File:  [DragonFly] / src / share / zoneinfo / northamerica
Revision 1.6: download - view: text, annotated - select for diffs
Tue Nov 29 08:54:32 2005 UTC (8 years, 9 months ago) by swildner
Branches: MAIN
CVS tags: HEAD, DragonFly_RELEASE_1_4
Sync zoneinfo database with tzdata2005o from elsie.

asia:           7.86 -> 7.88
northamerica:   7.80 -> 7.82
southamerica:   7.62 -> 7.63

From the announcement:

"These incorporate the Georgia, Cuba, Nicaragua, and Jordan changes
 circulated over the past two weeks by Paul Eggert on the time zone
 mailing list."

    1: # @(#)northamerica	7.82
    2: # also includes Central America and the Caribbean
    3: 
    4: # This data is by no means authoritative; if you think you know better,
    5: # go ahead and edit the file (and please send any changes to
    6: # tz@elsie.nci.nih.gov for general use in the future).
    7: 
    8: # From Paul Eggert (1999-03-22):
    9: # A reliable and entertaining source about time zones is
   10: # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
   11: 
   12: ###############################################################################
   13: 
   14: # United States
   15: 
   16: # From Paul Eggert (1999-03-31):
   17: # Howse writes (pp 121-125) that time zones were invented by
   18: # Professor Charles Ferdinand Dowd (1825-1904),
   19: # Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).
   20: # His pamphlet ``A System of National Time for Railroads'' (1870)
   21: # was the result of his proposals at the Convention of Railroad Trunk Lines
   22: # in New York City (1869-10).  His 1870 proposal was based on Washington, DC,
   23: # but in 1872-05 he moved the proposed origin to Greenwich.
   24: # His proposal was adopted by the railroads on 1883-11-18 at 12:00,
   25: # and the most of the country soon followed suit.
   26: 
   27: # From Paul Eggert (2005-04-16):
   28: # That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
   29: # See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).
   30: 
   31: # From Paul Eggert (1995-12-19):
   32: # A good source for time zone historical data in the US is
   33: # Thomas G. Shanks, The American Atlas (5th edition),
   34: # San Diego: ACS Publications, Inc. (1991).
   35: # Make sure you have the errata sheet; the book is somewhat useless without it.
   36: # It is the source for most of the pre-1991 US and Puerto Rico entries below.
   37: 
   38: # From Paul Eggert (2001-03-06):
   39: # Daylight Saving Time was first suggested as a joke by Benjamin Franklin
   40: # in his whimsical essay ``An Economical Project for Diminishing the Cost
   41: # of Light'' published in the Journal de Paris (1784-04-26).
   42: # Not everyone is happy with the results:
   43: #
   44: #	I don't really care how time is reckoned so long as there is some
   45: #	agreement about it, but I object to being told that I am saving
   46: #	daylight when my reason tells me that I am doing nothing of the kind.
   47: #	I even object to the implication that I am wasting something
   48: #	valuable if I stay in bed after the sun has risen.  As an admirer
   49: #	of moonlight I resent the bossy insistence of those who want to
   50: #	reduce my time for enjoying it.  At the back of the Daylight Saving
   51: #	scheme I detect the bony, blue-fingered hand of Puritanism, eager
   52: #	to push people into bed earlier, and get them up earlier, to make
   53: #	them healthy, wealthy and wise in spite of themselves.
   54: #
   55: #	-- Robertson Davies, The diary of Samuel Marchbanks,
   56: #	   Clarke, Irwin (1947), XIX, Sunday
   57: #
   58: # For more about the first ten years of DST in the United States, see
   59: # Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html">
   60: # Ten years of daylight saving from the Pittsburgh standpoint
   61: # (Carnegie Library of Pittsburgh, 1927)</a>.
   62: #
   63: # Shanks says that DST was called "War Time" in the US in 1918 and 1919.
   64: # However, DST was imposed by the Standard Time Act of 1918, which
   65: # was the first nationwide legal time standard, and apparently
   66: # time was just called "Standard Time" or "Daylight Saving Time".
   67: 
   68: # From Arthur David Olson:
   69: # US Daylight Saving Time ended on the last Sunday of *October* in 1974.
   70: # See, for example, the front page of the Saturday, 1974-10-26
   71: # and Sunday, 1974-10-27 editions of the Washington Post.
   72: 
   73: # From Arthur David Olson:
   74: # Before the Uniform Time Act of 1966 took effect in 1967, observance of
   75: # Daylight Saving Time in the US was by local option, except during wartime.
   76: 
   77: # From Arthur David Olson (2000-09-25):
   78: # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
   79: # In the introduction, Oboler spoke of "Eastern Peace Time."
   80: # An AltaVista search turned up
   81: # <a href="http://rowayton.org/rhs/hstaug45.html">:
   82: # "When the time is announced over the radio now, it is 'Eastern Peace
   83: # Time' instead of the old familiar 'Eastern War Time.'  Peace is wonderful."
   84: # </a> (August 1945) by way of confirmation.
   85: 
   86: # From Joseph Gallant citing
   87: # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
   88: # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
   89: # to switch to London for Attlee's address, but the American people
   90: # never got to hear his speech live. According to one press account,
   91: # CBS' Bob Trout was first to announce the word of Japan's surrender,
   92: # but a few seconds later, NBC, ABC and Mutual also flashed the word
   93: # of surrender, all of whom interrupting the bells of Big Ben in
   94: # London which were to precede Mr. Attlee's speech.
   95: 
   96: # From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout.  From
   97: # Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times:
   98: #
   99: # ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender.
  100: # Any announcement from Asia would reach St. John's New York newsroom on a
  101: # wire service teletype machine, which had prescribed signals for major news.
  102: # Associated Press, for example, would ring five bells before spewing out
  103: # typed copy of an important story, and 10 bells for news "of transcendental
  104: # importance."
  105: #
  106: # On Aug. 14, stalling while talking steadily into the NBC networks' open
  107: # microphone, St. John heard five bells and waited only to hear a sixth bell,
  108: # before announcing confidently: "Ladies and gentlemen, World War II is over.
  109: # The Japanese have agreed to our surrender terms."
  110: #
  111: # He had scored a 20-second scoop on other broadcasters.
  112: 
  113: # From Arthur David Olson (2005-08-22):
  114: # Paul has been careful to use the "US" rules only in those locations
  115: # that are part of the United States; this reflects the real scope of
  116: # U.S. government action.  So even though the "US" rules have changed
  117: # in the latest release, other countries won't be affected.
  118: 
  119: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
  120: Rule	US	1918	1919	-	Mar	lastSun	2:00	1:00	D
  121: Rule	US	1918	1919	-	Oct	lastSun	2:00	0	S
  122: Rule	US	1942	only	-	Feb	9	2:00	1:00	W # War
  123: Rule	US	1945	only	-	Aug	14	23:00u	1:00	P # Peace
  124: Rule	US	1945	only	-	Sep	30	2:00	0	S
  125: Rule	US	1967	2006	-	Oct	lastSun	2:00	0	S
  126: Rule	US	1967	1973	-	Apr	lastSun	2:00	1:00	D
  127: Rule	US	1974	only	-	Jan	6	2:00	1:00	D
  128: Rule	US	1975	only	-	Feb	23	2:00	1:00	D
  129: Rule	US	1976	1986	-	Apr	lastSun	2:00	1:00	D
  130: Rule	US	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
  131: Rule	US	2007	max	-	Mar	Sun>=8	2:00	1:00	D
  132: Rule	US	2007	max	-	Nov	Sun>=1	2:00	0	S
  133: 
  134: # From Bob Devine (1988-01-28):
  135: # ...Alaska (and Hawaii) had the timezone names changed in 1967.
  136: #    old			 new
  137: #    Pacific Standard Time(PST)  -same-
  138: #    Yukon Standard Time(YST)    -same-
  139: #    Central Alaska S.T. (CAT)   Alaska-Hawaii St[an]dard Time (AHST)
  140: #    Nome Standard Time (NT)     Bering Standard Time (BST)
  141: #
  142: # ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz.
  143: #    The YST zone now covers nearly all of the state, AHST just part
  144: #    of the Aleutian islands.   No DST.
  145: 
  146: # From Paul Eggert (1995-12-19):
  147: # The tables below use `NST', not `NT', for Nome Standard Time.
  148: # I invented `CAWT' for Central Alaska War Time.
  149: 
  150: # From U. S. Naval Observatory (1989-01-19):
  151: # USA  EASTERN       5 H  BEHIND UTC    NEW YORK, WASHINGTON
  152: # USA  EASTERN       4 H  BEHIND UTC    APR 3 - OCT 30
  153: # USA  CENTRAL       6 H  BEHIND UTC    CHICAGO, HOUSTON
  154: # USA  CENTRAL       5 H  BEHIND UTC    APR 3 - OCT 30
  155: # USA  MOUNTAIN      7 H  BEHIND UTC    DENVER
  156: # USA  MOUNTAIN      6 H  BEHIND UTC    APR 3 - OCT 30
  157: # USA  PACIFIC       8 H  BEHIND UTC    L.A., SAN FRANCISCO
  158: # USA  PACIFIC       7 H  BEHIND UTC    APR 3 - OCT 30
  159: # USA  ALASKA STD    9 H  BEHIND UTC    MOST OF ALASKA     (AKST)
  160: # USA  ALASKA STD    8 H  BEHIND UTC    APR 3 - OCT 30 (AKDT)
  161: # USA  ALEUTIAN     10 H  BEHIND UTC    ISLANDS WEST OF 170W
  162: # USA  - " -         9 H  BEHIND UTC    APR 3 - OCT 30
  163: # USA  HAWAII       10 H  BEHIND UTC
  164: # USA  BERING       11 H  BEHIND UTC    SAMOA, MIDWAY
  165: 
  166: # From Arthur David Olson (1989-01-21):
  167: # The above dates are for 1988.
  168: # Note the "AKST" and "AKDT" abbreviations, the claim that there's
  169: # no DST in Samoa, and the claim that there is DST in Alaska and the
  170: # Aleutians.
  171: 
  172: # From Arthur David Olson (1988-02-13):
  173: # Legal standard time zone names, from United States Code (1982 Edition and
  174: # Supplement III), Title 15, Chapter 6, Section 260 and forward.  First, names
  175: # up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966
  176: # took effect), as explained in sections 263 and 261:
  177: #	(none)
  178: #	United States standard eastern time
  179: #	United States standard mountain time
  180: #	United States standard central time
  181: #	United States standard Pacific time
  182: #	(none)
  183: #	United States standard Alaska time
  184: #	(none)
  185: # Next, names from 1967-04-01 until 1983-11-30 (the date for
  186: # public law 98-181):
  187: #	Atlantic standard time
  188: #	eastern standard time
  189: #	central standard time
  190: #	mountain standard time
  191: #	Pacific standard time
  192: #	Yukon standard time
  193: #	Alaska-Hawaii standard time
  194: #	Bering standard time
  195: # And after 1983-11-30:
  196: #	Atlantic standard time
  197: #	eastern standard time
  198: #	central standard time
  199: #	mountain standard time
  200: #	Pacific standard time
  201: #	Alaska standard time
  202: #	Hawaii-Aleutian standard time
  203: #	Samoa standard time
  204: # The law doesn't give abbreviations.
  205: #
  206: # From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
  207: # Public law 106-564 (2000-12-23) introduced the abbreviation
  208: # "Chamorro Standard Time" for time in Guam and the Northern Marianas.
  209: # See the file "australasia".
  210:  
  211: # From Arthur David Olson, 2005-08-09
  212: # The following was signed into law on 2005-08-08.
  213: #
  214: # H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
  215: #   (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15
  216: #   U.S.C. 260a(a)) is amended--
  217: #     (1) by striking `first Sunday of April' and inserting `second
  218: #     Sunday of March'; and
  219: #     (2) by striking `last Sunday of October' and inserting `first
  220: #     Sunday of November'.
  221: #   (b) Effective Date- Subsection (a) shall take effect 1 year after the
  222: #   date of enactment of this Act or March 1, 2007, whichever is later.
  223: #   (c) Report to Congress- Not later than 9 months after the effective
  224: #   date stated in subsection (b), the Secretary shall report to Congress
  225: #   on the impact of this section on energy consumption in the United
  226: #   States.
  227: #   (d) Right to Revert- Congress retains the right to revert the
  228: #   Daylight Saving Time back to the 2005 time schedules once the
  229: #   Department study is complete.
  230: 
  231: # US eastern time, represented by New York
  232: 
  233: # Connecticut, Delaware, District of Columbia, most of Florida,
  234: # Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky
  235: # (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts,
  236: # New Hampshire, New Jersey, New York, North Carolina, Ohio,
  237: # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee,
  238: # Vermont, Virginia, West Virginia
  239: 
  240: # From Dave Cantor (2004-11-02):
  241: # Early this summer I had the occasion to visit the Mount Washington
  242: # Observatory weather station atop (of course!) Mount Washington [, NH]....
  243: # One of the staff members said that the station was on Eastern Standard Time
  244: # and didn't change their clocks for Daylight Saving ... so that their
  245: # reports will always have times which are 5 hours behind UTC.
  246: 
  247: # From Paul Eggert (2005-08-26):
  248: # According to today's Huntsville Times
  249: # <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1>
  250: # a few towns on Alabama's "eastern border with Georgia, such as Phenix City
  251: # in Russell County, Lanett in Chambers County and some towns in Lee County,
  252: # set their watches and clocks on Eastern time."  It quotes H.H. "Bubba"
  253: # Roberts, city administrator in Phenix City. as saying "We are in the Central
  254: # time zone, but we do go by the Eastern time zone because so many people work
  255: # in Columbus." 
