# <pre>


# This file is in the public domain, so clarified as of


# 2009-05-17 by Arthur David Olson.





# also includes Central America and the Caribbean





# This data is by no means authoritative; if you think you know better,


# go ahead and edit the file (and please send any changes to


# tz@iana.org for general use in the future).





# From Paul Eggert (1999-03-22):


# A reliable and entertaining source about time zones is


# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).





###############################################################################





# United States





# From Paul Eggert (1999-03-31):


# Howse writes (pp 121-125) that time zones were invented by


# Professor Charles Ferdinand Dowd (1825-1904),


# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).


# His pamphlet ``A System of National Time for Railroads'' (1870)


# was the result of his proposals at the Convention of Railroad Trunk Lines


# in New York City (1869-10).  His 1870 proposal was based on Washington, DC,


# but in 1872-05 he moved the proposed origin to Greenwich.


# His proposal was adopted by the railroads on 1883-11-18 at 12:00,


# and the most of the country soon followed suit.





# From Paul Eggert (2005-04-16):


# That 1883 transition occurred at 12:00 new time, not at 12:00 old time.


# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).





# From Paul Eggert (2006-03-22):


# A good source for time zone historical data in the US is


# Thomas G. Shanks, The American Atlas (5th edition),


# San Diego: ACS Publications, Inc. (1991).


# Make sure you have the errata sheet; the book is somewhat useless without it.


# It is the source for most of the pre-1991 US entries below.





# From Paul Eggert (2001-03-06):


# Daylight Saving Time was first suggested as a joke by Benjamin Franklin


# in his whimsical essay ``An Economical Project for Diminishing the Cost


# of Light'' published in the Journal de Paris (1784-04-26).


# Not everyone is happy with the results:


#


#	I don't really care how time is reckoned so long as there is some


#	agreement about it, but I object to being told that I am saving


#	daylight when my reason tells me that I am doing nothing of the kind.


#	I even object to the implication that I am wasting something


#	valuable if I stay in bed after the sun has risen.  As an admirer


#	of moonlight I resent the bossy insistence of those who want to


#	reduce my time for enjoying it.  At the back of the Daylight Saving


#	scheme I detect the bony, blue-fingered hand of Puritanism, eager


#	to push people into bed earlier, and get them up earlier, to make


#	them healthy, wealthy and wise in spite of themselves.


#


#	-- Robertson Davies, The diary of Samuel Marchbanks,


#	   Clarke, Irwin (1947), XIX, Sunday


#


# For more about the first ten years of DST in the United States, see


# Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html">


# Ten years of daylight saving from the Pittsburgh standpoint


# (Carnegie Library of Pittsburgh, 1927)</a>.


#


# Shanks says that DST was called "War Time" in the US in 1918 and 1919.


# However, DST was imposed by the Standard Time Act of 1918, which


# was the first nationwide legal time standard, and apparently


# time was just called "Standard Time" or "Daylight Saving Time".





# From Arthur David Olson:


# US Daylight Saving Time ended on the last Sunday of *October* in 1974.


# See, for example, the front page of the Saturday, 1974-10-26


# and Sunday, 1974-10-27 editions of the Washington Post.





# From Arthur David Olson:


# Before the Uniform Time Act of 1966 took effect in 1967, observance of


# Daylight Saving Time in the US was by local option, except during wartime.





# From Arthur David Olson (2000-09-25):


# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.


# In the introduction, Oboler spoke of "Eastern Peace Time."


# An AltaVista search turned up


# <a href="http://rowayton.org/rhs/hstaug45.html">:


# "When the time is announced over the radio now, it is 'Eastern Peace


# Time' instead of the old familiar 'Eastern War Time.'  Peace is wonderful."


# </a> (August 1945) by way of confirmation.





# From Joseph Gallant citing


# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):


# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set


# to switch to London for Attlee's address, but the American people


# never got to hear his speech live. According to one press account,


# CBS' Bob Trout was first to announce the word of Japan's surrender,


# but a few seconds later, NBC, ABC and Mutual also flashed the word


# of surrender, all of whom interrupting the bells of Big Ben in


# London which were to precede Mr. Attlee's speech.





# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout.  From


# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times:


#


# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender.


# Any announcement from Asia would reach St. John's New York newsroom on a


# wire service teletype machine, which had prescribed signals for major news.


# Associated Press, for example, would ring five bells before spewing out


# typed copy of an important story, and 10 bells for news "of transcendental


# importance."


#


# On Aug. 14, stalling while talking steadily into the NBC networks' open


# microphone, St. John heard five bells and waited only to hear a sixth bell,


# before announcing confidently: "Ladies and gentlemen, World War II is over.


# The Japanese have agreed to our surrender terms."


#


# He had scored a 20-second scoop on other broadcasters.





# From Arthur David Olson (2005-08-22):


# Paul has been careful to use the "US" rules only in those locations


# that are part of the United States; this reflects the real scope of


# U.S. government action.  So even though the "US" rules have changed


# in the latest release, other countries won't be affected.





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	US	1918	1919	-	Mar	lastSun	2:00	1:00	D


Rule	US	1918	1919	-	Oct	lastSun	2:00	0	S


Rule	US	1942	only	-	Feb	9	2:00	1:00	W # War


Rule	US	1945	only	-	Aug	14	23:00u	1:00	P # Peace


Rule	US	1945	only	-	Sep	30	2:00	0	S


Rule	US	1967	2006	-	Oct	lastSun	2:00	0	S


Rule	US	1967	1973	-	Apr	lastSun	2:00	1:00	D


Rule	US	1974	only	-	Jan	6	2:00	1:00	D


Rule	US	1975	only	-	Feb	23	2:00	1:00	D


Rule	US	1976	1986	-	Apr	lastSun	2:00	1:00	D


Rule	US	1987	2006	-	Apr	Sun>=1	2:00	1:00	D


Rule	US	2007	max	-	Mar	Sun>=8	2:00	1:00	D


Rule	US	2007	max	-	Nov	Sun>=1	2:00	0	S





# From Arthur David Olson, 2005-12-19


# We generate the files specified below to guard against old files with


# obsolete information being left in the time zone binary directory.


# We limit the list to names that have appeared in previous versions of


# this time zone package.


# We do these as separate Zones rather than as Links to avoid problems if


# a particular place changes whether it observes DST.


# We put these specifications here in the northamerica file both to


# increase the chances that they'll actually get compiled and to


# avoid the need to duplicate the US rules in another file.





# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone	EST		 -5:00	-	EST


Zone	MST		 -7:00	-	MST


Zone	HST		-10:00	-	HST


Zone	EST5EDT		 -5:00	US	E%sT


Zone	CST6CDT		 -6:00	US	C%sT


Zone	MST7MDT		 -7:00	US	M%sT


Zone	PST8PDT		 -8:00	US	P%sT





# From Bob Devine (1988-01-28):


# ...Alaska (and Hawaii) had the timezone names changed in 1967.


#    old			 new


#    Pacific Standard Time(PST)  -same-


#    Yukon Standard Time(YST)    -same-


#    Central Alaska S.T. (CAT)   Alaska-Hawaii St[an]dard Time (AHST)


#    Nome Standard Time (NT)     Bering Standard Time (BST)


#


# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz.


#    The YST zone now covers nearly all of the state, AHST just part


#    of the Aleutian islands.   No DST.





# From Paul Eggert (1995-12-19):


# The tables below use `NST', not `NT', for Nome Standard Time.


# I invented `CAWT' for Central Alaska War Time.





# From U. S. Naval Observatory (1989-01-19):


# USA  EASTERN       5 H  BEHIND UTC    NEW YORK, WASHINGTON


# USA  EASTERN       4 H  BEHIND UTC    APR 3 - OCT 30


# USA  CENTRAL       6 H  BEHIND UTC    CHICAGO, HOUSTON


# USA  CENTRAL       5 H  BEHIND UTC    APR 3 - OCT 30


# USA  MOUNTAIN      7 H  BEHIND UTC    DENVER


# USA  MOUNTAIN      6 H  BEHIND UTC    APR 3 - OCT 30


# USA  PACIFIC       8 H  BEHIND UTC    L.A., SAN FRANCISCO


# USA  PACIFIC       7 H  BEHIND UTC    APR 3 - OCT 30


# USA  ALASKA STD    9 H  BEHIND UTC    MOST OF ALASKA     (AKST)


# USA  ALASKA STD    8 H  BEHIND UTC    APR 3 - OCT 30 (AKDT)


# USA  ALEUTIAN     10 H  BEHIND UTC    ISLANDS WEST OF 170W


# USA  - " -         9 H  BEHIND UTC    APR 3 - OCT 30


# USA  HAWAII       10 H  BEHIND UTC


# USA  BERING       11 H  BEHIND UTC    SAMOA, MIDWAY





# From Arthur David Olson (1989-01-21):


# The above dates are for 1988.


# Note the "AKST" and "AKDT" abbreviations, the claim that there's


# no DST in Samoa, and the claim that there is DST in Alaska and the


# Aleutians.





# From Arthur David Olson (1988-02-13):


# Legal standard time zone names, from United States Code (1982 Edition and


# Supplement III), Title 15, Chapter 6, Section 260 and forward.  First, names


# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966


# took effect), as explained in sections 263 and 261:


#	(none)


#	United States standard eastern time


#	United States standard mountain time


#	United States standard central time


#	United States standard Pacific time


#	(none)


#	United States standard Alaska time


#	(none)


# Next, names from 1967-04-01 until 1983-11-30 (the date for


# public law 98-181):


#	Atlantic standard time


#	eastern standard time


#	central standard time


#	mountain standard time


#	Pacific standard time


#	Yukon standard time


#	Alaska-Hawaii standard time


#	Bering standard time


# And after 1983-11-30:


#	Atlantic standard time


#	eastern standard time


#	central standard time


#	mountain standard time


#	Pacific standard time


#	Alaska standard time


#	Hawaii-Aleutian standard time


#	Samoa standard time


# The law doesn't give abbreviations.


#


# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:


# Public law 106-564 (2000-12-23) introduced the abbreviation


# "Chamorro Standard Time" for time in Guam and the Northern Marianas.


# See the file "australasia".





# From Arthur David Olson, 2005-08-09


# The following was signed into law on 2005-08-08.


#


# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.


#   (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15


#   U.S.C. 260a(a)) is amended--


#     (1) by striking `first Sunday of April' and inserting `second


#     Sunday of March'; and


#     (2) by striking `last Sunday of October' and inserting `first


#     Sunday of November'.


#   (b) Effective Date- Subsection (a) shall take effect 1 year after the


#   date of enactment of this Act or March 1, 2007, whichever is later.


#   (c) Report to Congress- Not later than 9 months after the effective


#   date stated in subsection (b), the Secretary shall report to Congress


#   on the impact of this section on energy consumption in the United


#   States.


#   (d) Right to Revert- Congress retains the right to revert the


#   Daylight Saving Time back to the 2005 time schedules once the


#   Department study is complete.





# US eastern time, represented by New York





# Connecticut, Delaware, District of Columbia, most of Florida,


# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky


# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts,


# New Hampshire, New Jersey, New York, North Carolina, Ohio,


# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee,


# Vermont, Virginia, West Virginia





# From Dave Cantor (2004-11-02):


# Early this summer I had the occasion to visit the Mount Washington


# Observatory weather station atop (of course!) Mount Washington [, NH]....


# One of the staff members said that the station was on Eastern Standard Time


# and didn't change their clocks for Daylight Saving ... so that their


# reports will always have times which are 5 hours behind UTC.





# From Paul Eggert (2005-08-26):


# According to today's Huntsville Times


# <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1>


# a few towns on Alabama's "eastern border with Georgia, such as Phenix City


# in Russell County, Lanett in Chambers County and some towns in Lee County,


# set their watches and clocks on Eastern time."  It quotes H.H. "Bubba"


# Roberts, city administrator in Phenix City. as saying "We are in the Central


# time zone, but we do go by the Eastern time zone because so many people work


# in Columbus."





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER


Rule	NYC	1920	only	-	Mar	lastSun	2:00	1:00	D


Rule	NYC	1920	only	-	Oct	lastSun	2:00	0	S


Rule	NYC	1921	1966	-	Apr	lastSun	2:00	1:00	D


Rule	NYC	1921	1954	-	Sep	lastSun	2:00	0	S


Rule	NYC	1955	1966	-	Oct	lastSun	2:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/New_York	-4:56:02 -	LMT	1883 Nov 18 12:03:58


			-5:00	US	E%sT	1920


			-5:00	NYC	E%sT	1942


			-5:00	US	E%sT	1946


			-5:00	NYC	E%sT	1967


			-5:00	US	E%sT





# US central time, represented by Chicago





# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,


# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and


# Washington counties), Illinois, western Indiana


# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,


# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western


# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern


# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,


# western Tennessee, most of Texas, Wisconsin





# From Larry M. Smith (2006-04-26) re Wisconsin:


# http://www.legis.state.wi.us/statutes/Stat0175.pdf ...


# is currently enforced at the 01:00 time of change.  Because the local


# "bar time" in the state corresponds to 02:00, a number of citations


# are issued for the "sale of class 'B' alcohol after prohibited


# hours" within the deviated hour of this change every year....


#


# From Douglas R. Bomberg (2007-03-12):


# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI


# Statue 175 closer in synch with the US Congress' intent....


# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER


Rule	Chicago	1920	only	-	Jun	13	2:00	1:00	D


Rule	Chicago	1920	1921	-	Oct	lastSun	2:00	0	S


Rule	Chicago	1921	only	-	Mar	lastSun	2:00	1:00	D


Rule	Chicago	1922	1966	-	Apr	lastSun	2:00	1:00	D


Rule	Chicago	1922	1954	-	Sep	lastSun	2:00	0	S


Rule	Chicago	1955	1966	-	Oct	lastSun	2:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Chicago	-5:50:36 -	LMT	1883 Nov 18 12:09:24


			-6:00	US	C%sT	1920


			-6:00	Chicago	C%sT	1936 Mar  1 2:00


			-5:00	-	EST	1936 Nov 15 2:00


			-6:00	Chicago	C%sT	1942


			-6:00	US	C%sT	1946


			-6:00	Chicago	C%sT	1967


			-6:00	US	C%sT


# Oliver County, ND switched from mountain to central time on 1992-10-25.


Zone America/North_Dakota/Center -6:45:12 - LMT	1883 Nov 18 12:14:48


			-7:00	US	M%sT	1992 Oct 25 02:00


			-6:00	US	C%sT


# Morton County, ND, switched from mountain to central time on


# 2003-10-26, except for the area around Mandan which was already central time.


# See <http://dmses.dot.gov/docimages/p63/135818.pdf>.


# Officially this switch also included part of Sioux County, and


# Jones, Mellette, and Todd Counties in South Dakota;


# but in practice these other counties were already observing central time.


# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.


Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21


			-7:00	US	M%sT	2003 Oct 26 02:00


			-6:00	US	C%sT





# From Josh Findley (2011-01-21):


# ...it appears that Mercer County, North Dakota, changed from the


# mountain time zone to the central time zone at the last transition from


# daylight-saving to standard time (on Nov. 7, 2010):


# <a href="http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm">


# http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm


# </a>


# <a href="http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html">


# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html


# </a>





# From Andy Lipscomb (2011-01-24):


# ...according to the Census Bureau, the largest city is Beulah (although


# it's commonly referred to as Beulah-Hazen, with Hazen being the next


# largest city in Mercer County).  Google Maps places Beulah's city hall


# at 4715'51" north, 10146'40" west, which yields an offset of 6h47'07".





Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53


			-7:00	US	M%sT	2010 Nov  7 2:00


			-6:00	US	C%sT





# US mountain time, represented by Denver


#


# Colorado, far western Kansas, Montana, western


# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City),


# New Mexico, southwestern North Dakota,


# western South Dakota, far western Texas (El Paso County, Hudspeth County,


# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming


#


# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER


Rule	Denver	1920	1921	-	Mar	lastSun	2:00	1:00	D


Rule	Denver	1920	only	-	Oct	lastSun	2:00	0	S


Rule	Denver	1921	only	-	May	22	2:00	0	S


Rule	Denver	1965	1966	-	Apr	lastSun	2:00	1:00	D


Rule	Denver	1965	1966	-	Oct	lastSun	2:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Denver	-6:59:56 -	LMT	1883 Nov 18 12:00:04


			-7:00	US	M%sT	1920


			-7:00	Denver	M%sT	1942


			-7:00	US	M%sT	1946


			-7:00	Denver	M%sT	1967


			-7:00	US	M%sT





# US Pacific time, represented by Los Angeles


#


# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,


# Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties,


# and the northern three-quarters of Idaho county),


# most of Nevada, most of Oregon, and Washington


#


# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER


Rule	CA	1948	only	-	Mar	14	2:00	1:00	D


Rule	CA	1949	only	-	Jan	 1	2:00	0	S


Rule	CA	1950	1966	-	Apr	lastSun	2:00	1:00	D


Rule	CA	1950	1961	-	Sep	lastSun	2:00	0	S


Rule	CA	1962	1966	-	Oct	lastSun	2:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Los_Angeles -7:52:58 -	LMT	1883 Nov 18 12:07:02


			-8:00	US	P%sT	1946


			-8:00	CA	P%sT	1967


			-8:00	US	P%sT





# Alaska


# AK%sT is the modern abbreviation for -9:00 per USNO.


#


# From Paul Eggert (2001-05-30):


# Howse writes that Alaska switched from the Julian to the Gregorian calendar,


# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.


# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian,


# also a Friday.  Include only the time zone part of this transition,


# ignoring the switch from Julian to Gregorian, since we can't represent


# the Julian calendar.


#


# As far as we know, none of the exact locations mentioned below were


# permanently inhabited in 1867 by anyone using either calendar.


# (Yakutat was colonized by the Russians in 1799, but the settlement


# was destroyed in 1805 by a Yakutat-kon war party.)  However, there


# were nearby inhabitants in some cases and for our purposes perhaps


# it's best to simply use the official transition.


#





# From Steve Ferguson (2011-01-31):


# The author lives in Alaska and many of the references listed are only


# available to Alaskan residents.


#


# <a href="http://www.alaskahistoricalsociety.org/index.cfm?section=discover%20alaska&page=Glimpses%20of%20the%20Past&viewpost=2&ContentId=98">


# http://www.alaskahistoricalsociety.org/index.cfm?section=discover%20alaska&page=Glimpses%20of%20the%20Past&viewpost=2&ContentId=98


# </a>





# From Arthur David Olson (2011-02-01):


# Here's database-relevant material from the 2001 "Alaska History" article:


#


# On September 20 [1979]...DOT...officials decreed that on April 27,


# 1980, Juneau and other nearby communities would move to Yukon Time.


# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on


# Pacific Time.


#


# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the


# Department's September 1979 decision. Juneau and other communities in


# northern Southeast reverted to Pacific Time on October 26.


#


# On October 28 [1983]...the Metlakatla Indian Community Council voted


# unanimously to keep the reservation on Pacific Time.


#


# According to DOT official Joanne Petrie, Indian reservations are not


# bound to follow time zones imposed by neighboring jurisdictions.


#


# (The last is consistent with how the database now handles the Navajo


# Nation.)





# From Arthur David Olson (2011-02-09):


# I just spoke by phone with a staff member at the Metlakatla Indian


# Community office (using contact information available at


# <a href="http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla">


# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla


# </a>).


# It's shortly after 1:00 here on the east coast of the United States;


# the staffer said it was shortly after 10:00 there. When I asked whether


# that meant they were on Pacific time, they said no--they were on their


# own time. I asked about daylight saving; they said it wasn't used. I


# did not inquire about practices in the past.





# From Arthur David Olson (2011-08-17):


# For lack of better information, assume that Metlakatla's


# abandonment of use of daylight saving resulted from the 1983 vote.





# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Juneau	 15:02:19 -	LMT	1867 Oct 18


			 -8:57:41 -	LMT	1900 Aug 20 12:00


			 -8:00	-	PST	1942


			 -8:00	US	P%sT	1946


			 -8:00	-	PST	1969


			 -8:00	US	P%sT	1980 Apr 27 2:00


			 -9:00	US	Y%sT	1980 Oct 26 2:00


			 -8:00	US	P%sT	1983 Oct 30 2:00


			 -9:00	US	Y%sT	1983 Nov 30


			 -9:00	US	AK%sT


Zone America/Sitka	 14:58:47 -	LMT	1867 Oct 18


			 -9:01:13 -	LMT	1900 Aug 20 12:00


			 -8:00	-	PST	1942


			 -8:00	US	P%sT	1946


			 -8:00	-	PST	1969


			 -8:00	US	P%sT	1983 Oct 30 2:00


			 -9:00	US	Y%sT	1983 Nov 30


			 -9:00	US	AK%sT


Zone America/Metlakatla	 15:13:42 -	LMT	1867 Oct 18


			 -8:46:18 -	LMT	1900 Aug 20 12:00


			 -8:00	-	PST	1942


			 -8:00	US	P%sT	1946


			 -8:00	-	PST	1969


			 -8:00	US	P%sT	1983 Oct 30 2:00


			 -8:00	-	MeST


Zone America/Yakutat	 14:41:05 -	LMT	1867 Oct 18


			 -9:18:55 -	LMT	1900 Aug 20 12:00


			 -9:00	-	YST	1942


			 -9:00	US	Y%sT	1946


			 -9:00	-	YST	1969


			 -9:00	US	Y%sT	1983 Nov 30


			 -9:00	US	AK%sT


Zone America/Anchorage	 14:00:24 -	LMT	1867 Oct 18


			 -9:59:36 -	LMT	1900 Aug 20 12:00


			-10:00	-	CAT	1942


			-10:00	US	CAT/CAWT 1945 Aug 14 23:00u


			-10:00	US	CAT/CAPT 1946 # Peace


			-10:00	-	CAT	1967 Apr


			-10:00	-	AHST	1969


			-10:00	US	AH%sT	1983 Oct 30 2:00


			 -9:00	US	Y%sT	1983 Nov 30


			 -9:00	US	AK%sT


Zone America/Nome	 12:58:21 -	LMT	1867 Oct 18


			-11:01:38 -	LMT	1900 Aug 20 12:00


			-11:00	-	NST	1942


			-11:00	US	N%sT	1946


			-11:00	-	NST	1967 Apr


			-11:00	-	BST	1969


			-11:00	US	B%sT	1983 Oct 30 2:00


			 -9:00	US	Y%sT	1983 Nov 30


			 -9:00	US	AK%sT


Zone America/Adak	 12:13:21 -	LMT	1867 Oct 18


			-11:46:38 -	LMT	1900 Aug 20 12:00


			-11:00	-	NST	1942


			-11:00	US	N%sT	1946


			-11:00	-	NST	1967 Apr


			-11:00	-	BST	1969


			-11:00	US	B%sT	1983 Oct 30 2:00


			-10:00	US	AH%sT	1983 Nov 30


			-10:00	US	HA%sT


# The following switches don't quite make our 1970 cutoff.


#


# Shanks writes that part of southwest Alaska (e.g. Aniak)


# switched from -11:00 to -10:00 on 1968-09-22 at 02:00,


# and another part (e.g. Akiak) made the same switch five weeks later.


#


# From David Flater (2004-11-09):


# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska


# Historic Preservation Commission, provided this information, which


# suggests that Unalaska deviated from statutory time from early 1967


# possibly until 1983:


#


#  Minutes of the Unalaska City Council Meeting, January 10, 1967:


#  "Except for St. Paul and Akutan, Unalaska is the only important


#  location not on Alaska Standard Time.  The following resolution was


#  made by William Robinson and seconded by Henry Swanson:  Be it


#  resolved that the City of Unalaska hereby goes to Alaska Standard


#  Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday,


#  January 14, Alaska Standard Time.)  This resolution was passed with


#  three votes for and one against."





# Hawaii





# From Arthur David Olson (2010-12-09):


# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225


# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09,


# the article is available at


# <a href="http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf">


# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf


# </a>


# and indicates that standard time was adopted effective noon, January


# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight


# saving for the period between the last Sunday of each April and the


# last Sunday of each September, but less than a month later repealed the


# act," (page 220), that year-round daylight saving time was in effect


# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for


# when clocks changed) and that clocks were changed by 30 minutes


# effective the second Sunday of June, 1947 (page 219, with no time of


# day given for when clocks changed). A footnote for the 1933 changes


# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933)


# and Act 163 (approved 21 May 1933)."





# From Arthur David Olson (2011-01-19):


# The following is from "Laws of the Territory of Hawaii Passed by the


# Seventeenth Legislature: Regular Session 1933," available (as of


# 2011-01-19) at American University's Pence Law Library. Page 85: "Act


# 90...At 2 o'clock ante meridian of the last Sunday in April of each


# year, the standard time of this Territory shall be advanced one


# hour...This Act shall take effect upon its approval. Approved this 26th


# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of


# Hawaii." Page 172:  "Act 163...Act 90 of the Session Laws of 1933 is


# hereby repealed...This Act shall take effect upon its approval, upon


# which date the standard time of this Territory shall be restored to


# that existing immediately prior to the taking effect of said Act 90.


# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor


# of the Territory of Hawaii."


#


# Note that 1933-05-21 was a Sunday.


# We're left to guess the time of day when Act 163 was approved; guess noon.





Zone Pacific/Honolulu	-10:31:26 -	LMT	1896 Jan 13 12:00 #Schmitt&Cox


			-10:30	-	HST	1933 Apr 30 2:00 #Laws 1933


			-10:30	1:00	HDT	1933 May 21 12:00 #Laws 1933+12


			-10:30	-	HST	1942 Feb 09 2:00 #Schmitt&Cox+2


			-10:30	1:00	HDT	1945 Sep 30 2:00 #Schmitt&Cox+2


			-10:30	-	HST	1947 Jun  8 2:00 #Schmitt&Cox+2


			-10:00	-	HST





# Now we turn to US areas that have diverged from the consensus since 1970.





# Arizona mostly uses MST.





# From Paul Eggert (2002-10-20):


#


# The information in the rest of this paragraph is derived from the


# <a href="http://www.dlapr.lib.az.us/links/daylight.htm">


# Daylight Saving Time web page (2002-01-23)</a> maintained by the


# Arizona State Library, Archives and Public Records.


# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard


# time, but by federal law railroads, airlines, bus lines, military


# personnel, and some engaged in interstate commerce continued to


# observe war (i.e., daylight saving) time.  The 1944-03-17 Phoenix


# Gazette says that was the date the law changed, and that 04-01 was


# the date the state's clocks would change.  In 1945 the State of


# Arizona used standard time all year, again with exceptions only as


# mandated by federal law.  Arizona observed DST in 1967, but Arizona


# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.


#


# Shanks says the 1944 experiment came to an end on 1944-03-17.


# Go with the Arizona State Library instead.





Zone America/Phoenix	-7:28:18 -	LMT	1883 Nov 18 11:31:42


			-7:00	US	M%sT	1944 Jan  1 00:01


			-7:00	-	MST	1944 Apr  1 00:01


			-7:00	US	M%sT	1944 Oct  1 00:01


			-7:00	-	MST	1967


			-7:00	US	M%sT	1968 Mar 21


			-7:00	-	MST


# From Arthur David Olson (1988-02-13):


# A writer from the Inter Tribal Council of Arizona, Inc.,


# notes in private correspondence dated 1987-12-28 that "Presently, only the


# Navajo Nation participates in the Daylight Saving Time policy, due to its


# large size and location in three states."  (The "only" means that other


# tribal nations don't use DST.)





Link America/Denver America/Shiprock





# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,


# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,


# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,


# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,


# Teton, Twin Falls, Valley, Washington counties, and the southern


# quarter of Idaho county) and eastern Oregon (most of Malheur County)


# switched four weeks late in 1974.


#


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Boise	-7:44:49 -	LMT	1883 Nov 18 12:15:11


			-8:00	US	P%sT	1923 May 13 2:00


			-7:00	US	M%sT	1974


			-7:00	-	MST	1974 Feb  3 2:00


			-7:00	US	M%sT





# Indiana


#


# For a map of Indiana's time zone regions, see:


# <a href="http://www.mccsc.edu/time.html">


# What time is it in Indiana?


# </a> (2006-03-01)


#


# From Paul Eggert (2007-08-17):


# Since 1970, most of Indiana has been like America/Indiana/Indianapolis,


# with the following exceptions:


#


# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,


#   Vandenburgh, and Warrick counties have been like America/Chicago.


#


# - Dearborn and Ohio counties have been like America/New_York.


#


# - Clark, Floyd, and Harrison counties have been like


#   America/Kentucky/Louisville.


#


# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke,


#   and Switzerland counties have their own time zone histories as noted below.


#


# Shanks partitioned Indiana into 345 regions, each with its own time history,


# and wrote ``Even newspaper reports present contradictory information.''


# Those Hoosiers!  Such a flighty and changeable people!


# Fortunately, most of the complexity occurred before our cutoff date of 1970.


#


# Other than Indianapolis, the Indiana place names are so nondescript


# that they would be ambiguous if we left them at the `America' level.


# So we reluctantly put them all in a subdirectory `America/Indiana'.





# From Paul Eggert (2005-08-16):


# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006.





# From Nathan Stratton Treadway (2006-03-30):


# http://www.dot.gov/affairs/dot0406.htm [3705 B]


# From Deborah Goldsmith (2006-01-18):


# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB]


# From Paul Eggert (2006-01-20):


# It says "DOT is relocating the time zone boundary in Indiana to move Starke,


# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the


# Eastern Time Zone to the Central Time Zone.... The effective date of


# this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the


# changeover date from standard time to Daylight Saving Time."


# Strictly speaking, this means the affected counties will change their


# clocks twice that night, but this obviously is in error.  The intent


# is that 01:59:59 EST be followed by 02:00:00 CDT.





# From Gwillim Law (2007-02-10):


# The Associated Press has been reporting that Pulaski County, Indiana is


# going to switch from Central to Eastern Time on March 11, 2007....


# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER


Rule Indianapolis 1941	only	-	Jun	22	2:00	1:00	D


Rule Indianapolis 1941	1954	-	Sep	lastSun	2:00	0	S


Rule Indianapolis 1946	1954	-	Apr	lastSun	2:00	1:00	D


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22


			-6:00	US	C%sT	1920


			-6:00 Indianapolis C%sT	1942


			-6:00	US	C%sT	1946


			-6:00 Indianapolis C%sT	1955 Apr 24 2:00


			-5:00	-	EST	1957 Sep 29 2:00


			-6:00	-	CST	1958 Apr 27 2:00


			-5:00	-	EST	1969


			-5:00	US	E%sT	1971


			-5:00	-	EST	2006


			-5:00	US	E%sT


#


# Eastern Crawford County, Indiana, left its clocks alone in 1974,


# as well as from 1976 through 2005.


# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER


Rule	Marengo	1951	only	-	Apr	lastSun	2:00	1:00	D


Rule	Marengo	1951	only	-	Sep	lastSun	2:00	0	S


Rule	Marengo	1954	1960	-	Apr	lastSun	2:00	1:00	D


Rule	Marengo	1954	1960	-	Sep	lastSun	2:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Indiana/Marengo -5:45:23 -	LMT	1883 Nov 18 12:14:37


			-6:00	US	C%sT	1951


			-6:00	Marengo	C%sT	1961 Apr 30 2:00


			-5:00	-	EST	1969


			-5:00	US	E%sT	1974 Jan  6 2:00


			-6:00	1:00	CDT	1974 Oct 27 2:00


			-5:00	US	E%sT	1976


			-5:00	-	EST	2006


			-5:00	US	E%sT


#


# Daviess, Dubois, Knox, and Martin Counties, Indiana,


# switched from eastern to central time in April 2006, then switched back


# in November 2007.


# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER


Rule Vincennes	1946	only	-	Apr	lastSun	2:00	1:00	D


Rule Vincennes	1946	only	-	Sep	lastSun	2:00	0	S


Rule Vincennes	1953	1954	-	Apr	lastSun	2:00	1:00	D


Rule Vincennes	1953	1959	-	Sep	lastSun	2:00	0	S


Rule Vincennes	1955	only	-	May	 1	0:00	1:00	D


Rule Vincennes	1956	1963	-	Apr	lastSun	2:00	1:00	D


Rule Vincennes	1960	only	-	Oct	lastSun	2:00	0	S


Rule Vincennes	1961	only	-	Sep	lastSun	2:00	0	S


Rule Vincennes	1962	1963	-	Oct	lastSun	2:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Indiana/Vincennes -5:50:07 - LMT	1883 Nov 18 12:09:53


			-6:00	US	C%sT	1946


			-6:00 Vincennes	C%sT	1964 Apr 26 2:00


			-5:00	-	EST	1969


			-5:00	US	E%sT	1971


			-5:00	-	EST	2006 Apr  2 2:00


			-6:00	US	C%sT	2007 Nov  4 2:00


			-5:00	US	E%sT


#


# Perry County, Indiana, switched from eastern to central time in April 2006.


# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER


Rule Perry	1946	only	-	Apr	lastSun	2:00	1:00	D


Rule Perry	1946	only	-	Sep	lastSun	2:00	0	S


Rule Perry	1953	1954	-	Apr	lastSun	2:00	1:00	D


Rule Perry	1953	1959	-	Sep	lastSun	2:00	0	S


Rule Perry	1955	only	-	May	 1	0:00	1:00	D


Rule Perry	1956	1963	-	Apr	lastSun	2:00	1:00	D


Rule Perry	1960	only	-	Oct	lastSun	2:00	0	S


Rule Perry	1961	only	-	Sep	lastSun	2:00	0	S


Rule Perry	1962	1963	-	Oct	lastSun	2:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Indiana/Tell_City -5:47:03 - LMT	1883 Nov 18 12:12:57


			-6:00	US	C%sT	1946


			-6:00 Perry	C%sT	1964 Apr 26 2:00


			-5:00	-	EST	1969


			-5:00	US	E%sT	1971


			-5:00	-	EST	2006 Apr  2 2:00


			-6:00	US	C%sT


#


# Pike County, Indiana moved from central to eastern time in 1977,


# then switched back in 2006, then switched back again in 2007.


# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER


Rule	Pike	1955	only	-	May	 1	0:00	1:00	D


Rule	Pike	1955	1960	-	Sep	lastSun	2:00	0	S


Rule	Pike	1956	1964	-	Apr	lastSun	2:00	1:00	D


Rule	Pike	1961	1964	-	Oct	lastSun	2:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Indiana/Petersburg -5:49:07 - LMT	1883 Nov 18 12:10:53


