2384# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time
2385# zone 5 hours from the International Date Line, and will not observe daylight
2386# savings time so as to stay on the same time zone as the southern part of
2387# Arizona year round.
2388
2389# From Jesper N��rgaard, translating
2390# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):
2391# In Oaxaca, the 55.000 teachers from the Section 22 of the National
2392# Syndicate of Education Workers, refuse to apply daylight saving each
2393# year, so that the more than 10,000 schools work at normal hour the
2394# whole year.
2395
2396# From Gwillim Law (2001-01-19):
2397# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says
2398# (translated):...
2399# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced
2400# that Summer Time will be reduced from seven to five months, starting
2401# this year....
2402# http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001
2403# [translated], says "summer time will ... take effect on the first Sunday
2404# in May, and end on the last Sunday of September.
2405
2406# From Arthur David Olson (2001-01-25):
2407# The 2001-01-24 traditional Washington Post contained the page one
2408# story "Timely Issue Divides Mexicans."...
2409# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
2410# ... Mexico City Mayor L��pez Obrador "...is threatening to keep
2411# Mexico City and its 20 million residents on a different time than
2412# the rest of the country..." In particular, L��pez Obrador would abolish
2413# observation of Daylight Saving Time.
2414
2415# Official statute published by the Energy Department
2416# http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre
2417# (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
2418# and Sonora with no DST.  This was reported by Jesper N��rgaard (2001-02-03).
2419
2420# From Paul Eggert (2001-03-03):
2421#
2422# http://www.latimes.com/news/nation/20010303/t000018766.html
2423# James F. Smith writes in today's LA Times
2424# * Sonora will continue to observe standard time.
2425# * Last week Mexico City's mayor Andr��s Manuel L��pez Obrador decreed that
2426#   the Federal District will not adopt DST.
2427# * 4 of 16 district leaders announced they'll ignore the decree.
2428# * The decree does not affect federal-controlled facilities including
2429#   the airport, banks, hospitals, and schools.
2430#
2431# For now we'll assume that the Federal District will bow to federal rules.
2432
2433# From Jesper N��rgaard (2001-04-01):
2434# I found some references to the Mexican application of daylight
2435# saving, which modifies what I had already sent you, stating earlier
2436# that a number of northern Mexican states would go on daylight
2437# saving. The modification reverts this to only cover Baja California
2438# (Norte), while all other states (except Sonora, who has no daylight
2439# saving all year) will follow the original decree of president
2440# Vicente Fox, starting daylight saving May 6, 2001 and ending
2441# September 30, 2001.
2442# References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp>
2443# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)
2444
2445# From Reuters (2001-09-04):
2446# Mexico's Supreme Court on Tuesday declared that daylight savings was
2447# unconstitutional in Mexico City, creating the possibility the
2448# capital will be in a different time zone from the rest of the nation
2449# next year....  The Supreme Court's ruling takes effect at 2:00
2450# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to
2451# standard time. "This is so residents of the Federal District are not
2452# subject to unexpected time changes," a statement from the court said.
2453
2454# From Jesper N��rgaard Welen (2002-03-12):
2455# ... consulting my local grocery store(!) and my coworkers, they all insisted
2456# that a new decision had been made to reinstate US style DST in Mexico....
2457# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20)
2458# confirms this.  Sonora as usual is the only state where DST is not applied.
2459
2460# From Steffen Thorsen (2009-12-28):
2461#
2462# Steffen Thorsen wrote:
2463# > Mexico's House of Representatives has approved a proposal for northern
2464# > Mexico's border cities to share the same daylight saving schedule as
2465# > the United States.
2466# Now this has passed both the Congress and the Senate, so starting from
2467# 2010, some border regions will be the same:
2468# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/
2469# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939
2470# (Spanish)
2471#
2472# Could not find the new law text, but the proposed law text changes are here:
2473# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf
2474# (Gaceta Parlamentaria)
2475#
2476# There is also a list of the votes here:
2477# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html
2478#
2479# Our page:
2480# http://www.timeanddate.com/news/time/north-mexico-dst-change.html
2481
2482# From Arthur David Olson (2010-01-20):
2483# The page
2484# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
2485# includes this text:
2486# En los municipios fronterizos de Tijuana y Mexicali en Baja California;
2487# Ju��rez y Ojinaga en Chihuahua; Acu��a y Piedras Negras en Coahuila;
2488# An��huac en Nuevo Le��n; y Nuevo Laredo, Reynosa y Matamoros en
2489# Tamaulipas, la aplicaci��n de este horario estacional surtir�� efecto
2490# desde las dos horas del segundo domingo de marzo y concluir�� a las dos
2491# horas del primer domingo de noviembre.
2492# En los municipios fronterizos que se encuentren ubicados en la franja
2493# fronteriza norte en el territorio comprendido entre la l��nea
2494# internacional y la l��nea paralela ubicada a una distancia de veinte
2495# kil��metros, as�� como la Ciudad de Ensenada, Baja California, hacia el
2496# interior del pa��s, la aplicaci��n de este horario estacional surtir��
2497# efecto desde las dos horas del segundo domingo de marzo y concluir�� a
2498# las dos horas del primer domingo de noviembre.
2499
2500# From Steffen Thorsen (2014-12-08), translated by Gwillim Law:
2501# The Mexican state of Quintana Roo will likely change to EST in 2015.
2502#
2503# http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo
2504# "With this change, the time conflict that has existed between the municipios
2505# of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an
2506# end. The latter declared itself in rebellion 15 years ago when a time change
2507# was initiated in Mexico, and since then it has refused to change its time
2508# zone along with the rest of the country."
2509#
2510# From Steffen Thorsen (2015-01-14), translated by Gwillim Law:
2511# http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html
2512# "...the new time zone will come into effect at two o'clock on the first Sunday
2513# of February, when we will have to advance the clock one hour from its current
2514# time..."
2515# Also, the new zone will not use DST.