  256: 
  257: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
  258: Rule	NYC	1920	only	-	Mar	lastSun	2:00	1:00	D
  259: Rule	NYC	1920	only	-	Oct	lastSun	2:00	0	S
  260: Rule	NYC	1921	1966	-	Apr	lastSun	2:00	1:00	D
  261: Rule	NYC	1921	1954	-	Sep	lastSun	2:00	0	S
  262: Rule	NYC	1955	1966	-	Oct	lastSun	2:00	0	S
  263: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  264: Zone America/New_York	-4:56:02 -	LMT	1883 Nov 18 12:03:58
  265: 			-5:00	US	E%sT	1920
  266: 			-5:00	NYC	E%sT	1942
  267: 			-5:00	US	E%sT	1946
  268: 			-5:00	NYC	E%sT	1967
  269: 			-5:00	US	E%sT
  270: 
  271: # US central time, represented by Chicago
  272: 
  273: # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
  274: # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
  275: # Washington counties), Illinois, western Indiana
  276: # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
  277: # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
  278: # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
  279: # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
  280: # western Tennessee, most of Texas, Wisconsin
  281: 
  282: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
  283: Rule	Chicago	1920	only	-	Jun	13	2:00	1:00	D
  284: Rule	Chicago	1920	1921	-	Oct	lastSun	2:00	0	S
  285: Rule	Chicago	1921	only	-	Mar	lastSun	2:00	1:00	D
  286: Rule	Chicago	1922	1966	-	Apr	lastSun	2:00	1:00	D
  287: Rule	Chicago	1922	1954	-	Sep	lastSun	2:00	0	S
  288: Rule	Chicago	1955	1966	-	Oct	lastSun	2:00	0	S
  289: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  290: Zone America/Chicago	-5:50:36 -	LMT	1883 Nov 18 12:09:24
  291: 			-6:00	US	C%sT	1920
  292: 			-6:00	Chicago	C%sT	1936 Mar  1 2:00
  293: 			-5:00	-	EST	1936 Nov 15 2:00
  294: 			-6:00	Chicago	C%sT	1942
  295: 			-6:00	US	C%sT	1946
  296: 			-6:00	Chicago	C%sT	1967
  297: 			-6:00	US	C%sT
  298: # Oliver County, ND switched from mountain to central time on 1992-10-25.
  299: Zone America/North_Dakota/Center -6:45:12 - LMT	1883 Nov 18 12:14:48
  300: 			-7:00	US	M%sT	1992 Oct 25 02:00
  301: 			-6:00	US	C%sT
  302: 
  303: # US mountain time, represented by Denver
  304: #
  305: # Colorado, far western Kansas, Montana, western
  306: # Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City),
  307: # New Mexico, southwestern North Dakota, far eastern Oregon,
  308: # western South Dakota, far western Texas (El Paso County, Hudspeth County,
  309: # and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming
  310: #
  311: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
  312: Rule	Denver	1920	1921	-	Mar	lastSun	2:00	1:00	D
  313: Rule	Denver	1920	only	-	Oct	lastSun	2:00	0	S
  314: Rule	Denver	1921	only	-	May	22	2:00	0	S
  315: Rule	Denver	1965	1966	-	Apr	lastSun	2:00	1:00	D
  316: Rule	Denver	1965	1966	-	Oct	lastSun	2:00	0	S
  317: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  318: Zone America/Denver	-6:59:56 -	LMT	1883 Nov 18 12:00:04
  319: 			-7:00	US	M%sT	1920
  320: 			-7:00	Denver	M%sT	1942
  321: 			-7:00	US	M%sT	1946
  322: 			-7:00	Denver	M%sT	1967
  323: 			-7:00	US	M%sT
  324: 
  325: # US Pacific time, represented by Los Angeles
  326: #
  327: # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
  328: # Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties),
  329: # most of Nevada, most of Oregon, and Washington
  330: #
  331: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
  332: Rule	CA	1948	only	-	Mar	14	2:00	1:00	D
  333: Rule	CA	1949	only	-	Jan	 1	2:00	0	S
  334: Rule	CA	1950	1966	-	Apr	lastSun	2:00	1:00	D
  335: Rule	CA	1950	1961	-	Sep	lastSun	2:00	0	S
  336: Rule	CA	1962	1966	-	Oct	lastSun	2:00	0	S
  337: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  338: Zone America/Los_Angeles -7:52:58 -	LMT	1883 Nov 18 12:07:02
  339: 			-8:00	US	P%sT	1946
  340: 			-8:00	CA	P%sT	1967
  341: 			-8:00	US	P%sT
  342: 
  343: # Alaska
  344: # AK%sT is the modern abbreviation for -9:00 per USNO.
  345: #
  346: # From Paul Eggert (2001-05-30):
  347: # Howse writes that Alaska switched from the Julian to the Gregorian calendar,
  348: # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
  349: # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian,
  350: # also a Friday.  Include only the time zone part of this transition,
  351: # ignoring the switch from Julian to Gregorian, since we can't represent
  352: # the Julian calendar.
  353: #
  354: # As far as we know, none of the exact locations mentioned below were
  355: # permanently inhabited in 1867 by anyone using either calendar.
  356: # (Yakutat was colonized by the Russians in 1799, but the settlement
  357: # was destroyed in 1805 by a Yakutat-kon war party.)  However, there
  358: # were nearby inhabitants in some cases and for our purposes perhaps
  359: # it's best to simply use the official transition.
  360: #
  361: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  362: Zone America/Juneau	 15:02:19 -	LMT	1867 Oct 18
  363: 			 -8:57:41 -	LMT	1900 Aug 20 12:00
  364: 			 -8:00	-	PST	1942
  365: 			 -8:00	US	P%sT	1946
  366: 			 -8:00	-	PST	1969
  367: 			 -8:00	US	P%sT	1983 Oct 30 2:00
  368: 			 -9:00	US	Y%sT	1983 Nov 30
  369: 			 -9:00	US	AK%sT
  370: Zone America/Yakutat	 14:41:05 -	LMT	1867 Oct 18
  371: 			 -9:18:55 -	LMT	1900 Aug 20 12:00
  372: 			 -9:00	-	YST	1942
  373: 			 -9:00	US	Y%sT	1946
  374: 			 -9:00	-	YST	1969
  375: 			 -9:00	US	Y%sT	1983 Nov 30
  376: 			 -9:00	US	AK%sT
  377: Zone America/Anchorage	 14:00:24 -	LMT	1867 Oct 18
  378: 			 -9:59:36 -	LMT	1900 Aug 20 12:00
  379: 			-10:00	-	CAT	1942
  380: 			-10:00	US	CAT/CAWT 1946
  381: 			-10:00	-	CAT	1967 Apr
  382: 			-10:00	-	AHST	1969
  383: 			-10:00	US	AH%sT	1983 Oct 30 2:00
  384: 			 -9:00	US	Y%sT	1983 Nov 30
  385: 			 -9:00	US	AK%sT
  386: Zone America/Nome	 12:58:21 -	LMT	1867 Oct 18
  387: 			-11:01:38 -	LMT	1900 Aug 20 12:00
  388: 			-11:00	-	NST	1942
  389: 			-11:00	US	N%sT	1946
  390: 			-11:00	-	NST	1967 Apr
  391: 			-11:00	-	BST	1969
  392: 			-11:00	US	B%sT	1983 Oct 30 2:00
  393: 			 -9:00	US	Y%sT	1983 Nov 30
  394: 			 -9:00	US	AK%sT
  395: Zone America/Adak	 12:13:21 -	LMT	1867 Oct 18
  396: 			-11:46:38 -	LMT	1900 Aug 20 12:00
  397: 			-11:00	-	NST	1942
  398: 			-11:00	US	N%sT	1946
  399: 			-11:00	-	NST	1967 Apr
  400: 			-11:00	-	BST	1969
  401: 			-11:00	US	B%sT	1983 Oct 30 2:00
  402: 			-10:00	US	AH%sT	1983 Nov 30
  403: 			-10:00	US	HA%sT
  404: # The following switches don't quite make our 1970 cutoff.
  405: #
  406: # Shanks writes that part of southwest Alaska (e.g. Aniak)
  407: # switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
  408: # and another part (e.g. Akiak) made the same switch five weeks later.
  409: #
  410: # From David Flater (2004-11-09):
  411: # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska
  412: # Historic Preservation Commission, provided this information, which
  413: # suggests that Unalaska deviated from statutory time from early 1967
  414: # possibly until 1983:
  415: #
  416: #  Minutes of the Unalaska City Council Meeting, January 10, 1967:
  417: #  "Except for St. Paul and Akutan, Unalaska is the only important
  418: #  location not on Alaska Standard Time.  The following resolution was
  419: #  made by William Robinson and seconded by Henry Swanson:  Be it
  420: #  resolved that the City of Unalaska hereby goes to Alaska Standard
  421: #  Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday,
  422: #  January 14, Alaska Standard Time.)  This resolution was passed with
  423: #  three votes for and one against."
  424: 
  425: # Hawaii
  426: #
  427: # From Arthur David Olson:
  428: # And then there's Hawaii.
  429: # DST was observed for one day in 1933;
  430: # standard time was changed by half an hour in 1947;
  431: # it's always standard as of 1986.
  432: #
  433: # From Paul Eggert:
  434: # Shanks says the 1933 experiment lasted for three weeks.  Go with Shanks.
  435: #
  436: Zone Pacific/Honolulu	-10:31:26 -	LMT	1900 Jan  1 12:00
  437: 			-10:30	-	HST	1933 Apr 30 2:00
  438: 			-10:30	1:00	HDT	1933 May 21 2:00
  439: 			-10:30	US	H%sT	1947 Jun  8 2:00
  440: 			-10:00	-	HST
  441: 
  442: # Now we turn to US areas that have diverged from the consensus since 1970.
  443: 
  444: # Arizona mostly uses MST.
  445: 
  446: # From Paul Eggert (2002-10-20):
  447: #
  448: # The information in the rest of this paragraph is derived from the
  449: # <a href="http://www.dlapr.lib.az.us/links/daylight.htm">
  450: # Daylight Saving Time web page (2002-01-23)</a> maintained by the
  451: # Arizona State Library, Archives and Public Records.
  452: # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
  453: # time, but by federal law railroads, airlines, bus lines, military
  454: # personnel, and some engaged in interstate commerce continued to
  455: # observe war (i.e., daylight saving) time.  The 1944-03-17 Phoenix
  456: # Gazette says that was the date the law changed, and that 04-01 was
  457: # the date the state's clocks would change.  In 1945 the State of
  458: # Arizona used standard time all year, again with exceptions only as
  459: # mandated by federal law.  Arizona observed DST in 1967, but Arizona
  460: # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
  461: #
  462: # Shanks says the 1944 experiment came to an end on 1944-03-17.
  463: # Go with the Arizona State Library instead.
  464: 
  465: Zone America/Phoenix	-7:28:18 -	LMT	1883 Nov 18 11:31:42
  466: 			-7:00	US	M%sT	1944 Jan  1 00:01
  467: 			-7:00	-	MST	1944 Apr  1 00:01
  468: 			-7:00	US	M%sT	1944 Oct  1 00:01
  469: 			-7:00	-	MST	1967
  470: 			-7:00	US	M%sT	1968 Mar 21
  471: 			-7:00	-	MST
  472: # From Arthur David Olson (1988-02-13):
  473: # A writer from the Inter Tribal Council of Arizona, Inc.,
  474: # notes in private correspondence dated 1987-12-28 that "Presently, only the
  475: # Navajo Nation participates in the Daylight Saving Time policy, due to its
  476: # large size and location in three states."  (The "only" means that other
  477: # tribal nations don't use DST.)
  478: 
  479: Link America/Denver America/Shiprock
  480: 
  481: # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
  482: # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
  483: # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
  484: # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
  485: # Teton, Twin Falls, Valley, Washington counties) and eastern Oregon
  486: # switched four weeks late in 1974.
  487: #
  488: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  489: Zone America/Boise	-7:44:49 -	LMT	1883 Nov 18 12:15:11
  490: 			-8:00	US	P%sT	1923 May 13 2:00
  491: 			-7:00	US	M%sT	1974
  492: 			-7:00	-	MST	1974 Feb  3 2:00
  493: 			-7:00	US	M%sT
  494: 
  495: # Indiana
  496: #
  497: # For a map of Indiana's time zone regions, see:
  498: # <a href="http://www.mccsc.edu/time.html">
  499: # What time is it in Indiana?
  500: # </a> (2005-05-03)
  501: #
  502: # From Paul Eggert (2005-08-22):
  503: # Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
  504: # with the following exceptions:
  505: #
  506: # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
  507: #   Vandenburgh, and Warrick counties have been like America/Chicago.
  508: #
  509: # - Dearborn and Ohio counties have been like America/New_York.
  510: #
  511: # - Clark, Floyd, and Harrison counties have been like
  512: #   America/Kentucky/Louisville.
  513: #
  514: # - Crawford, Starke, and Switzerland counties have their own time zone
  515: #   histories as noted below.
  516: #
  517: # Shanks partitions Indiana into 345 regions, each with its own time history,
  518: # and writes ``Even newspaper reports present contradictory information.''
  519: # Fortunately, most of the complexity occurred before our cutoff date of 1970.
