File:  [DragonFly] / src / share / zoneinfo / northamerica
Revision 1.7: download - view: text, annotated - select for diffs
Sat Dec 31 03:15:55 2005 UTC (8 years, 3 months ago) by swildner
Branches: MAIN
CVS tags: HEAD, DragonFly_RELEASE_1_6
Sync zoneinfo database with tzdata2005r from elsie.

africa:         7.39 -> 7.40
antarctica:     7.25 -> 7.30
asia:           7.88 -> 7.90
australasia:    7.74 -> 7.78
backward:	7.29 -> 7.30
europe:         7.95 -> 7.96
northamerica:   7.82 -> 7.87
southamerica:   7.63 -> 7.66
systemv:        7.3  -> 7.5

- Make systemv rules distinct files rather than linking them to particular
  geographic areas (that might change rules).

- Remove email addresses.

- Remove dead URLs.

- Adjust Canada and Winn rules to follow the US changes to DST in 2007.

- Add "<pre>" directives.

    1: # @(#)northamerica	7.87
    2: # <pre>
    3: 
    4: # also includes Central America and the Caribbean
    5: 
    6: # This data is by no means authoritative; if you think you know better,
    7: # go ahead and edit the file (and please send any changes to
    8: # tz@elsie.nci.nih.gov for general use in the future).
    9: 
   10: # From Paul Eggert (1999-03-22):
   11: # A reliable and entertaining source about time zones is
   12: # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
   13: 
   14: ###############################################################################
   15: 
   16: # United States
   17: 
   18: # From Paul Eggert (1999-03-31):
   19: # Howse writes (pp 121-125) that time zones were invented by
   20: # Professor Charles Ferdinand Dowd (1825-1904),
   21: # Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).
   22: # His pamphlet ``A System of National Time for Railroads'' (1870)
   23: # was the result of his proposals at the Convention of Railroad Trunk Lines
   24: # in New York City (1869-10).  His 1870 proposal was based on Washington, DC,
   25: # but in 1872-05 he moved the proposed origin to Greenwich.
   26: # His proposal was adopted by the railroads on 1883-11-18 at 12:00,
   27: # and the most of the country soon followed suit.
   28: 
   29: # From Paul Eggert (2005-04-16):
   30: # That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
   31: # See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).
   32: 
   33: # From Paul Eggert (1995-12-19):
   34: # A good source for time zone historical data in the US is
   35: # Thomas G. Shanks, The American Atlas (5th edition),
   36: # San Diego: ACS Publications, Inc. (1991).
   37: # Make sure you have the errata sheet; the book is somewhat useless without it.
   38: # It is the source for most of the pre-1991 US and Puerto Rico entries below.
   39: 
   40: # From Paul Eggert (2001-03-06):
   41: # Daylight Saving Time was first suggested as a joke by Benjamin Franklin
   42: # in his whimsical essay ``An Economical Project for Diminishing the Cost
   43: # of Light'' published in the Journal de Paris (1784-04-26).
   44: # Not everyone is happy with the results:
   45: #
   46: #	I don't really care how time is reckoned so long as there is some
   47: #	agreement about it, but I object to being told that I am saving
   48: #	daylight when my reason tells me that I am doing nothing of the kind.
   49: #	I even object to the implication that I am wasting something
   50: #	valuable if I stay in bed after the sun has risen.  As an admirer
   51: #	of moonlight I resent the bossy insistence of those who want to
   52: #	reduce my time for enjoying it.  At the back of the Daylight Saving
   53: #	scheme I detect the bony, blue-fingered hand of Puritanism, eager
   54: #	to push people into bed earlier, and get them up earlier, to make
   55: #	them healthy, wealthy and wise in spite of themselves.
   56: #
   57: #	-- Robertson Davies, The diary of Samuel Marchbanks,
   58: #	   Clarke, Irwin (1947), XIX, Sunday
   59: #
   60: # For more about the first ten years of DST in the United States, see
   61: # Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html">
   62: # Ten years of daylight saving from the Pittsburgh standpoint
   63: # (Carnegie Library of Pittsburgh, 1927)</a>.
   64: #
   65: # Shanks says that DST was called "War Time" in the US in 1918 and 1919.
   66: # However, DST was imposed by the Standard Time Act of 1918, which
   67: # was the first nationwide legal time standard, and apparently
   68: # time was just called "Standard Time" or "Daylight Saving Time".
   69: 
   70: # From Arthur David Olson:
   71: # US Daylight Saving Time ended on the last Sunday of *October* in 1974.
   72: # See, for example, the front page of the Saturday, 1974-10-26
   73: # and Sunday, 1974-10-27 editions of the Washington Post.
   74: 
   75: # From Arthur David Olson:
   76: # Before the Uniform Time Act of 1966 took effect in 1967, observance of
   77: # Daylight Saving Time in the US was by local option, except during wartime.
   78: 
   79: # From Arthur David Olson (2000-09-25):
   80: # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
   81: # In the introduction, Oboler spoke of "Eastern Peace Time."
   82: # An AltaVista search turned up
   83: # <a href="http://rowayton.org/rhs/hstaug45.html">:
   84: # "When the time is announced over the radio now, it is 'Eastern Peace
   85: # Time' instead of the old familiar 'Eastern War Time.'  Peace is wonderful."
   86: # </a> (August 1945) by way of confirmation.
   87: 
   88: # From Joseph Gallant citing
   89: # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
   90: # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
   91: # to switch to London for Attlee's address, but the American people
   92: # never got to hear his speech live. According to one press account,
   93: # CBS' Bob Trout was first to announce the word of Japan's surrender,
   94: # but a few seconds later, NBC, ABC and Mutual also flashed the word
   95: # of surrender, all of whom interrupting the bells of Big Ben in
   96: # London which were to precede Mr. Attlee's speech.
   97: 
   98: # From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout.  From
   99: # Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times:
  100: #
  101: # ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender.
  102: # Any announcement from Asia would reach St. John's New York newsroom on a
  103: # wire service teletype machine, which had prescribed signals for major news.
  104: # Associated Press, for example, would ring five bells before spewing out
  105: # typed copy of an important story, and 10 bells for news "of transcendental
  106: # importance."
  107: #
  108: # On Aug. 14, stalling while talking steadily into the NBC networks' open
  109: # microphone, St. John heard five bells and waited only to hear a sixth bell,
  110: # before announcing confidently: "Ladies and gentlemen, World War II is over.
  111: # The Japanese have agreed to our surrender terms."
  112: #
  113: # He had scored a 20-second scoop on other broadcasters.
  114: 
  115: # From Arthur David Olson (2005-08-22):
  116: # Paul has been careful to use the "US" rules only in those locations
  117: # that are part of the United States; this reflects the real scope of
  118: # U.S. government action.  So even though the "US" rules have changed
  119: # in the latest release, other countries won't be affected.
  120: 
  121: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
  122: Rule	US	1918	1919	-	Mar	lastSun	2:00	1:00	D
  123: Rule	US	1918	1919	-	Oct	lastSun	2:00	0	S
  124: Rule	US	1942	only	-	Feb	9	2:00	1:00	W # War
  125: Rule	US	1945	only	-	Aug	14	23:00u	1:00	P # Peace
  126: Rule	US	1945	only	-	Sep	30	2:00	0	S
  127: Rule	US	1967	2006	-	Oct	lastSun	2:00	0	S
  128: Rule	US	1967	1973	-	Apr	lastSun	2:00	1:00	D
  129: Rule	US	1974	only	-	Jan	6	2:00	1:00	D
  130: Rule	US	1975	only	-	Feb	23	2:00	1:00	D
  131: Rule	US	1976	1986	-	Apr	lastSun	2:00	1:00	D
  132: Rule	US	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
  133: Rule	US	2007	max	-	Mar	Sun>=8	2:00	1:00	D
  134: Rule	US	2007	max	-	Nov	Sun>=1	2:00	0	S
  135: 
  136: # From Arthur David Olson, 2005-12-19
  137: # We generate the files specified below to guard against old files with
  138: # obsolete information being left in the time zone binary directory.
  139: # We limit the list to names that have appeared in previous versions of
  140: # this time zone package.
  141: # We do these as separate Zones rather than as Links to avoid problems if
  142: # a particular place changes whether it observes DST.
  143: # We put these specifications here in the northamerica file both to
  144: # increase the chances that they'll actually get compiled and to
  145: # avoid the need to duplicate the US rules in another file.
  146: 
  147: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  148: Zone	EST		 -5:00	-	EST
  149: Zone	MST		 -7:00	-	MST
  150: Zone	HST		-10:00	-	HST
  151: Zone	EST5EDT		 -5:00	US	E%sT
  152: Zone	CST6CDT		 -6:00	US	C%sT
  153: Zone	MST7MDT		 -7:00	US	M%sT
  154: Zone	PST8PDT		 -8:00	US	P%sT
  155: 
  156: # From Bob Devine (1988-01-28):
  157: # ...Alaska (and Hawaii) had the timezone names changed in 1967.
  158: #    old			 new
  159: #    Pacific Standard Time(PST)  -same-
  160: #    Yukon Standard Time(YST)    -same-
  161: #    Central Alaska S.T. (CAT)   Alaska-Hawaii St[an]dard Time (AHST)
  162: #    Nome Standard Time (NT)     Bering Standard Time (BST)
  163: #
  164: # ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz.
  165: #    The YST zone now covers nearly all of the state, AHST just part
  166: #    of the Aleutian islands.   No DST.
  167: 
  168: # From Paul Eggert (1995-12-19):
  169: # The tables below use `NST', not `NT', for Nome Standard Time.
  170: # I invented `CAWT' for Central Alaska War Time.
  171: 
  172: # From U. S. Naval Observatory (1989-01-19):
  173: # USA  EASTERN       5 H  BEHIND UTC    NEW YORK, WASHINGTON
  174: # USA  EASTERN       4 H  BEHIND UTC    APR 3 - OCT 30
  175: # USA  CENTRAL       6 H  BEHIND UTC    CHICAGO, HOUSTON
  176: # USA  CENTRAL       5 H  BEHIND UTC    APR 3 - OCT 30
  177: # USA  MOUNTAIN      7 H  BEHIND UTC    DENVER
  178: # USA  MOUNTAIN      6 H  BEHIND UTC    APR 3 - OCT 30
  179: # USA  PACIFIC       8 H  BEHIND UTC    L.A., SAN FRANCISCO
  180: # USA  PACIFIC       7 H  BEHIND UTC    APR 3 - OCT 30
  181: # USA  ALASKA STD    9 H  BEHIND UTC    MOST OF ALASKA     (AKST)
  182: # USA  ALASKA STD    8 H  BEHIND UTC    APR 3 - OCT 30 (AKDT)
  183: # USA  ALEUTIAN     10 H  BEHIND UTC    ISLANDS WEST OF 170W
  184: # USA  - " -         9 H  BEHIND UTC    APR 3 - OCT 30
  185: # USA  HAWAII       10 H  BEHIND UTC
  186: # USA  BERING       11 H  BEHIND UTC    SAMOA, MIDWAY
  187: 
  188: # From Arthur David Olson (1989-01-21):
  189: # The above dates are for 1988.
  190: # Note the "AKST" and "AKDT" abbreviations, the claim that there's
  191: # no DST in Samoa, and the claim that there is DST in Alaska and the
  192: # Aleutians.
  193: 
  194: # From Arthur David Olson (1988-02-13):
  195: # Legal standard time zone names, from United States Code (1982 Edition and
  196: # Supplement III), Title 15, Chapter 6, Section 260 and forward.  First, names
  197: # up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966
  198: # took effect), as explained in sections 263 and 261:
  199: #	(none)
  200: #	United States standard eastern time
  201: #	United States standard mountain time
  202: #	United States standard central time
  203: #	United States standard Pacific time
  204: #	(none)
  205: #	United States standard Alaska time
  206: #	(none)
  207: # Next, names from 1967-04-01 until 1983-11-30 (the date for
  208: # public law 98-181):
  209: #	Atlantic standard time
  210: #	eastern standard time
  211: #	central standard time
  212: #	mountain standard time
  213: #	Pacific standard time
  214: #	Yukon standard time
  215: #	Alaska-Hawaii standard time
  216: #	Bering standard time
  217: # And after 1983-11-30:
  218: #	Atlantic standard time
  219: #	eastern standard time
  220: #	central standard time
  221: #	mountain standard time
  222: #	Pacific standard time
  223: #	Alaska standard time
  224: #	Hawaii-Aleutian standard time
  225: #	Samoa standard time
  226: # The law doesn't give abbreviations.
  227: #
  228: # From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
  229: # Public law 106-564 (2000-12-23) introduced the abbreviation
  230: # "Chamorro Standard Time" for time in Guam and the Northern Marianas.
  231: # See the file "australasia".
  232:  
  233: # From Arthur David Olson, 2005-08-09
  234: # The following was signed into law on 2005-08-08.
  235: #
  236: # H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
  237: #   (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15
  238: #   U.S.C. 260a(a)) is amended--
  239: #     (1) by striking `first Sunday of April' and inserting `second
  240: #     Sunday of March'; and
  241: #     (2) by striking `last Sunday of October' and inserting `first
  242: #     Sunday of November'.
  243: #   (b) Effective Date- Subsection (a) shall take effect 1 year after the
  244: #   date of enactment of this Act or March 1, 2007, whichever is later.
  245: #   (c) Report to Congress- Not later than 9 months after the effective
  246: #   date stated in subsection (b), the Secretary shall report to Congress
  247: #   on the impact of this section on energy consumption in the United
  248: #   States.
  249: #   (d) Right to Revert- Congress retains the right to revert the
  250: #   Daylight Saving Time back to the 2005 time schedules once the
  251: #   Department study is complete.
  252: 
  253: # US eastern time, represented by New York
  254: 
  255: # Connecticut, Delaware, District of Columbia, most of Florida,
  256: # Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky
  257: # (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts,
  258: # New Hampshire, New Jersey, New York, North Carolina, Ohio,
  259: # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee,
  260: # Vermont, Virginia, West Virginia
  261: 
  262: # From Dave Cantor (2004-11-02):
  263: # Early this summer I had the occasion to visit the Mount Washington
  264: # Observatory weather station atop (of course!) Mount Washington [, NH]....
  265: # One of the staff members said that the station was on Eastern Standard Time
  266: # and didn't change their clocks for Daylight Saving ... so that their
  267: # reports will always have times which are 5 hours behind UTC.
  268: 
  269: # From Paul Eggert (2005-08-26):
  270: # According to today's Huntsville Times
  271: # <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1>
  272: # a few towns on Alabama's "eastern border with Georgia, such as Phenix City
  273: # in Russell County, Lanett in Chambers County and some towns in Lee County,
  274: # set their watches and clocks on Eastern time."  It quotes H.H. "Bubba"
  275: # Roberts, city administrator in Phenix City. as saying "We are in the Central
  276: # time zone, but we do go by the Eastern time zone because so many people work
  277: # in Columbus." 