2516#
2517# From Carlos Ra��l Perasso (2015-02-02):
2518# The decree that modifies the Mexican Hour System Law has finally
2519# been published at the Diario Oficial de la Federaci��n
2520# http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015
2521# It establishes 5 zones for Mexico:
2522# 1- Zona Centro (Central Zone): Corresponds to longitude 90 W,
2523#    includes most of Mexico, excluding what's mentioned below.
2524# 2- Zona Pac��fico (Pacific Zone): Longitude 105 W, includes the
2525#    states of Baja California Sur; Chihuahua; Nayarit (excluding Bah��a
2526#    de Banderas which lies in Central Zone); Sinaloa and Sonora.
2527# 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the
2528#    state of Baja California.
2529# 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state
2530#    of Quintana Roo.
2531# 5- The islands, reefs and keys shall take their timezone from the
2532#    longitude they are located at.
2533
2534# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2535Rule	Mexico	1939	only	-	Feb	5	0:00	1:00	D
2536Rule	Mexico	1939	only	-	Jun	25	0:00	0	S
2537Rule	Mexico	1940	only	-	Dec	9	0:00	1:00	D
2538Rule	Mexico	1941	only	-	Apr	1	0:00	0	S
2539Rule	Mexico	1943	only	-	Dec	16	0:00	1:00	W # War
2540Rule	Mexico	1944	only	-	May	1	0:00	0	S
2541Rule	Mexico	1950	only	-	Feb	12	0:00	1:00	D
2542Rule	Mexico	1950	only	-	Jul	30	0:00	0	S
2543Rule	Mexico	1996	2000	-	Apr	Sun>=1	2:00	1:00	D
2544Rule	Mexico	1996	2000	-	Oct	lastSun	2:00	0	S
2545Rule	Mexico	2001	only	-	May	Sun>=1	2:00	1:00	D
2546Rule	Mexico	2001	only	-	Sep	lastSun	2:00	0	S
2547Rule	Mexico	2002	max	-	Apr	Sun>=1	2:00	1:00	D
2548Rule	Mexico	2002	max	-	Oct	lastSun	2:00	0	S
2549# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2550# Quintana Roo; represented by Canc��n
2551Zone America/Cancun	-5:47:04 -	LMT	1922 Jan  1  0:12:56
2552			-6:00	-	CST	1981 Dec 23
2553			-5:00	Mexico	E%sT	1998 Aug  2  2:00
2554			-6:00	Mexico	C%sT	2015 Feb  1  2:00
2555			-5:00	-	EST
2556# Campeche, Yucat��n; represented by M��rida
2557Zone America/Merida	-5:58:28 -	LMT	1922 Jan  1  0:01:32
2558			-6:00	-	CST	1981 Dec 23
2559			-5:00	-	EST	1982 Dec  2
2560			-6:00	Mexico	C%sT
2561# Coahuila, Nuevo Le��n, Tamaulipas (near US border)
2562# This includes the following municipalities:
2563#   in Coahuila: Ocampo, Acu��a, Zaragoza, Jim��nez, Piedras Negras, Nava,
2564#     Guerrero, Hidalgo.
2565#   in Nuevo Le��n: An��huac, Los Aldama.
2566#   in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alem��n, Camargo,
2567#     Gustavo D��az Ordaz, Reynosa, R��o Bravo, Valle Hermoso, Matamoros.
2568# See: Inicia ma��ana Horario de Verano en zona fronteriza, El Universal,
2569# 2016-03-12
2570# http://www.eluniversal.com.mx/articulo/estados/2016/03/12/inicia-manana-horario-de-verano-en-zona-fronteriza
2571Zone America/Matamoros	-6:40:00 -	LMT	1921 Dec 31 23:20:00
2572			-6:00	-	CST	1988
2573			-6:00	US	C%sT	1989
2574			-6:00	Mexico	C%sT	2010
2575			-6:00	US	C%sT
2576# Durango; Coahuila, Nuevo Le��n, Tamaulipas (away from US border)
2577Zone America/Monterrey	-6:41:16 -	LMT	1921 Dec 31 23:18:44
2578			-6:00	-	CST	1988
2579			-6:00	US	C%sT	1989
2580			-6:00	Mexico	C%sT
2581# Central Mexico
2582Zone America/Mexico_City -6:36:36 -	LMT	1922 Jan  1  0:23:24
2583			-7:00	-	MST	1927 Jun 10 23:00
2584			-6:00	-	CST	1930 Nov 15
2585			-7:00	-	MST	1931 May  1 23:00
2586			-6:00	-	CST	1931 Oct
2587			-7:00	-	MST	1932 Apr  1
2588			-6:00	Mexico	C%sT	2001 Sep 30  2:00
2589			-6:00	-	CST	2002 Feb 20
2590			-6:00	Mexico	C%sT
2591# Chihuahua (near US border)
2592# This includes the municipalities of Janos, Ascensi��n, Ju��rez, Guadalupe,
2593# Pr��xedis G Guerrero, Coyame del Sotol, Ojinaga, and Manuel Benavides.
2594# (See the 2016-03-12 El Universal source mentioned above.)
2595Zone America/Ojinaga	-6:57:40 -	LMT	1922 Jan  1  0:02:20
2596			-7:00	-	MST	1927 Jun 10 23:00
2597			-6:00	-	CST	1930 Nov 15
2598			-7:00	-	MST	1931 May  1 23:00
2599			-6:00	-	CST	1931 Oct
2600			-7:00	-	MST	1932 Apr  1
2601			-6:00	-	CST	1996
2602			-6:00	Mexico	C%sT	1998
2603			-6:00	-	CST	1998 Apr Sun>=1  3:00
2604			-7:00	Mexico	M%sT	2010
2605			-7:00	US	M%sT
2606# Chihuahua (away from US border)
2607Zone America/Chihuahua	-7:04:20 -	LMT	1921 Dec 31 23:55:40
2608			-7:00	-	MST	1927 Jun 10 23:00
2609			-6:00	-	CST	1930 Nov 15
2610			-7:00	-	MST	1931 May  1 23:00
2611			-6:00	-	CST	1931 Oct
2612			-7:00	-	MST	1932 Apr  1
2613			-6:00	-	CST	1996
2614			-6:00	Mexico	C%sT	1998
2615			-6:00	-	CST	1998 Apr Sun>=1  3:00
2616			-7:00	Mexico	M%sT
2617# Sonora
2618Zone America/Hermosillo	-7:23:52 -	LMT	1921 Dec 31 23:36:08
2619			-7:00	-	MST	1927 Jun 10 23:00
2620			-6:00	-	CST	1930 Nov 15
2621			-7:00	-	MST	1931 May  1 23:00
2622			-6:00	-	CST	1931 Oct
2623			-7:00	-	MST	1932 Apr  1
2624			-6:00	-	CST	1942 Apr 24
2625			-7:00	-	MST	1949 Jan 14
2626			-8:00	-	PST	1970
2627			-7:00	Mexico	M%sT	1999
2628			-7:00	-	MST
2629
2630# From Alexander Krivenyshev (2010-04-21):
2631# According to news, Bah��a de Banderas (Mexican state of Nayarit)
2632# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to
2633# share the same time zone as nearby city Puerto Vallarta, Jalisco).