  520: #
  521: # Other than Indianapolis, the Indiana place names are so nondescript
  522: # that they would be ambiguous if we left them at the `America' level.
  523: # So we reluctantly put them all in a subdirectory `America/Indiana'.
  524: 
  525: # From Paul Eggert (2005-08-16):
  526: # http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006,
  527: # and that many counties may switch either to Central or to Eastern time.
  528: # The county-by-county decisions have not been made yet, so for now assume
  529: # that no counties will switch: this assumption is most likely wrong,
  530: # but it's the best we can do for now.
  531: 
  532: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
  533: Rule Indianapolis 1941	only	-	Jun	22	2:00	1:00	D
  534: Rule Indianapolis 1941	1954	-	Sep	lastSun	2:00	0	S
  535: Rule Indianapolis 1946	1954	-	Apr	lastSun	2:00	1:00	D
  536: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  537: Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22
  538: 			-6:00	US	C%sT	1920
  539: 			-6:00 Indianapolis C%sT	1942
  540: 			-6:00	US	C%sT	1946
  541: 			-6:00 Indianapolis C%sT	1955 Apr 24 2:00
  542: 			-5:00	-	EST	1957 Sep 29 2:00
  543: 			-6:00	-	CST	1958 Apr 27 2:00
  544: 			-5:00	-	EST	1969
  545: 			-5:00	US	E%sT	1971
  546: 			-5:00	-	EST	2006
  547: 			-5:00	US	E%sT
  548: #
  549: # Part of Crawford County, Indiana, last observed DST in 1975,
  550: # and left its clocks alone in 1974.
  551: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
  552: Rule	Marengo	1951	only	-	Apr	lastSun	2:00	1:00	D
  553: Rule	Marengo	1951	only	-	Sep	lastSun	2:00	0	S
  554: Rule	Marengo	1954	1960	-	Apr	lastSun	2:00	1:00	D
  555: Rule	Marengo	1954	1960	-	Sep	lastSun	2:00	0	S
  556: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  557: Zone America/Indiana/Marengo -5:45:23 -	LMT	1883 Nov 18 12:14:37
  558: 			-6:00	US	C%sT	1951
  559: 			-6:00	Marengo	C%sT	1961 Apr 30 2:00
  560: 			-5:00	-	EST	1969
  561: 			-5:00	US	E%sT	1974 Jan  6 2:00
  562: 			-6:00	1:00	CDT	1974 Oct 27 2:00
  563: 			-5:00	US	E%sT	1976
  564: 			-5:00	-	EST	2006
  565: 			-5:00	US	E%sT
  566: #
  567: # Starke County, Indiana
  568: # From Arthur David Olson (1991-10-28):
  569: # An article on page A3 of the Sunday, 1991-10-27 Washington Post
  570: # notes that Starke County switched from Central time to Eastern time as of
  571: # 1991-10-27.
  572: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
  573: Rule	Starke	1947	1961	-	Apr	lastSun	2:00	1:00	D
  574: Rule	Starke	1947	1954	-	Sep	lastSun	2:00	0	S
  575: Rule	Starke	1955	1956	-	Oct	lastSun	2:00	0	S
  576: Rule	Starke	1957	1958	-	Sep	lastSun	2:00	0	S
  577: Rule	Starke	1959	1961	-	Oct	lastSun	2:00	0	S
  578: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  579: Zone America/Indiana/Knox -5:46:30 -	LMT	1883 Nov 18 12:13:30
  580: 			-6:00	US	C%sT	1947
  581: 			-6:00	Starke	C%sT	1962 Apr 29 2:00
  582: 			-5:00	-	EST	1963 Oct 27 2:00
  583: 			-6:00	US	C%sT	1991 Oct 27 2:00
  584: 			-5:00	-	EST	2006
  585: 			-5:00	US	E%sT
  586: #
  587: # Switzerland County, Indiana, last observed DST in 1972.
  588: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  589: Zone America/Indiana/Vevay -5:40:16 -	LMT	1883 Nov 18 12:19:44
  590: 			-6:00	US	C%sT	1954 Apr 25 2:00
  591: 			-5:00	-	EST	1969
  592: 			-5:00	US	E%sT	1973
  593: 			-5:00	-	EST	2006
  594: 			-5:00	US	E%sT
  595: 
  596: # Part of Kentucky left its clocks alone in 1974.
  597: # This also includes Clark, Floyd, and Harrison counties in Indiana.
  598: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
  599: Rule Louisville	1921	only	-	May	1	2:00	1:00	D
  600: Rule Louisville	1921	only	-	Sep	1	2:00	0	S
  601: Rule Louisville	1941	1961	-	Apr	lastSun	2:00	1:00	D
  602: Rule Louisville	1941	only	-	Sep	lastSun	2:00	0	S
  603: Rule Louisville	1946	only	-	Jun	2	2:00	0	S
  604: Rule Louisville	1950	1955	-	Sep	lastSun	2:00	0	S
  605: Rule Louisville	1956	1960	-	Oct	lastSun	2:00	0	S
  606: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  607: Zone America/Kentucky/Louisville -5:43:02 -	LMT	1883 Nov 18 12:16:58
  608: 			-6:00	US	C%sT	1921
  609: 			-6:00 Louisville C%sT	1942
  610: 			-6:00	US	C%sT	1946
  611: 			-6:00 Louisville C%sT	1961 Jul 23 2:00
  612: 			-5:00	-	EST	1968
  613: 			-5:00	US	E%sT	1974 Jan  6 2:00
  614: 			-6:00	1:00	CDT	1974 Oct 27 2:00
  615: 			-5:00	US	E%sT
  616: #
  617: # Wayne, Clinton, and Russell Counties, Kentucky
  618: #
  619: # From
  620: # <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml">
  621: # Lake Cumberland LIFE
  622: # </a> (1999-01-29) via WKYM-101.7:
  623: # Clinton County has joined Wayne County in asking the DoT to change from
  624: # the Central to the Eastern time zone....  The Wayne County government made
  625: # the same request in December.  And while Russell County officials have not
  626: # taken action, the majority of respondents to a poll conducted there in
  627: # August indicated they would like to change to "fast time" also.
  628: # The three Lake Cumberland counties are the farthest east of any U.S.
  629: # location in the Central time zone.
  630: #
  631: # From Rich Wales (2000-08-29):
  632: # After prolonged debate, and despite continuing deep differences of opinion,
  633: # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
  634: # (-0500) time.  They won't "fall back" this year.  See Sara Shipley,
  635: # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
  636: #
  637: # From Paul Eggert (2001-07-16):
  638: # The final rule was published in the
  639: # <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22">
  640: # Federal Register 65, 160 (2000-08-17), page 50154-50158.
  641: # </a>
  642: #
  643: Zone America/Kentucky/Monticello -5:39:24 - LMT	1883 Nov 18 12:20:36
  644: 			-6:00	US	C%sT	1946
  645: 			-6:00	-	CST	1968
  646: 			-6:00	US	C%sT	2000 Oct 29  2:00
  647: 			-5:00	US	E%sT
  648: 
  649: 
  650: # From Rives McDow (2000-08-30):
  651: # Here ... are all the changes in the US since 1985.
  652: # Kearny County, KS (put all of county on central;
  653: #	previously split between MST and CST) ... 1990-10
  654: # Starke County, IN (from CST to EST) ... 1991-10
  655: # Oliver County, ND (from MST to CST) ... 1992-10
  656: # West Wendover, NV (from PST TO MST) ... 1999-10
  657: # Wayne County, KY (from CST to EST) ... 2000-10
  658: #
  659: # From Paul Eggert (2001-07-17):
  660: # We don't know where the line used to be within Kearny County, KS,
  661: # so omit that change for now.
  662: # See America/Indiana/Knox for the Starke County, IN change.
  663: # See America/North_Dakota/Center for the Oliver County, ND change.
  664: # West Wendover, NV officially switched from Pacific to mountain time on
  665: # 1999-10-31.  See the
  666: # <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15">
  667: # Federal Register 64, 203 (1999-10-21), page 56705-56707.
  668: # </a>
  669: # However, the Federal Register says that West Wendover already operated
  670: # on mountain time, and the rule merely made this official;
  671: # hence a separate tz entry is not needed.
  672: 
  673: # Michigan
  674: #
  675: # From Bob Devine (1988-01-28):
  676: # Michigan didn't observe DST from 1968 to 1973.
  677: #
  678: # From Paul Eggert (1999-03-31):
  679: # Shanks writes that Michigan started using standard time on 1885-09-18,
  680: # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01)
  681: # that Detroit kept
  682: #
  683: #	local time until 1900 when the City Council decreed that clocks should
  684: #	be put back twenty-eight minutes to Central Standard Time.  Half the
  685: #	city obeyed, half refused.  After considerable debate, the decision
  686: #	was rescinded and the city reverted to Sun time.  A derisive offer to
  687: #	erect a sundial in front of the city hall was referred to the
  688: #	Committee on Sewers.  Then, in 1905, Central time was adopted
  689: #	by city vote.
  690: #
  691: # This story is too entertaining to be false, so go with Howse over Shanks.
  692: #
  693: # From Paul Eggert (2001-03-06):
  694: # Garland (1927) writes ``Cleveland and Detroit advanced their clocks
  695: # one hour in 1914.''  This change is not in Shanks.  We have no more
  696: # info, so omit this for now.
  697: #
  698: # Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
  699: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
  700: Rule	Detroit	1948	only	-	Apr	lastSun	2:00	1:00	D
  701: Rule	Detroit	1948	only	-	Sep	lastSun	2:00	0	S
  702: Rule	Detroit	1967	only	-	Jun	14	2:00	1:00	D
  703: Rule	Detroit	1967	only	-	Oct	lastSun	2:00	0	S
  704: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  705: Zone America/Detroit	-5:32:11 -	LMT	1905
  706: 			-6:00	-	CST	1915 May 15 2:00
  707: 			-5:00	-	EST	1942
  708: 			-5:00	US	E%sT	1946
  709: 			-5:00	Detroit	E%sT	1973
  710: 			-5:00	US	E%sT	1975
  711: 			-5:00	-	EST	1975 Apr 27 2:00
  712: 			-5:00	US	E%sT
  713: #
  714: # The Michigan border with Wisconsin switched from EST to CST/CDT in 1973.
  715: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
  716: Rule Menominee	1946	only	-	Apr	lastSun	2:00	1:00	D
  717: Rule Menominee	1946	only	-	Sep	lastSun	2:00	0	S
  718: Rule Menominee	1966	only	-	Apr	lastSun	2:00	1:00	D
  719: Rule Menominee	1966	only	-	Oct	lastSun	2:00	0	S
  720: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  721: Zone America/Menominee	-5:50:27 -	LMT	1885 Sep 18 12:00
  722: 			-6:00	US	C%sT	1946
  723: 			-6:00 Menominee	C%sT	1969 Apr 27 2:00
  724: 			-5:00	-	EST	1973 Apr 29 2:00
  725: 			-6:00	US	C%sT
  726: 
  727: # Navassa
  728: # administered by the US Fish and Wildlife Service
  729: # claimed by US under the provisions of the 1856 Guano Islands Act
  730: # also claimed by Haiti
  731: # occupied 1857/1900 by the Navassa Phosphate Co
  732: # US lighthouse 1917/1996-09
  733: # currently uninhabited
  734: # see Mark Fineman, ``An Isle Rich in Guano and Discord'',
  735: # _Los Angeles Times_ (1998-11-10), A1, A10; it cites
  736: # Jimmy Skaggs, _The Great Guano Rush_ (1994).
  737: 
  738: ################################################################################
  739: 
  740: 
  741: # From Paul Eggert (1999-10-29):
  742: # A good source for time zone historical data outside the US is
  743: # Thomas G. Shanks, The International Atlas (5th edition),
  744: # San Diego: ACS Publications, Inc. (1999).
  745: #
  746: # Gwillim Law writes that a good source
  747: # for recent time zone data is the International Air Transport
  748: # Association's Standard Schedules Information Manual (IATA SSIM),
  749: # published semiannually.  Law sent in several helpful summaries
  750: # of the IATA's data after 1990.
  751: #
  752: # Except where otherwise noted, Shanks is the source for entries through 1990,
  753: # and IATA SSIM is the source for entries after 1990.
  754: #
  755: # Other sources occasionally used include:
  756: #
  757: #	Edward W. Whitman, World Time Differences,
  758: #	Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
  759: #	which I found in the UCLA library.
  760: #
  761: #	<a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf">
  762: #	William Willett, The Waste of Daylight, 19th edition
  763: #	</a> (1914-03)
  764: #
  765: # See the `europe' file for Greenland.
  766: 
  767: # Canada
  768: 
  769: # From Alain LaBont<e'> (1994-11-14):
  770: # I post here the time zone abbreviations standardized in Canada
  771: # for both English and French in the CAN/CSA-Z234.4-89 standard....