  278: 
  279: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
  280: Rule	NYC	1920	only	-	Mar	lastSun	2:00	1:00	D
  281: Rule	NYC	1920	only	-	Oct	lastSun	2:00	0	S
  282: Rule	NYC	1921	1966	-	Apr	lastSun	2:00	1:00	D
  283: Rule	NYC	1921	1954	-	Sep	lastSun	2:00	0	S
  284: Rule	NYC	1955	1966	-	Oct	lastSun	2:00	0	S
  285: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  286: Zone America/New_York	-4:56:02 -	LMT	1883 Nov 18 12:03:58
  287: 			-5:00	US	E%sT	1920
  288: 			-5:00	NYC	E%sT	1942
  289: 			-5:00	US	E%sT	1946
  290: 			-5:00	NYC	E%sT	1967
  291: 			-5:00	US	E%sT
  292: 
  293: # US central time, represented by Chicago
  294: 
  295: # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
  296: # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
  297: # Washington counties), Illinois, western Indiana
  298: # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
  299: # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
  300: # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
  301: # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
  302: # western Tennessee, most of Texas, Wisconsin
  303: 
  304: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
  305: Rule	Chicago	1920	only	-	Jun	13	2:00	1:00	D
  306: Rule	Chicago	1920	1921	-	Oct	lastSun	2:00	0	S
  307: Rule	Chicago	1921	only	-	Mar	lastSun	2:00	1:00	D
  308: Rule	Chicago	1922	1966	-	Apr	lastSun	2:00	1:00	D
  309: Rule	Chicago	1922	1954	-	Sep	lastSun	2:00	0	S
  310: Rule	Chicago	1955	1966	-	Oct	lastSun	2:00	0	S
  311: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  312: Zone America/Chicago	-5:50:36 -	LMT	1883 Nov 18 12:09:24
  313: 			-6:00	US	C%sT	1920
  314: 			-6:00	Chicago	C%sT	1936 Mar  1 2:00
  315: 			-5:00	-	EST	1936 Nov 15 2:00
  316: 			-6:00	Chicago	C%sT	1942
  317: 			-6:00	US	C%sT	1946
  318: 			-6:00	Chicago	C%sT	1967
  319: 			-6:00	US	C%sT
  320: # Oliver County, ND switched from mountain to central time on 1992-10-25.
  321: Zone America/North_Dakota/Center -6:45:12 - LMT	1883 Nov 18 12:14:48
  322: 			-7:00	US	M%sT	1992 Oct 25 02:00
  323: 			-6:00	US	C%sT
  324: 
  325: # US mountain time, represented by Denver
  326: #
  327: # Colorado, far western Kansas, Montana, western
  328: # Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City),
  329: # New Mexico, southwestern North Dakota, far eastern Oregon,
  330: # western South Dakota, far western Texas (El Paso County, Hudspeth County,
  331: # and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming
  332: #
  333: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
  334: Rule	Denver	1920	1921	-	Mar	lastSun	2:00	1:00	D
  335: Rule	Denver	1920	only	-	Oct	lastSun	2:00	0	S
  336: Rule	Denver	1921	only	-	May	22	2:00	0	S
  337: Rule	Denver	1965	1966	-	Apr	lastSun	2:00	1:00	D
  338: Rule	Denver	1965	1966	-	Oct	lastSun	2:00	0	S
  339: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  340: Zone America/Denver	-6:59:56 -	LMT	1883 Nov 18 12:00:04
  341: 			-7:00	US	M%sT	1920
  342: 			-7:00	Denver	M%sT	1942
  343: 			-7:00	US	M%sT	1946
  344: 			-7:00	Denver	M%sT	1967
  345: 			-7:00	US	M%sT
  346: 
  347: # US Pacific time, represented by Los Angeles
  348: #
  349: # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
  350: # Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties),
  351: # most of Nevada, most of Oregon, and Washington
  352: #
  353: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
  354: Rule	CA	1948	only	-	Mar	14	2:00	1:00	D
  355: Rule	CA	1949	only	-	Jan	 1	2:00	0	S
  356: Rule	CA	1950	1966	-	Apr	lastSun	2:00	1:00	D
  357: Rule	CA	1950	1961	-	Sep	lastSun	2:00	0	S
  358: Rule	CA	1962	1966	-	Oct	lastSun	2:00	0	S
  359: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  360: Zone America/Los_Angeles -7:52:58 -	LMT	1883 Nov 18 12:07:02
  361: 			-8:00	US	P%sT	1946
  362: 			-8:00	CA	P%sT	1967
  363: 			-8:00	US	P%sT
  364: 
  365: # Alaska
  366: # AK%sT is the modern abbreviation for -9:00 per USNO.
  367: #
  368: # From Paul Eggert (2001-05-30):
  369: # Howse writes that Alaska switched from the Julian to the Gregorian calendar,
  370: # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
  371: # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian,
  372: # also a Friday.  Include only the time zone part of this transition,
  373: # ignoring the switch from Julian to Gregorian, since we can't represent
  374: # the Julian calendar.
  375: #
  376: # As far as we know, none of the exact locations mentioned below were
  377: # permanently inhabited in 1867 by anyone using either calendar.
  378: # (Yakutat was colonized by the Russians in 1799, but the settlement
  379: # was destroyed in 1805 by a Yakutat-kon war party.)  However, there
  380: # were nearby inhabitants in some cases and for our purposes perhaps
  381: # it's best to simply use the official transition.
  382: #
  383: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  384: Zone America/Juneau	 15:02:19 -	LMT	1867 Oct 18
  385: 			 -8:57:41 -	LMT	1900 Aug 20 12:00
  386: 			 -8:00	-	PST	1942
  387: 			 -8:00	US	P%sT	1946
  388: 			 -8:00	-	PST	1969
  389: 			 -8:00	US	P%sT	1983 Oct 30 2:00
  390: 			 -9:00	US	Y%sT	1983 Nov 30
  391: 			 -9:00	US	AK%sT
  392: Zone America/Yakutat	 14:41:05 -	LMT	1867 Oct 18
  393: 			 -9:18:55 -	LMT	1900 Aug 20 12:00
  394: 			 -9:00	-	YST	1942
  395: 			 -9:00	US	Y%sT	1946
  396: 			 -9:00	-	YST	1969
  397: 			 -9:00	US	Y%sT	1983 Nov 30
  398: 			 -9:00	US	AK%sT
  399: Zone America/Anchorage	 14:00:24 -	LMT	1867 Oct 18
  400: 			 -9:59:36 -	LMT	1900 Aug 20 12:00
  401: 			-10:00	-	CAT	1942
  402: 			-10:00	US	CAT/CAWT 1946
  403: 			-10:00	-	CAT	1967 Apr
  404: 			-10:00	-	AHST	1969
  405: 			-10:00	US	AH%sT	1983 Oct 30 2:00
  406: 			 -9:00	US	Y%sT	1983 Nov 30
  407: 			 -9:00	US	AK%sT
  408: Zone America/Nome	 12:58:21 -	LMT	1867 Oct 18
  409: 			-11:01:38 -	LMT	1900 Aug 20 12:00
  410: 			-11:00	-	NST	1942
  411: 			-11:00	US	N%sT	1946
  412: 			-11:00	-	NST	1967 Apr
  413: 			-11:00	-	BST	1969
  414: 			-11:00	US	B%sT	1983 Oct 30 2:00
  415: 			 -9:00	US	Y%sT	1983 Nov 30
  416: 			 -9:00	US	AK%sT
  417: Zone America/Adak	 12:13:21 -	LMT	1867 Oct 18
  418: 			-11:46:38 -	LMT	1900 Aug 20 12:00
  419: 			-11:00	-	NST	1942
  420: 			-11:00	US	N%sT	1946
  421: 			-11:00	-	NST	1967 Apr
  422: 			-11:00	-	BST	1969
  423: 			-11:00	US	B%sT	1983 Oct 30 2:00
  424: 			-10:00	US	AH%sT	1983 Nov 30
  425: 			-10:00	US	HA%sT
  426: # The following switches don't quite make our 1970 cutoff.
  427: #
  428: # Shanks writes that part of southwest Alaska (e.g. Aniak)
  429: # switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
  430: # and another part (e.g. Akiak) made the same switch five weeks later.
  431: #
  432: # From David Flater (2004-11-09):
  433: # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska
  434: # Historic Preservation Commission, provided this information, which
  435: # suggests that Unalaska deviated from statutory time from early 1967
  436: # possibly until 1983:
  437: #
  438: #  Minutes of the Unalaska City Council Meeting, January 10, 1967:
  439: #  "Except for St. Paul and Akutan, Unalaska is the only important
  440: #  location not on Alaska Standard Time.  The following resolution was
  441: #  made by William Robinson and seconded by Henry Swanson:  Be it
  442: #  resolved that the City of Unalaska hereby goes to Alaska Standard
  443: #  Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday,
  444: #  January 14, Alaska Standard Time.)  This resolution was passed with
  445: #  three votes for and one against."
  446: 
  447: # Hawaii
  448: #
  449: # From Arthur David Olson:
  450: # And then there's Hawaii.
  451: # DST was observed for one day in 1933;
  452: # standard time was changed by half an hour in 1947;
  453: # it's always standard as of 1986.
  454: #
  455: # From Paul Eggert:
  456: # Shanks says the 1933 experiment lasted for three weeks.  Go with Shanks.
  457: #
  458: Zone Pacific/Honolulu	-10:31:26 -	LMT	1900 Jan  1 12:00
  459: 			-10:30	-	HST	1933 Apr 30 2:00
  460: 			-10:30	1:00	HDT	1933 May 21 2:00
  461: 			-10:30	US	H%sT	1947 Jun  8 2:00
  462: 			-10:00	-	HST
  463: 
  464: # Now we turn to US areas that have diverged from the consensus since 1970.
  465: 
  466: # Arizona mostly uses MST.
  467: 
  468: # From Paul Eggert (2002-10-20):
  469: #
  470: # The information in the rest of this paragraph is derived from the
  471: # <a href="http://www.dlapr.lib.az.us/links/daylight.htm">
  472: # Daylight Saving Time web page (2002-01-23)</a> maintained by the
  473: # Arizona State Library, Archives and Public Records.
  474: # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
  475: # time, but by federal law railroads, airlines, bus lines, military
  476: # personnel, and some engaged in interstate commerce continued to
  477: # observe war (i.e., daylight saving) time.  The 1944-03-17 Phoenix
  478: # Gazette says that was the date the law changed, and that 04-01 was
  479: # the date the state's clocks would change.  In 1945 the State of
  480: # Arizona used standard time all year, again with exceptions only as
  481: # mandated by federal law.  Arizona observed DST in 1967, but Arizona
  482: # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
  483: #
  484: # Shanks says the 1944 experiment came to an end on 1944-03-17.
  485: # Go with the Arizona State Library instead.
  486: 
  487: Zone America/Phoenix	-7:28:18 -	LMT	1883 Nov 18 11:31:42
  488: 			-7:00	US	M%sT	1944 Jan  1 00:01
  489: 			-7:00	-	MST	1944 Apr  1 00:01
  490: 			-7:00	US	M%sT	1944 Oct  1 00:01
  491: 			-7:00	-	MST	1967
  492: 			-7:00	US	M%sT	1968 Mar 21
  493: 			-7:00	-	MST
  494: # From Arthur David Olson (1988-02-13):
  495: # A writer from the Inter Tribal Council of Arizona, Inc.,
  496: # notes in private correspondence dated 1987-12-28 that "Presently, only the
  497: # Navajo Nation participates in the Daylight Saving Time policy, due to its
  498: # large size and location in three states."  (The "only" means that other
  499: # tribal nations don't use DST.)
  500: 
  501: Link America/Denver America/Shiprock
  502: 
  503: # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
  504: # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
  505: # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
  506: # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
  507: # Teton, Twin Falls, Valley, Washington counties) and eastern Oregon
  508: # switched four weeks late in 1974.
  509: #
  510: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  511: Zone America/Boise	-7:44:49 -	LMT	1883 Nov 18 12:15:11
  512: 			-8:00	US	P%sT	1923 May 13 2:00
  513: 			-7:00	US	M%sT	1974
  514: 			-7:00	-	MST	1974 Feb  3 2:00
  515: 			-7:00	US	M%sT
  516: 
  517: # Indiana
  518: #
  519: # For a map of Indiana's time zone regions, see:
  520: # <a href="http://www.mccsc.edu/time.html">
  521: # What time is it in Indiana?
  522: # </a> (2005-05-03)
  523: #
  524: # From Paul Eggert (2005-08-22):
  525: # Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
  526: # with the following exceptions:
  527: #
  528: # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
  529: #   Vandenburgh, and Warrick counties have been like America/Chicago.
  530: #
  531: # - Dearborn and Ohio counties have been like America/New_York.
  532: #
  533: # - Clark, Floyd, and Harrison counties have been like
  534: #   America/Kentucky/Louisville.
  535: #
  536: # - Crawford, Starke, and Switzerland counties have their own time zone
  537: #   histories as noted below.
  538: #
  539: # Shanks partitions Indiana into 345 regions, each with its own time history,
  540: # and writes ``Even newspaper reports present contradictory information.''
  541: # Fortunately, most of the complexity occurred before our cutoff date of 1970.
  542: #
  543: # Other than Indianapolis, the Indiana place names are so nondescript
  544: # that they would be ambiguous if we left them at the `America' level.
  545: # So we reluctantly put them all in a subdirectory `America/Indiana'.
  546: 
  547: # From Paul Eggert (2005-08-16):
  548: # http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006,
  549: # and that many counties may switch either to Central or to Eastern time.
  550: # The county-by-county decisions have not been made yet, so for now assume
  551: # that no counties will switch: this assumption is most likely wrong,
  552: # but it's the best we can do for now.
  553: 
  554: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
  555: Rule Indianapolis 1941	only	-	Jun	22	2:00	1:00	D
  556: Rule Indianapolis 1941	1954	-	Sep	lastSun	2:00	0	S
  557: Rule Indianapolis 1946	1954	-	Apr	lastSun	2:00	1:00	D
  558: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  559: Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22
  560: 			-6:00	US	C%sT	1920
  561: 			-6:00 Indianapolis C%sT	1942
  562: 			-6:00	US	C%sT	1946
  563: 			-6:00 Indianapolis C%sT	1955 Apr 24 2:00
  564: 			-5:00	-	EST	1957 Sep 29 2:00
  565: 			-6:00	-	CST	1958 Apr 27 2:00
  566: 			-5:00	-	EST	1969
  567: 			-5:00	US	E%sT	1971
  568: 			-5:00	-	EST	2006
  569: 			-5:00	US	E%sT
  570: #
  571: # Part of Crawford County, Indiana, last observed DST in 1975,
  572: # and left its clocks alone in 1974.
  573: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
  574: Rule	Marengo	1951	only	-	Apr	lastSun	2:00	1:00	D
  575: Rule	Marengo	1951	only	-	Sep	lastSun	2:00	0	S
  576: Rule	Marengo	1954	1960	-	Apr	lastSun	2:00	1:00	D
  577: Rule	Marengo	1954	1960	-	Sep	lastSun	2:00	0	S
  578: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  579: Zone America/Indiana/Marengo -5:45:23 -	LMT	1883 Nov 18 12:14:37
  580: 			-6:00	US	C%sT	1951
  581: 			-6:00	Marengo	C%sT	1961 Apr 30 2:00
  582: 			-5:00	-	EST	1969
  583: 			-5:00	US	E%sT	1974 Jan  6 2:00
  584: 			-6:00	1:00	CDT	1974 Oct 27 2:00
  585: 			-5:00	US	E%sT	1976
  586: 			-5:00	-	EST	2006
  587: 			-5:00	US	E%sT
  588: #
  589: # Starke County, Indiana
  590: # From Arthur David Olson (1991-10-28):
  591: # An article on page A3 of the Sunday, 1991-10-27 Washington Post
  592: # notes that Starke County switched from Central time to Eastern time as of
  593: # 1991-10-27.