			-6:00	US	C%sT	1955


			-6:00	Pike	C%sT	1965 Apr 25 2:00


			-5:00	-	EST	1966 Oct 30 2:00


			-6:00	US	C%sT	1977 Oct 30 2:00


			-5:00	-	EST	2006 Apr  2 2:00


			-6:00	US	C%sT	2007 Nov  4 2:00


			-5:00	US	E%sT


#


# Starke County, Indiana moved from central to eastern time in 1991,


# then switched back in 2006.


# From Arthur David Olson (1991-10-28):


# An article on page A3 of the Sunday, 1991-10-27 Washington Post


# notes that Starke County switched from Central time to Eastern time as of


# 1991-10-27.


# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER


Rule	Starke	1947	1961	-	Apr	lastSun	2:00	1:00	D


Rule	Starke	1947	1954	-	Sep	lastSun	2:00	0	S


Rule	Starke	1955	1956	-	Oct	lastSun	2:00	0	S


Rule	Starke	1957	1958	-	Sep	lastSun	2:00	0	S


Rule	Starke	1959	1961	-	Oct	lastSun	2:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Indiana/Knox -5:46:30 -	LMT	1883 Nov 18 12:13:30


			-6:00	US	C%sT	1947


			-6:00	Starke	C%sT	1962 Apr 29 2:00


			-5:00	-	EST	1963 Oct 27 2:00


			-6:00	US	C%sT	1991 Oct 27 2:00


			-5:00	-	EST	2006 Apr  2 2:00


			-6:00	US	C%sT


#


# Pulaski County, Indiana, switched from eastern to central time in


# April 2006 and then switched back in March 2007.


# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER


Rule	Pulaski	1946	1960	-	Apr	lastSun	2:00	1:00	D


Rule	Pulaski	1946	1954	-	Sep	lastSun	2:00	0	S


Rule	Pulaski	1955	1956	-	Oct	lastSun	2:00	0	S


Rule	Pulaski	1957	1960	-	Sep	lastSun	2:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Indiana/Winamac -5:46:25 - LMT	1883 Nov 18 12:13:35


			-6:00	US	C%sT	1946


			-6:00	Pulaski	C%sT	1961 Apr 30 2:00


			-5:00	-	EST	1969


			-5:00	US	E%sT	1971


			-5:00	-	EST	2006 Apr  2 2:00


			-6:00	US	C%sT	2007 Mar 11 2:00


			-5:00	US	E%sT


#


# Switzerland County, Indiana, did not observe DST from 1973 through 2005.


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Indiana/Vevay -5:40:16 -	LMT	1883 Nov 18 12:19:44


			-6:00	US	C%sT	1954 Apr 25 2:00


			-5:00	-	EST	1969


			-5:00	US	E%sT	1973


			-5:00	-	EST	2006


			-5:00	US	E%sT





# Part of Kentucky left its clocks alone in 1974.


# This also includes Clark, Floyd, and Harrison counties in Indiana.


# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER


Rule Louisville	1921	only	-	May	1	2:00	1:00	D


Rule Louisville	1921	only	-	Sep	1	2:00	0	S


Rule Louisville	1941	1961	-	Apr	lastSun	2:00	1:00	D


Rule Louisville	1941	only	-	Sep	lastSun	2:00	0	S


Rule Louisville	1946	only	-	Jun	2	2:00	0	S


Rule Louisville	1950	1955	-	Sep	lastSun	2:00	0	S


Rule Louisville	1956	1960	-	Oct	lastSun	2:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Kentucky/Louisville -5:43:02 -	LMT	1883 Nov 18 12:16:58


			-6:00	US	C%sT	1921


			-6:00 Louisville C%sT	1942


			-6:00	US	C%sT	1946


			-6:00 Louisville C%sT	1961 Jul 23 2:00


			-5:00	-	EST	1968


			-5:00	US	E%sT	1974 Jan  6 2:00


			-6:00	1:00	CDT	1974 Oct 27 2:00


			-5:00	US	E%sT


#


# Wayne County, Kentucky


#


# From


# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml">


# Lake Cumberland LIFE


# </a> (1999-01-29) via WKYM-101.7:


# Clinton County has joined Wayne County in asking the DoT to change from


# the Central to the Eastern time zone....  The Wayne County government made


# the same request in December.  And while Russell County officials have not


# taken action, the majority of respondents to a poll conducted there in


# August indicated they would like to change to "fast time" also.


# The three Lake Cumberland counties are the farthest east of any U.S.


# location in the Central time zone.


#


# From Rich Wales (2000-08-29):


# After prolonged debate, and despite continuing deep differences of opinion,


# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern


# (-0500) time.  They won't "fall back" this year.  See Sara Shipley,


# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).


#


# From Paul Eggert (2001-07-16):


# The final rule was published in the


# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22">


# Federal Register 65, 160 (2000-08-17), page 50154-50158.


# </a>


#


Zone America/Kentucky/Monticello -5:39:24 - LMT	1883 Nov 18 12:20:36


			-6:00	US	C%sT	1946


			-6:00	-	CST	1968


			-6:00	US	C%sT	2000 Oct 29  2:00


			-5:00	US	E%sT








# From Rives McDow (2000-08-30):


# Here ... are all the changes in the US since 1985.


# Kearny County, KS (put all of county on central;


#	previously split between MST and CST) ... 1990-10


# Starke County, IN (from CST to EST) ... 1991-10


# Oliver County, ND (from MST to CST) ... 1992-10


# West Wendover, NV (from PST TO MST) ... 1999-10


# Wayne County, KY (from CST to EST) ... 2000-10


#


# From Paul Eggert (2001-07-17):


# We don't know where the line used to be within Kearny County, KS,


# so omit that change for now.


# See America/Indiana/Knox for the Starke County, IN change.


# See America/North_Dakota/Center for the Oliver County, ND change.


# West Wendover, NV officially switched from Pacific to mountain time on


# 1999-10-31.  See the


# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15">


# Federal Register 64, 203 (1999-10-21), page 56705-56707.


# </a>


# However, the Federal Register says that West Wendover already operated


# on mountain time, and the rule merely made this official;


# hence a separate tz entry is not needed.





# Michigan


#


# From Bob Devine (1988-01-28):


# Michigan didn't observe DST from 1968 to 1973.


#


# From Paul Eggert (1999-03-31):


# Shanks writes that Michigan started using standard time on 1885-09-18,


# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01)


# that Detroit kept


#


#	local time until 1900 when the City Council decreed that clocks should


#	be put back twenty-eight minutes to Central Standard Time.  Half the


#	city obeyed, half refused.  After considerable debate, the decision


#	was rescinded and the city reverted to Sun time.  A derisive offer to


#	erect a sundial in front of the city hall was referred to the


#	Committee on Sewers.  Then, in 1905, Central time was adopted


#	by city vote.


#


# This story is too entertaining to be false, so go with Howse over Shanks.


#


# From Paul Eggert (2001-03-06):


# Garland (1927) writes ``Cleveland and Detroit advanced their clocks


# one hour in 1914.''  This change is not in Shanks.  We have no more


# info, so omit this for now.


#


# Most of Michigan observed DST from 1973 on, but was a bit late in 1975.


# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER


Rule	Detroit	1948	only	-	Apr	lastSun	2:00	1:00	D


Rule	Detroit	1948	only	-	Sep	lastSun	2:00	0	S


Rule	Detroit	1967	only	-	Jun	14	2:00	1:00	D


Rule	Detroit	1967	only	-	Oct	lastSun	2:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Detroit	-5:32:11 -	LMT	1905


			-6:00	-	CST	1915 May 15 2:00


			-5:00	-	EST	1942


			-5:00	US	E%sT	1946


			-5:00	Detroit	E%sT	1973


			-5:00	US	E%sT	1975


			-5:00	-	EST	1975 Apr 27 2:00


			-5:00	US	E%sT


#


# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan,


# switched from EST to CST/CDT in 1973.


# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER


Rule Menominee	1946	only	-	Apr	lastSun	2:00	1:00	D


Rule Menominee	1946	only	-	Sep	lastSun	2:00	0	S


Rule Menominee	1966	only	-	Apr	lastSun	2:00	1:00	D


Rule Menominee	1966	only	-	Oct	lastSun	2:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Menominee	-5:50:27 -	LMT	1885 Sep 18 12:00


			-6:00	US	C%sT	1946


			-6:00 Menominee	C%sT	1969 Apr 27 2:00


			-5:00	-	EST	1973 Apr 29 2:00


			-6:00	US	C%sT





# Navassa


# administered by the US Fish and Wildlife Service


# claimed by US under the provisions of the 1856 Guano Islands Act


# also claimed by Haiti


# occupied 1857/1900 by the Navassa Phosphate Co


# US lighthouse 1917/1996-09


# currently uninhabited


# see Mark Fineman, ``An Isle Rich in Guano and Discord'',


# _Los Angeles Times_ (1998-11-10), A1, A10; it cites


# Jimmy Skaggs, _The Great Guano Rush_ (1994).





################################################################################








# From Paul Eggert (2006-03-22):


# A good source for time zone historical data outside the U.S. is


# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),


# San Diego: ACS Publications, Inc. (2003).


#


# Gwillim Law writes that a good source


# for recent time zone data is the International Air Transport


# Association's Standard Schedules Information Manual (IATA SSIM),


# published semiannually.  Law sent in several helpful summaries


# of the IATA's data after 1990.


#


# Except where otherwise noted, Shanks & Pottenger is the source for


# entries through 1990, and IATA SSIM is the source for entries afterwards.


#


# Other sources occasionally used include:


#


#	Edward W. Whitman, World Time Differences,


#	Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),


#	which I found in the UCLA library.


#


#	<a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf">


#	William Willett, The Waste of Daylight, 19th edition


#	</a> (1914-03)


#


# See the `europe' file for Greenland.





# Canada





# From Alain LaBont<e'> (1994-11-14):


# I post here the time zone abbreviations standardized in Canada


# for both English and French in the CAN/CSA-Z234.4-89 standard....


#


#	UTC	Standard time	Daylight savings time


#	offset	French	English	French	English


#	-2:30	-	-	HAT	NDT


#	-3	-	-	HAA	ADT


#	-3:30	HNT	NST	-	-


#	-4	HNA	AST	HAE	EDT


#	-5	HNE	EST	HAC	CDT


#	-6	HNC	CST	HAR	MDT


#	-7	HNR	MST	HAP	PDT


#	-8	HNP	PST	HAY	YDT


#	-9	HNY	YST	-	-


#


#	HN: Heure Normale	ST: Standard Time


#	HA: Heure Avanc<e'>e	DT: Daylight saving Time


#


#	A: de l'Atlantique	Atlantic


#	C: du Centre		Central


#	E: de l'Est		Eastern


#	M:			Mountain


#	N:			Newfoundland


#	P: du Pacifique		Pacific


#	R: des Rocheuses


#	T: de Terre-Neuve


#	Y: du Yukon		Yukon


#


# From Paul Eggert (1994-11-22):


# Alas, this sort of thing must be handled by localization software.





# Unless otherwise specified, the data for Canada are all from Shanks


# & Pottenger.





# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31,


# 2007-03-01):


# The British Columbia government announced yesterday that it will


# adjust daylight savings next year to align with changes in the


# U.S. and the rest of Canada....


# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm


# ...


# Nova Scotia


# Daylight saving time will be extended by four weeks starting in 2007....


# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf


#


# [For New Brunswick] the new legislation dictates that the time change is to


# be done at 02:00 instead of 00:01.


# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf


# ...


# Manitoba has traditionally changed the clock every fall at 03:00.


# As of 2006, the transition is to take place one hour earlier at 02:00.


# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php


# ...


# [Alberta, Ontario, Quebec] will follow US rules.


# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM


# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm


# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF


# ...


# P.E.I. will follow US rules....


# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf


# ...


# Province of Newfoundland and Labrador....


# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm


# ...


# Yukon


# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf


# ...


# N.W.T. will follow US rules.  Whoever maintains the government web site


# does not seem to believe in bookmarks.  To see the news release, click the


# following link and search for "Daylight Savings Time Change".  Press the


# "Daylight Savings Time Change" link; it will fire off a popup using


# JavaScript.


# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive


# ...


# Nunavut


# An amendment to the Interpretation Act was registered on February 19/2007....


# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf





# From Paul Eggert (2006-04-25):


# H. David Matthews and Mary Vincent's map


# <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp">


# "It's about TIME", _Canadian Geographic_ (September-October 1998)


# </a> contains detailed boundaries for regions observing nonstandard


# time and daylight saving time arrangements in Canada circa 1998.


#


# INMS, the Institute for National Measurement Standards in Ottawa, has <a


# href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php">


# information about standard and daylight saving time zones in Canada.


# </a> (updated periodically).


# Its unofficial information is often taken from Matthews and Vincent.





# From Paul Eggert (2006-06-27):


# For now, assume all of DST-observing Canada will fall into line with the


# new US DST rules,





# From Chris Walton (2011-12-01)


# In the first of Tammy Hardwick's articles


# <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260">


# http://www.ilovecreston.com/?p=articles&t=spec&ar=260


# </a>


# she quotes the Friday November 1/1918 edition of the Creston Review.


# The quote includes these two statements:


# 'Sunday the CPR went back to the old system of time...'


# '... The daylight saving scheme was dropped all over Canada at the same time,'


# These statements refer to a transition from daylight time to standard time


# that occurred nationally on Sunday October 27/1918.  This transition was


# also documented in the Saturday October 26/1918 edition of the Toronto Star.





# In light of that evidence, we alter the date from the earlier believed


# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day


# than Thursday) in all Canadian rulesets.





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	Canada	1918	only	-	Apr	14	2:00	1:00	D


Rule	Canada	1918	only	-	Oct	27	2:00	0	S


Rule	Canada	1942	only	-	Feb	 9	2:00	1:00	W # War


Rule	Canada	1945	only	-	Aug	14	23:00u	1:00	P # Peace


Rule	Canada	1945	only	-	Sep	30	2:00	0	S


Rule	Canada	1974	1986	-	Apr	lastSun	2:00	1:00	D


Rule	Canada	1974	2006	-	Oct	lastSun	2:00	0	S


Rule	Canada	1987	2006	-	Apr	Sun>=1	2:00	1:00	D


Rule	Canada	2007	max	-	Mar	Sun>=8	2:00	1:00	D


Rule	Canada	2007	max	-	Nov	Sun>=1	2:00	0	S








# Newfoundland and Labrador





# From Paul Eggert (2000-10-02):


# Matthews and Vincent (1998) write that Labrador should use NST/NDT,


# but the only part of Labrador that follows the rules is the


# southeast corner, including Port Hope Simpson and Mary's Harbour,


# but excluding, say, Black Tickle.





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	StJohns	1917	only	-	Apr	 8	2:00	1:00	D


Rule	StJohns	1917	only	-	Sep	17	2:00	0	S


# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger.


Rule	StJohns	1919	only	-	May	 5	23:00	1:00	D


Rule	StJohns	1919	only	-	Aug	12	23:00	0	S


# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger.


Rule	StJohns	1920	1935	-	May	Sun>=1	23:00	1:00	D


Rule	StJohns	1920	1935	-	Oct	lastSun	23:00	0	S


# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks &


# Pottenger.


Rule	StJohns	1936	1941	-	May	Mon>=9	0:00	1:00	D


Rule	StJohns	1936	1941	-	Oct	Mon>=2	0:00	0	S


# Whitman gives the following transitions:


# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07


# but go with Shanks & Pottenger and assume they used Canadian rules.


# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives


# Apr 30 - Sep 24; go with Shanks & Pottenger.


Rule	StJohns	1946	1950	-	May	Sun>=8	2:00	1:00	D


Rule	StJohns	1946	1950	-	Oct	Sun>=2	2:00	0	S


Rule	StJohns	1951	1986	-	Apr	lastSun	2:00	1:00	D


Rule	StJohns	1951	1959	-	Sep	lastSun	2:00	0	S


Rule	StJohns	1960	1986	-	Oct	lastSun	2:00	0	S


# From Paul Eggert (2000-10-02):


# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches


# at 00:01 local time.  For now, assume it started in 1987.





# From Michael Pelley (2011-09-12):


# We received today, Monday, September 12, 2011, notification that the


# changes to the Newfoundland Standard Time Act have been proclaimed.


# The change in the Act stipulates that the change from Daylight Savings


# Time to Standard Time and from Standard Time to Daylight Savings Time


# now occurs at 2:00AM.


# ...


# <a href="http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm">


# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm


# </a>


# ...


# MICHAEL PELLEY  |  Manager of Enterprise Architecture - Solution Delivery


# Office of the Chief Information Officer


# Executive Council


# Government of Newfoundland & Labrador





Rule	StJohns	1987	only	-	Apr	Sun>=1	0:01	1:00	D


Rule	StJohns	1987	2006	-	Oct	lastSun	0:01	0	S


Rule	StJohns	1988	only	-	Apr	Sun>=1	0:01	2:00	DD


Rule	StJohns	1989	2006	-	Apr	Sun>=1	0:01	1:00	D


Rule	StJohns	2007	2011	-	Mar	Sun>=8	0:01	1:00	D


Rule	StJohns	2007	2010	-	Nov	Sun>=1	0:01	0	S


#


# St John's has an apostrophe, but Posix file names can't have apostrophes.


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/St_Johns	-3:30:52 -	LMT	1884


			-3:30:52 StJohns N%sT	1918


			-3:30:52 Canada	N%sT	1919


			-3:30:52 StJohns N%sT	1935 Mar 30


			-3:30	StJohns	N%sT	1942 May 11


			-3:30	Canada	N%sT	1946


			-3:30	StJohns	N%sT	2011 Nov


			-3:30	Canada	N%sT





# most of east Labrador





# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'.