  772: #
  773: #	UTC	Standard time	Daylight savings time
  774: #	offset	French	English	French	English
  775: #	-2:30	-	-	HAT	NDT
  776: #	-3	-	-	HAA	ADT
  777: #	-3:30	HNT	NST	-	-
  778: #	-4	HNA	AST	HAE	EDT
  779: #	-5	HNE	EST	HAC	CDT
  780: #	-6	HNC	CST	HAR	MDT
  781: #	-7	HNR	MST	HAP	PDT
  782: #	-8	HNP	PST	HAY	YDT
  783: #	-9	HNY	YST	-	-
  784: #
  785: #	HN: Heure Normale	ST: Standard Time
  786: #	HA: Heure Avanc<e'>e	DT: Daylight saving Time
  787: #
  788: #	A: de l'Atlantique	Atlantic
  789: #	C: du Centre		Central
  790: #	E: de l'Est		Eastern
  791: #	M:			Mountain
  792: #	N:			Newfoundland
  793: #	P: du Pacifique		Pacific
  794: #	R: des Rocheuses
  795: #	T: de Terre-Neuve
  796: #	Y: du Yukon		Yukon
  797: #
  798: # From Paul Eggert (1994-11-22):
  799: # Alas, this sort of thing must be handled by localization software.
  800: 
  801: # Unless otherwise specified, the data for Canada are all from Shanks.
  802: 
  803: # From Paul Eggert (2000-10-02):
  804: # H. David Matthews and Mary Vincent's map
  805: # <a href="http://www.canadiangeographic.ca/SO98/geomap.htm">
  806: # "It's about TIME", _Canadian Geographic_ (September-October 1998)
  807: # </a> contains detailed boundaries for regions observing nonstandard
  808: # time and daylight saving time arrangements in Canada circa 1998.
  809: #
  810: # INMS, the Institute for National Measurement Standards in Ottawa, has
  811: # <a href="http://www.nrc.ca/inms/time/tze.html">
  812: # information about standard and daylight saving time zones in Canada.
  813: # </a> (updated periodically).
  814: # Its unofficial information is often taken from Matthews and Vincent.
  815: 
  816: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
  817: Rule	Canada	1918	only	-	Apr	14	2:00	1:00	D
  818: Rule	Canada	1918	only	-	Oct	31	2:00	0	S
  819: Rule	Canada	1942	only	-	Feb	 9	2:00	1:00	W # War
  820: Rule	Canada	1945	only	-	Aug	14	23:00u	1:00	P # Peace
  821: Rule	Canada	1945	only	-	Sep	30	2:00	0	S
  822: Rule	Canada	1974	1986	-	Apr	lastSun	2:00	1:00	D
  823: Rule	Canada	1974	max	-	Oct	lastSun	2:00	0	S
  824: Rule	Canada	1987	max	-	Apr	Sun>=1	2:00	1:00	D
  825: 
  826: 
  827: # Newfoundland (and far southeast Labrador)
  828: 
  829: # From Paul Eggert (2000-10-02):
  830: # Matthews and Vincent (1998) write that Labrador should use NST/NDT,
  831: # but the only part of Labrador that follows the rules is the
  832: # southeast corner, including Port Hope Simpson and Mary's Harbour,
  833: # but excluding, say, Black Tickle.
  834: 
  835: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
  836: Rule	StJohns	1917	only	-	Apr	 8	2:00	1:00	D
  837: Rule	StJohns	1917	only	-	Sep	17	2:00	0	S
  838: # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks.
  839: Rule	StJohns	1919	only	-	May	 5	23:00	1:00	D
  840: Rule	StJohns	1919	only	-	Aug	12	23:00	0	S
  841: # For 1931-1935 Whitman gives Apr same date; go with Shanks.
  842: Rule	StJohns	1920	1935	-	May	Sun>=1	23:00	1:00	D
  843: Rule	StJohns	1920	1935	-	Oct	lastSun	23:00	0	S
  844: # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks.
  845: Rule	StJohns	1936	1941	-	May	Mon>=9	0:00	1:00	D
  846: Rule	StJohns	1936	1941	-	Oct	Mon>=2	0:00	0	S
  847: # Whitman gives the following transitions:
  848: # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07
  849: # but go with Shanks and assume they used Canadian rules.
  850: # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
  851: # Apr 30 - Sep 24; go with Shanks.
  852: Rule	StJohns	1946	1950	-	May	Sun>=8	2:00	1:00	D
  853: Rule	StJohns	1946	1950	-	Oct	Sun>=2	2:00	0	S
  854: Rule	StJohns	1951	1986	-	Apr	lastSun	2:00	1:00	D
  855: Rule	StJohns	1951	1959	-	Sep	lastSun	2:00	0	S
  856: Rule	StJohns	1960	1986	-	Oct	lastSun	2:00	0	S
  857: # From Paul Eggert (2000-10-02):
  858: # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
  859: # at 00:01 local time.  For now, assume it started in 1987.
  860: Rule	StJohns	1987	only	-	Apr	Sun>=1	0:01	1:00	D
  861: Rule	StJohns	1987	max	-	Oct	lastSun	0:01	0	S
  862: Rule	StJohns	1988	only	-	Apr	Sun>=1	0:01	2:00	DD
  863: Rule	StJohns	1989	max	-	Apr	Sun>=1	0:01	1:00	D
  864: # St John's has an apostrophe, but Posix file names can't have apostrophes.
  865: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  866: Zone America/St_Johns	-3:30:52 -	LMT	1884
  867: 			-3:30:52 StJohns N%sT	1918
  868: 			-3:30:52 Canada	N%sT	1919
  869: 			-3:30:52 StJohns N%sT	1935 Mar 30
  870: 			-3:30	StJohns	N%sT	1942 May 11
  871: 			-3:30	Canada	N%sT	1946
  872: 			-3:30	StJohns	N%sT
  873: 
  874: # most of east Labrador
  875: 
  876: # The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'.
  877: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  878: Zone America/Goose_Bay	-4:01:40 -	LMT	1884 # Happy Valley-Goose Bay
  879: 			-3:30:52 -	NST	1918
  880: 			-3:30:52 Canada N%sT	1919
  881: 			-3:30:52 -	NST	1935 Mar 30
  882: 			-3:30	-	NST	1936
  883: 			-3:30	StJohns	N%sT	1942 May 11
  884: 			-3:30	Canada	N%sT	1946
  885: 			-3:30	StJohns	N%sT	1966 Mar 15 2:00
  886: 			-4:00	StJohns	A%sT
  887: 
  888: 
  889: # west Labrador, New Brunswick, Nova Scotia, Prince Edward I
  890: 
  891: # From Paul Eggert (1996-06-12):
  892: # Shanks writes that since 1970 most of this region has been like Halifax.
  893: # Many locales did not observe peacetime DST until 1972;
  894: # Glace Bay, NS is the largest that we know of.
  895: # Shanks also writes that Liverpool, NS was the only town in Canada to observe
  896: # DST in 1971 but not 1970; for now we'll assume this is a typo.
  897: 
  898: # From Paul Eggert (2000-10-02):
  899: # INMS (2000-09-12) says that, since 1988 at least, New Brunswick switches
  900: # at 00:01 local time.  FIXME: verify and create a new Zone for this.
  901: 
  902: 
  903: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
  904: Rule Halifax	1916	only	-	Apr	 1	0:00	1:00	D
  905: Rule Halifax	1916	only	-	Oct	 1	0:00	0	S
  906: Rule Halifax	1920	only	-	May	 9	0:00	1:00	D
  907: Rule Halifax	1920	only	-	Aug	29	0:00	0	S
  908: Rule Halifax	1921	only	-	May	 6	0:00	1:00	D
  909: Rule Halifax	1921	1922	-	Sep	 5	0:00	0	S
  910: Rule Halifax	1922	only	-	Apr	30	0:00	1:00	D
  911: Rule Halifax	1923	1925	-	May	Sun>=1	0:00	1:00	D
  912: Rule Halifax	1923	only	-	Sep	 4	0:00	0	S
  913: Rule Halifax	1924	only	-	Sep	15	0:00	0	S
  914: Rule Halifax	1925	only	-	Sep	28	0:00	0	S
  915: Rule Halifax	1926	only	-	May	16	0:00	1:00	D
  916: Rule Halifax	1926	only	-	Sep	13	0:00	0	S
  917: Rule Halifax	1927	only	-	May	 1	0:00	1:00	D
  918: Rule Halifax	1927	only	-	Sep	26	0:00	0	S
  919: Rule Halifax	1928	1931	-	May	Sun>=8	0:00	1:00	D
  920: Rule Halifax	1928	only	-	Sep	 9	0:00	0	S
  921: Rule Halifax	1929	only	-	Sep	 3	0:00	0	S
  922: Rule Halifax	1930	only	-	Sep	15	0:00	0	S
  923: Rule Halifax	1931	1932	-	Sep	Mon>=24	0:00	0	S
  924: Rule Halifax	1932	only	-	May	 1	0:00	1:00	D
  925: Rule Halifax	1933	only	-	Apr	30	0:00	1:00	D
  926: Rule Halifax	1933	only	-	Oct	 2	0:00	0	S
  927: Rule Halifax	1934	only	-	May	20	0:00	1:00	D
  928: Rule Halifax	1934	only	-	Sep	16	0:00	0	S
  929: Rule Halifax	1935	only	-	Jun	 2	0:00	1:00	D
  930: Rule Halifax	1935	only	-	Sep	30	0:00	0	S
  931: Rule Halifax	1936	only	-	Jun	 1	0:00	1:00	D
  932: Rule Halifax	1936	only	-	Sep	14	0:00	0	S
  933: Rule Halifax	1937	1938	-	May	Sun>=1	0:00	1:00	D
  934: Rule Halifax	1937	1941	-	Sep	Mon>=24	0:00	0	S
  935: Rule Halifax	1939	only	-	May	28	0:00	1:00	D
  936: Rule Halifax	1940	1941	-	May	Sun>=1	0:00	1:00	D
  937: Rule Halifax	1946	1949	-	Sep	lastSun	2:00	0	S
  938: Rule Halifax	1946	1949	-	Apr	lastSun	2:00	1:00	D
  939: Rule Halifax	1951	1954	-	Sep	lastSun	2:00	0	S
  940: Rule Halifax	1951	1954	-	Apr	lastSun	2:00	1:00	D
  941: Rule Halifax	1956	1959	-	Sep	lastSun	2:00	0	S
  942: Rule Halifax	1956	1959	-	Apr	lastSun	2:00	1:00	D
  943: Rule Halifax	1962	1973	-	Apr	lastSun	2:00	1:00	D
  944: Rule Halifax	1962	1973	-	Oct	lastSun	2:00	0	S
  945: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
  946: Zone America/Halifax	-4:14:24 -	LMT	1902 Jun 15
  947: 			-4:00	Halifax	A%sT	1918
  948: 			-4:00	Canada	A%sT	1919
  949: 			-4:00	Halifax	A%sT	1942 Feb  9 2:00s
  950: 			-4:00	Canada	A%sT	1946
  951: 			-4:00	Halifax	A%sT	1974
  952: 			-4:00	Canada	A%sT
  953: Zone America/Glace_Bay	-3:59:48 -	LMT	1902 Jun 15
  954: 			-4:00	Canada	A%sT	1953
  955: 			-4:00	Halifax	A%sT	1954
  956: 			-4:00	-	AST	1972
  957: 			-4:00	Halifax	A%sT	1974
  958: 			-4:00	Canada	A%sT
  959: 
  960: 
  961: # Ontario, Quebec
  962: 
  963: # From Paul Eggert (1996-06-12):
  964: # Shanks writes that since 1970 most of Ontario has been like Toronto,
  965: # and most of Quebec has been like Montreal.
  966: # Thunder Bay skipped DST in 1973.
  967: # Many smaller locales did not observe peacetime DST until 1974;
  968: # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
  969: # Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
  970: 
  971: # From Mark Brader (2003-07-26):
  972: # [According to the Toronto Star] Orillia, Ontario, adopted DST
  973: # effective Saturday, 1912-06-22, 22:00; the article mentions that
  974: # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
  975: # have already done so.  In Orillia DST was to run until Saturday,
  976: # 1912-08-31 (no time mentioned), but it was met with considerable
  977: # hostility from certain segments of the public, and was revoked after
  978: # only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but
  979: # presumably that should be -07-06.  (1912-06-19, -07-12; also letters
  980: # earlier in June).
  981: #
  982: # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).
  983: 
  984: # From Paul Eggert (1997-10-17):
  985: # Mark Brader writes that an article in the 1997-10-14 Toronto Star
  986: # says that Atikokan, Ontario currently does not observe DST,
  987: # but will vote on 11-10 whether to use EST/EDT.
  988: # He also writes that the
  989: # <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html">
  990: # Ontario Time Act (1990, Chapter T.9)
  991: # </a>
  992: # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.
  993: # Officially Atikokan is therefore on CST/CDT, and most likely this report
  994: # concerns a non-official time observed as a matter of local practice.
  995: # For what it's worth, Shanks says that Atikokan has agreed with
  996: # Rainy River ever since standard time was introduced.
  997: 
  998: # From Paul Eggert (2000-10-02):
  999: # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and
 1000: # New Osnaburgh observe CST all year, that Big Trout Lake observes
 1001: # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in
 1002: # violation of the official Ontario rules.
 1003: # They also write that Quebec east of the -63 meridian is supposed to
 1004: # observe AST, but residents as far east as Natashquan use EST/EDT,
 1005: # and residents east of Natashquan use AST.
 1006: # We probably need Zones for far east Quebec and for Atikokan,
 1007: # but we don't know when their practices started.