  594: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
  595: Rule	Starke	1947	1961	-	Apr	lastSun	2:00	1:00	D
  596: Rule	Starke	1947	1954	-	Sep	lastSun	2:00	0	S
  597: Rule	Starke	1955	1956	-	Oct	lastSun	2:00	0	S
  598: Rule	Starke	1957	1958	-	Sep	lastSun	2:00	0	S
  599: Rule	Starke	1959	1961	-	Oct	lastSun	2:00	0	S
  600: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  601: Zone America/Indiana/Knox -5:46:30 -	LMT	1883 Nov 18 12:13:30
  602: 			-6:00	US	C%sT	1947
  603: 			-6:00	Starke	C%sT	1962 Apr 29 2:00
  604: 			-5:00	-	EST	1963 Oct 27 2:00
  605: 			-6:00	US	C%sT	1991 Oct 27 2:00
  606: 			-5:00	-	EST	2006
  607: 			-5:00	US	E%sT
  608: #
  609: # Switzerland County, Indiana, last observed DST in 1972.
  610: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  611: Zone America/Indiana/Vevay -5:40:16 -	LMT	1883 Nov 18 12:19:44
  612: 			-6:00	US	C%sT	1954 Apr 25 2:00
  613: 			-5:00	-	EST	1969
  614: 			-5:00	US	E%sT	1973
  615: 			-5:00	-	EST	2006
  616: 			-5:00	US	E%sT
  617: 
  618: # Part of Kentucky left its clocks alone in 1974.
  619: # This also includes Clark, Floyd, and Harrison counties in Indiana.
  620: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
  621: Rule Louisville	1921	only	-	May	1	2:00	1:00	D
  622: Rule Louisville	1921	only	-	Sep	1	2:00	0	S
  623: Rule Louisville	1941	1961	-	Apr	lastSun	2:00	1:00	D
  624: Rule Louisville	1941	only	-	Sep	lastSun	2:00	0	S
  625: Rule Louisville	1946	only	-	Jun	2	2:00	0	S
  626: Rule Louisville	1950	1955	-	Sep	lastSun	2:00	0	S
  627: Rule Louisville	1956	1960	-	Oct	lastSun	2:00	0	S
  628: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  629: Zone America/Kentucky/Louisville -5:43:02 -	LMT	1883 Nov 18 12:16:58
  630: 			-6:00	US	C%sT	1921
  631: 			-6:00 Louisville C%sT	1942
  632: 			-6:00	US	C%sT	1946
  633: 			-6:00 Louisville C%sT	1961 Jul 23 2:00
  634: 			-5:00	-	EST	1968
  635: 			-5:00	US	E%sT	1974 Jan  6 2:00
  636: 			-6:00	1:00	CDT	1974 Oct 27 2:00
  637: 			-5:00	US	E%sT
  638: #
  639: # Wayne, Clinton, and Russell Counties, Kentucky
  640: #
  641: # From
  642: # <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml">
  643: # Lake Cumberland LIFE
  644: # </a> (1999-01-29) via WKYM-101.7:
  645: # Clinton County has joined Wayne County in asking the DoT to change from
  646: # the Central to the Eastern time zone....  The Wayne County government made
  647: # the same request in December.  And while Russell County officials have not
  648: # taken action, the majority of respondents to a poll conducted there in
  649: # August indicated they would like to change to "fast time" also.
  650: # The three Lake Cumberland counties are the farthest east of any U.S.
  651: # location in the Central time zone.
  652: #
  653: # From Rich Wales (2000-08-29):
  654: # After prolonged debate, and despite continuing deep differences of opinion,
  655: # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
  656: # (-0500) time.  They won't "fall back" this year.  See Sara Shipley,
  657: # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
  658: #
  659: # From Paul Eggert (2001-07-16):
  660: # The final rule was published in the
  661: # <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22">
  662: # Federal Register 65, 160 (2000-08-17), page 50154-50158.
  663: # </a>
  664: #
  665: Zone America/Kentucky/Monticello -5:39:24 - LMT	1883 Nov 18 12:20:36
  666: 			-6:00	US	C%sT	1946
  667: 			-6:00	-	CST	1968
  668: 			-6:00	US	C%sT	2000 Oct 29  2:00
  669: 			-5:00	US	E%sT
  670: 
  671: 
  672: # From Rives McDow (2000-08-30):
  673: # Here ... are all the changes in the US since 1985.
  674: # Kearny County, KS (put all of county on central;
  675: #	previously split between MST and CST) ... 1990-10
  676: # Starke County, IN (from CST to EST) ... 1991-10
  677: # Oliver County, ND (from MST to CST) ... 1992-10
  678: # West Wendover, NV (from PST TO MST) ... 1999-10
  679: # Wayne County, KY (from CST to EST) ... 2000-10
  680: #
  681: # From Paul Eggert (2001-07-17):
  682: # We don't know where the line used to be within Kearny County, KS,
  683: # so omit that change for now.
  684: # See America/Indiana/Knox for the Starke County, IN change.
  685: # See America/North_Dakota/Center for the Oliver County, ND change.
  686: # West Wendover, NV officially switched from Pacific to mountain time on
  687: # 1999-10-31.  See the
  688: # <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15">
  689: # Federal Register 64, 203 (1999-10-21), page 56705-56707.
  690: # </a>
  691: # However, the Federal Register says that West Wendover already operated
  692: # on mountain time, and the rule merely made this official;
  693: # hence a separate tz entry is not needed.
  694: 
  695: # Michigan
  696: #
  697: # From Bob Devine (1988-01-28):
  698: # Michigan didn't observe DST from 1968 to 1973.
  699: #
  700: # From Paul Eggert (1999-03-31):
  701: # Shanks writes that Michigan started using standard time on 1885-09-18,
  702: # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01)
  703: # that Detroit kept
  704: #
  705: #	local time until 1900 when the City Council decreed that clocks should
  706: #	be put back twenty-eight minutes to Central Standard Time.  Half the
  707: #	city obeyed, half refused.  After considerable debate, the decision
  708: #	was rescinded and the city reverted to Sun time.  A derisive offer to
  709: #	erect a sundial in front of the city hall was referred to the
  710: #	Committee on Sewers.  Then, in 1905, Central time was adopted
  711: #	by city vote.
  712: #
  713: # This story is too entertaining to be false, so go with Howse over Shanks.
  714: #
  715: # From Paul Eggert (2001-03-06):
  716: # Garland (1927) writes ``Cleveland and Detroit advanced their clocks
  717: # one hour in 1914.''  This change is not in Shanks.  We have no more
  718: # info, so omit this for now.
  719: #
  720: # Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
  721: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
  722: Rule	Detroit	1948	only	-	Apr	lastSun	2:00	1:00	D
  723: Rule	Detroit	1948	only	-	Sep	lastSun	2:00	0	S
  724: Rule	Detroit	1967	only	-	Jun	14	2:00	1:00	D
  725: Rule	Detroit	1967	only	-	Oct	lastSun	2:00	0	S
  726: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  727: Zone America/Detroit	-5:32:11 -	LMT	1905
  728: 			-6:00	-	CST	1915 May 15 2:00
  729: 			-5:00	-	EST	1942
  730: 			-5:00	US	E%sT	1946
  731: 			-5:00	Detroit	E%sT	1973
  732: 			-5:00	US	E%sT	1975
  733: 			-5:00	-	EST	1975 Apr 27 2:00
  734: 			-5:00	US	E%sT
  735: #
  736: # The Michigan border with Wisconsin switched from EST to CST/CDT in 1973.
  737: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
  738: Rule Menominee	1946	only	-	Apr	lastSun	2:00	1:00	D
  739: Rule Menominee	1946	only	-	Sep	lastSun	2:00	0	S
  740: Rule Menominee	1966	only	-	Apr	lastSun	2:00	1:00	D
  741: Rule Menominee	1966	only	-	Oct	lastSun	2:00	0	S
  742: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  743: Zone America/Menominee	-5:50:27 -	LMT	1885 Sep 18 12:00
  744: 			-6:00	US	C%sT	1946
  745: 			-6:00 Menominee	C%sT	1969 Apr 27 2:00
  746: 			-5:00	-	EST	1973 Apr 29 2:00
  747: 			-6:00	US	C%sT
  748: 
  749: # Navassa
  750: # administered by the US Fish and Wildlife Service
  751: # claimed by US under the provisions of the 1856 Guano Islands Act
  752: # also claimed by Haiti
  753: # occupied 1857/1900 by the Navassa Phosphate Co
  754: # US lighthouse 1917/1996-09
  755: # currently uninhabited
  756: # see Mark Fineman, ``An Isle Rich in Guano and Discord'',
  757: # _Los Angeles Times_ (1998-11-10), A1, A10; it cites
  758: # Jimmy Skaggs, _The Great Guano Rush_ (1994).
  759: 
  760: ################################################################################
  761: 
  762: 
  763: # From Paul Eggert (1999-10-29):
  764: # A good source for time zone historical data outside the US is
  765: # Thomas G. Shanks, The International Atlas (5th edition),
  766: # San Diego: ACS Publications, Inc. (1999).
  767: #
  768: # Gwillim Law writes that a good source
  769: # for recent time zone data is the International Air Transport
  770: # Association's Standard Schedules Information Manual (IATA SSIM),
  771: # published semiannually.  Law sent in several helpful summaries
  772: # of the IATA's data after 1990.
  773: #
  774: # Except where otherwise noted, Shanks is the source for entries through 1990,
  775: # and IATA SSIM is the source for entries after 1990.
  776: #
  777: # Other sources occasionally used include:
  778: #
  779: #	Edward W. Whitman, World Time Differences,
  780: #	Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
  781: #	which I found in the UCLA library.
  782: #
  783: #	<a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf">
  784: #	William Willett, The Waste of Daylight, 19th edition
  785: #	</a> (1914-03)
  786: #
  787: # See the `europe' file for Greenland.
  788: 
  789: # Canada
  790: 
  791: # From Alain LaBont<e'> (1994-11-14):
  792: # I post here the time zone abbreviations standardized in Canada
  793: # for both English and French in the CAN/CSA-Z234.4-89 standard....
  794: #
  795: #	UTC	Standard time	Daylight savings time
  796: #	offset	French	English	French	English
  797: #	-2:30	-	-	HAT	NDT
  798: #	-3	-	-	HAA	ADT
  799: #	-3:30	HNT	NST	-	-
  800: #	-4	HNA	AST	HAE	EDT
  801: #	-5	HNE	EST	HAC	CDT
  802: #	-6	HNC	CST	HAR	MDT
  803: #	-7	HNR	MST	HAP	PDT
  804: #	-8	HNP	PST	HAY	YDT
  805: #	-9	HNY	YST	-	-
  806: #
  807: #	HN: Heure Normale	ST: Standard Time
  808: #	HA: Heure Avanc<e'>e	DT: Daylight saving Time
  809: #
  810: #	A: de l'Atlantique	Atlantic
  811: #	C: du Centre		Central
  812: #	E: de l'Est		Eastern
  813: #	M:			Mountain
  814: #	N:			Newfoundland
  815: #	P: du Pacifique		Pacific
  816: #	R: des Rocheuses
  817: #	T: de Terre-Neuve
  818: #	Y: du Yukon		Yukon
  819: #
  820: # From Paul Eggert (1994-11-22):
  821: # Alas, this sort of thing must be handled by localization software.
  822: 
  823: # Unless otherwise specified, the data for Canada are all from Shanks.
  824: 
  825: # From Paul Eggert (2005-12-21):
  826: # H. David Matthews and Mary Vincent's map
  827: # <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp">
  828: # "It's about TIME", _Canadian Geographic_ (September-October 1998)
  829: # </a> contains detailed boundaries for regions observing nonstandard
  830: # time and daylight saving time arrangements in Canada circa 1998.
  831: #
  832: # INMS, the Institute for National Measurement Standards in Ottawa, has <a
  833: # href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php">
  834: # information about standard and daylight saving time zones in Canada.
  835: # </a> (updated periodically).
  836: # Its unofficial information is often taken from Matthews and Vincent.
  837: #
  838: # CBC News reported that Ontario and Manitoba have announced plans to
  839: # follow the US change, and that Nova Scotia is considering it; see
  840: # <http://www.cbc.ca/news/background/daylightsavingtime/> (2005-10-21).
  841: # CBC news also reported that Prince Edward Island is the first
  842: # province in Atlantic Canada to follow the US change, and that Quebec
  843: # had agreed; see <http://www.cbc.ca/pei/story/pe_daylight_20051207.html>
  844: # (2005-12-07).
  845: #
  846: # To reflect all this, the Canada and Winn rules have been adjusted to
  847: # agree with the 2007 US change.  This means we assume most of Canada
  848: # will fall into line.  However, Alberta, British Columbia,
  849: # Newfoundland, Northwest Territories, and Yukon already have separate
  850: # rules in our database, so for now we'll leave them alone, which
  851: # means that we currently assume these regions will not change their
  852: # rules and will disagree with the US starting in 2007.  This
  853: # assumption is probably incorrect, with the possible exception of
  854: # Newfoundland.  We plan to adjust the Edm, Vanc, StJohns, and NT_YK
  855: # rules as the corresponding provinces make their announcements.
  856: 
  857: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
  858: Rule	Canada	1918	only	-	Apr	14	2:00	1:00	D
  859: Rule	Canada	1918	only	-	Oct	31	2:00	0	S
  860: Rule	Canada	1942	only	-	Feb	 9	2:00	1:00	W # War
  861: Rule	Canada	1945	only	-	Aug	14	23:00u	1:00	P # Peace
  862: Rule	Canada	1945	only	-	Sep	30	2:00	0	S
  863: Rule	Canada	1974	1986	-	Apr	lastSun	2:00	1:00	D
  864: Rule	Canada	1974	2006	-	Oct	lastSun	2:00	0	S
  865: Rule	Canada	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
  866: Rule	Canada	2007	max	-	Mar	Sun>=8	2:00	1:00	D
  867: Rule	Canada	2007	max	-	Nov	Sun>=1	2:00	0	S
  868: 
  869: 
  870: # Newfoundland (and far southeast Labrador)
  871: 
  872: # From Paul Eggert (2000-10-02):
  873: # Matthews and Vincent (1998) write that Labrador should use NST/NDT,
  874: # but the only part of Labrador that follows the rules is the
  875: # southeast corner, including Port Hope Simpson and Mary's Harbour,
  876: # but excluding, say, Black Tickle.
  877: 
  878: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
  879: Rule	StJohns	1917	only	-	Apr	 8	2:00	1:00	D
  880: Rule	StJohns	1917	only	-	Sep	17	2:00	0	S
  881: # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks.