2634#
2635# (Spanish)
2636# Bah��a de Banderas homologa su horario al del centro del
2637# pa��s, a partir de este domingo
2638# http://www.nayarit.gob.mx/notes.asp?id=20748
2639#
2640# Bah��a de Banderas homologa su horario con el del Centro del
2641# Pa��s
2642# 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
2643#
2644# (English)
2645# Puerto Vallarta and Bah��a de Banderas: One Time Zone
2646# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml
2647# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html
2648#
2649# "Mexico's Senate approved the amendments to the Mexican Schedule System that
2650# will allow Bah��a de Banderas and Puerto Vallarta to share the same time
2651# zone ..."
2652# Baja California Sur, Nayarit, Sinaloa
2653
2654# From Arthur David Olson (2010-05-01):
2655# Use "Bahia_Banderas" to keep the name to fourteen characters.
2656
2657# Mazatl��n
2658Zone America/Mazatlan	-7:05:40 -	LMT	1921 Dec 31 23:54:20
2659			-7:00	-	MST	1927 Jun 10 23:00
2660			-6:00	-	CST	1930 Nov 15
2661			-7:00	-	MST	1931 May  1 23:00
2662			-6:00	-	CST	1931 Oct
2663			-7:00	-	MST	1932 Apr  1
2664			-6:00	-	CST	1942 Apr 24
2665			-7:00	-	MST	1949 Jan 14
2666			-8:00	-	PST	1970
2667			-7:00	Mexico	M%sT
2668
2669# Bah��a de Banderas
2670Zone America/Bahia_Banderas	-7:01:00 -	LMT	1921 Dec 31 23:59:00
2671			-7:00	-	MST	1927 Jun 10 23:00
2672			-6:00	-	CST	1930 Nov 15
2673			-7:00	-	MST	1931 May  1 23:00
2674			-6:00	-	CST	1931 Oct
2675			-7:00	-	MST	1932 Apr  1
2676			-6:00	-	CST	1942 Apr 24
2677			-7:00	-	MST	1949 Jan 14
2678			-8:00	-	PST	1970
2679			-7:00	Mexico	M%sT	2010 Apr  4  2:00
2680			-6:00	Mexico	C%sT
2681
2682# Baja California
2683Zone America/Tijuana	-7:48:04 -	LMT	1922 Jan  1  0:11:56
2684			-7:00	-	MST	1924
2685			-8:00	-	PST	1927 Jun 10 23:00
2686			-7:00	-	MST	1930 Nov 15
2687			-8:00	-	PST	1931 Apr  1
2688			-8:00	1:00	PDT	1931 Sep 30
2689			-8:00	-	PST	1942 Apr 24
2690			-8:00	1:00	PWT	1945 Aug 14 23:00u
2691			-8:00	1:00	PPT	1945 Nov 12 # Peace
2692			-8:00	-	PST	1948 Apr  5
2693			-8:00	1:00	PDT	1949 Jan 14
2694			-8:00	-	PST	1954
2695			-8:00	CA	P%sT	1961
2696			-8:00	-	PST	1976
2697			-8:00	US	P%sT	1996
2698			-8:00	Mexico	P%sT	2001
2699			-8:00	US	P%sT	2002 Feb 20
2700			-8:00	Mexico	P%sT	2010
2701			-8:00	US	P%sT
2702# From Paul Eggert (2006-03-22):
2703# Formerly there was an America/Ensenada zone, which differed from
2704# America/Tijuana only in that it did not observe DST from 1976
2705# through 1995.  This was as per Shanks (1999).  But Shanks & Pottenger say
2706# Ensenada did not observe DST from 1948 through 1975.  Guy Harris reports
2707# that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and
2708# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that
2709# DST-observance was a town-by-town matter back then.  This concerns
2710# data after 1970 so most likely there should be at least one Zone
2711# other than America/Tijuana for Baja, but it's not clear yet what its
2712# name or contents should be.
2713#
2714# From Paul Eggert (2015-10-08):
2715# Formerly there was an America/Santa_Isabel zone, but this appears to
2716# have come from a misreading of
2717# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
2718# It has been moved to the 'backward' file.
2719#
2720#
2721# Revillagigedo Is
2722# no information
2723
2724###############################################################################
2725
2726# Anguilla
2727# Antigua and Barbuda
2728# See America/Port_of_Spain.
2729
2730# Bahamas
2731#
2732# For 1899 Milne gives -5:09:29.5; round that.
2733#
2734# From Sue Williams (2006-12-07):
2735# The Bahamas announced about a month ago that they plan to change their DST
2736# rules to sync with the U.S. starting in 2007....
2737# http://www.jonesbahamas.com/?c=45&a=10412
2738
2739# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2740Rule	Bahamas	1964	1975	-	Oct	lastSun	2:00	0	S
2741Rule	Bahamas	1964	1975	-	Apr	lastSun	2:00	1:00	D
2742# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2743Zone	America/Nassau	-5:09:30 -	LMT	1912 Mar 2
2744			-5:00	Bahamas	E%sT	1976
2745			-5:00	US	E%sT
2746
2747# Barbados
2748
2749# For 1899 Milne gives -3:58:29.2; round that.