 1008: 
 1009: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1010: Rule	Mont	1917	only	-	Mar	25	2:00	1:00	D
 1011: Rule	Mont	1917	only	-	Apr	24	0:00	0	S
 1012: Rule	Mont	1919	only	-	Mar	31	2:30	1:00	D
 1013: Rule	Mont	1919	only	-	Oct	25	2:30	0	S
 1014: Rule	Mont	1920	only	-	May	 2	2:30	1:00	D
 1015: Rule	Mont	1920	1922	-	Oct	Sun>=1	2:30	0	S
 1016: Rule	Mont	1921	only	-	May	 1	2:00	1:00	D
 1017: Rule	Mont	1922	only	-	Apr	30	2:00	1:00	D
 1018: Rule	Mont	1924	only	-	May	17	2:00	1:00	D
 1019: Rule	Mont	1924	1926	-	Sep	lastSun	2:30	0	S
 1020: Rule	Mont	1925	1926	-	May	Sun>=1	2:00	1:00	D
 1021: # The 1927-to-1937 rules can be expressed more simply as
 1022: # Rule	Mont	1927	1937	-	Apr	lastSat	24:00	1:00	D
 1023: # Rule	Mont	1927	1937	-	Sep	lastSat	24:00	0	S
 1024: # The rules below avoid use of 24:00
 1025: # (which pre-1998 versions of zic cannot handle).
 1026: Rule	Mont	1927	only	-	May	1	0:00	1:00	D
 1027: Rule	Mont	1927	1932	-	Sep	lastSun	0:00	0	S
 1028: Rule	Mont	1928	1931	-	Apr	lastSun	0:00	1:00	D
 1029: Rule	Mont	1932	only	-	May	1	0:00	1:00	D
 1030: Rule	Mont	1933	1940	-	Apr	lastSun	0:00	1:00	D
 1031: Rule	Mont	1933	only	-	Oct	1	0:00	0	S
 1032: Rule	Mont	1934	1939	-	Sep	lastSun	0:00	0	S
 1033: Rule	Mont	1946	1973	-	Apr	lastSun	2:00	1:00	D
 1034: Rule	Mont	1945	1948	-	Sep	lastSun	2:00	0	S
 1035: Rule	Mont	1949	1950	-	Oct	lastSun	2:00	0	S
 1036: Rule	Mont	1951	1956	-	Sep	lastSun	2:00	0	S
 1037: Rule	Mont	1957	1973	-	Oct	lastSun	2:00	0	S
 1038: 
 1039: Rule	Toronto	1919	only	-	Mar	30	23:30	1:00	D
 1040: Rule	Toronto	1919	only	-	Oct	26	0:00	0	S
 1041: Rule	Toronto	1920	only	-	May	 2	2:00	1:00	D
 1042: Rule	Toronto	1920	only	-	Sep	26	0:00	0	S
 1043: Rule	Toronto	1921	only	-	May	15	2:00	1:00	D
 1044: Rule	Toronto	1921	only	-	Sep	15	2:00	0	S
 1045: Rule	Toronto	1922	1923	-	May	Sun>=8	2:00	1:00	D
 1046: # Shanks says 1923-09-19; assume it's a typo and that "-16" was meant.
 1047: Rule	Toronto	1922	1926	-	Sep	Sun>=15	2:00	0	S
 1048: Rule	Toronto	1924	1927	-	May	Sun>=1	2:00	1:00	D
 1049: # The 1927-to-1939 rules can be expressed more simply as
 1050: # Rule	Toronto	1927	1937	-	Sep	Sun>=25	2:00	0	S
 1051: # Rule	Toronto	1928	1937	-	Apr	Sun>=25	2:00	1:00	D
 1052: # Rule	Toronto	1938	1940	-	Apr	lastSun	2:00	1:00	D
 1053: # Rule	Toronto	1938	1939	-	Sep	lastSun	2:00	0	S
 1054: # The rules below avoid use of Sun>=25
 1055: # (which pre-2004 versions of zic cannot handle).
 1056: Rule	Toronto	1927	1932	-	Sep	lastSun	2:00	0	S
 1057: Rule	Toronto	1928	1931	-	Apr	lastSun	2:00	1:00	D
 1058: Rule	Toronto	1932	only	-	May	1	2:00	1:00	D
 1059: Rule	Toronto	1933	1940	-	Apr	lastSun	2:00	1:00	D
 1060: Rule	Toronto	1933	only	-	Oct	1	2:00	0	S
 1061: Rule	Toronto	1934	1939	-	Sep	lastSun	2:00	0	S
 1062: Rule	Toronto	1945	1946	-	Sep	lastSun	2:00	0	S
 1063: Rule	Toronto	1946	only	-	Apr	lastSun	2:00	1:00	D
 1064: Rule	Toronto	1947	1949	-	Apr	lastSun	0:00	1:00	D
 1065: Rule	Toronto	1947	1948	-	Sep	lastSun	0:00	0	S
 1066: Rule	Toronto	1949	only	-	Nov	lastSun	0:00	0	S
 1067: Rule	Toronto	1950	1973	-	Apr	lastSun	2:00	1:00	D
 1068: Rule	Toronto	1950	only	-	Nov	lastSun	2:00	0	S
 1069: Rule	Toronto	1951	1956	-	Sep	lastSun	2:00	0	S
 1070: # Shanks says Toronto ended DST a week early in 1971, namely on 1971-10-24,
 1071: # but Mark Brader wrote (2003-05-31) that he checked the 1971-10-30 issue
 1072: # of the Toronto Star, and it said that DST ended 1971-10-31 as usual.
 1073: Rule	Toronto	1957	1973	-	Oct	lastSun	2:00	0	S
 1074: 
 1075: # From Paul Eggert (2003-07-27):
 1076: # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and
 1077: # Port Arthur, Ontario, the principle of the Bill has been in
 1078: # operation for the past three years, and in the City of Moose Jaw,
 1079: # Saskatchewan, for one year."
 1080: 
 1081: # From David Bryan via Tory Tronrud, Director/Curator,
 1082: # Thunder Bay Museum (2003-11-12):
 1083: # There is some suggestion, however, that, by-law or not, daylight
 1084: # savings time was being practiced in Fort William and Port Arthur
 1085: # before 1909.... [I]n 1910, the line between the Eastern and Central
 1086: # Time Zones was permanently moved about two hundred miles west to
 1087: # include the Thunder Bay area....  When Canada adopted daylight
 1088: # savings time in 1916, Fort William and Port Arthur, having done so
 1089: # already, did not change their clocks....  During the Second World
 1090: # War,... [t]he cities agreed to implement DST during the summer
 1091: # months for the remainder of the war years.
 1092: 
 1093: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1094: Zone America/Montreal	-4:54:16 -	LMT	1884
 1095: 			-5:00	Mont	E%sT	1918
 1096: 			-5:00	Canada	E%sT	1919
 1097: 			-5:00	Mont	E%sT	1942 Feb  9 2:00s
 1098: 			-5:00	Canada	E%sT	1946
 1099: 			-5:00	Mont	E%sT	1974
 1100: 			-5:00	Canada	E%sT
 1101: Zone America/Toronto	-5:17:32 -	LMT	1895
 1102: 			-5:00	Canada	E%sT	1919
 1103: 			-5:00	Toronto	E%sT	1942 Feb  9 2:00s
 1104: 			-5:00	Canada	E%sT	1946
 1105: 			-5:00	Toronto	E%sT	1974
 1106: 			-5:00	Canada	E%sT
 1107: Zone America/Thunder_Bay -5:57:00 -	LMT	1895
 1108: 			-6:00	-	CST	1910
 1109: 			-5:00	-	EST	1942
 1110: 			-5:00	Canada	E%sT	1970
 1111: 			-5:00	Mont	E%sT	1973
 1112: 			-5:00	-	EST	1974
 1113: 			-5:00	Canada	E%sT
 1114: Zone America/Nipigon	-5:53:04 -	LMT	1895
 1115: 			-5:00	Canada	E%sT	1940 Sep 29
 1116: 			-5:00	1:00	EDT	1942 Feb  9 2:00s
 1117: 			-5:00	Canada	E%sT
 1118: Zone America/Rainy_River -6:17:56 -	LMT	1895
 1119: 			-6:00	Canada	C%sT	1940 Sep 29
 1120: 			-6:00	1:00	CDT	1942 Feb  9 2:00s
 1121: 			-6:00	Canada	C%sT
 1122: 
 1123: 
 1124: # Manitoba
 1125: 
 1126: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1127: Rule	Winn	1916	only	-	Apr	23	0:00	1:00	D
 1128: Rule	Winn	1916	only	-	Sep	17	0:00	0	S
 1129: Rule	Winn	1918	only	-	Apr	14	2:00	1:00	D
 1130: Rule	Winn	1918	only	-	Oct	31	2:00	0	S
 1131: Rule	Winn	1937	only	-	May	16	2:00	1:00	D
 1132: Rule	Winn	1937	only	-	Sep	26	2:00	0	S
 1133: Rule	Winn	1942	only	-	Feb	 9	2:00	1:00	W # War
 1134: Rule	Winn	1945	only	-	Aug	14	23:00u	1:00	P # Peace
 1135: Rule	Winn	1945	only	-	Sep	lastSun	2:00	0	S
 1136: Rule	Winn	1946	only	-	May	12	2:00	1:00	D
 1137: Rule	Winn	1946	only	-	Oct	13	2:00	0	S
 1138: Rule	Winn	1947	1949	-	Apr	lastSun	2:00	1:00	D
 1139: Rule	Winn	1947	1949	-	Sep	lastSun	2:00	0	S
 1140: Rule	Winn	1950	only	-	May	 1	2:00	1:00	D
 1141: Rule	Winn	1950	only	-	Sep	30	2:00	0	S
 1142: Rule	Winn	1951	1960	-	Apr	lastSun	2:00	1:00	D
 1143: Rule	Winn	1951	1958	-	Sep	lastSun	2:00	0	S
 1144: Rule	Winn	1959	only	-	Oct	lastSun	2:00	0	S
 1145: Rule	Winn	1960	only	-	Sep	lastSun	2:00	0	S
 1146: Rule	Winn	1963	only	-	Apr	lastSun	2:00	1:00	D
 1147: Rule	Winn	1963	only	-	Sep	22	2:00	0	S
 1148: Rule	Winn	1966	1986	-	Apr	lastSun	2:00	1:00	D
 1149: Rule	Winn	1966	1986	-	Oct	lastSun	2:00	0	S
 1150: Rule	Winn	1987	max	-	Apr	Sun>=1	2:00	1:00	D
 1151: # From Paul Eggert (2000-10-02):
 1152: # INMS (2000-09-12) says that, since 1988 at least, Manitoba switches from
 1153: # DST at 03:00 local time.  For now, assume it started in 1987.
 1154: Rule	Winn	1987	max	-	Oct	lastSun	2:00s	0	S
 1155: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1156: Zone America/Winnipeg	-6:28:36 -	LMT	1887 Jul 16
 1157: 			-6:00	Winn	C%sT
 1158: 
 1159: 
 1160: # Saskatchewan
 1161: 
 1162: # From Mark Brader (2003-07-26):
 1163: # The first actual adoption of DST in Canada was at the municipal
 1164: # level.  As the [Toronto] Star put it (1912-06-07), "While people
 1165: # elsewhere have long been talking of legislation to save daylight,
 1166: # the city of Moose Jaw [Saskatchewan] has acted on its own hook."
 1167: # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
 1168: # presumably late evening, as below), and would run until "the end of
 1169: # the summer".  The discrepancy between municipal time and railroad
 1170: # time was noted.
 1171: 
 1172: # From Paul Eggert (2003-07-27):
 1173: # Willett (1914-03) notes that DST "has been in operation ... in the
 1174: # City of Moose Jaw, Saskatchewan, for one year."
 1175: 
 1176: # From Paul Eggert (2000-10-02):
 1177: # Shanks writes that since 1970 most of this region has been like Regina.
 1178: # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
 1179: # Other western towns (e.g. Lloydminster) are like Edmonton.
 1180: # Matthews and Vincent (1998) write that Denare Beach and Creighton
 1181: # are like Winnipeg, in violation of Saskatchewan law.
 1182: 
 1183: # From W. Jones (1992-11-06):
 1184: # The. . .below is based on information I got from our law library, the
 1185: # provincial archives, and the provincial Community Services department.
 1186: # A precise history would require digging through newspaper archives, and
 1187: # since you didn't say what you wanted, I didn't bother.
 1188: #
 1189: # Saskatchewan is split by a time zone meridian (105W) and over the years
 1190: # the boundary became pretty ragged as communities near it reevaluated
 1191: # their affiliations in one direction or the other.  In 1965 a provincial
 1192: # referendum favoured legislating common time practices.
 1193: #
 1194: # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
 1195: # Saskatchewan 1978) was proclaimed, and established that the eastern
 1196: # part of Saskatchewan would use CST year round, that districts in
 1197: # northwest Saskatchewan would by default follow CST but could opt to
 1198: # follow Mountain Time rules (thus 1 hour difference in the winter and
 1199: # zero in the summer), and that districts in southwest Saskatchewan would
 1200: # by default follow MT but could opt to follow CST.
 1201: #
 1202: # It took a few years for the dust to settle (I know one story of a town
 1203: # on one time zone having its school in another, such that a mom had to
 1204: # serve her family lunch in two shifts), but presently it seems that only
 1205: # a few towns on the border with Alberta (e.g. Lloydminster) follow MT
 1206: # rules any more; all other districts appear to have used CST year round
 1207: # since sometime in the 1960s.