  882: Rule	StJohns	1919	only	-	May	 5	23:00	1:00	D
  883: Rule	StJohns	1919	only	-	Aug	12	23:00	0	S
  884: # For 1931-1935 Whitman gives Apr same date; go with Shanks.
  885: Rule	StJohns	1920	1935	-	May	Sun>=1	23:00	1:00	D
  886: Rule	StJohns	1920	1935	-	Oct	lastSun	23:00	0	S
  887: # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks.
  888: Rule	StJohns	1936	1941	-	May	Mon>=9	0:00	1:00	D
  889: Rule	StJohns	1936	1941	-	Oct	Mon>=2	0:00	0	S
  890: # Whitman gives the following transitions:
  891: # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07
  892: # but go with Shanks and assume they used Canadian rules.
  893: # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
  894: # Apr 30 - Sep 24; go with Shanks.
  895: Rule	StJohns	1946	1950	-	May	Sun>=8	2:00	1:00	D
  896: Rule	StJohns	1946	1950	-	Oct	Sun>=2	2:00	0	S
  897: Rule	StJohns	1951	1986	-	Apr	lastSun	2:00	1:00	D
  898: Rule	StJohns	1951	1959	-	Sep	lastSun	2:00	0	S
  899: Rule	StJohns	1960	1986	-	Oct	lastSun	2:00	0	S
  900: # From Paul Eggert (2000-10-02):
  901: # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
  902: # at 00:01 local time.  For now, assume it started in 1987.
  903: Rule	StJohns	1987	only	-	Apr	Sun>=1	0:01	1:00	D
  904: Rule	StJohns	1987	max	-	Oct	lastSun	0:01	0	S
  905: Rule	StJohns	1988	only	-	Apr	Sun>=1	0:01	2:00	DD
  906: Rule	StJohns	1989	max	-	Apr	Sun>=1	0:01	1:00	D
  907: # St John's has an apostrophe, but Posix file names can't have apostrophes.
  908: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  909: Zone America/St_Johns	-3:30:52 -	LMT	1884
  910: 			-3:30:52 StJohns N%sT	1918
  911: 			-3:30:52 Canada	N%sT	1919
  912: 			-3:30:52 StJohns N%sT	1935 Mar 30
  913: 			-3:30	StJohns	N%sT	1942 May 11
  914: 			-3:30	Canada	N%sT	1946
  915: 			-3:30	StJohns	N%sT
  916: 
  917: # most of east Labrador
  918: 
  919: # The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'.
  920: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  921: Zone America/Goose_Bay	-4:01:40 -	LMT	1884 # Happy Valley-Goose Bay
  922: 			-3:30:52 -	NST	1918
  923: 			-3:30:52 Canada N%sT	1919
  924: 			-3:30:52 -	NST	1935 Mar 30
  925: 			-3:30	-	NST	1936
  926: 			-3:30	StJohns	N%sT	1942 May 11
  927: 			-3:30	Canada	N%sT	1946
  928: 			-3:30	StJohns	N%sT	1966 Mar 15 2:00
  929: 			-4:00	StJohns	A%sT
  930: 
  931: 
  932: # west Labrador, New Brunswick, Nova Scotia, Prince Edward I
  933: 
  934: # From Paul Eggert (1996-06-12):
  935: # Shanks writes that since 1970 most of this region has been like Halifax.
  936: # Many locales did not observe peacetime DST until 1972;
  937: # Glace Bay, NS is the largest that we know of.
  938: # Shanks also writes that Liverpool, NS was the only town in Canada to observe
  939: # DST in 1971 but not 1970; for now we'll assume this is a typo.
  940: 
  941: # From Paul Eggert (2000-10-02):
  942: # INMS (2000-09-12) says that, since 1988 at least, New Brunswick switches
  943: # at 00:01 local time.  FIXME: verify and create a new Zone for this.
  944: 
  945: 
  946: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
  947: Rule Halifax	1916	only	-	Apr	 1	0:00	1:00	D
  948: Rule Halifax	1916	only	-	Oct	 1	0:00	0	S
  949: Rule Halifax	1920	only	-	May	 9	0:00	1:00	D
  950: Rule Halifax	1920	only	-	Aug	29	0:00	0	S
  951: Rule Halifax	1921	only	-	May	 6	0:00	1:00	D
  952: Rule Halifax	1921	1922	-	Sep	 5	0:00	0	S
  953: Rule Halifax	1922	only	-	Apr	30	0:00	1:00	D
  954: Rule Halifax	1923	1925	-	May	Sun>=1	0:00	1:00	D
  955: Rule Halifax	1923	only	-	Sep	 4	0:00	0	S
  956: Rule Halifax	1924	only	-	Sep	15	0:00	0	S
  957: Rule Halifax	1925	only	-	Sep	28	0:00	0	S
  958: Rule Halifax	1926	only	-	May	16	0:00	1:00	D
  959: Rule Halifax	1926	only	-	Sep	13	0:00	0	S
  960: Rule Halifax	1927	only	-	May	 1	0:00	1:00	D
  961: Rule Halifax	1927	only	-	Sep	26	0:00	0	S
  962: Rule Halifax	1928	1931	-	May	Sun>=8	0:00	1:00	D
  963: Rule Halifax	1928	only	-	Sep	 9	0:00	0	S
  964: Rule Halifax	1929	only	-	Sep	 3	0:00	0	S
  965: Rule Halifax	1930	only	-	Sep	15	0:00	0	S
  966: Rule Halifax	1931	1932	-	Sep	Mon>=24	0:00	0	S
  967: Rule Halifax	1932	only	-	May	 1	0:00	1:00	D
  968: Rule Halifax	1933	only	-	Apr	30	0:00	1:00	D
  969: Rule Halifax	1933	only	-	Oct	 2	0:00	0	S
  970: Rule Halifax	1934	only	-	May	20	0:00	1:00	D
  971: Rule Halifax	1934	only	-	Sep	16	0:00	0	S
  972: Rule Halifax	1935	only	-	Jun	 2	0:00	1:00	D
  973: Rule Halifax	1935	only	-	Sep	30	0:00	0	S
  974: Rule Halifax	1936	only	-	Jun	 1	0:00	1:00	D
  975: Rule Halifax	1936	only	-	Sep	14	0:00	0	S
  976: Rule Halifax	1937	1938	-	May	Sun>=1	0:00	1:00	D
  977: Rule Halifax	1937	1941	-	Sep	Mon>=24	0:00	0	S
  978: Rule Halifax	1939	only	-	May	28	0:00	1:00	D
  979: Rule Halifax	1940	1941	-	May	Sun>=1	0:00	1:00	D
  980: Rule Halifax	1946	1949	-	Sep	lastSun	2:00	0	S
  981: Rule Halifax	1946	1949	-	Apr	lastSun	2:00	1:00	D
  982: Rule Halifax	1951	1954	-	Sep	lastSun	2:00	0	S
  983: Rule Halifax	1951	1954	-	Apr	lastSun	2:00	1:00	D
  984: Rule Halifax	1956	1959	-	Sep	lastSun	2:00	0	S
  985: Rule Halifax	1956	1959	-	Apr	lastSun	2:00	1:00	D
  986: Rule Halifax	1962	1973	-	Apr	lastSun	2:00	1:00	D
  987: Rule Halifax	1962	1973	-	Oct	lastSun	2:00	0	S
  988: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  989: Zone America/Halifax	-4:14:24 -	LMT	1902 Jun 15
  990: 			-4:00	Halifax	A%sT	1918
  991: 			-4:00	Canada	A%sT	1919
  992: 			-4:00	Halifax	A%sT	1942 Feb  9 2:00s
  993: 			-4:00	Canada	A%sT	1946
  994: 			-4:00	Halifax	A%sT	1974
  995: 			-4:00	Canada	A%sT
  996: Zone America/Glace_Bay	-3:59:48 -	LMT	1902 Jun 15
  997: 			-4:00	Canada	A%sT	1953
  998: 			-4:00	Halifax	A%sT	1954
  999: 			-4:00	-	AST	1972
 1000: 			-4:00	Halifax	A%sT	1974
 1001: 			-4:00	Canada	A%sT
 1002: 
 1003: 
 1004: # Ontario, Quebec
 1005: 
 1006: # From Paul Eggert (1996-06-12):
 1007: # Shanks writes that since 1970 most of Ontario has been like Toronto,
 1008: # and most of Quebec has been like Montreal.
 1009: # Thunder Bay skipped DST in 1973.
 1010: # Many smaller locales did not observe peacetime DST until 1974;
 1011: # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
 1012: # Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
 1013: 
 1014: # From Mark Brader (2003-07-26):
 1015: # [According to the Toronto Star] Orillia, Ontario, adopted DST
 1016: # effective Saturday, 1912-06-22, 22:00; the article mentions that
 1017: # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
 1018: # have already done so.  In Orillia DST was to run until Saturday,
 1019: # 1912-08-31 (no time mentioned), but it was met with considerable
 1020: # hostility from certain segments of the public, and was revoked after
 1021: # only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but
 1022: # presumably that should be -07-06.  (1912-06-19, -07-12; also letters
 1023: # earlier in June).
 1024: #
 1025: # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).
 1026: 
 1027: # From Paul Eggert (1997-10-17):
 1028: # Mark Brader writes that an article in the 1997-10-14 Toronto Star
 1029: # says that Atikokan, Ontario currently does not observe DST,
 1030: # but will vote on 11-10 whether to use EST/EDT.
 1031: # He also writes that the
 1032: # <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html">
 1033: # Ontario Time Act (1990, Chapter T.9)
 1034: # </a>
 1035: # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.
 1036: # Officially Atikokan is therefore on CST/CDT, and most likely this report
 1037: # concerns a non-official time observed as a matter of local practice.
 1038: # For what it's worth, Shanks says that Atikokan has agreed with
 1039: # Rainy River ever since standard time was introduced.
 1040: 
 1041: # From Paul Eggert (2000-10-02):
 1042: # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and
 1043: # New Osnaburgh observe CST all year, that Big Trout Lake observes
 1044: # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in
 1045: # violation of the official Ontario rules.
 1046: # They also write that Quebec east of the -63 meridian is supposed to
 1047: # observe AST, but residents as far east as Natashquan use EST/EDT,
 1048: # and residents east of Natashquan use AST.
 1049: # We probably need Zones for far east Quebec and for Atikokan,
 1050: # but we don't know when their practices started.
 1051: 
 1052: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1053: Rule	Mont	1917	only	-	Mar	25	2:00	1:00	D
 1054: Rule	Mont	1917	only	-	Apr	24	0:00	0	S
 1055: Rule	Mont	1919	only	-	Mar	31	2:30	1:00	D
 1056: Rule	Mont	1919	only	-	Oct	25	2:30	0	S
 1057: Rule	Mont	1920	only	-	May	 2	2:30	1:00	D
 1058: Rule	Mont	1920	1922	-	Oct	Sun>=1	2:30	0	S
 1059: Rule	Mont	1921	only	-	May	 1	2:00	1:00	D
 1060: Rule	Mont	1922	only	-	Apr	30	2:00	1:00	D
 1061: Rule	Mont	1924	only	-	May	17	2:00	1:00	D
 1062: Rule	Mont	1924	1926	-	Sep	lastSun	2:30	0	S
 1063: Rule	Mont	1925	1926	-	May	Sun>=1	2:00	1:00	D
 1064: # The 1927-to-1937 rules can be expressed more simply as
 1065: # Rule	Mont	1927	1937	-	Apr	lastSat	24:00	1:00	D
 1066: # Rule	Mont	1927	1937	-	Sep	lastSat	24:00	0	S
 1067: # The rules below avoid use of 24:00
 1068: # (which pre-1998 versions of zic cannot handle).
 1069: Rule	Mont	1927	only	-	May	1	0:00	1:00	D
 1070: Rule	Mont	1927	1932	-	Sep	lastSun	0:00	0	S
 1071: Rule	Mont	1928	1931	-	Apr	lastSun	0:00	1:00	D
 1072: Rule	Mont	1932	only	-	May	1	0:00	1:00	D
 1073: Rule	Mont	1933	1940	-	Apr	lastSun	0:00	1:00	D
 1074: Rule	Mont	1933	only	-	Oct	1	0:00	0	S
 1075: Rule	Mont	1934	1939	-	Sep	lastSun	0:00	0	S
 1076: Rule	Mont	1946	1973	-	Apr	lastSun	2:00	1:00	D
 1077: Rule	Mont	1945	1948	-	Sep	lastSun	2:00	0	S
 1078: Rule	Mont	1949	1950	-	Oct	lastSun	2:00	0	S
 1079: Rule	Mont	1951	1956	-	Sep	lastSun	2:00	0	S
 1080: Rule	Mont	1957	1973	-	Oct	lastSun	2:00	0	S
 1081: 
 1082: Rule	Toronto	1919	only	-	Mar	30	23:30	1:00	D
 1083: Rule	Toronto	1919	only	-	Oct	26	0:00	0	S
 1084: Rule	Toronto	1920	only	-	May	 2	2:00	1:00	D
 1085: Rule	Toronto	1920	only	-	Sep	26	0:00	0	S
 1086: Rule	Toronto	1921	only	-	May	15	2:00	1:00	D
 1087: Rule	Toronto	1921	only	-	Sep	15	2:00	0	S
 1088: Rule	Toronto	1922	1923	-	May	Sun>=8	2:00	1:00	D
 1089: # Shanks says 1923-09-19; assume it's a typo and that "-16" was meant.
 1090: Rule	Toronto	1922	1926	-	Sep	Sun>=15	2:00	0	S
 1091: Rule	Toronto	1924	1927	-	May	Sun>=1	2:00	1:00	D
 1092: # The 1927-to-1939 rules can be expressed more simply as
 1093: # Rule	Toronto	1927	1937	-	Sep	Sun>=25	2:00	0	S
 1094: # Rule	Toronto	1928	1937	-	Apr	Sun>=25	2:00	1:00	D
 1095: # Rule	Toronto	1938	1940	-	Apr	lastSun	2:00	1:00	D
 1096: # Rule	Toronto	1938	1939	-	Sep	lastSun	2:00	0	S
 1097: # The rules below avoid use of Sun>=25
 1098: # (which pre-2004 versions of zic cannot handle).
 1099: Rule	Toronto	1927	1932	-	Sep	lastSun	2:00	0	S
 1100: Rule	Toronto	1928	1931	-	Apr	lastSun	2:00	1:00	D
 1101: Rule	Toronto	1932	only	-	May	1	2:00	1:00	D
 1102: Rule	Toronto	1933	1940	-	Apr	lastSun	2:00	1:00	D
 1103: Rule	Toronto	1933	only	-	Oct	1	2:00	0	S
 1104: Rule	Toronto	1934	1939	-	Sep	lastSun	2:00	0	S
 1105: Rule	Toronto	1945	1946	-	Sep	lastSun	2:00	0	S
 1106: Rule	Toronto	1946	only	-	Apr	lastSun	2:00	1:00	D
 1107: Rule	Toronto	1947	1949	-	Apr	lastSun	0:00	1:00	D
 1108: Rule	Toronto	1947	1948	-	Sep	lastSun	0:00	0	S
 1109: Rule	Toronto	1949	only	-	Nov	lastSun	0:00	0	S
 1110: Rule	Toronto	1950	1973	-	Apr	lastSun	2:00	1:00	D
 1111: Rule	Toronto	1950	only	-	Nov	lastSun	2:00	0	S
 1112: Rule	Toronto	1951	1956	-	Sep	lastSun	2:00	0	S
 1113: # Shanks says Toronto ended DST a week early in 1971, namely on 1971-10-24,
 1114: # but Mark Brader wrote (2003-05-31) that he checked the 1971-10-30 issue
 1115: # of the Toronto Star, and it said that DST ended 1971-10-31 as usual.