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Goose_Bay	-4:01:40 -	LMT	1884 # Happy Valley-Goose Bay


			-3:30:52 -	NST	1918


			-3:30:52 Canada N%sT	1919


			-3:30:52 -	NST	1935 Mar 30


			-3:30	-	NST	1936


			-3:30	StJohns	N%sT	1942 May 11


			-3:30	Canada	N%sT	1946


			-3:30	StJohns	N%sT	1966 Mar 15 2:00


			-4:00	StJohns	A%sT	2011 Nov


			-4:00	Canada	A%sT








# west Labrador, Nova Scotia, Prince Edward I





# From Paul Eggert (2006-03-22):


# Shanks & Pottenger write that since 1970 most of this region has been like


# Halifax.  Many locales did not observe peacetime DST until 1972;


# Glace Bay, NS is the largest that we know of.


# Shanks & Pottenger also write that Liverpool, NS was the only town


# in Canada to observe DST in 1971 but not 1970; for now we'll assume


# this is a typo.





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	Halifax	1916	only	-	Apr	 1	0:00	1:00	D


Rule	Halifax	1916	only	-	Oct	 1	0:00	0	S


Rule	Halifax	1920	only	-	May	 9	0:00	1:00	D


Rule	Halifax	1920	only	-	Aug	29	0:00	0	S


Rule	Halifax	1921	only	-	May	 6	0:00	1:00	D


Rule	Halifax	1921	1922	-	Sep	 5	0:00	0	S


Rule	Halifax	1922	only	-	Apr	30	0:00	1:00	D


Rule	Halifax	1923	1925	-	May	Sun>=1	0:00	1:00	D


Rule	Halifax	1923	only	-	Sep	 4	0:00	0	S


Rule	Halifax	1924	only	-	Sep	15	0:00	0	S


Rule	Halifax	1925	only	-	Sep	28	0:00	0	S


Rule	Halifax	1926	only	-	May	16	0:00	1:00	D


Rule	Halifax	1926	only	-	Sep	13	0:00	0	S


Rule	Halifax	1927	only	-	May	 1	0:00	1:00	D


Rule	Halifax	1927	only	-	Sep	26	0:00	0	S


Rule	Halifax	1928	1931	-	May	Sun>=8	0:00	1:00	D


Rule	Halifax	1928	only	-	Sep	 9	0:00	0	S


Rule	Halifax	1929	only	-	Sep	 3	0:00	0	S


Rule	Halifax	1930	only	-	Sep	15	0:00	0	S


Rule	Halifax	1931	1932	-	Sep	Mon>=24	0:00	0	S


Rule	Halifax	1932	only	-	May	 1	0:00	1:00	D


Rule	Halifax	1933	only	-	Apr	30	0:00	1:00	D


Rule	Halifax	1933	only	-	Oct	 2	0:00	0	S


Rule	Halifax	1934	only	-	May	20	0:00	1:00	D


Rule	Halifax	1934	only	-	Sep	16	0:00	0	S


Rule	Halifax	1935	only	-	Jun	 2	0:00	1:00	D


Rule	Halifax	1935	only	-	Sep	30	0:00	0	S


Rule	Halifax	1936	only	-	Jun	 1	0:00	1:00	D


Rule	Halifax	1936	only	-	Sep	14	0:00	0	S


Rule	Halifax	1937	1938	-	May	Sun>=1	0:00	1:00	D


Rule	Halifax	1937	1941	-	Sep	Mon>=24	0:00	0	S


Rule	Halifax	1939	only	-	May	28	0:00	1:00	D


Rule	Halifax	1940	1941	-	May	Sun>=1	0:00	1:00	D


Rule	Halifax	1946	1949	-	Apr	lastSun	2:00	1:00	D


Rule	Halifax	1946	1949	-	Sep	lastSun	2:00	0	S


Rule	Halifax	1951	1954	-	Apr	lastSun	2:00	1:00	D


Rule	Halifax	1951	1954	-	Sep	lastSun	2:00	0	S


Rule	Halifax	1956	1959	-	Apr	lastSun	2:00	1:00	D


Rule	Halifax	1956	1959	-	Sep	lastSun	2:00	0	S


Rule	Halifax	1962	1973	-	Apr	lastSun	2:00	1:00	D


Rule	Halifax	1962	1973	-	Oct	lastSun	2:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Halifax	-4:14:24 -	LMT	1902 Jun 15


			-4:00	Halifax	A%sT	1918


			-4:00	Canada	A%sT	1919


			-4:00	Halifax	A%sT	1942 Feb  9 2:00s


			-4:00	Canada	A%sT	1946


			-4:00	Halifax	A%sT	1974


			-4:00	Canada	A%sT


Zone America/Glace_Bay	-3:59:48 -	LMT	1902 Jun 15


			-4:00	Canada	A%sT	1953


			-4:00	Halifax	A%sT	1954


			-4:00	-	AST	1972


			-4:00	Halifax	A%sT	1974


			-4:00	Canada	A%sT





# New Brunswick





# From Paul Eggert (2007-01-31):


# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>


# says they changed at 00:01 through 2006, and


# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it


# clear that this was the case since at least 1993.


# For now, assume it started in 1993.





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	Moncton	1933	1935	-	Jun	Sun>=8	1:00	1:00	D


Rule	Moncton	1933	1935	-	Sep	Sun>=8	1:00	0	S


Rule	Moncton	1936	1938	-	Jun	Sun>=1	1:00	1:00	D


Rule	Moncton	1936	1938	-	Sep	Sun>=1	1:00	0	S


Rule	Moncton	1939	only	-	May	27	1:00	1:00	D


Rule	Moncton	1939	1941	-	Sep	Sat>=21	1:00	0	S


Rule	Moncton	1940	only	-	May	19	1:00	1:00	D


Rule	Moncton	1941	only	-	May	 4	1:00	1:00	D


Rule	Moncton	1946	1972	-	Apr	lastSun	2:00	1:00	D


Rule	Moncton	1946	1956	-	Sep	lastSun	2:00	0	S


Rule	Moncton	1957	1972	-	Oct	lastSun	2:00	0	S


Rule	Moncton	1993	2006	-	Apr	Sun>=1	0:01	1:00	D


Rule	Moncton	1993	2006	-	Oct	lastSun	0:01	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Moncton	-4:19:08 -	LMT	1883 Dec  9


			-5:00	-	EST	1902 Jun 15


			-4:00	Canada	A%sT	1933


			-4:00	Moncton	A%sT	1942


			-4:00	Canada	A%sT	1946


			-4:00	Moncton	A%sT	1973


			-4:00	Canada	A%sT	1993


			-4:00	Moncton	A%sT	2007


			-4:00	Canada	A%sT





# Quebec





# From Paul Eggert (2006-07-09):


# Shanks & Pottenger write that since 1970 most of Quebec has been


# like Montreal.





# From Paul Eggert (2006-06-27):


# Matthews and Vincent (1998) also write that Quebec east of the -63


# meridian is supposed to observe AST, but residents as far east as


# Natashquan use EST/EDT, and residents east of Natashquan use AST.


# In "Official time in Quebec" the Quebec department of justice writes in


# http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm


# that "The residents of the Municipality of the


# Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin,


# Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is


# written and use Atlantic standard time all year round. The same applies to


# the residents of the Native facilities along the lower North Shore."


# <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm>


# says this common practice was codified into law as of 2007.


# For lack of better info, guess this practice began around 1970, contra to


# Shanks & Pottenger who have this region observing AST/ADT.





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	Mont	1917	only	-	Mar	25	2:00	1:00	D


Rule	Mont	1917	only	-	Apr	24	0:00	0	S


Rule	Mont	1919	only	-	Mar	31	2:30	1:00	D


Rule	Mont	1919	only	-	Oct	25	2:30	0	S


Rule	Mont	1920	only	-	May	 2	2:30	1:00	D


Rule	Mont	1920	1922	-	Oct	Sun>=1	2:30	0	S


Rule	Mont	1921	only	-	May	 1	2:00	1:00	D


Rule	Mont	1922	only	-	Apr	30	2:00	1:00	D


Rule	Mont	1924	only	-	May	17	2:00	1:00	D


Rule	Mont	1924	1926	-	Sep	lastSun	2:30	0	S


Rule	Mont	1925	1926	-	May	Sun>=1	2:00	1:00	D


# The 1927-to-1937 rules can be expressed more simply as


# Rule	Mont	1927	1937	-	Apr	lastSat	24:00	1:00	D


# Rule	Mont	1927	1937	-	Sep	lastSat	24:00	0	S


# The rules below avoid use of 24:00


# (which pre-1998 versions of zic cannot handle).


Rule	Mont	1927	only	-	May	1	0:00	1:00	D


Rule	Mont	1927	1932	-	Sep	lastSun	0:00	0	S


Rule	Mont	1928	1931	-	Apr	lastSun	0:00	1:00	D


Rule	Mont	1932	only	-	May	1	0:00	1:00	D


Rule	Mont	1933	1940	-	Apr	lastSun	0:00	1:00	D


Rule	Mont	1933	only	-	Oct	1	0:00	0	S


Rule	Mont	1934	1939	-	Sep	lastSun	0:00	0	S


Rule	Mont	1946	1973	-	Apr	lastSun	2:00	1:00	D


Rule	Mont	1945	1948	-	Sep	lastSun	2:00	0	S


Rule	Mont	1949	1950	-	Oct	lastSun	2:00	0	S


Rule	Mont	1951	1956	-	Sep	lastSun	2:00	0	S


Rule	Mont	1957	1973	-	Oct	lastSun	2:00	0	S





# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Blanc-Sablon -3:48:28 -	LMT	1884


			-4:00	Canada	A%sT	1970


			-4:00	-	AST


Zone America/Montreal	-4:54:16 -	LMT	1884


			-5:00	Mont	E%sT	1918


			-5:00	Canada	E%sT	1919


			-5:00	Mont	E%sT	1942 Feb  9 2:00s


			-5:00	Canada	E%sT	1946


			-5:00	Mont	E%sT	1974


			-5:00	Canada	E%sT








# Ontario





# From Paul Eggert (2006-07-09):


# Shanks & Pottenger write that since 1970 most of Ontario has been like


# Toronto.


# Thunder Bay skipped DST in 1973.


# Many smaller locales did not observe peacetime DST until 1974;


# Nipigon (EST) and Rainy River (CST) are the largest that we know of.


# Far west Ontario is like Winnipeg; far east Quebec is like Halifax.





# From Mark Brader (2003-07-26):


# [According to the Toronto Star] Orillia, Ontario, adopted DST


# effective Saturday, 1912-06-22, 22:00; the article mentions that


# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw


# have already done so.  In Orillia DST was to run until Saturday,


# 1912-08-31 (no time mentioned), but it was met with considerable


# hostility from certain segments of the public, and was revoked after


# only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but


# presumably that should be -07-06.  (1912-06-19, -07-12; also letters


# earlier in June).


#


# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).





# From Paul Eggert (1997-10-17):


# Mark Brader writes that an article in the 1997-10-14 Toronto Star


# says that Atikokan, Ontario currently does not observe DST,


# but will vote on 11-10 whether to use EST/EDT.


# He also writes that the


# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html">


# Ontario Time Act (1990, Chapter T.9)


# </a>


# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.


# Officially Atikokan is therefore on CST/CDT, and most likely this report


# concerns a non-official time observed as a matter of local practice.


#


# From Paul Eggert (2000-10-02):


# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and


# New Osnaburgh observe CST all year, that Big Trout Lake observes


# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in


# violation of the official Ontario rules.


#


# From Paul Eggert (2006-07-09):


# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the


# 2005-07-21 Chronicle-Journal, which said:


#


#	The clocks in Atikokan stay set on standard time year-round.


#	This means they spend about half the time on central time and


#	the other half on eastern time.


#


#	For the most part, the system works, Mayor Dennis Brown said.


#


#	"The majority of businesses in Atikokan deal more with Eastern


#	Canada, but there are some that deal with Western Canada," he


#	said.  "I don't see any changes happening here."


#


# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang


# [New Osnaburgh] follow the same practice."





# From Garry McKinnon (2006-07-14) via Chris Walton:


# I chatted with a member of my board who has an outstanding memory


# and a long history in Atikokan (and in the telecom industry) and he


# can say for certain that Atikokan has been practicing the current


# time keeping since 1952, at least.





# From Paul Eggert (2006-07-17):


# Shanks & Pottenger say that Atikokan has agreed with Rainy River


# ever since standard time was introduced, but the information from


# McKinnon sounds more authoritative.  For now, assume that Atikokan


# switched to EST immediately after WWII era daylight saving time


# ended.  This matches the old (less-populous) America/Coral_Harbour


# entry since our cutoff date of 1970, so we can move


# America/Coral_Harbour to the 'backward' file.





# From Mark Brader (2010-03-06):


#


# Currently the database has:


#


# # Ontario


#


# # From Paul Eggert (2006-07-09):


# # Shanks & Pottenger write that since 1970 most of Ontario has been like


# # Toronto.


# # Thunder Bay skipped DST in 1973.


# # Many smaller locales did not observe peacetime DST until 1974;


# # Nipigon (EST) and Rainy River (CST) are the largest that we know of.


#


# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom


# right corner of page 1, it says that Toronto will return to standard


# time at 2 am Sunday morning (which agrees with the database), and that:


#


#     The one-hour setback will go into effect throughout most of Ontario,


#     except in areas like Windsor which remains on standard time all year.


#


# Windsor is, of course, a lot larger than Nipigon.


#


# I only came across this incidentally.  I don't know if Windsor began


# observing DST when Detroit did, or in 1974, or on some other date.


#


# By the way, the article continues by noting that:


#


#     Some cities in the United States have pushed the deadline back


#     three weeks and will change over from daylight saving in October.





# From Arthur David Olson (2010-07-17):


#


# "Standard Time and Time Zones in Canada" appeared in


# The Journal of The Royal Astronomical Society of Canada,


# volume 26, number 2 (February 1932) and, as of 2010-07-17,


# was available at


# <a href="http://adsabs.harvard.edu/full/1932JRASC..26...49S">


# http://adsabs.harvard.edu/full/1932JRASC..26...49S


# </a>


#


# It includes the text below (starting on page 57):


#


#   A list of the places in Canada using daylight saving time would


# require yearly revision. From information kindly furnished by


# the provincial governments and by the postmasters in many cities


# and towns, it is found that the following places used daylight sav-


# ing in 1930. The information for the province of Quebec is definite,


# for the other provinces only approximate:


#


# 	Province	Daylight saving time used


# Prince Edward Island	Not used.


# Nova Scotia		In Halifax only.


# New Brunswick		In St. John only.


# Quebec		In the following places:


# 			Montreal	Lachine


# 			Quebec		Mont-Royal


# 			Levis		Iberville


# 			St. Lambert	Cap de la Madeleine


# 			Verdun		Loretteville


# 			Westmount	Richmond


# 			Outremont	St. Jerome


# 			Longueuil	Greenfield Park


# 			Arvida		Waterloo


# 			Chambly-Canton	Beaulieu


# 			Melbourne	La Tuque


# 			St. Theophile	Buckingham


# Ontario		Used generally in the cities and towns along


# 			the southerly part of the province. Not


# 			used in the northwesterlhy part.


# Manitoba		Not used.


# Saskatchewan		In Regina only.


# Alberta		Not used.


# British Columbia	Not used.


#


#   With some exceptions, the use of daylight saving may be said to be limited


# to those cities and towns lying between Quebec city and Windsor, Ont.





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	Toronto	1919	only	-	Mar	30	23:30	1:00	D


Rule	Toronto	1919	only	-	Oct	26	0:00	0	S


Rule	Toronto	1920	only	-	May	 2	2:00	1:00	D


Rule	Toronto	1920	only	-	Sep	26	0:00	0	S


Rule	Toronto	1921	only	-	May	15	2:00	1:00	D


Rule	Toronto	1921	only	-	Sep	15	2:00	0	S


Rule	Toronto	1922	1923	-	May	Sun>=8	2:00	1:00	D


# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"


# was meant.


Rule	Toronto	1922	1926	-	Sep	Sun>=15	2:00	0	S


Rule	Toronto	1924	1927	-	May	Sun>=1	2:00	1:00	D


# The 1927-to-1939 rules can be expressed more simply as


# Rule	Toronto	1927	1937	-	Sep	Sun>=25	2:00	0	S


# Rule	Toronto	1928	1937	-	Apr	Sun>=25	2:00	1:00	D


# Rule	Toronto	1938	1940	-	Apr	lastSun	2:00	1:00	D


# Rule	Toronto	1938	1939	-	Sep	lastSun	2:00	0	S


# The rules below avoid use of Sun>=25


# (which pre-2004 versions of zic cannot handle).


Rule	Toronto	1927	1932	-	Sep	lastSun	2:00	0	S


Rule	Toronto	1928	1931	-	Apr	lastSun	2:00	1:00	D


Rule	Toronto	1932	only	-	May	1	2:00	1:00	D


Rule	Toronto	1933	1940	-	Apr	lastSun	2:00	1:00	D


Rule	Toronto	1933	only	-	Oct	1	2:00	0	S


Rule	Toronto	1934	1939	-	Sep	lastSun	2:00	0	S


Rule	Toronto	1945	1946	-	Sep	lastSun	2:00	0	S


Rule	Toronto	1946	only	-	Apr	lastSun	2:00	1:00	D


Rule	Toronto	1947	1949	-	Apr	lastSun	0:00	1:00	D


Rule	Toronto	1947	1948	-	Sep	lastSun	0:00	0	S


Rule	Toronto	1949	only	-	Nov	lastSun	0:00	0	S


Rule	Toronto	1950	1973	-	Apr	lastSun	2:00	1:00	D


Rule	Toronto	1950	only	-	Nov	lastSun	2:00	0	S


Rule	Toronto	1951	1956	-	Sep	lastSun	2:00	0	S


# Shanks & Pottenger say Toronto ended DST a week early in 1971,


# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this


# is wrong, and that he had confirmed it by checking the 1971-10-30


# Toronto Star, which said that DST was ending 1971-10-31 as usual.


Rule	Toronto	1957	1973	-	Oct	lastSun	2:00	0	S





# From Paul Eggert (2003-07-27):


# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and


# Port Arthur, Ontario, the principle of the Bill has been in


# operation for the past three years, and in the City of Moose Jaw,


# Saskatchewan, for one year."





# From David Bryan via Tory Tronrud, Director/Curator,


# Thunder Bay Museum (2003-11-12):


# There is some suggestion, however, that, by-law or not, daylight


# savings time was being practiced in Fort William and Port Arthur


# before 1909.... [I]n 1910, the line between the Eastern and Central


# Time Zones was permanently moved about two hundred miles west to


# include the Thunder Bay area....  When Canada adopted daylight


# savings time in 1916, Fort William and Port Arthur, having done so


# already, did not change their clocks....  During the Second World


# War,... [t]he cities agreed to implement DST during the summer


# months for the remainder of the war years.





# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Toronto	-5:17:32 -	LMT	1895