 1208: 
 1209: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1210: Rule	Regina	1918	only	-	Apr	14	2:00	1:00	D
 1211: Rule	Regina	1918	only	-	Oct	31	2:00	0	S
 1212: Rule	Regina	1930	1934	-	May	Sun>=1	0:00	1:00	D
 1213: Rule	Regina	1930	1934	-	Oct	Sun>=1	0:00	0	S
 1214: Rule	Regina	1937	1941	-	Apr	Sun>=8	0:00	1:00	D
 1215: Rule	Regina	1937	only	-	Oct	Sun>=8	0:00	0	S
 1216: Rule	Regina	1938	only	-	Oct	Sun>=1	0:00	0	S
 1217: Rule	Regina	1939	1941	-	Oct	Sun>=8	0:00	0	S
 1218: Rule	Regina	1942	only	-	Feb	 9	2:00	1:00	W # War
 1219: Rule	Regina	1945	only	-	Aug	14	23:00u	1:00	P # Peace
 1220: Rule	Regina	1945	only	-	Sep	lastSun	2:00	0	S
 1221: Rule	Regina	1946	only	-	Apr	Sun>=8	2:00	1:00	D
 1222: Rule	Regina	1946	only	-	Oct	Sun>=8	2:00	0	S
 1223: Rule	Regina	1947	1957	-	Apr	lastSun	2:00	1:00	D
 1224: Rule	Regina	1947	1957	-	Sep	lastSun	2:00	0	S
 1225: Rule	Regina	1959	only	-	Apr	lastSun	2:00	1:00	D
 1226: Rule	Regina	1959	only	-	Oct	lastSun	2:00	0	S
 1227: #
 1228: Rule	Swift	1957	only	-	Apr	lastSun	2:00	1:00	D
 1229: Rule	Swift	1957	only	-	Oct	lastSun	2:00	0	S
 1230: Rule	Swift	1959	1961	-	Apr	lastSun	2:00	1:00	D
 1231: Rule	Swift	1959	only	-	Oct	lastSun	2:00	0	S
 1232: Rule	Swift	1960	1961	-	Sep	lastSun	2:00	0	S
 1233: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1234: Zone America/Regina	-6:58:36 -	LMT	1905 Sep
 1235: 			-7:00	Regina	M%sT	1960 Apr lastSun 2:00
 1236: 			-6:00	-	CST
 1237: Zone America/Swift_Current -7:11:20 -	LMT	1905 Sep
 1238: 			-7:00	Canada	M%sT	1946 Apr lastSun 2:00
 1239: 			-7:00	Regina	M%sT	1950
 1240: 			-7:00	Swift	M%sT	1972 Apr lastSun 2:00
 1241: 			-6:00	-	CST
 1242: 
 1243: 
 1244: # Alberta
 1245: 
 1246: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1247: Rule	Edm	1918	1919	-	Apr	Sun>=8	2:00	1:00	D
 1248: Rule	Edm	1918	only	-	Oct	31	2:00	0	S
 1249: Rule	Edm	1919	only	-	May	27	2:00	0	S
 1250: Rule	Edm	1920	1923	-	Apr	lastSun	2:00	1:00	D
 1251: Rule	Edm	1920	only	-	Oct	lastSun	2:00	0	S
 1252: Rule	Edm	1921	1923	-	Sep	lastSun	2:00	0	S
 1253: Rule	Edm	1942	only	-	Feb	 9	2:00	1:00	W # War
 1254: Rule	Edm	1945	only	-	Aug	14	23:00u	1:00	P # Peace
 1255: Rule	Edm	1945	only	-	Sep	lastSun	2:00	0	S
 1256: Rule	Edm	1947	only	-	Apr	lastSun	2:00	1:00	D
 1257: Rule	Edm	1947	only	-	Sep	lastSun	2:00	0	S
 1258: Rule	Edm	1967	only	-	Apr	lastSun	2:00	1:00	D
 1259: Rule	Edm	1967	only	-	Oct	lastSun	2:00	0	S
 1260: Rule	Edm	1969	only	-	Apr	lastSun	2:00	1:00	D
 1261: Rule	Edm	1969	only	-	Oct	lastSun	2:00	0	S
 1262: Rule	Edm	1972	1986	-	Apr	lastSun	2:00	1:00	D
 1263: Rule	Edm	1972	max	-	Oct	lastSun	2:00	0	S
 1264: Rule	Edm	1987	max	-	Apr	Sun>=1	2:00	1:00	D
 1265: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1266: Zone America/Edmonton	-7:33:52 -	LMT	1906 Sep
 1267: 			-7:00	Edm	M%sT
 1268: 
 1269: 
 1270: # British Columbia
 1271: 
 1272: # From Paul Eggert (2000-10-02):
 1273: # Shanks writes that since 1970 most of this region has been like Vancouver.
 1274: # Dawson Creek uses MST.  Much of east BC is like Edmonton.
 1275: # Matthews and Vincent (1998) write that Creston is like Dawson Creek.
 1276: 
 1277: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1278: Rule	Vanc	1918	only	-	Apr	14	2:00	1:00	D
 1279: Rule	Vanc	1918	only	-	Oct	31	2:00	0	S
 1280: Rule	Vanc	1942	only	-	Feb	 9	2:00	1:00	W # War
 1281: Rule	Vanc	1945	only	-	Aug	14	23:00u	1:00	P # Peace
 1282: Rule	Vanc	1945	only	-	Sep	30	2:00	0	S
 1283: Rule	Vanc	1946	1986	-	Apr	lastSun	2:00	1:00	D
 1284: Rule	Vanc	1946	only	-	Oct	13	2:00	0	S
 1285: Rule	Vanc	1947	1961	-	Sep	lastSun	2:00	0	S
 1286: Rule	Vanc	1962	max	-	Oct	lastSun	2:00	0	S
 1287: Rule	Vanc	1987	max	-	Apr	Sun>=1	2:00	1:00	D
 1288: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1289: Zone America/Vancouver	-8:12:28 -	LMT	1884
 1290: 			-8:00	Vanc	P%sT
 1291: Zone America/Dawson_Creek -8:00:56 -	LMT	1884
 1292: 			-8:00	Canada	P%sT	1947
 1293: 			-8:00	Vanc	P%sT	1972 Aug 30 2:00
 1294: 			-7:00	-	MST
 1295: 
 1296: 
 1297: # Northwest Territories, Nunavut, Yukon
 1298: 
 1299: # From Paul Eggert (1999-10-29):
 1300: # Dawson switched to PST in 1973.  Inuvik switched to MST in 1979.
 1301: # Mathew Englander (1996-10-07) gives the following refs:
 1302: #	* 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
 1303: #	c. 7 defines Yukon standard time as UTC-9.  This is still valid;
 1304: #	see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
 1305: #	* C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
 1306: #	* O.I.C. 1980/02 established DST.
 1307: #	* O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
 1308: # Shanks says Yukon's 1973-10-28 switch was at 2:00; go with Englander.
 1309: 
 1310: # From Rives McDow (1999-09-04):
 1311: # Nunavut ... moved ... to incorporate the whole territory into one time zone.
 1312: # <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html">
 1313: # Nunavut moves to single time zone Oct. 31
 1314: # </a>
 1315: #
 1316: # From Antoine Leca (1999-09-06):
 1317: # We then need to create a new timezone for the Kitikmeot region of Nunavut
 1318: # to differentiate it from the Yellowknife region.
 1319: 
 1320: # From Paul Eggert (1999-09-20):
 1321: # <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html">
 1322: # Basic Facts: The New Territory
 1323: # </a> (1999) reports that Pangnirtung operates on eastern time,
 1324: # and that Coral Harbour does not observe DST.  We don't know when
 1325: # Pangnirtung switched to eastern time; we'll guess 1995.
 1326: 
 1327: # From Rives McDow (1999-11-08):
 1328: # On October 31, when the rest of Nunavut went to Central time,
 1329: # Pangnirtung wobbled.  Here is the result of their wobble:
 1330: #
 1331: # The following businesses and organizations in Pangnirtung use Central Time:
 1332: #
 1333: #	First Air, Power Corp, Nunavut Construction, Health Center, RCMP,
 1334: #	Eastern Arctic National Parks, A & D Specialist
 1335: #
 1336: # The following businesses and organizations in Pangnirtung use Eastern Time:
 1337: #
 1338: #	Hamlet office, All other businesses, Both schools, Airport operator
 1339: #
 1340: # This has made for an interesting situation there, which warranted the news.
 1341: # No one there that I spoke with seems concerned, or has plans to
 1342: # change the local methods of keeping time, as it evidently does not
 1343: # really interfere with any activities or make things difficult locally.
 1344: # They plan to celebrate New Year's turn-over twice, one hour apart,
 1345: # so it appears that the situation will last at least that long.
 1346: # The Nunavut Intergovernmental Affairs hopes that they will "come to
 1347: # their senses", but the locals evidently don't see any problem with
 1348: # the current state of affairs.
 1349: 
 1350: # From Michaela Rodrigue, writing in the
 1351: # <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html">
 1352: # Nunatsiaq News (1999-11-19)</a>:
 1353: # Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones,
 1354: # central - or Nunavut time - for government offices, and eastern time
 1355: # for municipal offices and schools....  Igloolik [was similar but then]
 1356: # made the switch to central time on Saturday, Nov. 6.
 1357: 
 1358: # From Paul Eggert (2000-10-02):
 1359: # Matthews and Vincent (1998) say the following, but we lack histories
 1360: # for these potential new Zones.
 1361: #
 1362: # The Canadian Forces station at Alert uses Eastern Time while the
 1363: # handful of residents at the Eureka weather station [in the Central
 1364: # zone] skip daylight savings.  Baffin Island, which is crossed by the
 1365: # Central, Eastern and Atlantic Time zones only uses Eastern Time.
 1366: # Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of
 1367: # Central Time and Southampton Island [in the Central zone] is not
 1368: # required to use daylight savings.
 1369: 
 1370: # From
 1371: # <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html">
 1372: # Nunavut now has two time zones
 1373: # </a> (2000-11-10):
 1374: # The Nunavut government would allow its employees in Kugluktuk and
 1375: # Cambridge Bay to operate on central time year-round, putting them
 1376: # one hour behind the rest of Nunavut for six months during the winter.
 1377: # At the end of October the two communities had rebelled against
 1378: # Nunavut's unified time zone, refusing to shift to eastern time with
 1379: # the rest of the territory for the winter.  Cambridge Bay remained on
 1380: # central time, while Kugluktuk, even farther west, reverted to
 1381: # mountain time, which they had used before the advent of Nunavut's
 1382: # unified time zone in 1999.
 1383: #
 1384: # From Rives McDow (2001-01-20), quoting the Nunavut government:
 1385: # The preceding decision came into effect at midnight, Saturday Nov 4, 2000.
 1386: 
 1387: # From Paul Eggert (2000-12-04):
 1388: # Let's just keep track of the official times for now.
 1389: 
 1390: # From Rives McDow (2001-03-07):
 1391: # The premier of Nunavut has issued a ministerial statement advising
 1392: # that effective 2001-04-01, the territory of Nunavut will revert
 1393: # back to three time zones (mountain, central, and eastern).  Of the
 1394: # cities in Nunavut, Coral Harbor is the only one that I know of that
 1395: # has said it will not observe dst, staying on EST year round.  I'm
 1396: # checking for more info, and will get back to you if I come up with
 1397: # more.
 1398: # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]
 1399: 
 1400: # From Gwillim Law (2005-05-21):
 1401: # According to maps at
 1402: # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg
 1403: # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg
 1404: # (both dated 2003), and
 1405: # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp
 1406: # (from a 1998 Canadian Geographic article), the de facto and de jure time
 1407: # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year
 1408: # round.  Using Google, it's easy to find other websites that confirm this.
 1409: # I wasn't able to find how far back this time regimen goes, but since it
 1410: # predates the creation of Nunavut, it probably goes back many years....
 1411: # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used.
 1412: #
 1413: # From Paul Eggert (2005-07-26):
 1414: # For lack of better information, assume that Southampton Island observed
 1415: # daylight saving only during wartime.