 1116: Rule	Toronto	1957	1973	-	Oct	lastSun	2:00	0	S
 1117: 
 1118: # From Paul Eggert (2003-07-27):
 1119: # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and
 1120: # Port Arthur, Ontario, the principle of the Bill has been in
 1121: # operation for the past three years, and in the City of Moose Jaw,
 1122: # Saskatchewan, for one year."
 1123: 
 1124: # From David Bryan via Tory Tronrud, Director/Curator,
 1125: # Thunder Bay Museum (2003-11-12):
 1126: # There is some suggestion, however, that, by-law or not, daylight
 1127: # savings time was being practiced in Fort William and Port Arthur
 1128: # before 1909.... [I]n 1910, the line between the Eastern and Central
 1129: # Time Zones was permanently moved about two hundred miles west to
 1130: # include the Thunder Bay area....  When Canada adopted daylight
 1131: # savings time in 1916, Fort William and Port Arthur, having done so
 1132: # already, did not change their clocks....  During the Second World
 1133: # War,... [t]he cities agreed to implement DST during the summer
 1134: # months for the remainder of the war years.
 1135: 
 1136: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1137: Zone America/Montreal	-4:54:16 -	LMT	1884
 1138: 			-5:00	Mont	E%sT	1918
 1139: 			-5:00	Canada	E%sT	1919
 1140: 			-5:00	Mont	E%sT	1942 Feb  9 2:00s
 1141: 			-5:00	Canada	E%sT	1946
 1142: 			-5:00	Mont	E%sT	1974
 1143: 			-5:00	Canada	E%sT
 1144: Zone America/Toronto	-5:17:32 -	LMT	1895
 1145: 			-5:00	Canada	E%sT	1919
 1146: 			-5:00	Toronto	E%sT	1942 Feb  9 2:00s
 1147: 			-5:00	Canada	E%sT	1946
 1148: 			-5:00	Toronto	E%sT	1974
 1149: 			-5:00	Canada	E%sT
 1150: Zone America/Thunder_Bay -5:57:00 -	LMT	1895
 1151: 			-6:00	-	CST	1910
 1152: 			-5:00	-	EST	1942
 1153: 			-5:00	Canada	E%sT	1970
 1154: 			-5:00	Mont	E%sT	1973
 1155: 			-5:00	-	EST	1974
 1156: 			-5:00	Canada	E%sT
 1157: Zone America/Nipigon	-5:53:04 -	LMT	1895
 1158: 			-5:00	Canada	E%sT	1940 Sep 29
 1159: 			-5:00	1:00	EDT	1942 Feb  9 2:00s
 1160: 			-5:00	Canada	E%sT
 1161: Zone America/Rainy_River -6:17:56 -	LMT	1895
 1162: 			-6:00	Canada	C%sT	1940 Sep 29
 1163: 			-6:00	1:00	CDT	1942 Feb  9 2:00s
 1164: 			-6:00	Canada	C%sT
 1165: 
 1166: 
 1167: # Manitoba
 1168: 
 1169: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1170: Rule	Winn	1916	only	-	Apr	23	0:00	1:00	D
 1171: Rule	Winn	1916	only	-	Sep	17	0:00	0	S
 1172: Rule	Winn	1918	only	-	Apr	14	2:00	1:00	D
 1173: Rule	Winn	1918	only	-	Oct	31	2:00	0	S
 1174: Rule	Winn	1937	only	-	May	16	2:00	1:00	D
 1175: Rule	Winn	1937	only	-	Sep	26	2:00	0	S
 1176: Rule	Winn	1942	only	-	Feb	 9	2:00	1:00	W # War
 1177: Rule	Winn	1945	only	-	Aug	14	23:00u	1:00	P # Peace
 1178: Rule	Winn	1945	only	-	Sep	lastSun	2:00	0	S
 1179: Rule	Winn	1946	only	-	May	12	2:00	1:00	D
 1180: Rule	Winn	1946	only	-	Oct	13	2:00	0	S
 1181: Rule	Winn	1947	1949	-	Apr	lastSun	2:00	1:00	D
 1182: Rule	Winn	1947	1949	-	Sep	lastSun	2:00	0	S
 1183: Rule	Winn	1950	only	-	May	 1	2:00	1:00	D
 1184: Rule	Winn	1950	only	-	Sep	30	2:00	0	S
 1185: Rule	Winn	1951	1960	-	Apr	lastSun	2:00	1:00	D
 1186: Rule	Winn	1951	1958	-	Sep	lastSun	2:00	0	S
 1187: Rule	Winn	1959	only	-	Oct	lastSun	2:00	0	S
 1188: Rule	Winn	1960	only	-	Sep	lastSun	2:00	0	S
 1189: Rule	Winn	1963	only	-	Apr	lastSun	2:00	1:00	D
 1190: Rule	Winn	1963	only	-	Sep	22	2:00	0	S
 1191: Rule	Winn	1966	1986	-	Apr	lastSun	2:00	1:00	D
 1192: Rule	Winn	1966	1986	-	Oct	lastSun	2:00	0	S
 1193: Rule	Winn	1987	2006	-	Apr	Sun>=1	2:00s	1:00	D
 1194: # From Paul Eggert (2000-10-02):
 1195: # INMS (2000-09-12) says that, since 1988 at least, Manitoba switches from
 1196: # DST at 03:00 local time.  For now, assume it started in 1987.
 1197: Rule	Winn	1987	2006	-	Oct	lastSun	2:00s	0	S
 1198: Rule	Winn	2007	max	-	Mar	Sun>=8	2:00s	1:00	D
 1199: Rule	Winn	2007	max	-	Nov	Sun>=1	2:00s	0	S
 1200: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1201: Zone America/Winnipeg	-6:28:36 -	LMT	1887 Jul 16
 1202: 			-6:00	Winn	C%sT
 1203: 
 1204: 
 1205: # Saskatchewan
 1206: 
 1207: # From Mark Brader (2003-07-26):
 1208: # The first actual adoption of DST in Canada was at the municipal
 1209: # level.  As the [Toronto] Star put it (1912-06-07), "While people
 1210: # elsewhere have long been talking of legislation to save daylight,
 1211: # the city of Moose Jaw [Saskatchewan] has acted on its own hook."
 1212: # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
 1213: # presumably late evening, as below), and would run until "the end of
 1214: # the summer".  The discrepancy between municipal time and railroad
 1215: # time was noted.
 1216: 
 1217: # From Paul Eggert (2003-07-27):
 1218: # Willett (1914-03) notes that DST "has been in operation ... in the
 1219: # City of Moose Jaw, Saskatchewan, for one year."
 1220: 
 1221: # From Paul Eggert (2000-10-02):
 1222: # Shanks writes that since 1970 most of this region has been like Regina.
 1223: # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
 1224: # Other western towns (e.g. Lloydminster) are like Edmonton.
 1225: # Matthews and Vincent (1998) write that Denare Beach and Creighton
 1226: # are like Winnipeg, in violation of Saskatchewan law.
 1227: 
 1228: # From W. Jones (1992-11-06):
 1229: # The. . .below is based on information I got from our law library, the
 1230: # provincial archives, and the provincial Community Services department.
 1231: # A precise history would require digging through newspaper archives, and
 1232: # since you didn't say what you wanted, I didn't bother.
 1233: #
 1234: # Saskatchewan is split by a time zone meridian (105W) and over the years
 1235: # the boundary became pretty ragged as communities near it reevaluated
 1236: # their affiliations in one direction or the other.  In 1965 a provincial
 1237: # referendum favoured legislating common time practices.
 1238: #
 1239: # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
 1240: # Saskatchewan 1978) was proclaimed, and established that the eastern
 1241: # part of Saskatchewan would use CST year round, that districts in
 1242: # northwest Saskatchewan would by default follow CST but could opt to
 1243: # follow Mountain Time rules (thus 1 hour difference in the winter and
 1244: # zero in the summer), and that districts in southwest Saskatchewan would
 1245: # by default follow MT but could opt to follow CST.
 1246: #
 1247: # It took a few years for the dust to settle (I know one story of a town
 1248: # on one time zone having its school in another, such that a mom had to
 1249: # serve her family lunch in two shifts), but presently it seems that only
 1250: # a few towns on the border with Alberta (e.g. Lloydminster) follow MT
 1251: # rules any more; all other districts appear to have used CST year round
 1252: # since sometime in the 1960s.
 1253: 
 1254: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1255: Rule	Regina	1918	only	-	Apr	14	2:00	1:00	D
 1256: Rule	Regina	1918	only	-	Oct	31	2:00	0	S
 1257: Rule	Regina	1930	1934	-	May	Sun>=1	0:00	1:00	D
 1258: Rule	Regina	1930	1934	-	Oct	Sun>=1	0:00	0	S
 1259: Rule	Regina	1937	1941	-	Apr	Sun>=8	0:00	1:00	D
 1260: Rule	Regina	1937	only	-	Oct	Sun>=8	0:00	0	S
 1261: Rule	Regina	1938	only	-	Oct	Sun>=1	0:00	0	S
 1262: Rule	Regina	1939	1941	-	Oct	Sun>=8	0:00	0	S
 1263: Rule	Regina	1942	only	-	Feb	 9	2:00	1:00	W # War
 1264: Rule	Regina	1945	only	-	Aug	14	23:00u	1:00	P # Peace
 1265: Rule	Regina	1945	only	-	Sep	lastSun	2:00	0	S
 1266: Rule	Regina	1946	only	-	Apr	Sun>=8	2:00	1:00	D
 1267: Rule	Regina	1946	only	-	Oct	Sun>=8	2:00	0	S
 1268: Rule	Regina	1947	1957	-	Apr	lastSun	2:00	1:00	D
 1269: Rule	Regina	1947	1957	-	Sep	lastSun	2:00	0	S
 1270: Rule	Regina	1959	only	-	Apr	lastSun	2:00	1:00	D
 1271: Rule	Regina	1959	only	-	Oct	lastSun	2:00	0	S
 1272: #
 1273: Rule	Swift	1957	only	-	Apr	lastSun	2:00	1:00	D
 1274: Rule	Swift	1957	only	-	Oct	lastSun	2:00	0	S
 1275: Rule	Swift	1959	1961	-	Apr	lastSun	2:00	1:00	D
 1276: Rule	Swift	1959	only	-	Oct	lastSun	2:00	0	S
 1277: Rule	Swift	1960	1961	-	Sep	lastSun	2:00	0	S
 1278: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1279: Zone America/Regina	-6:58:36 -	LMT	1905 Sep
 1280: 			-7:00	Regina	M%sT	1960 Apr lastSun 2:00
 1281: 			-6:00	-	CST
 1282: Zone America/Swift_Current -7:11:20 -	LMT	1905 Sep
 1283: 			-7:00	Canada	M%sT	1946 Apr lastSun 2:00
 1284: 			-7:00	Regina	M%sT	1950
 1285: 			-7:00	Swift	M%sT	1972 Apr lastSun 2:00
 1286: 			-6:00	-	CST
 1287: 
 1288: 
 1289: # Alberta
 1290: 
 1291: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1292: Rule	Edm	1918	1919	-	Apr	Sun>=8	2:00	1:00	D
 1293: Rule	Edm	1918	only	-	Oct	31	2:00	0	S
 1294: Rule	Edm	1919	only	-	May	27	2:00	0	S
 1295: Rule	Edm	1920	1923	-	Apr	lastSun	2:00	1:00	D
 1296: Rule	Edm	1920	only	-	Oct	lastSun	2:00	0	S
 1297: Rule	Edm	1921	1923	-	Sep	lastSun	2:00	0	S
 1298: Rule	Edm	1942	only	-	Feb	 9	2:00	1:00	W # War
 1299: Rule	Edm	1945	only	-	Aug	14	23:00u	1:00	P # Peace
 1300: Rule	Edm	1945	only	-	Sep	lastSun	2:00	0	S
 1301: Rule	Edm	1947	only	-	Apr	lastSun	2:00	1:00	D
 1302: Rule	Edm	1947	only	-	Sep	lastSun	2:00	0	S
 1303: Rule	Edm	1967	only	-	Apr	lastSun	2:00	1:00	D
 1304: Rule	Edm	1967	only	-	Oct	lastSun	2:00	0	S
 1305: Rule	Edm	1969	only	-	Apr	lastSun	2:00	1:00	D
 1306: Rule	Edm	1969	only	-	Oct	lastSun	2:00	0	S
 1307: Rule	Edm	1972	1986	-	Apr	lastSun	2:00	1:00	D
 1308: Rule	Edm	1972	max	-	Oct	lastSun	2:00	0	S
 1309: Rule	Edm	1987	max	-	Apr	Sun>=1	2:00	1:00	D
 1310: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1311: Zone America/Edmonton	-7:33:52 -	LMT	1906 Sep
 1312: 			-7:00	Edm	M%sT
 1313: 
 1314: 
 1315: # British Columbia
 1316: 
 1317: # From Paul Eggert (2000-10-02):
 1318: # Shanks writes that since 1970 most of this region has been like Vancouver.
 1319: # Dawson Creek uses MST.  Much of east BC is like Edmonton.
 1320: # Matthews and Vincent (1998) write that Creston is like Dawson Creek.
 1321: 
 1322: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1323: Rule	Vanc	1918	only	-	Apr	14	2:00	1:00	D
 1324: Rule	Vanc	1918	only	-	Oct	31	2:00	0	S
 1325: Rule	Vanc	1942	only	-	Feb	 9	2:00	1:00	W # War
 1326: Rule	Vanc	1945	only	-	Aug	14	23:00u	1:00	P # Peace
 1327: Rule	Vanc	1945	only	-	Sep	30	2:00	0	S
 1328: Rule	Vanc	1946	1986	-	Apr	lastSun	2:00	1:00	D
 1329: Rule	Vanc	1946	only	-	Oct	13	2:00	0	S
 1330: Rule	Vanc	1947	1961	-	Sep	lastSun	2:00	0	S
 1331: Rule	Vanc	1962	max	-	Oct	lastSun	2:00	0	S
 1332: Rule	Vanc	1987	max	-	Apr	Sun>=1	2:00	1:00	D
 1333: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1334: Zone America/Vancouver	-8:12:28 -	LMT	1884
 1335: 			-8:00	Vanc	P%sT
 1336: Zone America/Dawson_Creek -8:00:56 -	LMT	1884
 1337: 			-8:00	Canada	P%sT	1947
 1338: 			-8:00	Vanc	P%sT	1972 Aug 30 2:00
 1339: 			-7:00	-	MST
 1340: 
 1341: 
 1342: # Northwest Territories, Nunavut, Yukon
 1343: 
 1344: # From Paul Eggert (1999-10-29):
 1345: # Dawson switched to PST in 1973.  Inuvik switched to MST in 1979.