			-5:00	Canada	E%sT	1919


			-5:00	Toronto	E%sT	1942 Feb  9 2:00s


			-5:00	Canada	E%sT	1946


			-5:00	Toronto	E%sT	1974


			-5:00	Canada	E%sT


Zone America/Thunder_Bay -5:57:00 -	LMT	1895


			-6:00	-	CST	1910


			-5:00	-	EST	1942


			-5:00	Canada	E%sT	1970


			-5:00	Mont	E%sT	1973


			-5:00	-	EST	1974


			-5:00	Canada	E%sT


Zone America/Nipigon	-5:53:04 -	LMT	1895


			-5:00	Canada	E%sT	1940 Sep 29


			-5:00	1:00	EDT	1942 Feb  9 2:00s


			-5:00	Canada	E%sT


Zone America/Rainy_River -6:18:16 -	LMT	1895


			-6:00	Canada	C%sT	1940 Sep 29


			-6:00	1:00	CDT	1942 Feb  9 2:00s


			-6:00	Canada	C%sT


Zone America/Atikokan	-6:06:28 -	LMT	1895


			-6:00	Canada	C%sT	1940 Sep 29


			-6:00	1:00	CDT	1942 Feb  9 2:00s


			-6:00	Canada	C%sT	1945 Sep 30 2:00


			-5:00	-	EST








# Manitoba





# From Rob Douglas (2006-04-06):


# the old Manitoba Time Act - as amended by Bill 2, assented to


# March 27, 1987 ... said ...


# "between two o'clock Central Standard Time in the morning of


# the first Sunday of April of each year and two o'clock Central


# Standard Time in the morning of the last Sunday of October next


# following, one hour in advance of Central Standard Time."...


# I believe that the English legislation [of the old time act] had =


# been assented to (March 22, 1967)....


# Also, as far as I can tell, there was no order-in-council varying


# the time of Daylight Saving Time for 2005 and so the provisions of


# the 1987 version would apply - the changeover was at 2:00 Central


# Standard Time (i.e. not until 3:00 Central Daylight Time).





# From Paul Eggert (2006-04-10):


# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s)


# starting 1966.  Since 02:00s is clearly correct for 1967 on, assume


# it was also 02:00s in 1966.





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	Winn	1916	only	-	Apr	23	0:00	1:00	D


Rule	Winn	1916	only	-	Sep	17	0:00	0	S


Rule	Winn	1918	only	-	Apr	14	2:00	1:00	D


Rule	Winn	1918	only	-	Oct	27	2:00	0	S


Rule	Winn	1937	only	-	May	16	2:00	1:00	D


Rule	Winn	1937	only	-	Sep	26	2:00	0	S


Rule	Winn	1942	only	-	Feb	 9	2:00	1:00	W # War


Rule	Winn	1945	only	-	Aug	14	23:00u	1:00	P # Peace


Rule	Winn	1945	only	-	Sep	lastSun	2:00	0	S


Rule	Winn	1946	only	-	May	12	2:00	1:00	D


Rule	Winn	1946	only	-	Oct	13	2:00	0	S


Rule	Winn	1947	1949	-	Apr	lastSun	2:00	1:00	D


Rule	Winn	1947	1949	-	Sep	lastSun	2:00	0	S


Rule	Winn	1950	only	-	May	 1	2:00	1:00	D


Rule	Winn	1950	only	-	Sep	30	2:00	0	S


Rule	Winn	1951	1960	-	Apr	lastSun	2:00	1:00	D


Rule	Winn	1951	1958	-	Sep	lastSun	2:00	0	S


Rule	Winn	1959	only	-	Oct	lastSun	2:00	0	S


Rule	Winn	1960	only	-	Sep	lastSun	2:00	0	S


Rule	Winn	1963	only	-	Apr	lastSun	2:00	1:00	D


Rule	Winn	1963	only	-	Sep	22	2:00	0	S


Rule	Winn	1966	1986	-	Apr	lastSun	2:00s	1:00	D


Rule	Winn	1966	2005	-	Oct	lastSun	2:00s	0	S


Rule	Winn	1987	2005	-	Apr	Sun>=1	2:00s	1:00	D


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Winnipeg	-6:28:36 -	LMT	1887 Jul 16


			-6:00	Winn	C%sT	2006


			-6:00	Canada	C%sT








# Saskatchewan





# From Mark Brader (2003-07-26):


# The first actual adoption of DST in Canada was at the municipal


# level.  As the [Toronto] Star put it (1912-06-07), "While people


# elsewhere have long been talking of legislation to save daylight,


# the city of Moose Jaw [Saskatchewan] has acted on its own hook."


# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:


# presumably late evening, as below), and would run until "the end of


# the summer".  The discrepancy between municipal time and railroad


# time was noted.





# From Paul Eggert (2003-07-27):


# Willett (1914-03) notes that DST "has been in operation ... in the


# City of Moose Jaw, Saskatchewan, for one year."





# From Paul Eggert (2006-03-22):


# Shanks & Pottenger say that since 1970 this region has mostly been as Regina.


# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.


# Other western towns (e.g. Lloydminster) are like Edmonton.


# Matthews and Vincent (1998) write that Denare Beach and Creighton


# are like Winnipeg, in violation of Saskatchewan law.





# From W. Jones (1992-11-06):


# The. . .below is based on information I got from our law library, the


# provincial archives, and the provincial Community Services department.


# A precise history would require digging through newspaper archives, and


# since you didn't say what you wanted, I didn't bother.


#


# Saskatchewan is split by a time zone meridian (105W) and over the years


# the boundary became pretty ragged as communities near it reevaluated


# their affiliations in one direction or the other.  In 1965 a provincial


# referendum favoured legislating common time practices.


#


# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of


# Saskatchewan 1978) was proclaimed, and established that the eastern


# part of Saskatchewan would use CST year round, that districts in


# northwest Saskatchewan would by default follow CST but could opt to


# follow Mountain Time rules (thus 1 hour difference in the winter and


# zero in the summer), and that districts in southwest Saskatchewan would


# by default follow MT but could opt to follow CST.


#


# It took a few years for the dust to settle (I know one story of a town


# on one time zone having its school in another, such that a mom had to


# serve her family lunch in two shifts), but presently it seems that only


# a few towns on the border with Alberta (e.g. Lloydminster) follow MT


# rules any more; all other districts appear to have used CST year round


# since sometime in the 1960s.





# From Chris Walton (2006-06-26):


# The Saskatchewan time act which was last updated in 1996 is about 30 pages


# long and rather painful to read.


# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	Regina	1918	only	-	Apr	14	2:00	1:00	D


Rule	Regina	1918	only	-	Oct	27	2:00	0	S


Rule	Regina	1930	1934	-	May	Sun>=1	0:00	1:00	D


Rule	Regina	1930	1934	-	Oct	Sun>=1	0:00	0	S


Rule	Regina	1937	1941	-	Apr	Sun>=8	0:00	1:00	D


Rule	Regina	1937	only	-	Oct	Sun>=8	0:00	0	S


Rule	Regina	1938	only	-	Oct	Sun>=1	0:00	0	S


Rule	Regina	1939	1941	-	Oct	Sun>=8	0:00	0	S


Rule	Regina	1942	only	-	Feb	 9	2:00	1:00	W # War


Rule	Regina	1945	only	-	Aug	14	23:00u	1:00	P # Peace


Rule	Regina	1945	only	-	Sep	lastSun	2:00	0	S


Rule	Regina	1946	only	-	Apr	Sun>=8	2:00	1:00	D


Rule	Regina	1946	only	-	Oct	Sun>=8	2:00	0	S


Rule	Regina	1947	1957	-	Apr	lastSun	2:00	1:00	D


Rule	Regina	1947	1957	-	Sep	lastSun	2:00	0	S


Rule	Regina	1959	only	-	Apr	lastSun	2:00	1:00	D


Rule	Regina	1959	only	-	Oct	lastSun	2:00	0	S


#


Rule	Swift	1957	only	-	Apr	lastSun	2:00	1:00	D


Rule	Swift	1957	only	-	Oct	lastSun	2:00	0	S


Rule	Swift	1959	1961	-	Apr	lastSun	2:00	1:00	D


Rule	Swift	1959	only	-	Oct	lastSun	2:00	0	S


Rule	Swift	1960	1961	-	Sep	lastSun	2:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Regina	-6:58:36 -	LMT	1905 Sep


			-7:00	Regina	M%sT	1960 Apr lastSun 2:00


			-6:00	-	CST


Zone America/Swift_Current -7:11:20 -	LMT	1905 Sep


			-7:00	Canada	M%sT	1946 Apr lastSun 2:00


			-7:00	Regina	M%sT	1950


			-7:00	Swift	M%sT	1972 Apr lastSun 2:00


			-6:00	-	CST








# Alberta





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	Edm	1918	1919	-	Apr	Sun>=8	2:00	1:00	D


Rule	Edm	1918	only	-	Oct	27	2:00	0	S


Rule	Edm	1919	only	-	May	27	2:00	0	S


Rule	Edm	1920	1923	-	Apr	lastSun	2:00	1:00	D


Rule	Edm	1920	only	-	Oct	lastSun	2:00	0	S


Rule	Edm	1921	1923	-	Sep	lastSun	2:00	0	S


Rule	Edm	1942	only	-	Feb	 9	2:00	1:00	W # War


Rule	Edm	1945	only	-	Aug	14	23:00u	1:00	P # Peace


Rule	Edm	1945	only	-	Sep	lastSun	2:00	0	S


Rule	Edm	1947	only	-	Apr	lastSun	2:00	1:00	D


Rule	Edm	1947	only	-	Sep	lastSun	2:00	0	S


Rule	Edm	1967	only	-	Apr	lastSun	2:00	1:00	D


Rule	Edm	1967	only	-	Oct	lastSun	2:00	0	S


Rule	Edm	1969	only	-	Apr	lastSun	2:00	1:00	D


Rule	Edm	1969	only	-	Oct	lastSun	2:00	0	S


Rule	Edm	1972	1986	-	Apr	lastSun	2:00	1:00	D


Rule	Edm	1972	2006	-	Oct	lastSun	2:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Edmonton	-7:33:52 -	LMT	1906 Sep


			-7:00	Edm	M%sT	1987


			-7:00	Canada	M%sT








# British Columbia





# From Paul Eggert (2006-03-22):


# Shanks & Pottenger write that since 1970 most of this region has


# been like Vancouver.


# Dawson Creek uses MST.  Much of east BC is like Edmonton.


# Matthews and Vincent (1998) write that Creston is like Dawson Creek.





# It seems though that (re: Creston) is not entirely correct:





# From Chris Walton (2011-12-01):


# There are two areas within the Canadian province of British Columbia


# that do not currently observe daylight saving:


# a) The Creston Valley (includes the town of Creston and surrounding area)


# b) The eastern half of the Peace River Regional District


# (includes the cities of Dawson Creek and Fort St. John)





# Earlier this year I stumbled across a detailed article about the time


# keeping history of Creston; it was written by Tammy Hardwick who is the


# manager of the Creston & District Museum. The article was written in May 2009.


# <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260">


# http://www.ilovecreston.com/?p=articles&t=spec&ar=260


# </a>


# According to the article, Creston has not changed its clocks since June 1918.


# i.e. Creston has been stuck on UTC-7 for 93 years.


# Dawson Creek, on the other hand, changed its clocks as recently as April 1972.





# Unfortunately the exact date for the time change in June 1918 remains


# unknown and will be difficult to ascertain.  I e-mailed Tammy a few months


# ago to ask if Sunday June 2 was a reasonable guess.  She said it was just


# as plausible as any other date (in June).  She also said that after writing the


# article she had discovered another time change in 1916; this is the subject


# of another article which she wrote in October 2010.


# <a href="http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56">


# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56


# </a>





# Here is a summary of the three clock change events in Creston's history:


# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7)


# Exact date unknown


# 2. Oct 1916: switch to Pacific Standard Time (GMT-8)


# Exact date in October unknown;  Sunday October 1 is a reasonable guess.


# 3. June 1918: switch to Pacific Daylight Time (GMT-7)


# Exact date in June unknown; Sunday June 2 is a reasonable guess.


# note#1:


# On Oct 27/1918 when daylight saving ended in the rest of Canada,


# Creston did not change its clocks.


# note#2:


# During WWII when the Federal Government legislated a mandatory clock change,


# Creston did not oblige.


# note#3:


# There is no guarantee that Creston will remain on Mountain Standard Time


# (UTC-7) forever.


# The subject was debated at least once this year by the town Council.


# <a href="http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html">


# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html


# </a>





# During a period WWII, summer time (Daylight saying) was mandatory in Canada.


# In Creston, that was handled by shifting the area to PST (-8:00) then applying


# summer time to cause the offset to be -7:00, the same as it had been before


# the change.  It can be argued that the timezone abbreviation during this


# period should be PDT rather than MST, but that doesn't seem important enough


# (to anyone) to further complicate the rules.





# The transition dates (and times) are guesses.





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	Vanc	1918	only	-	Apr	14	2:00	1:00	D


Rule	Vanc	1918	only	-	Oct	27	2:00	0	S


Rule	Vanc	1942	only	-	Feb	 9	2:00	1:00	W # War


Rule	Vanc	1945	only	-	Aug	14	23:00u	1:00	P # Peace


Rule	Vanc	1945	only	-	Sep	30	2:00	0	S


Rule	Vanc	1946	1986	-	Apr	lastSun	2:00	1:00	D


Rule	Vanc	1946	only	-	Oct	13	2:00	0	S


Rule	Vanc	1947	1961	-	Sep	lastSun	2:00	0	S


Rule	Vanc	1962	2006	-	Oct	lastSun	2:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Vancouver	-8:12:28 -	LMT	1884


			-8:00	Vanc	P%sT	1987


			-8:00	Canada	P%sT


Zone America/Dawson_Creek -8:00:56 -	LMT	1884


			-8:00	Canada	P%sT	1947


			-8:00	Vanc	P%sT	1972 Aug 30 2:00


			-7:00	-	MST


Zone America/Creston	-7:46:04 -	LMT	1884


			-7:00	-	MST	1916 Oct 1


			-8:00	-	PST	1918 Jun 2


			-7:00	-	MST





# Northwest Territories, Nunavut, Yukon





# From Paul Eggert (2006-03-22):


# Dawson switched to PST in 1973.  Inuvik switched to MST in 1979.


# Mathew Englander (1996-10-07) gives the following refs:


#	* 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,


#	c. 7 defines Yukon standard time as UTC-9.  This is still valid;


#	see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).


#	* C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.


#	* O.I.C. 1980/02 established DST.


#	* O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.


# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go


# with Englander.


# From Chris Walton (2006-06-26):


# Here is a link to the old daylight saving portion of the interpretation


# act which was last updated in 1987:


# http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf





# From Rives McDow (1999-09-04):


# Nunavut ... moved ... to incorporate the whole territory into one time zone.


# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html">


# Nunavut moves to single time zone Oct. 31


# </a>


#


# From Antoine Leca (1999-09-06):


# We then need to create a new timezone for the Kitikmeot region of Nunavut


# to differentiate it from the Yellowknife region.





# From Paul Eggert (1999-09-20):


# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html">


# Basic Facts: The New Territory


# </a> (1999) reports that Pangnirtung operates on eastern time,


# and that Coral Harbour does not observe DST.  We don't know when


# Pangnirtung switched to eastern time; we'll guess 1995.





# From Rives McDow (1999-11-08):


# On October 31, when the rest of Nunavut went to Central time,


# Pangnirtung wobbled.  Here is the result of their wobble:


#


# The following businesses and organizations in Pangnirtung use Central Time:


#


#	First Air, Power Corp, Nunavut Construction, Health Center, RCMP,


#	Eastern Arctic National Parks, A & D Specialist


#


# The following businesses and organizations in Pangnirtung use Eastern Time:


#


#	Hamlet office, All other businesses, Both schools, Airport operator


#


# This has made for an interesting situation there, which warranted the news.


# No one there that I spoke with seems concerned, or has plans to


# change the local methods of keeping time, as it evidently does not


# really interfere with any activities or make things difficult locally.


# They plan to celebrate New Year's turn-over twice, one hour apart,


# so it appears that the situation will last at least that long.


# The Nunavut Intergovernmental Affairs hopes that they will "come to


# their senses", but the locals evidently don't see any problem with


# the current state of affairs.





# From Michaela Rodrigue, writing in the


# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html">


# Nunatsiaq News (1999-11-19)</a>:


# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones,


# central - or Nunavut time - for government offices, and eastern time


# for municipal offices and schools....  Igloolik [was similar but then]


# made the switch to central time on Saturday, Nov. 6.





# From Paul Eggert (2000-10-02):


# Matthews and Vincent (1998) say the following, but we lack histories


# for these potential new Zones.


#


# The Canadian Forces station at Alert uses Eastern Time while the


# handful of residents at the Eureka weather station [in the Central


# zone] skip daylight savings.  Baffin Island, which is crossed by the


# Central, Eastern and Atlantic Time zones only uses Eastern Time.


# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of


# Central Time and Southampton Island [in the Central zone] is not


# required to use daylight savings.





# From


# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html">


# Nunavut now has two time zones


# </a> (2000-11-10):


# The Nunavut government would allow its employees in Kugluktuk and


# Cambridge Bay to operate on central time year-round, putting them


# one hour behind the rest of Nunavut for six months during the winter.


# At the end of October the two communities had rebelled against


# Nunavut's unified time zone, refusing to shift to eastern time with


# the rest of the territory for the winter.  Cambridge Bay remained on


# central time, while Kugluktuk, even farther west, reverted to


# mountain time, which they had used before the advent of Nunavut's


# unified time zone in 1999.


#


# From Rives McDow (2001-01-20), quoting the Nunavut government:


# The preceding decision came into effect at midnight, Saturday Nov 4, 2000.





# From Paul Eggert (2000-12-04):


# Let's just keep track of the official times for now.





# From Rives McDow (2001-03-07):


# The premier of Nunavut has issued a ministerial statement advising


# that effective 2001-04-01, the territory of Nunavut will revert


# back to three time zones (mountain, central, and eastern).  Of the


# cities in Nunavut, Coral Harbor is the only one that I know of that


# has said it will not observe dst, staying on EST year round.  I'm


# checking for more info, and will get back to you if I come up with


# more.


# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]





# From Gwillim Law (2005-05-21):


# According to maps at


# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg


# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg


# (both dated 2003), and


# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp


# (from a 1998 Canadian Geographic article), the de facto and de jure time


# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year


# round.  Using Google, it's easy to find other websites that confirm this.


# I wasn't able to find how far back this time regimen goes, but since it


# predates the creation of Nunavut, it probably goes back many years....


# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used.