 1416: 
 1417: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1418: Rule	NT_YK	1918	only	-	Apr	14	2:00	1:00	D
 1419: Rule	NT_YK	1918	only	-	Oct	27	2:00	0	S
 1420: Rule	NT_YK	1919	only	-	May	25	2:00	1:00	D
 1421: Rule	NT_YK	1919	only	-	Nov	 1	0:00	0	S
 1422: Rule	NT_YK	1942	only	-	Feb	 9	2:00	1:00	W # War
 1423: Rule	NT_YK	1945	only	-	Aug	14	23:00u	1:00	P # Peace
 1424: Rule	NT_YK	1945	only	-	Sep	30	2:00	0	S
 1425: Rule	NT_YK	1965	only	-	Apr	lastSun	0:00	2:00	DD
 1426: Rule	NT_YK	1965	only	-	Oct	lastSun	2:00	0	S
 1427: Rule	NT_YK	1980	1986	-	Apr	lastSun	2:00	1:00	D
 1428: Rule	NT_YK	1980	max	-	Oct	lastSun	2:00	0	S
 1429: Rule	NT_YK	1987	max	-	Apr	Sun>=1	2:00	1:00	D
 1430: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1431: Zone America/Pangnirtung -4:22:56 -	LMT	1884
 1432: 			-4:00	NT_YK	A%sT	1995 Apr Sun>=1 2:00
 1433: 			-5:00	Canada	E%sT	1999 Oct 31 2:00
 1434: 			-6:00	Canada	C%sT	2000 Oct 29 2:00
 1435: 			-5:00	Canada	E%sT
 1436: Zone America/Iqaluit	-4:33:52 -	LMT	1884 # Frobisher Bay before 1987
 1437: 			-5:00	NT_YK	E%sT	1999 Oct 31 2:00
 1438: 			-6:00	Canada	C%sT	2000 Oct 29 2:00
 1439: 			-5:00	Canada	E%sT
 1440: Zone America/Coral_Harbour -5:32:40 -	LMT	1884
 1441: 			-5:00	NT_YK	E%sT	1946
 1442: 			-5:00	-	EST
 1443: Zone America/Rankin_Inlet -6:08:40 -	LMT	1884
 1444: 			-6:00	NT_YK	C%sT	2000 Oct 29 2:00
 1445: 			-5:00	-	EST	2001 Apr  1 3:00
 1446: 			-6:00	Canada	C%sT
 1447: Zone America/Cambridge_Bay -7:00:20 -	LMT	1884
 1448: 			-7:00	NT_YK	M%sT	1999 Oct 31 2:00
 1449: 			-6:00	Canada	C%sT	2000 Oct 29 2:00
 1450: 			-5:00	-	EST	2000 Nov  5 0:00
 1451: 			-6:00	-	CST	2001 Apr  1 3:00
 1452: 			-7:00	Canada	M%sT
 1453: Zone America/Yellowknife -7:37:24 -	LMT	1884
 1454: 			-7:00	NT_YK	M%sT
 1455: Zone America/Inuvik	-8:54:00 -	LMT	1884
 1456: 			-8:00	NT_YK	P%sT	1979 Apr lastSun 2:00
 1457: 			-7:00	NT_YK	M%sT
 1458: Zone America/Whitehorse	-9:00:12 -	LMT	1900 Aug 20
 1459: 			-9:00	NT_YK	Y%sT	1966 Jul 1 2:00
 1460: 			-8:00	NT_YK	P%sT
 1461: Zone America/Dawson	-9:17:40 -	LMT	1900 Aug 20
 1462: 			-9:00	NT_YK	Y%sT	1973 Oct 28 0:00
 1463: 			-8:00	NT_YK	P%sT
 1464: 
 1465: 
 1466: ###############################################################################
 1467: 
 1468: # Mexico
 1469: 
 1470: # From Paul Eggert (2001-03-05):
 1471: # The Investigation and Analysis Service of the
 1472: # Mexican Library of Congress (MLoC) has published a
 1473: # <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/">
 1474: # history of Mexican local time (in Spanish)
 1475: # </a>.
 1476: #
 1477: # Here are the discrepancies between Shanks and the MLoC.
 1478: # (In all cases we go with the MLoC.)
 1479: # Shanks reports that Baja was at -8:00 in 1922/1923.
 1480: # Shanks says the 1930 transition in Baja was 1930-11-16.
 1481: # Shanks reports no DST during summer 1931.
 1482: # Shanks reports a transition at 1932-03-30 23:00, not 1932-04-01.
 1483: # Shanks does not report transitions for Baja in 1945 or 1948.
 1484: # Shanks reports southern Mexico transitions on 1981-12-01, not 12-23.
 1485: # Shanks says Quintana Roo switched to -6:00 on 1982-12-02, and to -5:00
 1486: # on 1997-10-26 at 02:00.
 1487: 
 1488: # From Gwillim Law (2001-02-20):
 1489: # There are some other discrepancies between the Decrees page and the
 1490: # tz database.  I think they can best be explained by supposing that
 1491: # the researchers who prepared the Decrees page failed to find some of
 1492: # the relevant documents.
 1493: 
 1494: # From Paul Eggert (2000-07-26):
 1495: # Shanks gives 1942-04-01 instead of 1942-04-24, and omits the 1981
 1496: # and 1988 DST experiments.  Go with spin.com.mx.
 1497: 
 1498: # From Alan Perry (1996-02-15):
 1499: # A guy from our Mexico subsidiary finally found the Presidential Decree
 1500: # outlining the timezone changes in Mexico.
 1501: #
 1502: # ------------- Begin Forwarded Message -------------
 1503: #
 1504: # I finally got my hands on the Official Presidential Decree that sets up the
 1505: # rules for the DST changes. The rules are:
 1506: #
 1507: # 1. The country is divided in 3 timezones:
 1508: #    - Baja California Norte (the Mexico/BajaNorte TZ)
 1509: #    - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)
 1510: #    - The rest of the country (the Mexico/General TZ)
 1511: #
 1512: # 2. From the first Sunday in April at 2:00 AM to the last Sunday in October
 1513: #    at 2:00 AM, the times in each zone are as follows:
 1514: #    BajaNorte: GMT+7
 1515: #    BajaSur:   GMT+6
 1516: #    General:   GMT+5
 1517: #
 1518: # 3. The rest of the year, the times are as follows:
 1519: #    BajaNorte: GMT+8
 1520: #    BajaSur:   GMT+7
 1521: #    General:   GMT+6
 1522: #
 1523: # The Decree was published in Mexico's Official Newspaper on January 4th.
 1524: #
 1525: # -------------- End Forwarded Message --------------
 1526: # From Paul Eggert (1996-06-12):
 1527: # For an English translation of the decree, see
 1528: # <a href="http://mexico-travel.com/extra/timezone_eng.html">
 1529: # ``Diario Oficial: Time Zone Changeover'' (1996-01-04).
 1530: # </a>
 1531: 
 1532: # From Rives McDow (1998-10-08):
 1533: # The State of Quintana Roo has reverted back to central STD and DST times
 1534: # (i.e. UTC -0600 and -0500 as of 1998-08-02).
 1535: 
 1536: # From Rives McDow (2000-01-10):
 1537: # Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time
 1538: # zone 5 hours from the International Date Line, and will not observe daylight
 1539: # savings time so as to stay on the same time zone as the southern part of
 1540: # Arizona year round.
 1541: 
 1542: # From Jesper Norgaard, translating
 1543: # <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):
 1544: # In Oaxaca, the 55.000 teachers from the Section 22 of the National
 1545: # Syndicate of Education Workers, refuse to apply daylight saving each
 1546: # year, so that the more than 10,000 schools work at normal hour the
 1547: # whole year.
 1548: 
 1549: # From Gwillim Law (2001-01-19):
 1550: # <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says
 1551: # (translated):...
 1552: # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced
 1553: # that Summer Time will be reduced from seven to five months, starting
 1554: # this year....
 1555: # <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001>
 1556: # [translated], says "summer time will ... take effect on the first Sunday
 1557: # in May, and end on the last Sunday of September.
 1558: 
 1559: # From Arthur David Olson (2001-01-25):
 1560: # The 2001-01-24 traditional Washington Post contained the page one
 1561: # story "Timely Issue Divides Mexicans."...
 1562: # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
 1563: # ... Mexico City Mayor Lopez Obrador "...is threatening to keep
 1564: # Mexico City and its 20 million residents on a different time than
 1565: # the rest of the country..." In particular, Lopez Obrador would abolish
 1566: # observation of Daylight Saving Time.
 1567: 
 1568: # <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre">
 1569: # Official statute published by the Energy Department
 1570: # </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
 1571: # and Sonora with no DST.  This was reported by Jesper Norgaard (2001-02-03).
 1572: 
 1573: # From Paul Eggert (2001-03-03):
 1574: #
 1575: # <a href="http://www.latimes.com/news/nation/20010303/t000018766.html">
 1576: # James F. Smith writes in today's LA Times
 1577: # </a>
 1578: # * Sonora will continue to observe standard time.
 1579: # * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that
 1580: #   the Federal District will not adopt DST.
 1581: # * 4 of 16 district leaders announced they'll ignore the decree.
 1582: # * The decree does not affect federal-controlled facilities including
 1583: #   the airport, banks, hospitals, and schools.
 1584: #
 1585: # For now we'll assume that the Federal District will bow to federal rules.
 1586: 
 1587: # From Jesper Norgaard (2001-04-01):
 1588: # I found some references to the Mexican application of daylight
 1589: # saving, which modifies what I had already sent you, stating earlier
 1590: # that a number of northern Mexican states would go on daylight
 1591: # saving. The modification reverts this to only cover Baja California
 1592: # (Norte), while all other states (except Sonora, who has no daylight
 1593: # saving all year) will follow the original decree of president
 1594: # Vicente Fox, starting daylight saving May 6, 2001 and ending
 1595: # September 30, 2001.
 1596: # References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp>
 1597: # Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)
 1598: 
 1599: # From Reuters (2001-09-04):
 1600: # Mexico's Supreme Court on Tuesday declared that daylight savings was
 1601: # unconstitutional in Mexico City, creating the possibility the
 1602: # capital will be in a different time zone from the rest of the nation
 1603: # next year....  The Supreme Court's ruling takes effect at 2:00
 1604: # a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to
 1605: # standard time. "This is so residents of the Federal District are not
 1606: # subject to unexpected time changes," a statement from the court said.
 1607: 
 1608: # From Jesper Norgaard Welen (2002-03-12):
 1609: # ... consulting my local grocery store(!) and my coworkers, they all insisted
 1610: # that a new decision had been made to reinstate US style DST in Mexico....
 1611: # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20)
 1612: # confirms this.  Sonora as usual is the only state where DST is not applied.
 1613: 
 1614: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1615: Rule	Mexico	1939	only	-	Feb	5	0:00	1:00	D
 1616: Rule	Mexico	1939	only	-	Jun	25	0:00	0	S
 1617: Rule	Mexico	1940	only	-	Dec	9	0:00	1:00	D
 1618: Rule	Mexico	1941	only	-	Apr	1	0:00	0	S
 1619: Rule	Mexico	1943	only	-	Dec	16	0:00	1:00	W # War
 1620: Rule	Mexico	1944	only	-	May	1	0:00	0	S
 1621: Rule	Mexico	1950	only	-	Feb	12	0:00	1:00	D
 1622: Rule	Mexico	1950	only	-	Jul	30	0:00	0	S
 1623: Rule	Mexico	1996	2000	-	Apr	Sun>=1	2:00	1:00	D
 1624: Rule	Mexico	1996	2000	-	Oct	lastSun	2:00	0	S
 1625: Rule	Mexico	2001	only	-	May	Sun>=1	2:00	1:00	D
 1626: Rule	Mexico	2001	only	-	Sep	lastSun	2:00	0	S
 1627: Rule	Mexico	2002	max	-	Apr	Sun>=1	2:00	1:00	D
 1628: Rule	Mexico	2002	max	-	Oct	lastSun	2:00	0	S
 1629: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1630: # Quintana Roo
 1631: Zone America/Cancun	-5:47:04 -	LMT	1922 Jan  1  0:12:56
 1632: 			-6:00	-	CST	1981 Dec 23
 1633: 			-5:00	Mexico	E%sT	1998 Aug  2  2:00
 1634: 			-6:00	Mexico	C%sT
 1635: # Campeche, Yucatan
 1636: Zone America/Merida	-5:58:28 -	LMT	1922 Jan  1  0:01:32
 1637: 			-6:00	-	CST	1981 Dec 23
 1638: 			-5:00	-	EST	1982 Dec  2
 1639: 			-6:00	Mexico	C%sT
 1640: # Coahuila, Durango, Nuevo Leon, Tamaulipas
 1641: Zone America/Monterrey	-6:41:16 -	LMT	1921 Dec 31 23:18:44
 1642: 			-6:00	-	CST	1988
 1643: 			-6:00	US	C%sT	1989
 1644: 			-6:00	Mexico	C%sT
 1645: # Central Mexico
 1646: Zone America/Mexico_City -6:36:36 -	LMT	1922 Jan  1  0:23:24
 1647: 			-7:00	-	MST	1927 Jun 10 23:00
 1648: 			-6:00	-	CST	1930 Nov 15
 1649: 			-7:00	-	MST	1931 May  1 23:00
 1650: 			-6:00	-	CST	1931 Oct
 1651: 			-7:00	-	MST	1932 Apr  1
 1652: 			-6:00	Mexico	C%sT	2001 Sep 30 02:00
 1653: 			-6:00	-	CST	2002 Feb 20
 1654: 			-6:00	Mexico	C%sT
 1655: # Chihuahua
 1656: Zone America/Chihuahua	-7:04:20 -	LMT	1921 Dec 31 23:55:40
 1657: 			-7:00	-	MST	1927 Jun 10 23:00
 1658: 			-6:00	-	CST	1930 Nov 15
 1659: 			-7:00	-	MST	1931 May  1 23:00
 1660: 			-6:00	-	CST	1931 Oct
 1661: 			-7:00	-	MST	1932 Apr  1
 1662: 			-6:00	-	CST	1996
 1663: 			-6:00	Mexico	C%sT	1998
 1664: 			-6:00	-	CST	1998 Apr Sun>=1 3:00
 1665: 			-7:00	Mexico	M%sT
 1666: # Sonora
 1667: Zone America/Hermosillo	-7:23:52 -	LMT	1921 Dec 31 23:36:08
 1668: 			-7:00	-	MST	1927 Jun 10 23:00
 1669: 			-6:00	-	CST	1930 Nov 15
 1670: 			-7:00	-	MST	1931 May  1 23:00
 1671: 			-6:00	-	CST	1931 Oct
 1672: 			-7:00	-	MST	1932 Apr  1
 1673: 			-6:00	-	CST	1942 Apr 24
 1674: 			-7:00	-	MST	1949 Jan 14
 1675: 			-8:00	-	PST	1970
 1676: 			-7:00	Mexico	M%sT	1999
 1677: 			-7:00	-	MST
 1678: # Baja California Sur, Nayarit, Sinaloa
 1679: Zone America/Mazatlan	-7:05:40 -	LMT	1921 Dec 31 23:54:20
 1680: 			-7:00	-	MST	1927 Jun 10 23:00
 1681: 			-6:00	-	CST	1930 Nov 15
 1682: 			-7:00	-	MST	1931 May  1 23:00
 1683: 			-6:00	-	CST	1931 Oct
 1684: 			-7:00	-	MST	1932 Apr  1
 1685: 			-6:00	-	CST	1942 Apr 24
 1686: 			-7:00	-	MST	1949 Jan 14
 1687: 			-8:00	-	PST	1970
 1688: 			-7:00	Mexico	M%sT
 1689: # Baja California
 1690: Zone America/Tijuana	-7:48:04 -	LMT	1922 Jan  1  0:11:56
 1691: 			-7:00	-	MST	1924
 1692: 			-8:00	-	PST	1927 Jun 10 23:00
 1693: 			-7:00	-	MST	1930 Nov 15
 1694: 			-8:00	-	PST	1931 Apr  1
 1695: 			-8:00	1:00	PDT	1931 Sep 30
 1696: 			-8:00	-	PST	1942 Apr 24
 1697: 			-8:00	1:00	PWT	1945 Nov 12
 1698: 			-8:00	-	PST	1948 Apr  5
 1699: 			-8:00	1:00	PDT	1949 Jan 14
 1700: 			-8:00	-	PST	1954
 1701: 			-8:00	CA	P%sT	1961
 1702: 			-8:00	-	PST	1976
 1703: 			-8:00	US	P%sT	1996
 1704: 			-8:00	Mexico	P%sT	2001
 1705: 			-8:00	US	P%sT	2002 Feb 20
 1706: 			-8:00	Mexico	P%sT
 1707: # From Paul Eggert (2001-03-05):
 1708: # Formerly there was an America/Ensenada zone, which differed from
 1709: # America/Tijuana only in that it did not observe DST from 1976
 1710: # through 1995.  This was as per Shanks.  However, Guy Harris reports
 1711: # that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and
 1712: # Tijuana observe DST," which contradicts Shanks but does imply that
 1713: # DST-observance was a town-by-town matter back then.  This concerns
 1714: # data after 1970 so most likely there should be at least one Zone
 1715: # other than America/Tijuana for Baja, but it's not clear yet what its
 1716: # name or contents should be.