 1346: # Mathew Englander (1996-10-07) gives the following refs:
 1347: #	* 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
 1348: #	c. 7 defines Yukon standard time as UTC-9.  This is still valid;
 1349: #	see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
 1350: #	* C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
 1351: #	* O.I.C. 1980/02 established DST.
 1352: #	* O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
 1353: # Shanks says Yukon's 1973-10-28 switch was at 2:00; go with Englander.
 1354: 
 1355: # From Rives McDow (1999-09-04):
 1356: # Nunavut ... moved ... to incorporate the whole territory into one time zone.
 1357: # <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html">
 1358: # Nunavut moves to single time zone Oct. 31
 1359: # </a>
 1360: #
 1361: # From Antoine Leca (1999-09-06):
 1362: # We then need to create a new timezone for the Kitikmeot region of Nunavut
 1363: # to differentiate it from the Yellowknife region.
 1364: 
 1365: # From Paul Eggert (1999-09-20):
 1366: # <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html">
 1367: # Basic Facts: The New Territory
 1368: # </a> (1999) reports that Pangnirtung operates on eastern time,
 1369: # and that Coral Harbour does not observe DST.  We don't know when
 1370: # Pangnirtung switched to eastern time; we'll guess 1995.
 1371: 
 1372: # From Rives McDow (1999-11-08):
 1373: # On October 31, when the rest of Nunavut went to Central time,
 1374: # Pangnirtung wobbled.  Here is the result of their wobble:
 1375: #
 1376: # The following businesses and organizations in Pangnirtung use Central Time:
 1377: #
 1378: #	First Air, Power Corp, Nunavut Construction, Health Center, RCMP,
 1379: #	Eastern Arctic National Parks, A & D Specialist
 1380: #
 1381: # The following businesses and organizations in Pangnirtung use Eastern Time:
 1382: #
 1383: #	Hamlet office, All other businesses, Both schools, Airport operator
 1384: #
 1385: # This has made for an interesting situation there, which warranted the news.
 1386: # No one there that I spoke with seems concerned, or has plans to
 1387: # change the local methods of keeping time, as it evidently does not
 1388: # really interfere with any activities or make things difficult locally.
 1389: # They plan to celebrate New Year's turn-over twice, one hour apart,
 1390: # so it appears that the situation will last at least that long.
 1391: # The Nunavut Intergovernmental Affairs hopes that they will "come to
 1392: # their senses", but the locals evidently don't see any problem with
 1393: # the current state of affairs.
 1394: 
 1395: # From Michaela Rodrigue, writing in the
 1396: # <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html">
 1397: # Nunatsiaq News (1999-11-19)</a>:
 1398: # Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones,
 1399: # central - or Nunavut time - for government offices, and eastern time
 1400: # for municipal offices and schools....  Igloolik [was similar but then]
 1401: # made the switch to central time on Saturday, Nov. 6.
 1402: 
 1403: # From Paul Eggert (2000-10-02):
 1404: # Matthews and Vincent (1998) say the following, but we lack histories
 1405: # for these potential new Zones.
 1406: #
 1407: # The Canadian Forces station at Alert uses Eastern Time while the
 1408: # handful of residents at the Eureka weather station [in the Central
 1409: # zone] skip daylight savings.  Baffin Island, which is crossed by the
 1410: # Central, Eastern and Atlantic Time zones only uses Eastern Time.
 1411: # Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of
 1412: # Central Time and Southampton Island [in the Central zone] is not
 1413: # required to use daylight savings.
 1414: 
 1415: # From
 1416: # <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html">
 1417: # Nunavut now has two time zones
 1418: # </a> (2000-11-10):
 1419: # The Nunavut government would allow its employees in Kugluktuk and
 1420: # Cambridge Bay to operate on central time year-round, putting them
 1421: # one hour behind the rest of Nunavut for six months during the winter.
 1422: # At the end of October the two communities had rebelled against
 1423: # Nunavut's unified time zone, refusing to shift to eastern time with
 1424: # the rest of the territory for the winter.  Cambridge Bay remained on
 1425: # central time, while Kugluktuk, even farther west, reverted to
 1426: # mountain time, which they had used before the advent of Nunavut's
 1427: # unified time zone in 1999.
 1428: #
 1429: # From Rives McDow (2001-01-20), quoting the Nunavut government:
 1430: # The preceding decision came into effect at midnight, Saturday Nov 4, 2000.
 1431: 
 1432: # From Paul Eggert (2000-12-04):
 1433: # Let's just keep track of the official times for now.
 1434: 
 1435: # From Rives McDow (2001-03-07):
 1436: # The premier of Nunavut has issued a ministerial statement advising
 1437: # that effective 2001-04-01, the territory of Nunavut will revert
 1438: # back to three time zones (mountain, central, and eastern).  Of the
 1439: # cities in Nunavut, Coral Harbor is the only one that I know of that
 1440: # has said it will not observe dst, staying on EST year round.  I'm
 1441: # checking for more info, and will get back to you if I come up with
 1442: # more.
 1443: # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]
 1444: 
 1445: # From Gwillim Law (2005-05-21):
 1446: # According to maps at
 1447: # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg
 1448: # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg
 1449: # (both dated 2003), and
 1450: # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp
 1451: # (from a 1998 Canadian Geographic article), the de facto and de jure time
 1452: # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year
 1453: # round.  Using Google, it's easy to find other websites that confirm this.
 1454: # I wasn't able to find how far back this time regimen goes, but since it
 1455: # predates the creation of Nunavut, it probably goes back many years....
 1456: # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used.
 1457: #
 1458: # From Paul Eggert (2005-07-26):
 1459: # For lack of better information, assume that Southampton Island observed
 1460: # daylight saving only during wartime.
 1461: 
 1462: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1463: Rule	NT_YK	1918	only	-	Apr	14	2:00	1:00	D
 1464: Rule	NT_YK	1918	only	-	Oct	27	2:00	0	S
 1465: Rule	NT_YK	1919	only	-	May	25	2:00	1:00	D
 1466: Rule	NT_YK	1919	only	-	Nov	 1	0:00	0	S
 1467: Rule	NT_YK	1942	only	-	Feb	 9	2:00	1:00	W # War
 1468: Rule	NT_YK	1945	only	-	Aug	14	23:00u	1:00	P # Peace
 1469: Rule	NT_YK	1945	only	-	Sep	30	2:00	0	S
 1470: Rule	NT_YK	1965	only	-	Apr	lastSun	0:00	2:00	DD
 1471: Rule	NT_YK	1965	only	-	Oct	lastSun	2:00	0	S
 1472: Rule	NT_YK	1980	1986	-	Apr	lastSun	2:00	1:00	D
 1473: Rule	NT_YK	1980	max	-	Oct	lastSun	2:00	0	S
 1474: Rule	NT_YK	1987	max	-	Apr	Sun>=1	2:00	1:00	D
 1475: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1476: Zone America/Pangnirtung -4:22:56 -	LMT	1884
 1477: 			-4:00	NT_YK	A%sT	1995 Apr Sun>=1 2:00
 1478: 			-5:00	Canada	E%sT	1999 Oct 31 2:00
 1479: 			-6:00	Canada	C%sT	2000 Oct 29 2:00
 1480: 			-5:00	Canada	E%sT
 1481: Zone America/Iqaluit	-4:33:52 -	LMT	1884 # Frobisher Bay before 1987
 1482: 			-5:00	NT_YK	E%sT	1999 Oct 31 2:00
 1483: 			-6:00	Canada	C%sT	2000 Oct 29 2:00
 1484: 			-5:00	Canada	E%sT
 1485: Zone America/Coral_Harbour -5:32:40 -	LMT	1884
 1486: 			-5:00	NT_YK	E%sT	1946
 1487: 			-5:00	-	EST
 1488: Zone America/Rankin_Inlet -6:08:40 -	LMT	1884
 1489: 			-6:00	NT_YK	C%sT	2000 Oct 29 2:00
 1490: 			-5:00	-	EST	2001 Apr  1 3:00
 1491: 			-6:00	Canada	C%sT
 1492: Zone America/Cambridge_Bay -7:00:20 -	LMT	1884
 1493: 			-7:00	NT_YK	M%sT	1999 Oct 31 2:00
 1494: 			-6:00	Canada	C%sT	2000 Oct 29 2:00
 1495: 			-5:00	-	EST	2000 Nov  5 0:00
 1496: 			-6:00	-	CST	2001 Apr  1 3:00
 1497: 			-7:00	Canada	M%sT
 1498: Zone America/Yellowknife -7:37:24 -	LMT	1884
 1499: 			-7:00	NT_YK	M%sT
 1500: Zone America/Inuvik	-8:54:00 -	LMT	1884
 1501: 			-8:00	NT_YK	P%sT	1979 Apr lastSun 2:00
 1502: 			-7:00	NT_YK	M%sT
 1503: Zone America/Whitehorse	-9:00:12 -	LMT	1900 Aug 20
 1504: 			-9:00	NT_YK	Y%sT	1966 Jul 1 2:00
 1505: 			-8:00	NT_YK	P%sT
 1506: Zone America/Dawson	-9:17:40 -	LMT	1900 Aug 20
 1507: 			-9:00	NT_YK	Y%sT	1973 Oct 28 0:00
 1508: 			-8:00	NT_YK	P%sT
 1509: 
 1510: 
 1511: ###############################################################################
 1512: 
 1513: # Mexico
 1514: 
 1515: # From Paul Eggert (2001-03-05):
 1516: # The Investigation and Analysis Service of the
 1517: # Mexican Library of Congress (MLoC) has published a
 1518: # <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/">
 1519: # history of Mexican local time (in Spanish)
 1520: # </a>.
 1521: #
 1522: # Here are the discrepancies between Shanks and the MLoC.
 1523: # (In all cases we go with the MLoC.)
 1524: # Shanks reports that Baja was at -8:00 in 1922/1923.
 1525: # Shanks says the 1930 transition in Baja was 1930-11-16.
 1526: # Shanks reports no DST during summer 1931.
 1527: # Shanks reports a transition at 1932-03-30 23:00, not 1932-04-01.
 1528: # Shanks does not report transitions for Baja in 1945 or 1948.
 1529: # Shanks reports southern Mexico transitions on 1981-12-01, not 12-23.
 1530: # Shanks says Quintana Roo switched to -6:00 on 1982-12-02, and to -5:00
 1531: # on 1997-10-26 at 02:00.
 1532: 
 1533: # From Gwillim Law (2001-02-20):
 1534: # There are some other discrepancies between the Decrees page and the
 1535: # tz database.  I think they can best be explained by supposing that
 1536: # the researchers who prepared the Decrees page failed to find some of
 1537: # the relevant documents.
 1538: 
 1539: # From Paul Eggert (2000-07-26):
 1540: # Shanks gives 1942-04-01 instead of 1942-04-24, and omits the 1981
 1541: # and 1988 DST experiments.  Go with spin.com.mx.
 1542: 
 1543: # From Alan Perry (1996-02-15):
 1544: # A guy from our Mexico subsidiary finally found the Presidential Decree
 1545: # outlining the timezone changes in Mexico.
 1546: #
 1547: # ------------- Begin Forwarded Message -------------
 1548: #
 1549: # I finally got my hands on the Official Presidential Decree that sets up the
 1550: # rules for the DST changes. The rules are:
 1551: #
 1552: # 1. The country is divided in 3 timezones:
 1553: #    - Baja California Norte (the Mexico/BajaNorte TZ)
 1554: #    - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)
 1555: #    - The rest of the country (the Mexico/General TZ)
 1556: #
 1557: # 2. From the first Sunday in April at 2:00 AM to the last Sunday in October
 1558: #    at 2:00 AM, the times in each zone are as follows:
 1559: #    BajaNorte: GMT+7
 1560: #    BajaSur:   GMT+6
 1561: #    General:   GMT+5
 1562: #
 1563: # 3. The rest of the year, the times are as follows:
 1564: #    BajaNorte: GMT+8
 1565: #    BajaSur:   GMT+7
 1566: #    General:   GMT+6
 1567: #
 1568: # The Decree was published in Mexico's Official Newspaper on January 4th.
 1569: #
 1570: # -------------- End Forwarded Message --------------
 1571: # From Paul Eggert (1996-06-12):
 1572: # For an English translation of the decree, see
 1573: # <a href="http://mexico-travel.com/extra/timezone_eng.html">
 1574: # ``Diario Oficial: Time Zone Changeover'' (1996-01-04).
 1575: # </a>
 1576: 
 1577: # From Rives McDow (1998-10-08):
 1578: # The State of Quintana Roo has reverted back to central STD and DST times
 1579: # (i.e. UTC -0600 and -0500 as of 1998-08-02).
 1580: 
 1581: # From Rives McDow (2000-01-10):
 1582: # Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time
 1583: # zone 5 hours from the International Date Line, and will not observe daylight
 1584: # savings time so as to stay on the same time zone as the southern part of
 1585: # Arizona year round.
 1586: 
 1587: # From Jesper Norgaard, translating
 1588: # <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):
 1589: # In Oaxaca, the 55.000 teachers from the Section 22 of the National
 1590: # Syndicate of Education Workers, refuse to apply daylight saving each
 1591: # year, so that the more than 10,000 schools work at normal hour the
 1592: # whole year.
 1593: 
 1594: # From Gwillim Law (2001-01-19):
 1595: # <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says
 1596: # (translated):...
 1597: # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced
 1598: # that Summer Time will be reduced from seven to five months, starting
 1599: # this year....
 1600: # <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001>
 1601: # [translated], says "summer time will ... take effect on the first Sunday
 1602: # in May, and end on the last Sunday of September.
 1603: 
 1604: # From Arthur David Olson (2001-01-25):
 1605: # The 2001-01-24 traditional Washington Post contained the page one
 1606: # story "Timely Issue Divides Mexicans."...
 1607: # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
 1608: # ... Mexico City Mayor Lopez Obrador "...is threatening to keep
 1609: # Mexico City and its 20 million residents on a different time than
 1610: # the rest of the country..." In particular, Lopez Obrador would abolish
 1611: # observation of Daylight Saving Time.
 1612: 
 1613: # <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre">
 1614: # Official statute published by the Energy Department
 1615: # </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
 1616: # and Sonora with no DST.  This was reported by Jesper Norgaard (2001-02-03).
 1617: 
 1618: # From Paul Eggert (2001-03-03):
 1619: #
 1620: # <a href="http://www.latimes.com/news/nation/20010303/t000018766.html">
 1621: # James F. Smith writes in today's LA Times
 1622: # </a>
 1623: # * Sonora will continue to observe standard time.
 1624: # * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that
 1625: #   the Federal District will not adopt DST.
 1626: # * 4 of 16 district leaders announced they'll ignore the decree.
 1627: # * The decree does not affect federal-controlled facilities including
 1628: #   the airport, banks, hospitals, and schools.
 1629: #
 1630: # For now we'll assume that the Federal District will bow to federal rules.