#


# From Paul Eggert (2005-07-26):


# For lack of better information, assume that Southampton Island observed


# daylight saving only during wartime.





# From Chris Walton (2007-03-01):


# ... the community of Resolute (located on Cornwallis Island in


# Nunavut) moved from Central Time to Eastern Time last November.


# Basically the community did not change its clocks at the end of


# daylight saving....


# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html





# From Chris Walton (2011-03-21):


# Back in 2007 I initiated the creation of a new "zone file" for Resolute


# Bay. Resolute Bay is a small community located about 900km north of


# the Arctic Circle. The zone file was required because Resolute Bay had


# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007.


#


# According to new information which I received last week, Resolute Bay


# went back to using UTC-6 in the winter of 2007-2008...


#


# On March 11/2007 most of Canada went onto daylight saving. On March


# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I


# talked to somebody that was both knowledgeable and helpful. I was able


# to confirm that Resolute Bay was still operating on UTC-5. It was


# explained to me that Resolute Bay had been on the Eastern Time zone


# (EST) in the winter, and was now back on the Central Time zone (CDT).


# i.e. the time zone had changed twice in the last year but the clocks


# had not moved. The residents had to know which time zone they were in


# so they could follow the correct TV schedule...


#


# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I


# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature


# of the phone call, I decided to seek out an alternate source of


# information. I found an e-mail address for somebody by the name of


# Stephanie Adams whose job was listed as "Inns North Support Officer for


# Arctic Co-operatives." I was under the impression that Stephanie lived


# and worked in Resolute Bay...


#


# On March 14/2011 I phoned the hamlet office again. I was told that


# Resolute Bay had been using Central Standard Time over the winter of


# 2010-2011 and that the clocks had therefore been moved one hour ahead


# on March 13/2011. The person I talked to was aware that Resolute Bay


# had previously experimented with Eastern Standard Time but he could not


# tell me when the practice had stopped.


#


# On March 17/2011 I searched the Web to find an e-mail address of


# somebody that might be able to tell me exactly when Resolute Bay went


# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz


# used to be the mayor of Resolute Bay and he apparently owns half the


# businesses including "South Camp Inn." This website has some info on


# Aziz:


# <a href="http://www.uphere.ca/node/493">


# http://www.uphere.ca/node/493


# </a>


#


# I sent Aziz an e-mail asking when Resolute Bay had stopped using


# Eastern Standard Time.


#


# Aziz responded quickly with this: "hi, The time was not changed for the


# 1 year only, the following year, the community went back to the old way


# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in


# the winter Zulu plus 6 hrs"


#


# This of course conflicted with everything I had ascertained in November 2008.


#


# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz


# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You


# may want to check with the weather office in Resolute Bay or do a


# search on the weather through Env. Canada. web site"


#


# If I had realized the Stephanie did not live in Resolute Bay I would


# never have contacted her.  I now believe that all the information I


# obtained in November 2008 should be ignored...


# I apologize for reporting incorrect information in 2008.





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	NT_YK	1918	only	-	Apr	14	2:00	1:00	D


Rule	NT_YK	1918	only	-	Oct	27	2:00	0	S


Rule	NT_YK	1919	only	-	May	25	2:00	1:00	D


Rule	NT_YK	1919	only	-	Nov	 1	0:00	0	S


Rule	NT_YK	1942	only	-	Feb	 9	2:00	1:00	W # War


Rule	NT_YK	1945	only	-	Aug	14	23:00u	1:00	P # Peace


Rule	NT_YK	1945	only	-	Sep	30	2:00	0	S


Rule	NT_YK	1965	only	-	Apr	lastSun	0:00	2:00	DD


Rule	NT_YK	1965	only	-	Oct	lastSun	2:00	0	S


Rule	NT_YK	1980	1986	-	Apr	lastSun	2:00	1:00	D


Rule	NT_YK	1980	2006	-	Oct	lastSun	2:00	0	S


Rule	NT_YK	1987	2006	-	Apr	Sun>=1	2:00	1:00	D


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


# aka Panniqtuuq


Zone America/Pangnirtung 0	-	zzz	1921 # trading post est.


			-4:00	NT_YK	A%sT	1995 Apr Sun>=1 2:00


			-5:00	Canada	E%sT	1999 Oct 31 2:00


			-6:00	Canada	C%sT	2000 Oct 29 2:00


			-5:00	Canada	E%sT


# formerly Frobisher Bay


Zone America/Iqaluit	0	-	zzz	1942 Aug # Frobisher Bay est.


			-5:00	NT_YK	E%sT	1999 Oct 31 2:00


			-6:00	Canada	C%sT	2000 Oct 29 2:00


			-5:00	Canada	E%sT


# aka Qausuittuq


Zone America/Resolute	0	-	zzz	1947 Aug 31 # Resolute founded


			-6:00	NT_YK	C%sT	2000 Oct 29 2:00


			-5:00	-	EST	2001 Apr  1 3:00


			-6:00	Canada	C%sT	2006 Oct 29 2:00


			-5:00	-	EST	2007 Mar 11 3:00


			-6:00	Canada	C%sT


# aka Kangiqiniq


Zone America/Rankin_Inlet 0	-	zzz	1957 # Rankin Inlet founded


			-6:00	NT_YK	C%sT	2000 Oct 29 2:00


			-5:00	-	EST	2001 Apr  1 3:00


			-6:00	Canada	C%sT


# aka Iqaluktuuttiaq


Zone America/Cambridge_Bay 0	-	zzz	1920 # trading post est.?


			-7:00	NT_YK	M%sT	1999 Oct 31 2:00


			-6:00	Canada	C%sT	2000 Oct 29 2:00


			-5:00	-	EST	2000 Nov  5 0:00


			-6:00	-	CST	2001 Apr  1 3:00


			-7:00	Canada	M%sT


Zone America/Yellowknife 0	-	zzz	1935 # Yellowknife founded?


			-7:00	NT_YK	M%sT	1980


			-7:00	Canada	M%sT


Zone America/Inuvik	0	-	zzz	1953 # Inuvik founded


			-8:00	NT_YK	P%sT	1979 Apr lastSun 2:00


			-7:00	NT_YK	M%sT	1980


			-7:00	Canada	M%sT


Zone America/Whitehorse	-9:00:12 -	LMT	1900 Aug 20


			-9:00	NT_YK	Y%sT	1966 Jul 1 2:00


			-8:00	NT_YK	P%sT	1980


			-8:00	Canada	P%sT


Zone America/Dawson	-9:17:40 -	LMT	1900 Aug 20


			-9:00	NT_YK	Y%sT	1973 Oct 28 0:00


			-8:00	NT_YK	P%sT	1980


			-8:00	Canada	P%sT








###############################################################################





# Mexico





# From Paul Eggert (2001-03-05):


# The Investigation and Analysis Service of the


# Mexican Library of Congress (MLoC) has published a


# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/">


# history of Mexican local time (in Spanish)


# </a>.


#


# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC.


# (In all cases we go with the MLoC.)


# S&P report that Baja was at -8:00 in 1922/1923.


# S&P say the 1930 transition in Baja was 1930-11-16.


# S&P report no DST during summer 1931.


# S&P report a transition at 1932-03-30 23:00, not 1932-04-01.





# From Gwillim Law (2001-02-20):


# There are some other discrepancies between the Decrees page and the


# tz database.  I think they can best be explained by supposing that


# the researchers who prepared the Decrees page failed to find some of


# the relevant documents.





# From Alan Perry (1996-02-15):


# A guy from our Mexico subsidiary finally found the Presidential Decree


# outlining the timezone changes in Mexico.


#


# ------------- Begin Forwarded Message -------------


#


# I finally got my hands on the Official Presidential Decree that sets up the


# rules for the DST changes. The rules are:


#


# 1. The country is divided in 3 timezones:


#    - Baja California Norte (the Mexico/BajaNorte TZ)


#    - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)


#    - The rest of the country (the Mexico/General TZ)


#


# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October


#    at 2:00 AM, the times in each zone are as follows:


#    BajaNorte: GMT+7


#    BajaSur:   GMT+6


#    General:   GMT+5


#


# 3. The rest of the year, the times are as follows:


#    BajaNorte: GMT+8


#    BajaSur:   GMT+7


#    General:   GMT+6


#


# The Decree was published in Mexico's Official Newspaper on January 4th.


#


# -------------- End Forwarded Message --------------


# From Paul Eggert (1996-06-12):


# For an English translation of the decree, see


# <a href="http://mexico-travel.com/extra/timezone_eng.html">


# ``Diario Oficial: Time Zone Changeover'' (1996-01-04).


# </a>





# From Rives McDow (1998-10-08):


# The State of Quintana Roo has reverted back to central STD and DST times


# (i.e. UTC -0600 and -0500 as of 1998-08-02).





# From Rives McDow (2000-01-10):


# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time


# zone 5 hours from the International Date Line, and will not observe daylight


# savings time so as to stay on the same time zone as the southern part of


# Arizona year round.





# From Jesper Norgaard, translating


# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):


# In Oaxaca, the 55.000 teachers from the Section 22 of the National


# Syndicate of Education Workers, refuse to apply daylight saving each


# year, so that the more than 10,000 schools work at normal hour the


# whole year.





# From Gwillim Law (2001-01-19):


# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says


# (translated):...


# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced


# that Summer Time will be reduced from seven to five months, starting


# this year....


# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001>


# [translated], says "summer time will ... take effect on the first Sunday


# in May, and end on the last Sunday of September.





# From Arthur David Olson (2001-01-25):


# The 2001-01-24 traditional Washington Post contained the page one


# story "Timely Issue Divides Mexicans."...


# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html


# ... Mexico City Mayor Lopez Obrador "...is threatening to keep


# Mexico City and its 20 million residents on a different time than


# the rest of the country..." In particular, Lopez Obrador would abolish


# observation of Daylight Saving Time.





# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre">


# Official statute published by the Energy Department


# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules,


# and Sonora with no DST.  This was reported by Jesper Norgaard (2001-02-03).





# From Paul Eggert (2001-03-03):


#


# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html">


# James F. Smith writes in today's LA Times


# </a>


# * Sonora will continue to observe standard time.


# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that


#   the Federal District will not adopt DST.


# * 4 of 16 district leaders announced they'll ignore the decree.


# * The decree does not affect federal-controlled facilities including


#   the airport, banks, hospitals, and schools.


#


# For now we'll assume that the Federal District will bow to federal rules.





# From Jesper Norgaard (2001-04-01):


# I found some references to the Mexican application of daylight


# saving, which modifies what I had already sent you, stating earlier


# that a number of northern Mexican states would go on daylight


# saving. The modification reverts this to only cover Baja California


# (Norte), while all other states (except Sonora, who has no daylight


# saving all year) will follow the original decree of president


# Vicente Fox, starting daylight saving May 6, 2001 and ending


# September 30, 2001.


# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp>


# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)





# From Reuters (2001-09-04):


# Mexico's Supreme Court on Tuesday declared that daylight savings was


# unconstitutional in Mexico City, creating the possibility the


# capital will be in a different time zone from the rest of the nation


# next year....  The Supreme Court's ruling takes effect at 2:00


# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to


# standard time. "This is so residents of the Federal District are not


# subject to unexpected time changes," a statement from the court said.





# From Jesper Norgaard Welen (2002-03-12):


# ... consulting my local grocery store(!) and my coworkers, they all insisted


# that a new decision had been made to reinstate US style DST in Mexico....


# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20)


# confirms this.  Sonora as usual is the only state where DST is not applied.





# From Steffen Thorsen (2009-12-28):


#


# Steffen Thorsen wrote:


# > Mexico's House of Representatives has approved a proposal for northern


# > Mexico's border cities to share the same daylight saving schedule as


# > the United States.


# Now this has passed both the Congress and the Senate, so starting from


# 2010, some border regions will be the same:


# <a href="http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/">


# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/


# </a>


# <a href="http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939">


# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939


# </a>


# (Spanish)


#


# Could not find the new law text, but the proposed law text changes are here:


# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf">


# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf


# </a>


# (Gaceta Parlamentaria)


#


# There is also a list of the votes here:


# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html">


# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html


# </a>


#


# Our page:


# <a href="http://www.timeanddate.com/news/time/north-mexico-dst-change.html">


# http://www.timeanddate.com/news/time/north-mexico-dst-change.html


# </a>





# From Arthur David Olson (2010-01-20):


# The page


# <a href="http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010">


# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010


# </a>


# includes this text:


# En los municipios fronterizos de Tijuana y Mexicali en Baja California;


# Ju&aacute;rez y Ojinaga en Chihuahua; Acu&ntilde;a y Piedras Negras en Coahuila;


# An&aacute;huac en Nuevo Le&oacute;n; y Nuevo Laredo, Reynosa y Matamoros en


# Tamaulipas, la aplicaci&oacute;n de este horario estacional surtir&aacute; efecto


# desde las dos horas del segundo domingo de marzo y concluir&aacute; a las dos


# horas del primer domingo de noviembre.


# En los municipios fronterizos que se encuentren ubicados en la franja


# fronteriza norte en el territorio comprendido entre la l&iacute;nea


# internacional y la l&iacute;nea paralela ubicada a una distancia de veinte


# kil&oacute;metros, as&iacute; como la Ciudad de Ensenada, Baja California, hacia el


# interior del pa&iacute;s, la aplicaci&oacute;n de este horario estacional surtir&aacute;


# efecto desde las dos horas del segundo domingo de marzo y concluir&aacute; a


# las dos horas del primer domingo de noviembre.





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	Mexico	1939	only	-	Feb	5	0:00	1:00	D


Rule	Mexico	1939	only	-	Jun	25	0:00	0	S


Rule	Mexico	1940	only	-	Dec	9	0:00	1:00	D


Rule	Mexico	1941	only	-	Apr	1	0:00	0	S


Rule	Mexico	1943	only	-	Dec	16	0:00	1:00	W # War


Rule	Mexico	1944	only	-	May	1	0:00	0	S


Rule	Mexico	1950	only	-	Feb	12	0:00	1:00	D


Rule	Mexico	1950	only	-	Jul	30	0:00	0	S


Rule	Mexico	1996	2000	-	Apr	Sun>=1	2:00	1:00	D


Rule	Mexico	1996	2000	-	Oct	lastSun	2:00	0	S


Rule	Mexico	2001	only	-	May	Sun>=1	2:00	1:00	D


Rule	Mexico	2001	only	-	Sep	lastSun	2:00	0	S


Rule	Mexico	2002	max	-	Apr	Sun>=1	2:00	1:00	D


Rule	Mexico	2002	max	-	Oct	lastSun	2:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