2750
2751# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2752Rule	Barb	1977	only	-	Jun	12	2:00	1:00	D
2753Rule	Barb	1977	1978	-	Oct	Sun>=1	2:00	0	S
2754Rule	Barb	1978	1980	-	Apr	Sun>=15	2:00	1:00	D
2755Rule	Barb	1979	only	-	Sep	30	2:00	0	S
2756Rule	Barb	1980	only	-	Sep	25	2:00	0	S
2757# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2758Zone America/Barbados	-3:58:29 -	LMT	1924 # Bridgetown
2759			-3:58:29 -	BMT	1932 # Bridgetown Mean Time
2760			-4:00	Barb	A%sT
2761
2762# Belize
2763# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.
2764# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2765Rule	Belize	1918	1942	-	Oct	Sun>=2	0:00	0:30	-0530
2766Rule	Belize	1919	1943	-	Feb	Sun>=9	0:00	0	CST
2767Rule	Belize	1973	only	-	Dec	 5	0:00	1:00	CDT
2768Rule	Belize	1974	only	-	Feb	 9	0:00	0	CST
2769Rule	Belize	1982	only	-	Dec	18	0:00	1:00	CDT
2770Rule	Belize	1983	only	-	Feb	12	0:00	0	CST
2771# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2772Zone	America/Belize	-5:52:48 -	LMT	1912 Apr
2773			-6:00	Belize	%s
2774
2775# Bermuda
2776
2777# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower,
2778# Bermuda dockyard, Ireland I; round that.
2779
2780# From Dan Jones, reporting in The Royal Gazette (2006-06-26):
2781
2782# Next year, however, clocks in the US will go forward on the second Sunday
2783# in March, until the first Sunday in November.  And, after the Time Zone
2784# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
2785# Friday, the same thing will happen in Bermuda.
2786# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135
2787
2788# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2789Zone Atlantic/Bermuda	-4:19:18 -	LMT	1930 Jan  1  2:00 # Hamilton
2790			-4:00	-	AST	1974 Apr 28  2:00
2791			-4:00	Canada	A%sT	1976
2792			-4:00	US	A%sT
2793
2794# Cayman Is
2795# See America/Panama.
2796
2797# Costa Rica
2798
2799# Milne gives -5:36:13.3 as San Jos�� mean time; round to nearest.
2800
2801# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2802Rule	CR	1979	1980	-	Feb	lastSun	0:00	1:00	D
2803Rule	CR	1979	1980	-	Jun	Sun>=1	0:00	0	S
2804Rule	CR	1991	1992	-	Jan	Sat>=15	0:00	1:00	D
2805# IATA SSIM (1991-09) says the following was at 1:00;
2806# go with Shanks & Pottenger.
2807Rule	CR	1991	only	-	Jul	 1	0:00	0	S
2808Rule	CR	1992	only	-	Mar	15	0:00	0	S
2809# There are too many San Jos��s elsewhere, so we'll use 'Costa Rica'.
2810# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
2811Zone America/Costa_Rica	-5:36:13 -	LMT	1890        # San Jos��
2812			-5:36:13 -	SJMT	1921 Jan 15 # San Jos�� Mean Time
2813			-6:00	CR	C%sT
2814# Coco
2815# no information; probably like America/Costa_Rica
2816
2817# Cuba
2818
2819# From Paul Eggert (2013-02-21):
2820# Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57
2821# for the port, and -5:30 for meteorological observations.
2822# For now, stick with Shanks & Pottenger.
2823
2824# From Arthur David Olson (1999-03-29):
2825# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
2826# the Cuban National Team and the Baltimore Orioles was carried live on
2827# the Orioles Radio Network, including affiliate WTOP in Washington, DC.
2828# During the game, play-by-play announcer Jim Hunter noted that
2829# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
2830# Time today."  (The "two hour" remark referred to losing one hour of
2831# sleep on 1999-03-28 - when the announcers were in Cuba as it switched
2832# to DST - and one more hour on 1999-04-04 - when the announcers will have
2833# returned to Baltimore, which switches on that date.)
2834
2835# From Steffen Thorsen (2013-11-11):
2836# DST start in Cuba in 2004 ... does not follow the same rules as the
2837# years before.  The correct date should be Sunday 2004-03-28 00:00 ...
2838# https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html
2839
2840# From Evert van der Veer via Steffen Thorsen (2004-10-28):
2841# Cuba is not going back to standard time this year.
2842# From Paul Eggert (2006-03-22):
2843# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html
2844# says that it's due to a problem at the Antonio Guiteras
2845# thermoelectric plant, and says "This October there will be no return
2846# to normal hours (after daylight saving time)".
2847# For now, let's assume that it's a temporary measure.
2848
2849# From Carlos A. Carnero Delgado (2005-11-12):
2850# This year (just like in 2004-2005) there's no change in time zone
2851# adjustment in Cuba.  We will stay in daylight saving time:
2852# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html
2853
2854# From Jesper N��rgaard Welen (2006-10-21):
2855# An article in GRANMA INTERNACIONAL claims that Cuba will end
2856# the 3 years of permanent DST next weekend, see
2857# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html
2858# "On Saturday night, October 28 going into Sunday, October 29, at 01:00,
2859# watches should be set back one hour - going back to 00:00 hours - returning
2860# to the normal schedule....
2861
2862# From Paul Eggert (2007-03-02):
2863# <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday,
2864# says Cuban clocks will advance at midnight on March 10.
2865# For lack of better information, assume Cuba will use US rules,
2866# except that it switches at midnight standard time as usual.
2867#
2868# From Steffen Thorsen (2007-10-25):
2869# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week
2870# earlier - on the last Sunday of October, just like in 2006.