 1631: 
 1632: # From Jesper Norgaard (2001-04-01):
 1633: # I found some references to the Mexican application of daylight
 1634: # saving, which modifies what I had already sent you, stating earlier
 1635: # that a number of northern Mexican states would go on daylight
 1636: # saving. The modification reverts this to only cover Baja California
 1637: # (Norte), while all other states (except Sonora, who has no daylight
 1638: # saving all year) will follow the original decree of president
 1639: # Vicente Fox, starting daylight saving May 6, 2001 and ending
 1640: # September 30, 2001.
 1641: # References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp>
 1642: # Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)
 1643: 
 1644: # From Reuters (2001-09-04):
 1645: # Mexico's Supreme Court on Tuesday declared that daylight savings was
 1646: # unconstitutional in Mexico City, creating the possibility the
 1647: # capital will be in a different time zone from the rest of the nation
 1648: # next year....  The Supreme Court's ruling takes effect at 2:00
 1649: # a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to
 1650: # standard time. "This is so residents of the Federal District are not
 1651: # subject to unexpected time changes," a statement from the court said.
 1652: 
 1653: # From Jesper Norgaard Welen (2002-03-12):
 1654: # ... consulting my local grocery store(!) and my coworkers, they all insisted
 1655: # that a new decision had been made to reinstate US style DST in Mexico....
 1656: # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20)
 1657: # confirms this.  Sonora as usual is the only state where DST is not applied.
 1658: 
 1659: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1660: Rule	Mexico	1939	only	-	Feb	5	0:00	1:00	D
 1661: Rule	Mexico	1939	only	-	Jun	25	0:00	0	S
 1662: Rule	Mexico	1940	only	-	Dec	9	0:00	1:00	D
 1663: Rule	Mexico	1941	only	-	Apr	1	0:00	0	S
 1664: Rule	Mexico	1943	only	-	Dec	16	0:00	1:00	W # War
 1665: Rule	Mexico	1944	only	-	May	1	0:00	0	S
 1666: Rule	Mexico	1950	only	-	Feb	12	0:00	1:00	D
 1667: Rule	Mexico	1950	only	-	Jul	30	0:00	0	S
 1668: Rule	Mexico	1996	2000	-	Apr	Sun>=1	2:00	1:00	D
 1669: Rule	Mexico	1996	2000	-	Oct	lastSun	2:00	0	S
 1670: Rule	Mexico	2001	only	-	May	Sun>=1	2:00	1:00	D
 1671: Rule	Mexico	2001	only	-	Sep	lastSun	2:00	0	S
 1672: Rule	Mexico	2002	max	-	Apr	Sun>=1	2:00	1:00	D
 1673: Rule	Mexico	2002	max	-	Oct	lastSun	2:00	0	S
 1674: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1675: # Quintana Roo
 1676: Zone America/Cancun	-5:47:04 -	LMT	1922 Jan  1  0:12:56
 1677: 			-6:00	-	CST	1981 Dec 23
 1678: 			-5:00	Mexico	E%sT	1998 Aug  2  2:00
 1679: 			-6:00	Mexico	C%sT
 1680: # Campeche, Yucatan
 1681: Zone America/Merida	-5:58:28 -	LMT	1922 Jan  1  0:01:32
 1682: 			-6:00	-	CST	1981 Dec 23
 1683: 			-5:00	-	EST	1982 Dec  2
 1684: 			-6:00	Mexico	C%sT
 1685: # Coahuila, Durango, Nuevo Leon, Tamaulipas
 1686: Zone America/Monterrey	-6:41:16 -	LMT	1921 Dec 31 23:18:44
 1687: 			-6:00	-	CST	1988
 1688: 			-6:00	US	C%sT	1989
 1689: 			-6:00	Mexico	C%sT
 1690: # Central Mexico
 1691: Zone America/Mexico_City -6:36:36 -	LMT	1922 Jan  1  0:23:24
 1692: 			-7:00	-	MST	1927 Jun 10 23:00
 1693: 			-6:00	-	CST	1930 Nov 15
 1694: 			-7:00	-	MST	1931 May  1 23:00
 1695: 			-6:00	-	CST	1931 Oct
 1696: 			-7:00	-	MST	1932 Apr  1
 1697: 			-6:00	Mexico	C%sT	2001 Sep 30 02:00
 1698: 			-6:00	-	CST	2002 Feb 20
 1699: 			-6:00	Mexico	C%sT
 1700: # Chihuahua
 1701: Zone America/Chihuahua	-7:04:20 -	LMT	1921 Dec 31 23:55:40
 1702: 			-7:00	-	MST	1927 Jun 10 23:00
 1703: 			-6:00	-	CST	1930 Nov 15
 1704: 			-7:00	-	MST	1931 May  1 23:00
 1705: 			-6:00	-	CST	1931 Oct
 1706: 			-7:00	-	MST	1932 Apr  1
 1707: 			-6:00	-	CST	1996
 1708: 			-6:00	Mexico	C%sT	1998
 1709: 			-6:00	-	CST	1998 Apr Sun>=1 3:00
 1710: 			-7:00	Mexico	M%sT
 1711: # Sonora
 1712: Zone America/Hermosillo	-7:23:52 -	LMT	1921 Dec 31 23:36:08
 1713: 			-7:00	-	MST	1927 Jun 10 23:00
 1714: 			-6:00	-	CST	1930 Nov 15
 1715: 			-7:00	-	MST	1931 May  1 23:00
 1716: 			-6:00	-	CST	1931 Oct
 1717: 			-7:00	-	MST	1932 Apr  1
 1718: 			-6:00	-	CST	1942 Apr 24
 1719: 			-7:00	-	MST	1949 Jan 14
 1720: 			-8:00	-	PST	1970
 1721: 			-7:00	Mexico	M%sT	1999
 1722: 			-7:00	-	MST
 1723: # Baja California Sur, Nayarit, Sinaloa
 1724: Zone America/Mazatlan	-7:05:40 -	LMT	1921 Dec 31 23:54:20
 1725: 			-7:00	-	MST	1927 Jun 10 23:00
 1726: 			-6:00	-	CST	1930 Nov 15
 1727: 			-7:00	-	MST	1931 May  1 23:00
 1728: 			-6:00	-	CST	1931 Oct
 1729: 			-7:00	-	MST	1932 Apr  1
 1730: 			-6:00	-	CST	1942 Apr 24
 1731: 			-7:00	-	MST	1949 Jan 14
 1732: 			-8:00	-	PST	1970
 1733: 			-7:00	Mexico	M%sT
 1734: # Baja California
 1735: Zone America/Tijuana	-7:48:04 -	LMT	1922 Jan  1  0:11:56
 1736: 			-7:00	-	MST	1924
 1737: 			-8:00	-	PST	1927 Jun 10 23:00
 1738: 			-7:00	-	MST	1930 Nov 15
 1739: 			-8:00	-	PST	1931 Apr  1
 1740: 			-8:00	1:00	PDT	1931 Sep 30
 1741: 			-8:00	-	PST	1942 Apr 24
 1742: 			-8:00	1:00	PWT	1945 Nov 12
 1743: 			-8:00	-	PST	1948 Apr  5
 1744: 			-8:00	1:00	PDT	1949 Jan 14
 1745: 			-8:00	-	PST	1954
 1746: 			-8:00	CA	P%sT	1961
 1747: 			-8:00	-	PST	1976
 1748: 			-8:00	US	P%sT	1996
 1749: 			-8:00	Mexico	P%sT	2001
 1750: 			-8:00	US	P%sT	2002 Feb 20
 1751: 			-8:00	Mexico	P%sT
 1752: # From Paul Eggert (2001-03-05):
 1753: # Formerly there was an America/Ensenada zone, which differed from
 1754: # America/Tijuana only in that it did not observe DST from 1976
 1755: # through 1995.  This was as per Shanks.  However, Guy Harris reports
 1756: # that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and
 1757: # Tijuana observe DST," which contradicts Shanks but does imply that
 1758: # DST-observance was a town-by-town matter back then.  This concerns
 1759: # data after 1970 so most likely there should be at least one Zone
 1760: # other than America/Tijuana for Baja, but it's not clear yet what its
 1761: # name or contents should be.
 1762: #
 1763: # Revillagigedo Is
 1764: # no information
 1765: 
 1766: ###############################################################################
 1767: 
 1768: # Anguilla
 1769: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1770: Zone America/Anguilla	-4:12:16 -	LMT	1912 Mar 2
 1771: 			-4:00	-	AST
 1772: 
 1773: # Antigua and Barbuda
 1774: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1775: Zone	America/Antigua	-4:07:12 -	LMT	1912 Mar 2
 1776: 			-5:00	-	EST	1951
 1777: 			-4:00	-	AST
 1778: 
 1779: # Bahamas
 1780: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1781: Rule	Bahamas	1964	max	-	Oct	lastSun	2:00	0	S
 1782: Rule	Bahamas	1964	1986	-	Apr	lastSun	2:00	1:00	D
 1783: Rule	Bahamas	1987	max	-	Apr	Sun>=1	2:00	1:00	D
 1784: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1785: Zone	America/Nassau	-5:09:24 -	LMT	1912 Mar 2
 1786: 			-5:00	Bahamas	E%sT
 1787: 
 1788: # Barbados
 1789: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1790: Rule	Barb	1977	only	-	Jun	12	2:00	1:00	D
 1791: Rule	Barb	1977	1978	-	Oct	Sun>=1	2:00	0	S
 1792: Rule	Barb	1978	1980	-	Apr	Sun>=15	2:00	1:00	D
 1793: Rule	Barb	1979	only	-	Sep	30	2:00	0	S
 1794: Rule	Barb	1980	only	-	Sep	25	2:00	0	S
 1795: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1796: Zone America/Barbados	-3:58:28 -	LMT	1924		# Bridgetown
 1797: 			-3:58:28 -	BMT	1932	  # Bridgetown Mean Time
 1798: 			-4:00	Barb	A%sT
 1799: 
 1800: # Belize
 1801: # Whitman entirely disagrees with Shanks; go with Shanks.
 1802: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1803: Rule	Belize	1918	1942	-	Oct	Sun>=2	0:00	0:30	HD
 1804: Rule	Belize	1919	1943	-	Feb	Sun>=9	0:00	0	S
 1805: Rule	Belize	1973	only	-	Dec	 5	0:00	1:00	D
 1806: Rule	Belize	1974	only	-	Feb	 9	0:00	0	S
 1807: Rule	Belize	1982	only	-	Dec	18	0:00	1:00	D
 1808: Rule	Belize	1983	only	-	Feb	12	0:00	0	S
 1809: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1810: Zone	America/Belize	-5:52:48 -	LMT	1912 Apr
 1811: 			-6:00	Belize	C%sT
 1812: 
 1813: # Bermuda
 1814: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1815: Zone Atlantic/Bermuda	-4:19:04 -	LMT	1930 Jan  1 2:00    # Hamilton
 1816: 			-4:00	-	AST	1974 Apr 28 2:00
 1817: 			-4:00	Bahamas	A%sT
 1818: 
 1819: # Cayman Is
 1820: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1821: Zone	America/Cayman	-5:25:32 -	LMT	1890		# Georgetown
 1822: 			-5:07:12 -	KMT	1912 Feb    # Kingston Mean Time
 1823: 			-5:00	-	EST
 1824: 
 1825: # Costa Rica
 1826: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1827: Rule	CR	1979	1980	-	Feb	lastSun	0:00	1:00	D
 1828: Rule	CR	1979	1980	-	Jun	Sun>=1	0:00	0	S
 1829: Rule	CR	1991	1992	-	Jan	Sat>=15	0:00	1:00	D
 1830: # IATA SSIM (1991-09) says the following was at 1:00; go with Shanks.
 1831: Rule	CR	1991	only	-	Jul	 1	0:00	0	S
 1832: Rule	CR	1992	only	-	Mar	15	0:00	0	S
 1833: # There are too many San Joses elsewhere, so we'll use `Costa Rica'.
 1834: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1835: Zone America/Costa_Rica	-5:36:20 -	LMT	1890		# San Jose
 1836: 			-5:36:20 -	SJMT	1921 Jan 15 # San Jose Mean Time
 1837: 			-6:00	CR	C%sT
 1838: # Coco
 1839: # no information; probably like America/Costa_Rica
 1840: 
 1841: # Cuba
 1842: 
 1843: # From Arthur David Olson (1999-03-29):
 1844: # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
 1845: # the Cuban National Team and the Baltimore Orioles was carried live on
 1846: # the Orioles Radio Network, including affiliate WTOP in Washington, DC.
 1847: # During the game, play-by-play announcer Jim Hunter noted that
 1848: # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
 1849: # Time today."  (The "two hour" remark referred to losing one hour of
 1850: # sleep on 1999-03-28--when the announcers were in Cuba as it switched
 1851: # to DST--and one more hour on 1999-04-04--when the announcers will have
 1852: # returned to Baltimore, which switches on that date.)
 1853: 
 1854: # From Evert van der Veer via Steffen Thorsen (2004-10-28):
 1855: # Cuba is not going back to standard time this year.
 1856: # From Paul Eggert (2004-10-28):
 1857: # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html
 1858: # says that it's due to a problem at the Antonio Guiteras
 1859: # thermoelectric plant, and says "This October there will be no return
 1860: # to normal hours (after daylight saving time)".
 1861: # For now, let's assume that it's a one-year temporary measure.