# Quintana Roo


Zone America/Cancun	-5:47:04 -	LMT	1922 Jan  1  0:12:56


			-6:00	-	CST	1981 Dec 23


			-5:00	Mexico	E%sT	1998 Aug  2  2:00


			-6:00	Mexico	C%sT


# Campeche, Yucatan


Zone America/Merida	-5:58:28 -	LMT	1922 Jan  1  0:01:32


			-6:00	-	CST	1981 Dec 23


			-5:00	-	EST	1982 Dec  2


			-6:00	Mexico	C%sT


# Coahuila, Durango, Nuevo Leon, Tamaulipas (near US border)


Zone America/Matamoros	-6:40:00 -	LMT	1921 Dec 31 23:20:00


			-6:00	-	CST	1988


			-6:00	US	C%sT	1989


			-6:00	Mexico	C%sT	2010


			-6:00	US	C%sT


# Coahuila, Durango, Nuevo Leon, Tamaulipas (away from US border)


Zone America/Monterrey	-6:41:16 -	LMT	1921 Dec 31 23:18:44


			-6:00	-	CST	1988


			-6:00	US	C%sT	1989


			-6:00	Mexico	C%sT


# Central Mexico


Zone America/Mexico_City -6:36:36 -	LMT	1922 Jan  1 0:23:24


			-7:00	-	MST	1927 Jun 10 23:00


			-6:00	-	CST	1930 Nov 15


			-7:00	-	MST	1931 May  1 23:00


			-6:00	-	CST	1931 Oct


			-7:00	-	MST	1932 Apr  1


			-6:00	Mexico	C%sT	2001 Sep 30 02:00


			-6:00	-	CST	2002 Feb 20


			-6:00	Mexico	C%sT


# Chihuahua (near US border)


Zone America/Ojinaga	-6:57:40 -	LMT	1922 Jan 1 0:02:20


			-7:00	-	MST	1927 Jun 10 23:00


			-6:00	-	CST	1930 Nov 15


			-7:00	-	MST	1931 May  1 23:00


			-6:00	-	CST	1931 Oct


			-7:00	-	MST	1932 Apr  1


			-6:00	-	CST	1996


			-6:00	Mexico	C%sT	1998


			-6:00	-	CST	1998 Apr Sun>=1 3:00


			-7:00	Mexico	M%sT	2010


			-7:00	US	M%sT


# Chihuahua (away from US border)


Zone America/Chihuahua	-7:04:20 -	LMT	1921 Dec 31 23:55:40


			-7:00	-	MST	1927 Jun 10 23:00


			-6:00	-	CST	1930 Nov 15


			-7:00	-	MST	1931 May  1 23:00


			-6:00	-	CST	1931 Oct


			-7:00	-	MST	1932 Apr  1


			-6:00	-	CST	1996


			-6:00	Mexico	C%sT	1998


			-6:00	-	CST	1998 Apr Sun>=1 3:00


			-7:00	Mexico	M%sT


# Sonora


Zone America/Hermosillo	-7:23:52 -	LMT	1921 Dec 31 23:36:08


			-7:00	-	MST	1927 Jun 10 23:00


			-6:00	-	CST	1930 Nov 15


			-7:00	-	MST	1931 May  1 23:00


			-6:00	-	CST	1931 Oct


			-7:00	-	MST	1932 Apr  1


			-6:00	-	CST	1942 Apr 24


			-7:00	-	MST	1949 Jan 14


			-8:00	-	PST	1970


			-7:00	Mexico	M%sT	1999


			-7:00	-	MST





# From Alexander Krivenyshev (2010-04-21):


# According to news, Bah&iacute;a de Banderas (Mexican state of Nayarit)


# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to


# share the same time zone as nearby city Puerto Vallarta, Jalisco).


#


# (Spanish)


# Bah&iacute;a de Banderas homologa su horario al del centro del


# pa&iacute;s, a partir de este domingo


# <a href="http://www.nayarit.gob.mx/notes.asp?id=20748">


# http://www.nayarit.gob.mx/notes.asp?id=20748


# </a>


#


# Bah&iacute;a de Banderas homologa su horario con el del Centro del


# Pa&iacute;s


# <a href="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">


# 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"


# </a>


#


# (English)


# Puerto Vallarta and Bah&iacute;a de Banderas: One Time Zone


# <a href="http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml">


# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml


# </a>


#


# or


# <a href="http://www.worldtimezone.com/dst_news/dst_news_mexico08.html">


# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html


# </a>


#


# "Mexico's Senate approved the amendments to the Mexican Schedule System that


# will allow Bah&iacute;a de Banderas and Puerto Vallarta to share the same time


# zone ..."


# Baja California Sur, Nayarit, Sinaloa





# From Arthur David Olson (2010-05-01):


# Use "Bahia_Banderas" to keep the name to fourteen characters.





Zone America/Mazatlan	-7:05:40 -	LMT	1921 Dec 31 23:54:20


			-7:00	-	MST	1927 Jun 10 23:00


			-6:00	-	CST	1930 Nov 15


			-7:00	-	MST	1931 May  1 23:00


			-6:00	-	CST	1931 Oct


			-7:00	-	MST	1932 Apr  1


			-6:00	-	CST	1942 Apr 24


			-7:00	-	MST	1949 Jan 14


			-8:00	-	PST	1970


			-7:00	Mexico	M%sT





Zone America/Bahia_Banderas	-7:01:00 -	LMT	1921 Dec 31 23:59:00


			-7:00	-	MST	1927 Jun 10 23:00


			-6:00	-	CST	1930 Nov 15


			-7:00	-	MST	1931 May  1 23:00


			-6:00	-	CST	1931 Oct


			-7:00	-	MST	1932 Apr  1


			-6:00	-	CST	1942 Apr 24


			-7:00	-	MST	1949 Jan 14


			-8:00	-	PST	1970


			-7:00	Mexico	M%sT	2010 Apr 4 2:00


			-6:00	Mexico	C%sT





# Baja California (near US border)


Zone America/Tijuana	-7:48:04 -	LMT	1922 Jan  1  0:11:56


			-7:00	-	MST	1924


			-8:00	-	PST	1927 Jun 10 23:00


			-7:00	-	MST	1930 Nov 15


			-8:00	-	PST	1931 Apr  1


			-8:00	1:00	PDT	1931 Sep 30


			-8:00	-	PST	1942 Apr 24


			-8:00	1:00	PWT	1945 Aug 14 23:00u


			-8:00	1:00	PPT	1945 Nov 12 # Peace


			-8:00	-	PST	1948 Apr  5


			-8:00	1:00	PDT	1949 Jan 14


			-8:00	-	PST	1954


			-8:00	CA	P%sT	1961


			-8:00	-	PST	1976


			-8:00	US	P%sT	1996


			-8:00	Mexico	P%sT	2001


			-8:00	US	P%sT	2002 Feb 20


			-8:00	Mexico	P%sT	2010


			-8:00	US	P%sT


# Baja California (away from US border)


Zone America/Santa_Isabel	-7:39:28 -	LMT	1922 Jan  1  0:20:32


			-7:00	-	MST	1924


			-8:00	-	PST	1927 Jun 10 23:00


			-7:00	-	MST	1930 Nov 15


			-8:00	-	PST	1931 Apr  1


			-8:00	1:00	PDT	1931 Sep 30


			-8:00	-	PST	1942 Apr 24


			-8:00	1:00	PWT	1945 Aug 14 23:00u


			-8:00	1:00	PPT	1945 Nov 12 # Peace


			-8:00	-	PST	1948 Apr  5


			-8:00	1:00	PDT	1949 Jan 14


			-8:00	-	PST	1954


			-8:00	CA	P%sT	1961


			-8:00	-	PST	1976


			-8:00	US	P%sT	1996


			-8:00	Mexico	P%sT	2001


			-8:00	US	P%sT	2002 Feb 20


			-8:00	Mexico	P%sT


# From Paul Eggert (2006-03-22):


# Formerly there was an America/Ensenada zone, which differed from


# America/Tijuana only in that it did not observe DST from 1976


# through 1995.  This was as per Shanks (1999).  But Shanks & Pottenger say


# Ensenada did not observe DST from 1948 through 1975.  Guy Harris reports


# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and


# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that


# DST-observance was a town-by-town matter back then.  This concerns


# data after 1970 so most likely there should be at least one Zone


# other than America/Tijuana for Baja, but it's not clear yet what its


# name or contents should be.


#


# Revillagigedo Is


# no information





###############################################################################





# Anguilla


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Anguilla	-4:12:16 -	LMT	1912 Mar 2


			-4:00	-	AST





# Antigua and Barbuda


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone	America/Antigua	-4:07:12 -	LMT	1912 Mar 2


			-5:00	-	EST	1951


			-4:00	-	AST





# Bahamas


#


# From Sue Williams (2006-12-07):


# The Bahamas announced about a month ago that they plan to change their DST


# rules to sync with the U.S. starting in 2007....


# http://www.jonesbahamas.com/?c=45&a=10412





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	Bahamas	1964	1975	-	Oct	lastSun	2:00	0	S


Rule	Bahamas	1964	1975	-	Apr	lastSun	2:00	1:00	D


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone	America/Nassau	-5:09:24 -	LMT	1912 Mar 2


			-5:00	Bahamas	E%sT	1976


			-5:00	US	E%sT





# Barbados


# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	Barb	1977	only	-	Jun	12	2:00	1:00	D


Rule	Barb	1977	1978	-	Oct	Sun>=1	2:00	0	S


Rule	Barb	1978	1980	-	Apr	Sun>=15	2:00	1:00	D


Rule	Barb	1979	only	-	Sep	30	2:00	0	S


Rule	Barb	1980	only	-	Sep	25	2:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Barbados	-3:58:28 -	LMT	1924		# Bridgetown


			-3:58:28 -	BMT	1932	  # Bridgetown Mean Time


			-4:00	Barb	A%sT





# Belize


# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.


# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	Belize	1918	1942	-	Oct	Sun>=2	0:00	0:30	HD


Rule	Belize	1919	1943	-	Feb	Sun>=9	0:00	0	S


Rule	Belize	1973	only	-	Dec	 5	0:00	1:00	D


Rule	Belize	1974	only	-	Feb	 9	0:00	0	S


Rule	Belize	1982	only	-	Dec	18	0:00	1:00	D


Rule	Belize	1983	only	-	Feb	12	0:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone	America/Belize	-5:52:48 -	LMT	1912 Apr


			-6:00	Belize	C%sT





# Bermuda





# From Dan Jones, reporting in The Royal Gazette (2006-06-26):





# Next year, however, clocks in the US will go forward on the second Sunday


# in March, until the first Sunday in November.  And, after the Time Zone


# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on


# Friday, the same thing will happen in Bermuda.


# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135





# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone Atlantic/Bermuda	-4:19:04 -	LMT	1930 Jan  1 2:00    # Hamilton


			-4:00	-	AST	1974 Apr 28 2:00


			-4:00	Bahamas	A%sT	1976


			-4:00	US	A%sT





# Cayman Is


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone	America/Cayman	-5:25:32 -	LMT	1890		# Georgetown


			-5:07:12 -	KMT	1912 Feb    # Kingston Mean Time


			-5:00	-	EST





# Costa Rica


# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	CR	1979	1980	-	Feb	lastSun	0:00	1:00	D


Rule	CR	1979	1980	-	Jun	Sun>=1	0:00	0	S


Rule	CR	1991	1992	-	Jan	Sat>=15	0:00	1:00	D


# IATA SSIM (1991-09) says the following was at 1:00;


# go with Shanks & Pottenger.


Rule	CR	1991	only	-	Jul	 1	0:00	0	S


Rule	CR	1992	only	-	Mar	15	0:00	0	S


# There are too many San Joses elsewhere, so we'll use `Costa Rica'.


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Costa_Rica	-5:36:20 -	LMT	1890		# San Jose


			-5:36:20 -	SJMT	1921 Jan 15 # San Jose Mean Time


			-6:00	CR	C%sT


# Coco


# no information; probably like America/Costa_Rica





# Cuba





# From Arthur David Olson (1999-03-29):


# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between


# the Cuban National Team and the Baltimore Orioles was carried live on


# the Orioles Radio Network, including affiliate WTOP in Washington, DC.


# During the game, play-by-play announcer Jim Hunter noted that


# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving


# Time today."  (The "two hour" remark referred to losing one hour of


# sleep on 1999-03-28--when the announcers were in Cuba as it switched


# to DST--and one more hour on 1999-04-04--when the announcers will have


# returned to Baltimore, which switches on that date.)





# From Evert van der Veer via Steffen Thorsen (2004-10-28):


# Cuba is not going back to standard time this year.


# From Paul Eggert (2006-03-22):


# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html


# says that it's due to a problem at the Antonio Guiteras


# thermoelectric plant, and says "This October there will be no return


# to normal hours (after daylight saving time)".


# For now, let's assume that it's a temporary measure.





# From Carlos A. Carnero Delgado (2005-11-12):


# This year (just like in 2004-2005) there's no change in time zone


# adjustment in Cuba.  We will stay in daylight saving time:


# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html





# From Jesper Norgaard Welen (2006-10-21):


# An article in GRANMA INTERNACIONAL claims that Cuba will end


# the 3 years of permanent DST next weekend, see


# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html


# "On Saturday night, October 28 going into Sunday, October 29, at 01:00,


# watches should be set back one hour -- going back to 00:00 hours -- returning


# to the normal schedule....





# From Paul Eggert (2007-03-02):


# http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday,


# says Cuban clocks will advance at midnight on March 10.


# For lack of better information, assume Cuba will use US rules,


# except that it switches at midnight standard time as usual.


#


# From Steffen Thorsen (2007-10-25):


# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week


# earlier - on the last Sunday of October, just like in 2006.


#


# He supplied these references:


#


# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES


# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm


#


# From Alex Kryvenishev (2007-10-25):


# Here is also article from Granma (Cuba):


#


# [Regira] el Horario Normal desde el [proximo] domingo 28 de octubre


# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html


#


# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html





# From Arthur David Olson (2008-03-09):


# I'm in Maryland which is now observing United States Eastern Daylight


# Time. At 9:44 local time I used RealPlayer to listen to


# <a href="http://media.enet.cu/radioreloj">


# http://media.enet.cu/radioreloj


# </a>, a Cuban information station, and heard


# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"),


# indicating that Cuba is still on standard time.





# From Steffen Thorsen (2008-03-12):


# It seems that Cuba will start DST on Sunday, 2007-03-16...


# It was announced yesterday, according to this source (in Spanish):


# <a href="http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm">


# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm


# </a>


#


# Some more background information is posted here:


# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html">


# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html


# </a>


#


# The article also says that Cuba has been observing DST since 1963,


# while Shanks (and tzdata) has 1965 as the first date (except in the


# 1940's). Many other web pages in Cuba also claim that it has been


# observed since 1963, but with the exception of 1970 - an exception


# which is not present in tzdata/Shanks. So there is a chance we need to


# change some historic records as well.


#


# One example:


# <a href="http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm">


# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm


# </a>





# From Jesper Norgaard Welen (2008-03-13):


# The Cuban time change has just been confirmed on the most authoritative


# web site, the Granma.  Please check out


# <a href="http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html">


# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html


# </a>


#


# Basically as expected after Steffen Thorsens information, the change


# will take place midnight between Saturday and Sunday.





# From Arthur David Olson (2008-03-12):


# Assume Sun>=15 (third Sunday) going forward.





# From Alexander Krivenyshev (2009-03-04)


# According to the Radio Reloj - Cuba will start Daylight Saving Time on


# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009-


# not on midnight March 14 / March 15 as previously thought.


#


# <a href="http://www.worldtimezone.com/dst_news/dst_news_cuba05.html">


# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html


# (in Spanish)


# </a>





# From Arthur David Olson (2009-03-09)


# I listened over the Internet to


# <a href="http://media.enet.cu/readioreloj">


# http://media.enet.cu/readioreloj


# </a>


# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the


# the time was announced as "diez cinco"--the same time as here, indicating


# that has indeed switched to DST. Assume second Sunday from 2009 forward.





# From Steffen Thorsen (2011-03-08):


# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00


# this year. Nothing about the end date known so far (if that has


# changed at all).


#


# Source:


# <a href="http://granma.co.cu/2011/03/08/nacional/artic01.html">


# http://granma.co.cu/2011/03/08/nacional/artic01.html


# </a>


#


# Our info:


# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html">


# http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html


# </a>


#


# From Steffen Thorsen (2011-10-30)


# Cuba will end DST two weeks later this year. Instead of going back


# tonight, it has been delayed to 2011-11-13 at 01:00.


#


# One source (Spanish)


# <a href="http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html">


# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html


# </a>


#


# Our page:


# <a href="http://www.timeanddate.com/news/time/cuba-time-changes-2011.html">


# http://www.timeanddate.com/news/time/cuba-time-changes-2011.html


# </a>


#


# From Steffen Thorsen (2012-03-01)


# According to Radio Reloj, Cuba will start DST on Midnight between March


# 31 and April 1.


#


# Radio Reloj has the following info (Spanish):


# <a href="http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril">


# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril


# </a>


#


# Our info on it:


# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html">


# http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html


# </a>





# From Steffen Thorsen (2012-11-03):


# Radio Reloj and many other sources report that Cuba is changing back


# to standard time on 2012-11-04:


# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre


# From Paul Eggert (2012-11-03):


# For now, assume the future rule is first Sunday in November.





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	Cuba	1928	only	-	Jun	10	0:00	1:00	D