2871#
2872# He supplied these references:
2873#
2874# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES
2875# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm
2876#
2877# From Alex Krivenyshev (2007-10-25):
2878# Here is also article from Granma (Cuba):
2879#
2880# Regir�� el Horario Normal desde el pr��ximo domingo 28 de octubre
2881# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html
2882#
2883# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html
2884
2885# From Arthur David Olson (2008-03-09):
2886# I'm in Maryland which is now observing United States Eastern Daylight
2887# Time. At 9:44 local time I used RealPlayer to listen to
2888# http://media.enet.cu/radioreloj
2889# a Cuban information station, and heard
2890# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"),
2891# indicating that Cuba is still on standard time.
2892
2893# From Steffen Thorsen (2008-03-12):
2894# It seems that Cuba will start DST on Sunday, 2007-03-16...
2895# It was announced yesterday, according to this source (in Spanish):
2896# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm
2897#
2898# Some more background information is posted here:
2899# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html
2900#
2901# The article also says that Cuba has been observing DST since 1963,
2902# while Shanks (and tzdata) has 1965 as the first date (except in the
2903# 1940's). Many other web pages in Cuba also claim that it has been
2904# observed since 1963, but with the exception of 1970 - an exception
2905# which is not present in tzdata/Shanks. So there is a chance we need to
2906# change some historic records as well.
2907#
2908# One example:
2909# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm
2910
2911# From Jesper N��rgaard Welen (2008-03-13):
2912# The Cuban time change has just been confirmed on the most authoritative
2913# web site, the Granma.  Please check out
2914# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html
2915#
2916# Basically as expected after Steffen Thorsen's information, the change
2917# will take place midnight between Saturday and Sunday.
2918
2919# From Arthur David Olson (2008-03-12):
2920# Assume Sun>=15 (third Sunday) going forward.
2921
2922# From Alexander Krivenyshev (2009-03-04)
2923# According to the Radio Reloj - Cuba will start Daylight Saving Time on
2924# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009-
2925# not on midnight March 14 / March 15 as previously thought.
2926#
2927# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html
2928# (in Spanish)
2929
2930# From Arthur David Olson (2009-03-09)
2931# I listened over the Internet to
2932# http://media.enet.cu/readioreloj
2933# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the
2934# the time was announced as "diez cinco" - the same time as here, indicating
2935# that has indeed switched to DST. Assume second Sunday from 2009 forward.
2936
2937# From Steffen Thorsen (2011-03-08):
2938# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00
2939# this year. Nothing about the end date known so far (if that has
2940# changed at all).
2941#
2942# Source:
2943# http://granma.co.cu/2011/03/08/nacional/artic01.html
2944#
2945# Our info:
2946# http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html
2947#
2948# From Steffen Thorsen (2011-10-30)
2949# Cuba will end DST two weeks later this year. Instead of going back
2950# tonight, it has been delayed to 2011-11-13 at 01:00.
2951#
2952# One source (Spanish)
2953# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html
2954#
2955# Our page:
2956# http://www.timeanddate.com/news/time/cuba-time-changes-2011.html
2957#
2958# From Steffen Thorsen (2012-03-01)
2959# According to Radio Reloj, Cuba will start DST on Midnight between March
2960# 31 and April 1.
2961#
2962# Radio Reloj has the following info (Spanish):
2963# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril
2964#
2965# Our info on it:
2966# http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html
2967
2968# From Steffen Thorsen (2012-11-03):
2969# Radio Reloj and many other sources report that Cuba is changing back
2970# to standard time on 2012-11-04:
2971# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre
2972# From Paul Eggert (2012-11-03):
2973# For now, assume the future rule is first Sunday in November.
2974
2975# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
2976Rule	Cuba	1928	only	-	Jun	10	0:00	1:00	D
2977Rule	Cuba	1928	only	-	Oct	10	0:00	0	S
2978Rule	Cuba	1940	1942	-	Jun	Sun>=1	0:00	1:00	D
2979Rule	Cuba	1940	1942	-	Sep	Sun>=1	0:00	0	S
2980Rule	Cuba	1945	1946	-	Jun	Sun>=1	0:00	1:00	D
2981Rule	Cuba	1945	1946	-	Sep	Sun>=1	0:00	0	S
2982Rule	Cuba	1965	only	-	Jun	1	0:00	1:00	D
2983Rule	Cuba	1965	only	-	Sep	30	0:00	0	S
2984Rule	Cuba	1966	only	-	May	29	0:00	1:00	D
2985Rule	Cuba	1966	only	-	Oct	2	0:00	0	S
2986Rule	Cuba	1967	only	-	Apr	8	0:00	1:00	D
2987Rule	Cuba	1967	1968	-	Sep	Sun>=8	0:00	0	S
2988Rule	Cuba	1968	only	-	Apr	14	0:00	1:00	D
2989Rule	Cuba	1969	1977	-	Apr	lastSun	0:00	1:00	D
2990Rule	Cuba	1969	1971	-	Oct	lastSun	0:00	0	S
2991Rule	Cuba	1972	1974	-	Oct	8	0:00	0	S
2992Rule	Cuba	1975	1977	-	Oct	lastSun	0:00	0	S
2993Rule	Cuba	1978	only	-	May	7	0:00	1:00	D
2994Rule	Cuba	1978	1990	-	Oct	Sun>=8	0:00	0	S
2995Rule	Cuba	1979	1980	-	Mar	Sun>=15	0:00	1:00	D
2996Rule	Cuba	1981	1985	-	May	Sun>=5	0:00	1:00	D
2997Rule	Cuba	1986	1989	-	Mar	Sun>=14	0:00	1:00	D
2998Rule	Cuba	1990	1997	-	Apr	Sun>=1	0:00	1:00	D
2999Rule	Cuba	1991	1995	-	Oct	Sun>=8	0:00s	0	S
3000Rule	Cuba	1996	only	-	Oct	 6	0:00s	0	S
3001Rule	Cuba	1997	only	-	Oct	12	0:00s	0	S
3002Rule	Cuba	1998	1999	-	Mar	lastSun	0:00s	1:00	D
3003Rule	Cuba	1998	2003	-	Oct	lastSun	0:00s	0	S
3004Rule	Cuba	2000	2003	-	Apr	Sun>=1	0:00s	1:00	D
3005Rule	Cuba	2004	only	-	Mar	lastSun	0:00s	1:00	D
3006Rule	Cuba	2006	2010	-	Oct	lastSun	0:00s	0	S
3007Rule	Cuba	2007	only	-	Mar	Sun>=8	0:00s	1:00	D
3008Rule	Cuba	2008	only	-	Mar	Sun>=15	0:00s	1:00	D
3009Rule	Cuba	2009	2010	-	Mar	Sun>=8	0:00s	1:00	D
3010Rule	Cuba	2011	only	-	Mar	Sun>=15	0:00s	1:00	D
3011Rule	Cuba	2011	only	-	Nov	13	0:00s	0	S
3012Rule	Cuba	2012	only	-	Apr	1	0:00s	1:00	D
3013Rule	Cuba	2012	max	-	Nov	Sun>=1	0:00s	0	S
3014Rule	Cuba	2013	max	-	Mar	Sun>=8	0:00s	1:00	D
3015
3016# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3017Zone	America/Havana	-5:29:28 -	LMT	1890
3018			-5:29:36 -	HMT	1925 Jul 19 12:00 # Havana MT
3019			-5:00	Cuba	C%sT
3020
3021# Dominica
3022# See America/Port_of_Spain.