 1862: 
 1863: # From Carlos A. Carnero Delgado (2005-11-12):
 1864: # This year (just like in 2004-2005) there's no change in time zone
 1865: # adjustment in Cuba.  We will stay in daylight saving time:
 1866: # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html
 1867: 
 1868: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1869: Rule	Cuba	1928	only	-	Jun	10	0:00	1:00	D
 1870: Rule	Cuba	1928	only	-	Oct	10	0:00	0	S
 1871: Rule	Cuba	1940	1942	-	Jun	Sun>=1	0:00	1:00	D
 1872: Rule	Cuba	1940	1942	-	Sep	Sun>=1	0:00	0	S
 1873: Rule	Cuba	1945	1946	-	Jun	Sun>=1	0:00	1:00	D
 1874: Rule	Cuba	1945	1946	-	Sep	Sun>=1	0:00	0	S
 1875: Rule	Cuba	1965	only	-	Jun	1	0:00	1:00	D
 1876: Rule	Cuba	1965	only	-	Sep	30	0:00	0	S
 1877: Rule	Cuba	1966	only	-	May	29	0:00	1:00	D
 1878: Rule	Cuba	1966	only	-	Oct	2	0:00	0	S
 1879: Rule	Cuba	1967	only	-	Apr	8	0:00	1:00	D
 1880: Rule	Cuba	1967	1968	-	Sep	Sun>=8	0:00	0	S
 1881: Rule	Cuba	1968	only	-	Apr	14	0:00	1:00	D
 1882: Rule	Cuba	1969	1977	-	Apr	lastSun	0:00	1:00	D
 1883: Rule	Cuba	1969	1971	-	Oct	lastSun	0:00	0	S
 1884: Rule	Cuba	1972	1974	-	Oct	8	0:00	0	S
 1885: Rule	Cuba	1975	1977	-	Oct	lastSun	0:00	0	S
 1886: Rule	Cuba	1978	only	-	May	7	0:00	1:00	D
 1887: Rule	Cuba	1978	1990	-	Oct	Sun>=8	0:00	0	S
 1888: Rule	Cuba	1979	1980	-	Mar	Sun>=15	0:00	1:00	D
 1889: Rule	Cuba	1981	1985	-	May	Sun>=5	0:00	1:00	D
 1890: Rule	Cuba	1986	1989	-	Mar	Sun>=14	0:00	1:00	D
 1891: Rule	Cuba	1990	1997	-	Apr	Sun>=1	0:00	1:00	D
 1892: Rule	Cuba	1991	1995	-	Oct	Sun>=8	0:00s	0	S
 1893: Rule	Cuba	1996	only	-	Oct	 6	0:00s	0	S
 1894: Rule	Cuba	1997	only	-	Oct	12	0:00s	0	S
 1895: Rule	Cuba	1998	1999	-	Mar	lastSun	0:00s	1:00	D
 1896: Rule	Cuba	1998	2003	-	Oct	lastSun	0:00s	0	S
 1897: Rule	Cuba	2000	max	-	Apr	Sun>=1	0:00s	1:00	D
 1898: Rule	Cuba	2006	max	-	Oct	lastSun	0:00s	0	S
 1899: 
 1900: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1901: Zone	America/Havana	-5:29:28 -	LMT	1890
 1902: 			-5:29:36 -	HMT	1925 Jul 19 12:00 # Havana MT
 1903: 			-5:00	Cuba	C%sT
 1904: 
 1905: # Dominica
 1906: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1907: Zone America/Dominica	-4:05:36 -	LMT	1911 Jul 1 0:01		# Roseau
 1908: 			-4:00	-	AST
 1909: 
 1910: # Dominican Republic
 1911: 
 1912: # From Steffen Thorsen (2000-10-30):
 1913: # Enrique Morales reported to me that the Dominican Republic has changed the
 1914: # time zone to Eastern Standard Time as of Sunday 29 at 2 am....
 1915: # http://www.listin.com.do/antes/261000/republica/princi.html
 1916: 
 1917: # From Paul Eggert (2000-12-04):
 1918: # That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
 1919: 
 1920: # From Rives McDow (2000-12-01):
 1921: # Dominican Republic changed its mind and presidential decree on Tuesday,
 1922: # November 28, 2000, with a new decree.  On Sunday, December 3 at 1:00 AM the
 1923: # Dominican Republic will be reverting to 8 hours from the International Date
 1924: # Line, and will not be using DST in the foreseeable future.  The reason they
 1925: # decided to use DST was to be in synch with Puerto Rico, who was also going
 1926: # to implement DST.  When Puerto Rico didn't implement DST, the president
 1927: # decided to revert.
 1928: 
 1929: 
 1930: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1931: Rule	DR	1966	only	-	Oct	30	0:00	1:00	D
 1932: Rule	DR	1967	only	-	Feb	28	0:00	0	S
 1933: Rule	DR	1969	1973	-	Oct	lastSun	0:00	0:30	HD
 1934: Rule	DR	1970	only	-	Feb	21	0:00	0	S
 1935: Rule	DR	1971	only	-	Jan	20	0:00	0	S
 1936: Rule	DR	1972	1974	-	Jan	21	0:00	0	S
 1937: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1938: Zone America/Santo_Domingo -4:39:36 -	LMT	1890
 1939: 			-4:40	-	SDMT	1933 Apr  1 12:00 # S. Dom. MT
 1940: 			-5:00	DR	E%sT	1974 Oct 27
 1941: 			-4:00	-	AST	2000 Oct 29 02:00
 1942: 			-5:00	US	E%sT	2000 Dec  3 01:00
 1943: 			-4:00	-	AST
 1944: 
 1945: # El Salvador
 1946: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1947: Rule	Salv	1987	1988	-	May	Sun>=1	0:00	1:00	D
 1948: Rule	Salv	1987	1988	-	Sep	lastSun	0:00	0	S
 1949: # There are too many San Salvadors elsewhere, so use America/El_Salvador
 1950: # instead of America/San_Salvador.
 1951: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1952: Zone America/El_Salvador -5:56:48 -	LMT	1921		# San Salvador
 1953: 			-6:00	Salv	C%sT
 1954: 
 1955: # Grenada
 1956: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1957: Zone	America/Grenada	-4:07:00 -	LMT	1911 Jul	# St George's
 1958: 			-4:00	-	AST
 1959: 
 1960: # Guadeloupe
 1961: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1962: Zone America/Guadeloupe	-4:06:08 -	LMT	1911 Jun 8	# Pointe a Pitre
 1963: 			-4:00	-	AST
 1964: 
 1965: # Guatemala
 1966: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1967: Rule	Guat	1973	only	-	Nov	25	0:00	1:00	D
 1968: Rule	Guat	1974	only	-	Feb	24	0:00	0	S
 1969: Rule	Guat	1983	only	-	May	21	0:00	1:00	D
 1970: Rule	Guat	1983	only	-	Sep	22	0:00	0	S
 1971: Rule	Guat	1991	only	-	Mar	23	0:00	1:00	D
 1972: Rule	Guat	1991	only	-	Sep	 7	0:00	0	S
 1973: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1974: Zone America/Guatemala	-6:02:04 -	LMT	1918 Oct 5
 1975: 			-6:00	Guat	C%sT
 1976: 
 1977: # Haiti
 1978: # From Gwillim Law (2005-04-15):
 1979: # Risto O. Nykanen wrote me that Haiti is now on DST.
 1980: # I searched for confirmation, and I found a
 1981: # <a href="http://www.haitianconsulate.org/time.doc"> press release
 1982: # on the Web page of the Haitian Consulate in Chicago (2005-03-31),
 1983: # </a>.  Translated from French, it says:
 1984: #
 1985: #  "The Prime Minister's Communication Office notifies the public in general
 1986: #   and the press in particular that, following a decision of the Interior
 1987: #   Ministry and the Territorial Collectivities [I suppose that means the
 1988: #   provinces], Haiti will move to Eastern Daylight Time in the night from next
 1989: #   Saturday the 2nd to Sunday the 3rd.
 1990: #
 1991: #  "Consequently, the Prime Minister's Communication Office wishes to inform
 1992: #   the population that the country's clocks will be set forward one hour
 1993: #   starting at midnight.  This provision will hold until the last Saturday in
 1994: #   October 2005.
 1995: #
 1996: #  "Port-au-Prince, March 31, 2005"
 1997: 
 1998: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1999: Rule	Haiti	1983	only	-	May	8	0:00	1:00	D
 2000: Rule	Haiti	1984	1987	-	Apr	lastSun	0:00	1:00	D
 2001: Rule	Haiti	1983	1987	-	Oct	lastSun	0:00	0	S
 2002: # Shanks says AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.  Go with IATA.
 2003: Rule	Haiti	1988	1997	-	Apr	Sun>=1	1:00s	1:00	D
 2004: Rule	Haiti	1988	1997	-	Oct	lastSun	1:00s	0	S
 2005: Rule	Haiti	2005	only	-	Apr	Sun>=1	0:00	1:00	D
 2006: Rule	Haiti	2005	only	-	Oct	lastSun	0:00	0	S
 2007: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2008: Zone America/Port-au-Prince -4:49:20 -	LMT	1890
 2009: 			-4:49	-	PPMT	1917 Jan 24 12:00 # P-a-P MT
 2010: 			-5:00	Haiti	E%sT
 2011: 
 2012: # Honduras
 2013: # Shanks says 1921 Jan 1; go with Whitman's more precise Apr 1.
 2014: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2015: Zone America/Tegucigalpa -5:48:52 -	LMT	1921 Apr
 2016: 			-6:00	Salv	C%sT
 2017: #
 2018: # Great Swan I ceded by US to Honduras in 1972
 2019: 
 2020: # Jamaica
 2021: 
 2022: # From Bob Devine (1988-01-28):
 2023: # Follows US rules.
 2024: 
 2025: # From U. S. Naval Observatory (1989-01-19):
 2026: # JAMAICA             5 H  BEHIND UTC
 2027: 
 2028: # From Shanks:
 2029: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2030: Zone	America/Jamaica	-5:07:12 -	LMT	1890		# Kingston
 2031: 			-5:07:12 -	KMT	1912 Feb    # Kingston Mean Time
 2032: 			-5:00	-	EST	1974 Apr 28 2:00
 2033: 			-5:00	US	E%sT	1984
 2034: 			-5:00	-	EST
 2035: 
 2036: # Martinique
 2037: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2038: Zone America/Martinique	-4:04:20 -      LMT	1890		# Fort-de-France
 2039: 			-4:04:20 -	FFMT	1911 May     # Fort-de-France MT
 2040: 			-4:00	-	AST	1980 Apr  6
 2041: 			-4:00	1:00	ADT	1980 Sep 28
 2042: 			-4:00	-	AST
 2043: 
 2044: # Montserrat
 2045: # From Paul Eggert (1997-08-31):
 2046: # Recent volcanic eruptions have forced evacuation of Plymouth, the capital.
 2047: # Luckily, Olveston, the current de facto capital, has the same longitude.
 2048: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2049: Zone America/Montserrat	-4:08:52 -	LMT	1911 Jul 1 0:01   # Olveston
 2050: 			-4:00	-	AST
 2051: 
 2052: # Nicaragua
 2053: #
 2054: # From Steffen Thorsen (1998-12-29):
 2055: # Nicaragua seems to be back at -6:00 but I have not been able to find when
 2056: # they changed from -5:00.
 2057: #
 2058: # From Steffen Thorsen (2005-04-12):
 2059: # I've got reports from 8 different people that Nicaragua just started
 2060: # DST on Sunday 2005-04-10, in order to save energy because of
 2061: # expensive petroleum.  The exact end date for DST is not yet
 2062: # announced, only "September" but some sites also say "mid-September".
 2063: # Some background information is available on the President's official site:
 2064: # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm
 2065: # The Decree, no 23-2005 is available here:
 2066: # 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
 2067: #
 2068: # From Paul Eggert (2005-05-01):
 2069: # The decree doesn't say anything about daylight saving, but for now let's
 2070: # assume that it is daylight saving and that they'll switch back on the
 2071: # 3rd Sunday in September.
 2072: #
 2073: # From Gwillim Law (2005-04-21):
 2074: # The Associated Press story on the time change, which can be found at
 2075: # http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html
 2076: # and elsewhere, says (fifth paragraph, translated from Spanish):  "The last
 2077: # time that a change of clocks was applied to save energy was in the year 2000
 2078: # during the Arnoldo Aleman administration."...
 2079: # The northamerica file says that Nicaragua has been on UTC-6 continuously
 2080: # since December 1998.  I wasn't able to find any details of Nicaraguan time
 2081: # changes in 2000.  Perhaps a note could be added to the northamerica file, to
 2082: # the effect that we have indirect evidence that DST was observed in 2000.
 2083: #
 2084: # From Jesper Norgaard Welen (2005-11-02):
 2085: # Nicaragua left DST the 2005-10-02 at 00:00 (local time).
 2086: # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm
 2087: # (2005-09-26)
 2088: #
 2089: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 2090: Rule	Nic	1979	1980	-	Mar	Sun>=16	0:00	1:00	D
 2091: Rule	Nic	1979	1980	-	Jun	Mon>=23	0:00	0	S
 2092: Rule	Nic	1992	only	-	Jan	 1	4:00	1:00	D
 2093: Rule	Nic	1992	only	-	Sep	24	0:00	0	S
 2094: Rule	Nic	2005	only	-	Apr	10	0:00	1:00	D
 2095: Rule	Nic	2005	only	-	Oct	 2	0:00	0	S
 2096: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2097: Zone	America/Managua	-5:45:08 -	LMT	1890
 2098: 			-5:45:12 -	MMT	1934 Jun 23 # Managua Mean Time?
 2099: 			-6:00	-	CST	1973 May
 2100: 			-5:00	-	EST	1975 Feb 16
 2101: 			-6:00	Nic	C%sT	1993 Jan 1 4:00
 2102: 			-5:00	-	EST	1998 Dec
 2103: 			-6:00	Nic	C%sT
 2104: 
 2105: # Panama
 2106: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2107: Zone	America/Panama	-5:18:08 -	LMT	1890
 2108: 			-5:19:36 -	CMT	1908 Apr 22   # Colon Mean Time
 2109: 			-5:00	-	EST
 2110: 
 2111: # Puerto Rico
 2112: # There are too many San Juans elsewhere, so we'll use `Puerto_Rico'.
 2113: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2114: Zone America/Puerto_Rico -4:24:25 -	LMT	1899 Mar 28 12:00    # San Juan
 2115: 			-4:00	-	AST	1942 May  3
 2116: 			-4:00	1:00	AWT	1945 Sep 30  2:00
 2117: 			-4:00	-	AST
 2118: 
 2119: # St Kitts-Nevis
 2120: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2121: Zone America/St_Kitts	-4:10:52 -	LMT	1912 Mar 2	# Basseterre
 2122: 			-4:00	-	AST
 2123: 
 2124: # St Lucia
 2125: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2126: Zone America/St_Lucia	-4:04:00 -	LMT	1890		# Castries
 2127: 			-4:04:00 -	CMT	1912	    # Castries Mean Time
 2128: 			-4:00	-	AST
 2129: 
 2130: # St Pierre and Miquelon
 2131: # There are too many St Pierres elsewhere, so we'll use `Miquelon'.
 2132: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2133: Zone America/Miquelon	-3:44:40 -	LMT	1911 May 15	# St Pierre
 2134: 			-4:00	-	AST	1980 May
 2135: 			-3:00	-	PMST	1987 # Pierre & Miquelon Time
 2136: 			-3:00	Canada	PM%sT
 2137: 
 2138: # St Vincent and the Grenadines
 2139: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2140: Zone America/St_Vincent	-4:04:56 -	LMT	1890		# Kingstown
 2141: 			-4:04:56 -	KMT	1912	   # Kingstown Mean Time
 2142: 			-4:00	-	AST
 2143: 
 2144: # Turks and Caicos
 2145: # From Paul Eggert (1998-08-06):
 2146: # Shanks says they use US DST rules, but IATA SSIM (1991/1998)
 2147: # says they switch at midnight.  Go with IATA SSIM.
 2148: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 2149: Rule	TC	1979	1986	-	Apr	lastSun	0:00	1:00	D
 2150: Rule	TC	1979	max	-	Oct	lastSun	0:00	0	S
 2151: Rule	TC	1987	max	-	Apr	Sun>=1	0:00	1:00	D
 2152: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2153: Zone America/Grand_Turk	-4:44:32 -	LMT	1890
 2154: 			-5:07:12 -	KMT	1912 Feb    # Kingston Mean Time
 2155: 			-5:00	TC	E%sT
 2156: 
 2157: # British Virgin Is
 2158: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2159: Zone America/Tortola	-4:18:28 -	LMT	1911 Jul    # Road Town
 2160: 			-4:00	-	AST
 2161: 
 2162: # Virgin Is
 2163: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2164: Zone America/St_Thomas	-4:19:44 -	LMT	1911 Jul    # Charlotte Amalie
 2165: 			-4:00	-	AST