Rule	Cuba	1928	only	-	Oct	10	0:00	0	S


Rule	Cuba	1940	1942	-	Jun	Sun>=1	0:00	1:00	D


Rule	Cuba	1940	1942	-	Sep	Sun>=1	0:00	0	S


Rule	Cuba	1945	1946	-	Jun	Sun>=1	0:00	1:00	D


Rule	Cuba	1945	1946	-	Sep	Sun>=1	0:00	0	S


Rule	Cuba	1965	only	-	Jun	1	0:00	1:00	D


Rule	Cuba	1965	only	-	Sep	30	0:00	0	S


Rule	Cuba	1966	only	-	May	29	0:00	1:00	D


Rule	Cuba	1966	only	-	Oct	2	0:00	0	S


Rule	Cuba	1967	only	-	Apr	8	0:00	1:00	D


Rule	Cuba	1967	1968	-	Sep	Sun>=8	0:00	0	S


Rule	Cuba	1968	only	-	Apr	14	0:00	1:00	D


Rule	Cuba	1969	1977	-	Apr	lastSun	0:00	1:00	D


Rule	Cuba	1969	1971	-	Oct	lastSun	0:00	0	S


Rule	Cuba	1972	1974	-	Oct	8	0:00	0	S


Rule	Cuba	1975	1977	-	Oct	lastSun	0:00	0	S


Rule	Cuba	1978	only	-	May	7	0:00	1:00	D


Rule	Cuba	1978	1990	-	Oct	Sun>=8	0:00	0	S


Rule	Cuba	1979	1980	-	Mar	Sun>=15	0:00	1:00	D


Rule	Cuba	1981	1985	-	May	Sun>=5	0:00	1:00	D


Rule	Cuba	1986	1989	-	Mar	Sun>=14	0:00	1:00	D


Rule	Cuba	1990	1997	-	Apr	Sun>=1	0:00	1:00	D


Rule	Cuba	1991	1995	-	Oct	Sun>=8	0:00s	0	S


Rule	Cuba	1996	only	-	Oct	 6	0:00s	0	S


Rule	Cuba	1997	only	-	Oct	12	0:00s	0	S


Rule	Cuba	1998	1999	-	Mar	lastSun	0:00s	1:00	D


Rule	Cuba	1998	2003	-	Oct	lastSun	0:00s	0	S


Rule	Cuba	2000	2004	-	Apr	Sun>=1	0:00s	1:00	D


Rule	Cuba	2006	2010	-	Oct	lastSun	0:00s	0	S


Rule	Cuba	2007	only	-	Mar	Sun>=8	0:00s	1:00	D


Rule	Cuba	2008	only	-	Mar	Sun>=15	0:00s	1:00	D


Rule	Cuba	2009	2010	-	Mar	Sun>=8	0:00s	1:00	D


Rule	Cuba	2011	only	-	Mar	Sun>=15	0:00s	1:00	D


Rule	Cuba	2011	only	-	Nov	13	0:00s	0	S


Rule	Cuba	2012	only	-	Apr	1	0:00s	1:00	D


Rule	Cuba	2012	max	-	Nov	Sun>=1	0:00s	0	S


Rule	Cuba	2013	max	-	Mar	Sun>=8	0:00s	1:00	D





# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone	America/Havana	-5:29:28 -	LMT	1890


			-5:29:36 -	HMT	1925 Jul 19 12:00 # Havana MT


			-5:00	Cuba	C%sT





# Dominica


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Dominica	-4:05:36 -	LMT	1911 Jul 1 0:01		# Roseau


			-4:00	-	AST





# Dominican Republic





# From Steffen Thorsen (2000-10-30):


# Enrique Morales reported to me that the Dominican Republic has changed the


# time zone to Eastern Standard Time as of Sunday 29 at 2 am....


# http://www.listin.com.do/antes/261000/republica/princi.html





# From Paul Eggert (2000-12-04):


# That URL (2000-10-26, in Spanish) says they planned to use US-style DST.





# From Rives McDow (2000-12-01):


# Dominican Republic changed its mind and presidential decree on Tuesday,


# November 28, 2000, with a new decree.  On Sunday, December 3 at 1:00 AM the


# Dominican Republic will be reverting to 8 hours from the International Date


# Line, and will not be using DST in the foreseeable future.  The reason they


# decided to use DST was to be in synch with Puerto Rico, who was also going


# to implement DST.  When Puerto Rico didn't implement DST, the president


# decided to revert.








# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	DR	1966	only	-	Oct	30	0:00	1:00	D


Rule	DR	1967	only	-	Feb	28	0:00	0	S


Rule	DR	1969	1973	-	Oct	lastSun	0:00	0:30	HD


Rule	DR	1970	only	-	Feb	21	0:00	0	S


Rule	DR	1971	only	-	Jan	20	0:00	0	S


Rule	DR	1972	1974	-	Jan	21	0:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Santo_Domingo -4:39:36 -	LMT	1890


			-4:40	-	SDMT	1933 Apr  1 12:00 # S. Dom. MT


			-5:00	DR	E%sT	1974 Oct 27


			-4:00	-	AST	2000 Oct 29 02:00


			-5:00	US	E%sT	2000 Dec  3 01:00


			-4:00	-	AST





# El Salvador





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	Salv	1987	1988	-	May	Sun>=1	0:00	1:00	D


Rule	Salv	1987	1988	-	Sep	lastSun	0:00	0	S


# There are too many San Salvadors elsewhere, so use America/El_Salvador


# instead of America/San_Salvador.


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/El_Salvador -5:56:48 -	LMT	1921		# San Salvador


			-6:00	Salv	C%sT





# Grenada


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone	America/Grenada	-4:07:00 -	LMT	1911 Jul	# St George's


			-4:00	-	AST





# Guadeloupe


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Guadeloupe	-4:06:08 -	LMT	1911 Jun 8	# Pointe a Pitre


			-4:00	-	AST


# St Barthelemy


Link America/Guadeloupe	America/St_Barthelemy


# St Martin (French part)


Link America/Guadeloupe	America/Marigot





# Guatemala


#


# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:


# Diario Co Latino, at


# http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079,


# says in an article dated 2006-04-19 that the Guatemalan government had


# decided on that date to advance official time by 60 minutes, to lessen the


# impact of the elevated cost of oil....  Daylight saving time will last from


# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).


# From Paul Eggert (2006-06-22):


# The Ministry of Energy and Mines, press release CP-15/2006


# (2006-04-19), says DST ends at 24:00.  See


# <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>.





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	Guat	1973	only	-	Nov	25	0:00	1:00	D


Rule	Guat	1974	only	-	Feb	24	0:00	0	S


Rule	Guat	1983	only	-	May	21	0:00	1:00	D


Rule	Guat	1983	only	-	Sep	22	0:00	0	S


Rule	Guat	1991	only	-	Mar	23	0:00	1:00	D


Rule	Guat	1991	only	-	Sep	 7	0:00	0	S


Rule	Guat	2006	only	-	Apr	30	0:00	1:00	D


Rule	Guat	2006	only	-	Oct	 1	0:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Guatemala	-6:02:04 -	LMT	1918 Oct 5


			-6:00	Guat	C%sT





# Haiti


# From Gwillim Law (2005-04-15):


# Risto O. Nykanen wrote me that Haiti is now on DST.


# I searched for confirmation, and I found a


# <a href="http://www.haitianconsulate.org/time.doc"> press release


# on the Web page of the Haitian Consulate in Chicago (2005-03-31),


# </a>.  Translated from French, it says:


#


#  "The Prime Minister's Communication Office notifies the public in general


#   and the press in particular that, following a decision of the Interior


#   Ministry and the Territorial Collectivities [I suppose that means the


#   provinces], Haiti will move to Eastern Daylight Time in the night from next


#   Saturday the 2nd to Sunday the 3rd.


#


#  "Consequently, the Prime Minister's Communication Office wishes to inform


#   the population that the country's clocks will be set forward one hour


#   starting at midnight.  This provision will hold until the last Saturday in


#   October 2005.


#


#  "Port-au-Prince, March 31, 2005"


#


# From Steffen Thorsen (2006-04-04):


# I have been informed by users that Haiti observes DST this year like


# last year, so the current "only" rule for 2005 might be changed to a


# "max" rule or to last until 2006. (Who knows if they will observe DST


# next year or if they will extend their DST like US/Canada next year).


#


# I have found this article about it (in French):


# http://www.haitipressnetwork.com/news.cfm?articleID=7612


#


# The reason seems to be an energy crisis.





# From Stephen Colebourne (2007-02-22):


# Some IATA info: Haiti won't be having DST in 2007.





# From Steffen Thorsen (2012-03-11):


# According to several news sources, Haiti will observe DST this year,


# apparently using the same start and end date as USA/Canada.


# So this means they have already changed their time.


#


# (Sources in French):


# <a href="http://www.alterpresse.org/spip.php?article12510">


# http://www.alterpresse.org/spip.php?article12510


# </a>


# <a href="http://radiovision2000haiti.net/home/?p=13253">


# http://radiovision2000haiti.net/home/?p=13253


# </a>


#


# Our coverage:


# <a href="http://www.timeanddate.com/news/time/haiti-dst-2012.html">


# http://www.timeanddate.com/news/time/haiti-dst-2012.html


# </a>





# From Arthur David Olson (2012-03-11):


# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to


# 3:00 a.m. rather than the traditional Haitian jump at midnight.


# Assume a US-style fall back as well XXX.


# Do not yet assume that the change carries forward past 2012 XXX.





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	Haiti	1983	only	-	May	8	0:00	1:00	D


Rule	Haiti	1984	1987	-	Apr	lastSun	0:00	1:00	D


Rule	Haiti	1983	1987	-	Oct	lastSun	0:00	0	S


# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.


# Go with IATA.


Rule	Haiti	1988	1997	-	Apr	Sun>=1	1:00s	1:00	D


Rule	Haiti	1988	1997	-	Oct	lastSun	1:00s	0	S


Rule	Haiti	2005	2006	-	Apr	Sun>=1	0:00	1:00	D


Rule	Haiti	2005	2006	-	Oct	lastSun	0:00	0	S


Rule	Haiti	2012	only	-	Mar	Sun>=8	2:00	1:00	D


Rule	Haiti	2012	only	-	Nov	Sun>=1	2:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Port-au-Prince -4:49:20 -	LMT	1890


			-4:49	-	PPMT	1917 Jan 24 12:00 # P-a-P MT


			-5:00	Haiti	E%sT





# Honduras


# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.





# From Paul Eggert (2006-05-05):


# worldtimezone.com reports a 2006-05-02 Spanish-language AP article


# saying Honduras will start using DST midnight Saturday, effective 4


# months until September.  La Tribuna reported today


# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president


# of Honduras, refused to back down on this.





# From Jesper Norgaard Welen (2006-08-08):


# It seems that Honduras has returned from DST to standard time this Monday at


# 00:00 hours (prolonging Sunday to 25 hours duration).


# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html





# From Paul Eggert (2006-08-08):


# Also see Diario El Heraldo, The country returns to standard time (2006-08-08)


# <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>.


# It mentions executive decree 18-2006.





# From Steffen Thorsen (2006-08-17):


# Honduras will observe DST from 2007 to 2009, exact dates are not


# published, I have located this authoritative source:


# http://www.presidencia.gob.hn/noticia.aspx?nId=47





# From Steffen Thorsen (2007-03-30):


# http://www.laprensahn.com/pais_nota.php?id04962=7386


# So it seems that Honduras will not enter DST this year....





# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	Hond	1987	1988	-	May	Sun>=1	0:00	1:00	D


Rule	Hond	1987	1988	-	Sep	lastSun	0:00	0	S


Rule	Hond	2006	only	-	May	Sun>=1	0:00	1:00	D


Rule	Hond	2006	only	-	Aug	Mon>=1	0:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Tegucigalpa -5:48:52 -	LMT	1921 Apr


			-6:00	Hond	C%sT


#


# Great Swan I ceded by US to Honduras in 1972





# Jamaica





# From Bob Devine (1988-01-28):


# Follows US rules.





# From U. S. Naval Observatory (1989-01-19):


# JAMAICA             5 H  BEHIND UTC





# From Shanks & Pottenger:


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone	America/Jamaica	-5:07:12 -	LMT	1890		# Kingston


			-5:07:12 -	KMT	1912 Feb    # Kingston Mean Time


			-5:00	-	EST	1974 Apr 28 2:00


			-5:00	US	E%sT	1984


			-5:00	-	EST





# Martinique


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Martinique	-4:04:20 -      LMT	1890		# Fort-de-France


			-4:04:20 -	FFMT	1911 May     # Fort-de-France MT


			-4:00	-	AST	1980 Apr  6


			-4:00	1:00	ADT	1980 Sep 28


			-4:00	-	AST





# Montserrat


# From Paul Eggert (2006-03-22):


# In 1995 volcanic eruptions forced evacuation of Plymouth, the capital.


# world.gazetteer.com says Cork Hill is the most populous location now.


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Montserrat	-4:08:52 -	LMT	1911 Jul 1 0:01   # Cork Hill


			-4:00	-	AST





# Nicaragua


#


# This uses Shanks & Pottenger for times before 2005.


#


# From Steffen Thorsen (2005-04-12):


# I've got reports from 8 different people that Nicaragua just started


# DST on Sunday 2005-04-10, in order to save energy because of


# expensive petroleum.  The exact end date for DST is not yet


# announced, only "September" but some sites also say "mid-September".


# Some background information is available on the President's official site:


# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm


# The Decree, no 23-2005 is available here:


# 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


#


# From Paul Eggert (2005-05-01):


# The decree doesn't say anything about daylight saving, but for now let's


# assume that it is daylight saving....


#


# From Gwillim Law (2005-04-21):


# The Associated Press story on the time change, which can be found at


# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html


# and elsewhere, says (fifth paragraph, translated from Spanish):  "The last


# time that a change of clocks was applied to save energy was in the year 2000


# during the Arnoldo Aleman administration."...


# The northamerica file says that Nicaragua has been on UTC-6 continuously


# since December 1998.  I wasn't able to find any details of Nicaraguan time


# changes in 2000.  Perhaps a note could be added to the northamerica file, to


# the effect that we have indirect evidence that DST was observed in 2000.


#


# From Jesper Norgaard Welen (2005-11-02):


# Nicaragua left DST the 2005-10-02 at 00:00 (local time).


# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm


# (2005-09-26)


#


# From Jesper Norgaard Welen (2006-05-05):


# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410


# (my informal translation)


# By order of the president of the republic, Enrique Bolanos, Nicaragua


# advanced by sixty minutes their official time, yesterday at 2 in the


# morning, and will stay that way until 30.th. of september.


#


# From Jesper Norgaard Welen (2006-09-30):


# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf


# My informal translation runs:


# The natural sun time is restored in all the national territory, in that the


# time is returned one hour at 01:00 am of October 1 of 2006.


#


# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	Nic	1979	1980	-	Mar	Sun>=16	0:00	1:00	D


Rule	Nic	1979	1980	-	Jun	Mon>=23	0:00	0	S


Rule	Nic	2005	only	-	Apr	10	0:00	1:00	D


Rule	Nic	2005	only	-	Oct	Sun>=1	0:00	0	S


Rule	Nic	2006	only	-	Apr	30	2:00	1:00	D


Rule	Nic	2006	only	-	Oct	Sun>=1	1:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone	America/Managua	-5:45:08 -	LMT	1890


			-5:45:12 -	MMT	1934 Jun 23 # Managua Mean Time?


			-6:00	-	CST	1973 May


			-5:00	-	EST	1975 Feb 16


			-6:00	Nic	C%sT	1992 Jan  1 4:00


			-5:00	-	EST	1992 Sep 24


			-6:00	-	CST	1993


			-5:00	-	EST	1997


			-6:00	Nic	C%sT





# Panama


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone	America/Panama	-5:18:08 -	LMT	1890


			-5:19:36 -	CMT	1908 Apr 22   # Colon Mean Time


			-5:00	-	EST





# Puerto Rico


# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'.


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Puerto_Rico -4:24:25 -	LMT	1899 Mar 28 12:00    # San Juan


			-4:00	-	AST	1942 May  3


			-4:00	US	A%sT	1946


			-4:00	-	AST





# St Kitts-Nevis


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/St_Kitts	-4:10:52 -	LMT	1912 Mar 2	# Basseterre


			-4:00	-	AST





# St Lucia


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/St_Lucia	-4:04:00 -	LMT	1890		# Castries


			-4:04:00 -	CMT	1912	    # Castries Mean Time


			-4:00	-	AST





# St Pierre and Miquelon


# There are too many St Pierres elsewhere, so we'll use `Miquelon'.


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Miquelon	-3:44:40 -	LMT	1911 May 15	# St Pierre


			-4:00	-	AST	1980 May


			-3:00	-	PMST	1987 # Pierre & Miquelon Time


			-3:00	Canada	PM%sT





# St Vincent and the Grenadines


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/St_Vincent	-4:04:56 -	LMT	1890		# Kingstown


			-4:04:56 -	KMT	1912	   # Kingstown Mean Time


			-4:00	-	AST





# Turks and Caicos


#


# From Chris Dunn in


# <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007>


# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the


# daylight saving dates for time changes have been adjusted to match


# the recent U.S. change of dates.


#


# From Brian Inglis (2007-04-28):


# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]


# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three


# rows before that there is an out of date entry for Oct:


# "Eastern Standard Times Begins 2007


# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time"


# indicating that the normal ET rules are followed.


#


# From Paul Eggert (2006-05-01):


# Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998)


# says they switch at midnight.  Go with Shanks & Pottenger.


#


# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S


Rule	TC	1979	1986	-	Apr	lastSun	2:00	1:00	D


Rule	TC	1979	2006	-	Oct	lastSun	2:00	0	S


Rule	TC	1987	2006	-	Apr	Sun>=1	2:00	1:00	D


Rule	TC	2007	max	-	Mar	Sun>=8	2:00	1:00	D


Rule	TC	2007	max	-	Nov	Sun>=1	2:00	0	S


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Grand_Turk	-4:44:32 -	LMT	1890


			-5:07:12 -	KMT	1912 Feb    # Kingston Mean Time


			-5:00	TC	E%sT





# British Virgin Is


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/Tortola	-4:18:28 -	LMT	1911 Jul    # Road Town


			-4:00	-	AST





# Virgin Is


# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]


Zone America/St_Thomas	-4:19:44 -	LMT	1911 Jul    # Charlotte Amalie


			-4:00	-	AST