3023
3024# Dominican Republic
3025
3026# From Steffen Thorsen (2000-10-30):
3027# Enrique Morales reported to me that the Dominican Republic has changed the
3028# time zone to Eastern Standard Time as of Sunday 29 at 2 am....
3029# http://www.listin.com.do/antes/261000/republica/princi.html
3030
3031# From Paul Eggert (2000-12-04):
3032# That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
3033
3034# From Rives McDow (2000-12-01):
3035# Dominican Republic changed its mind and presidential decree on Tuesday,
3036# November 28, 2000, with a new decree.  On Sunday, December 3 at 1:00 AM the
3037# Dominican Republic will be reverting to 8 hours from the International Date
3038# Line, and will not be using DST in the foreseeable future.  The reason they
3039# decided to use DST was to be in synch with Puerto Rico, who was also going
3040# to implement DST.  When Puerto Rico didn't implement DST, the president
3041# decided to revert.
3042
3043
3044# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
3045Rule	DR	1966	only	-	Oct	30	0:00	1:00	EDT
3046Rule	DR	1967	only	-	Feb	28	0:00	0	EST
3047Rule	DR	1969	1973	-	Oct	lastSun	0:00	0:30	-0430
3048Rule	DR	1970	only	-	Feb	21	0:00	0	EST
3049Rule	DR	1971	only	-	Jan	20	0:00	0	EST
3050Rule	DR	1972	1974	-	Jan	21	0:00	0	EST
3051# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3052Zone America/Santo_Domingo -4:39:36 -	LMT	1890
3053			-4:40	-	SDMT	1933 Apr  1 12:00 # S. Dom. MT
3054			-5:00	DR	%s	1974 Oct 27
3055			-4:00	-	AST	2000 Oct 29  2:00
3056			-5:00	US	E%sT	2000 Dec  3  1:00
3057			-4:00	-	AST
3058
3059# El Salvador
3060
3061# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
3062Rule	Salv	1987	1988	-	May	Sun>=1	0:00	1:00	D
3063Rule	Salv	1987	1988	-	Sep	lastSun	0:00	0	S
3064# There are too many San Salvadors elsewhere, so use America/El_Salvador
3065# instead of America/San_Salvador.
3066# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3067Zone America/El_Salvador -5:56:48 -	LMT	1921 # San Salvador
3068			-6:00	Salv	C%sT
3069
3070# Grenada
3071# Guadeloupe
3072# St Barth��lemy
3073# St Martin (French part)
3074# See America/Port_of_Spain.
3075
3076# Guatemala
3077#
3078# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
3079# Diario Co Latino, at
3080# <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>,
3081# says in an article dated 2006-04-19 that the Guatemalan government had
3082# decided on that date to advance official time by 60 minutes, to lessen the
3083# impact of the elevated cost of oil....  Daylight saving time will last from
3084# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
3085# From Paul Eggert (2006-06-22):
3086# The Ministry of Energy and Mines, press release CP-15/2006
3087# (2006-04-19), says DST ends at 24:00.  See
3088# http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf
3089
3090# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
3091Rule	Guat	1973	only	-	Nov	25	0:00	1:00	D
3092Rule	Guat	1974	only	-	Feb	24	0:00	0	S
3093Rule	Guat	1983	only	-	May	21	0:00	1:00	D
3094Rule	Guat	1983	only	-	Sep	22	0:00	0	S
3095Rule	Guat	1991	only	-	Mar	23	0:00	1:00	D
3096Rule	Guat	1991	only	-	Sep	 7	0:00	0	S
3097Rule	Guat	2006	only	-	Apr	30	0:00	1:00	D
3098Rule	Guat	2006	only	-	Oct	 1	0:00	0	S
3099# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3100Zone America/Guatemala	-6:02:04 -	LMT	1918 Oct 5
3101			-6:00	Guat	C%sT
3102
3103# Haiti
3104# From Gwillim Law (2005-04-15):
3105# Risto O. Nyk��nen wrote me that Haiti is now on DST.
3106# I searched for confirmation, and I found a press release
3107# on the Web page of the Haitian Consulate in Chicago (2005-03-31),
3108# <http://www.haitianconsulate.org/time.doc>.  Translated from French, it says:
3109#
3110#  "The Prime Minister's Communication Office notifies the public in general
3111#   and the press in particular that, following a decision of the Interior
3112#   Ministry and the Territorial Collectivities [I suppose that means the
3113#   provinces], Haiti will move to Eastern Daylight Time in the night from next
3114#   Saturday the 2nd to Sunday the 3rd.
3115#
3116#  "Consequently, the Prime Minister's Communication Office wishes to inform
3117#   the population that the country's clocks will be set forward one hour
3118#   starting at midnight.  This provision will hold until the last Saturday in
3119#   October 2005.
3120#
3121#  "Port-au-Prince, March 31, 2005"
3122#
3123# From Steffen Thorsen (2006-04-04):
3124# I have been informed by users that Haiti observes DST this year like
3125# last year, so the current "only" rule for 2005 might be changed to a
3126# "max" rule or to last until 2006. (Who knows if they will observe DST
3127# next year or if they will extend their DST like US/Canada next year).
3128#
3129# I have found this article about it (in French):
3130# http://www.haitipressnetwork.com/news.cfm?articleID=7612
3131#
3132# The reason seems to be an energy crisis.
3133
3134# From Stephen Colebourne (2007-02-22):
3135# Some IATA info: Haiti won't be having DST in 2007.
3136
3137# From Steffen Thorsen (2012-03-11):
3138# According to several news sources, Haiti will observe DST this year,
3139# apparently using the same start and end date as USA/Canada.
3140# So this means they have already changed their time.
3141#
3142# http://www.alterpresse.org/spip.php?article12510
3143# http://radiovision2000haiti.net/home/?p=13253
3144#
3145# From Arthur David Olson (2012-03-11):
3146# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to
3147# 3:00 a.m. rather than the traditional Haitian jump at midnight.
3148# Assume a US-style fall back as well.
3149
3150# From Steffen Thorsen (2013-03-10):
3151# It appears that Haiti is observing DST this year as well, same rules
3152# as US/Canada.  They did it last year as well, and it looks like they
3153# are going to observe DST every year now...
3154#
3155# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/
3156# http://www.canalplushaiti.net/?p=6714
3157
3158# From Steffen Thorsen (2016-03-12):
3159# Jean Antoine, editor of www.haiti-reference.com informed us that Haiti
3160# are not going on DST this year.  Several other resources confirm this: ...
3161# http://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html
3162# http://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/
3163# http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/
3164
3165# From Steffen Thorsen (2017-03-12):
3166# We have received 4 mails from different people telling that Haiti
3167# has started DST again today, and this source seems to confirm that,
3168# I have not been able to find a more authoritative source:
3169# https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html
3170
3171# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
3172Rule	Haiti	1983	only	-	May	8	0:00	1:00	D
3173Rule	Haiti	1984	1987	-	Apr	lastSun	0:00	1:00	D
3174Rule	Haiti	1983	1987	-	Oct	lastSun	0:00	0	S
3175# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
3176# Go with IATA.
3177Rule	Haiti	1988	1997	-	Apr	Sun>=1	1:00s	1:00	D
3178Rule	Haiti	1988	1997	-	Oct	lastSun	1:00s	0	S
3179Rule	Haiti	2005	2006	-	Apr	Sun>=1	0:00	1:00	D
3180Rule	Haiti	2005	2006	-	Oct	lastSun	0:00	0	S
3181Rule	Haiti	2012	2015	-	Mar	Sun>=8	2:00	1:00	D
3182Rule	Haiti	2012	2015	-	Nov	Sun>=1	2:00	0	S
3183Rule	Haiti	2017	max	-	Mar	Sun>=8	2:00	1:00	D
3184Rule	Haiti	2017	max	-	Nov	Sun>=1	2:00	0	S
3185# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3186Zone America/Port-au-Prince -4:49:20 -	LMT	1890
3187			-4:49	-	PPMT	1917 Jan 24 12:00 # P-a-P MT
3188			-5:00	Haiti	E%sT
3189
3190# Honduras
3191# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.
3192
3193# From Paul Eggert (2006-05-05):
3194# worldtimezone.com reports a 2006-05-02 Spanish-language AP article
3195# saying Honduras will start using DST midnight Saturday, effective 4
3196# months until September.  La Tribuna reported today
3197# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president
3198# of Honduras, refused to back down on this.
3199
3200# From Jesper N��rgaard Welen (2006-08-08):
3201# It seems that Honduras has returned from DST to standard time this Monday at
3202# 00:00 hours (prolonging Sunday to 25 hours duration).
3203# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html
3204
3205# From Paul Eggert (2006-08-08):
3206# Also see Diario El Heraldo, The country returns to standard time (2006-08-08).
3207# http://www.elheraldo.hn/nota.php?nid=54941&sec=12
3208# It mentions executive decree 18-2006.
3209
3210# From Steffen Thorsen (2006-08-17):
3211# Honduras will observe DST from 2007 to 2009, exact dates are not
3212# published, I have located this authoritative source:
3213# http://www.presidencia.gob.hn/noticia.aspx?nId=47
3214
3215# From Steffen Thorsen (2007-03-30):
3216# http://www.laprensahn.com/pais_nota.php?id04962=7386
3217# So it seems that Honduras will not enter DST this year....
3218
3219# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
3220Rule	Hond	1987	1988	-	May	Sun>=1	0:00	1:00	D
3221Rule	Hond	1987	1988	-	Sep	lastSun	0:00	0	S
3222Rule	Hond	2006	only	-	May	Sun>=1	0:00	1:00	D
3223Rule	Hond	2006	only	-	Aug	Mon>=1	0:00	0	S
3224# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3225Zone America/Tegucigalpa -5:48:52 -	LMT	1921 Apr
3226			-6:00	Hond	C%sT
3227#
3228# Great Swan I ceded by US to Honduras in 1972
3229
3230# Jamaica
3231# Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an
3232# unspecified official document, and says "This time is used throughout the
3233# island".  Go with Milne.  Round to the nearest second as required by zic.
3234#
3235# Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but
3236# Lance Neita writes that Prime Minister Michael Manley decreed it January 5.
3237# Assume Neita meant Jan 6 02:00, the same as the US.  Neita also writes that
3238# Manley's supporters associated this act with Manley's nickname "Joshua"
3239# (recall that in the Bible the sun stood still at Joshua's request),
3240# and with the Rod of Correction which Manley said he had received from
3241# Haile Selassie, Emperor of Ethiopia.  See:
3242# Neita L. The politician in all of us. Jamaica Observer 2014-09-20
3243# http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647
3244#
3245# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3246Zone	America/Jamaica	-5:07:11 -	LMT	1890        # Kingston
3247			-5:07:11 -	KMT	1912 Feb    # Kingston Mean Time
3248			-5:00	-	EST	1974
3249			-5:00	US	E%sT	1984
3250			-5:00	-	EST
3251
3252# Martinique
3253# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3254Zone America/Martinique	-4:04:20 -      LMT	1890        # Fort-de-France
3255			-4:04:20 -	FFMT	1911 May    # Fort-de-France MT
3256			-4:00	-	AST	1980 Apr  6
3257			-4:00	1:00	ADT	1980 Sep 28
3258			-4:00	-	AST
3259
3260# Montserrat
3261# See America/Port_of_Spain.
3262
3263# Nicaragua
3264#
3265# This uses Shanks & Pottenger for times before 2005.
3266#
3267# From Steffen Thorsen (2005-04-12):
3268# I've got reports from 8 different people that Nicaragua just started
3269# DST on Sunday 2005-04-10, in order to save energy because of
3270# expensive petroleum.  The exact end date for DST is not yet
3271# announced, only "September" but some sites also say "mid-September".
3272# Some background information is available on the President's official site:
3273# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm
3274# The Decree, no 23-2005 is available here:
3275# 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
3276#
3277# From Paul Eggert (2005-05-01):
3278# The decree doesn't say anything about daylight saving, but for now let's
3279# assume that it is daylight saving....
3280#
3281# From Gwillim Law (2005-04-21):
3282# The Associated Press story on the time change, which can be found at
3283# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html
3284# and elsewhere, says (fifth paragraph, translated from Spanish): "The last
3285# time that a change of clocks was applied to save energy was in the year 2000
3286# during the Arnoldo Alem��n administration."...
3287# The northamerica file says that Nicaragua has been on UTC-6 continuously
3288# since December 1998.  I wasn't able to find any details of Nicaraguan time
3289# changes in 2000.  Perhaps a note could be added to the northamerica file, to
3290# the effect that we have indirect evidence that DST was observed in 2000.
3291#
3292# From Jesper N��rgaard Welen (2005-11-02):
3293# Nicaragua left DST the 2005-10-02 at 00:00 (local time).
3294# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm
3295# (2005-09-26)
3296#
3297# From Jesper N��rgaard Welen (2006-05-05):
3298# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410
3299# (my informal translation)
3300# By order of the president of the republic, Enrique Bola��os, Nicaragua
3301# advanced by sixty minutes their official time, yesterday at 2 in the
3302# morning, and will stay that way until 30th of September.
3303#
3304# From Jesper N��rgaard Welen (2006-09-30):
3305# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf
3306# My informal translation runs:
3307# The natural sun time is restored in all the national territory, in that the
3308# time is returned one hour at 01:00 am of October 1 of 2006.
3309#
3310# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
3311Rule	Nic	1979	1980	-	Mar	Sun>=16	0:00	1:00	D
3312Rule	Nic	1979	1980	-	Jun	Mon>=23	0:00	0	S
3313Rule	Nic	2005	only	-	Apr	10	0:00	1:00	D
3314Rule	Nic	2005	only	-	Oct	Sun>=1	0:00	0	S
3315Rule	Nic	2006	only	-	Apr	30	2:00	1:00	D
3316Rule	Nic	2006	only	-	Oct	Sun>=1	1:00	0	S
3317# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3318Zone	America/Managua	-5:45:08 -	LMT	1890
3319			-5:45:12 -	MMT	1934 Jun 23 # Managua Mean Time?
3320			-6:00	-	CST	1973 May
3321			-5:00	-	EST	1975 Feb 16
3322			-6:00	Nic	C%sT	1992 Jan  1  4:00
3323			-5:00	-	EST	1992 Sep 24
3324			-6:00	-	CST	1993
3325			-5:00	-	EST	1997
3326			-6:00	Nic	C%sT
3327
3328# Panama
3329# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3330Zone	America/Panama	-5:18:08 -	LMT	1890
3331			-5:19:36 -	CMT	1908 Apr 22 # Col��n Mean Time
3332			-5:00	-	EST
3333Link America/Panama America/Cayman
3334
3335# Puerto Rico
3336# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'.
3337# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3338Zone America/Puerto_Rico -4:24:25 -	LMT	1899 Mar 28 12:00 # San Juan
3339			-4:00	-	AST	1942 May  3
3340			-4:00	US	A%sT	1946
3341			-4:00	-	AST
3342
3343# St Kitts-Nevis
3344# St Lucia
3345# See America/Port_of_Spain.
3346
3347# St Pierre and Miquelon
3348# There are too many St Pierres elsewhere, so we'll use 'Miquelon'.
3349# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3350Zone America/Miquelon	-3:44:40 -	LMT	1911 May 15 # St Pierre
3351			-4:00	-	AST	1980 May
3352			-3:00	-	-03	1987
3353			-3:00	Canada	-03/-02
3354
3355# St Vincent and the Grenadines
3356# See America/Port_of_Spain.
3357
3358# Turks and Caicos
3359#
3360# From Chris Dunn in
3361# http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007
3362# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3363# daylight saving dates for time changes have been adjusted to match
3364# the recent U.S. change of dates.
3365#
3366# From Brian Inglis (2007-04-28):
3367# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
3368# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
3369# rows before that there is an out of date entry for Oct:
3370# "Eastern Standard Times Begins 2007
3371# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time"
3372# indicating that the normal ET rules are followed.
3373#
3374# From Paul Eggert (2014-08-19):
3375# The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round.  See:
3376# http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm
3377# Model this as a switch from EST/EDT to AST ...
3378# From Chris Walton (2014-11-04):
3379# ... the TCI government appears to have delayed the switch to
3380# "permanent daylight saving time" by one year....
3381# http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm
3382#
3383# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
3384Zone America/Grand_Turk	-4:44:32 -	LMT	1890
3385			-5:07:11 -	KMT	1912 Feb # Kingston Mean Time
3386			-5:00	-	EST	1979
3387			-5:00	US	E%sT	2015 Nov Sun>=1 2:00
3388			-4:00	-	AST
3389
3390# British Virgin Is
3391# Virgin Is
3392# See America/Port_of_Spain.
3393
3394
3395# Local Variables:
3396# coding: utf-8
3397# End:
3398