 1717: #
 1718: # Revillagigedo Is
 1719: # no information
 1720: 
 1721: ###############################################################################
 1722: 
 1723: # Anguilla
 1724: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1725: Zone America/Anguilla	-4:12:16 -	LMT	1912 Mar 2
 1726: 			-4:00	-	AST
 1727: 
 1728: # Antigua and Barbuda
 1729: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1730: Zone	America/Antigua	-4:07:12 -	LMT	1912 Mar 2
 1731: 			-5:00	-	EST	1951
 1732: 			-4:00	-	AST
 1733: 
 1734: # Bahamas
 1735: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1736: Rule	Bahamas	1964	max	-	Oct	lastSun	2:00	0	S
 1737: Rule	Bahamas	1964	1986	-	Apr	lastSun	2:00	1:00	D
 1738: Rule	Bahamas	1987	max	-	Apr	Sun>=1	2:00	1:00	D
 1739: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1740: Zone	America/Nassau	-5:09:24 -	LMT	1912 Mar 2
 1741: 			-5:00	Bahamas	E%sT
 1742: 
 1743: # Barbados
 1744: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1745: Rule	Barb	1977	only	-	Jun	12	2:00	1:00	D
 1746: Rule	Barb	1977	1978	-	Oct	Sun>=1	2:00	0	S
 1747: Rule	Barb	1978	1980	-	Apr	Sun>=15	2:00	1:00	D
 1748: Rule	Barb	1979	only	-	Sep	30	2:00	0	S
 1749: Rule	Barb	1980	only	-	Sep	25	2:00	0	S
 1750: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1751: Zone America/Barbados	-3:58:28 -	LMT	1924		# Bridgetown
 1752: 			-3:58:28 -	BMT	1932	  # Bridgetown Mean Time
 1753: 			-4:00	Barb	A%sT
 1754: 
 1755: # Belize
 1756: # Whitman entirely disagrees with Shanks; go with Shanks.
 1757: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1758: Rule	Belize	1918	1942	-	Oct	Sun>=2	0:00	0:30	HD
 1759: Rule	Belize	1919	1943	-	Feb	Sun>=9	0:00	0	S
 1760: Rule	Belize	1973	only	-	Dec	 5	0:00	1:00	D
 1761: Rule	Belize	1974	only	-	Feb	 9	0:00	0	S
 1762: Rule	Belize	1982	only	-	Dec	18	0:00	1:00	D
 1763: Rule	Belize	1983	only	-	Feb	12	0:00	0	S
 1764: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1765: Zone	America/Belize	-5:52:48 -	LMT	1912 Apr
 1766: 			-6:00	Belize	C%sT
 1767: 
 1768: # Bermuda
 1769: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1770: Zone Atlantic/Bermuda	-4:19:04 -	LMT	1930 Jan  1 2:00    # Hamilton
 1771: 			-4:00	-	AST	1974 Apr 28 2:00
 1772: 			-4:00	Bahamas	A%sT
 1773: 
 1774: # Cayman Is
 1775: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1776: Zone	America/Cayman	-5:25:32 -	LMT	1890		# Georgetown
 1777: 			-5:07:12 -	KMT	1912 Feb    # Kingston Mean Time
 1778: 			-5:00	-	EST
 1779: 
 1780: # Costa Rica
 1781: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1782: Rule	CR	1979	1980	-	Feb	lastSun	0:00	1:00	D
 1783: Rule	CR	1979	1980	-	Jun	Sun>=1	0:00	0	S
 1784: Rule	CR	1991	1992	-	Jan	Sat>=15	0:00	1:00	D
 1785: # IATA SSIM (1991-09) says the following was at 1:00; go with Shanks.
 1786: Rule	CR	1991	only	-	Jul	 1	0:00	0	S
 1787: Rule	CR	1992	only	-	Mar	15	0:00	0	S
 1788: # There are too many San Joses elsewhere, so we'll use `Costa Rica'.
 1789: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1790: Zone America/Costa_Rica	-5:36:20 -	LMT	1890		# San Jose
 1791: 			-5:36:20 -	SJMT	1921 Jan 15 # San Jose Mean Time
 1792: 			-6:00	CR	C%sT
 1793: # Coco
 1794: # no information; probably like America/Costa_Rica
 1795: 
 1796: # Cuba
 1797: 
 1798: # From Arthur David Olson (1999-03-29):
 1799: # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
 1800: # the Cuban National Team and the Baltimore Orioles was carried live on
 1801: # the Orioles Radio Network, including affiliate WTOP in Washington, DC.
 1802: # During the game, play-by-play announcer Jim Hunter noted that
 1803: # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
 1804: # Time today."  (The "two hour" remark referred to losing one hour of
 1805: # sleep on 1999-03-28--when the announcers were in Cuba as it switched
 1806: # to DST--and one more hour on 1999-04-04--when the announcers will have
 1807: # returned to Baltimore, which switches on that date.)
 1808: 
 1809: # From Evert van der Veer via Steffen Thorsen (2004-10-28):
 1810: # Cuba is not going back to standard time this year.
 1811: # From Paul Eggert (2004-10-28):
 1812: # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html
 1813: # says that it's due to a problem at the Antonio Guiteras
 1814: # thermoelectric plant, and says "This October there will be no return
 1815: # to normal hours (after daylight saving time)".
 1816: # For now, let's assume that it's a one-year temporary measure.
 1817: 
 1818: # From Carlos A. Carnero Delgado (2005-11-12):
 1819: # This year (just like in 2004-2005) there's no change in time zone
 1820: # adjustment in Cuba.  We will stay in daylight saving time:
 1821: # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html
 1822: 
 1823: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1824: Rule	Cuba	1928	only	-	Jun	10	0:00	1:00	D
 1825: Rule	Cuba	1928	only	-	Oct	10	0:00	0	S
 1826: Rule	Cuba	1940	1942	-	Jun	Sun>=1	0:00	1:00	D
 1827: Rule	Cuba	1940	1942	-	Sep	Sun>=1	0:00	0	S
 1828: Rule	Cuba	1945	1946	-	Jun	Sun>=1	0:00	1:00	D
 1829: Rule	Cuba	1945	1946	-	Sep	Sun>=1	0:00	0	S
 1830: Rule	Cuba	1965	only	-	Jun	1	0:00	1:00	D
 1831: Rule	Cuba	1965	only	-	Sep	30	0:00	0	S
 1832: Rule	Cuba	1966	only	-	May	29	0:00	1:00	D
 1833: Rule	Cuba	1966	only	-	Oct	2	0:00	0	S
 1834: Rule	Cuba	1967	only	-	Apr	8	0:00	1:00	D
 1835: Rule	Cuba	1967	1968	-	Sep	Sun>=8	0:00	0	S
 1836: Rule	Cuba	1968	only	-	Apr	14	0:00	1:00	D
 1837: Rule	Cuba	1969	1977	-	Apr	lastSun	0:00	1:00	D
 1838: Rule	Cuba	1969	1971	-	Oct	lastSun	0:00	0	S
 1839: Rule	Cuba	1972	1974	-	Oct	8	0:00	0	S
 1840: Rule	Cuba	1975	1977	-	Oct	lastSun	0:00	0	S
 1841: Rule	Cuba	1978	only	-	May	7	0:00	1:00	D
 1842: Rule	Cuba	1978	1990	-	Oct	Sun>=8	0:00	0	S
 1843: Rule	Cuba	1979	1980	-	Mar	Sun>=15	0:00	1:00	D
 1844: Rule	Cuba	1981	1985	-	May	Sun>=5	0:00	1:00	D
 1845: Rule	Cuba	1986	1989	-	Mar	Sun>=14	0:00	1:00	D
 1846: Rule	Cuba	1990	1997	-	Apr	Sun>=1	0:00	1:00	D
 1847: Rule	Cuba	1991	1995	-	Oct	Sun>=8	0:00s	0	S
 1848: Rule	Cuba	1996	only	-	Oct	 6	0:00s	0	S
 1849: Rule	Cuba	1997	only	-	Oct	12	0:00s	0	S
 1850: Rule	Cuba	1998	1999	-	Mar	lastSun	0:00s	1:00	D
 1851: Rule	Cuba	1998	2003	-	Oct	lastSun	0:00s	0	S
 1852: Rule	Cuba	2000	max	-	Apr	Sun>=1	0:00s	1:00	D
 1853: Rule	Cuba	2006	max	-	Oct	lastSun	0:00s	0	S
 1854: 
 1855: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1856: Zone	America/Havana	-5:29:28 -	LMT	1890
 1857: 			-5:29:36 -	HMT	1925 Jul 19 12:00 # Havana MT
 1858: 			-5:00	Cuba	C%sT
 1859: 
 1860: # Dominica
 1861: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1862: Zone America/Dominica	-4:05:36 -	LMT	1911 Jul 1 0:01		# Roseau
 1863: 			-4:00	-	AST
 1864: 
 1865: # Dominican Republic
 1866: 
 1867: # From Steffen Thorsen (2000-10-30):
 1868: # Enrique Morales reported to me that the Dominican Republic has changed the
 1869: # time zone to Eastern Standard Time as of Sunday 29 at 2 am....
 1870: # http://www.listin.com.do/antes/261000/republica/princi.html
 1871: 
 1872: # From Paul Eggert (2000-12-04):
 1873: # That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
 1874: 
 1875: # From Rives McDow (2000-12-01):
 1876: # Dominican Republic changed its mind and presidential decree on Tuesday,
 1877: # November 28, 2000, with a new decree.  On Sunday, December 3 at 1:00 AM the
 1878: # Dominican Republic will be reverting to 8 hours from the International Date
 1879: # Line, and will not be using DST in the foreseeable future.  The reason they
 1880: # decided to use DST was to be in synch with Puerto Rico, who was also going
 1881: # to implement DST.  When Puerto Rico didn't implement DST, the president
 1882: # decided to revert.
 1883: 
 1884: 
 1885: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1886: Rule	DR	1966	only	-	Oct	30	0:00	1:00	D
 1887: Rule	DR	1967	only	-	Feb	28	0:00	0	S
 1888: Rule	DR	1969	1973	-	Oct	lastSun	0:00	0:30	HD
 1889: Rule	DR	1970	only	-	Feb	21	0:00	0	S
 1890: Rule	DR	1971	only	-	Jan	20	0:00	0	S
 1891: Rule	DR	1972	1974	-	Jan	21	0:00	0	S
 1892: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1893: Zone America/Santo_Domingo -4:39:36 -	LMT	1890
 1894: 			-4:40	-	SDMT	1933 Apr  1 12:00 # S. Dom. MT
 1895: 			-5:00	DR	E%sT	1974 Oct 27
 1896: 			-4:00	-	AST	2000 Oct 29 02:00
 1897: 			-5:00	US	E%sT	2000 Dec  3 01:00
 1898: 			-4:00	-	AST
 1899: 
 1900: # El Salvador
 1901: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1902: Rule	Salv	1987	1988	-	May	Sun>=1	0:00	1:00	D
 1903: Rule	Salv	1987	1988	-	Sep	lastSun	0:00	0	S
 1904: # There are too many San Salvadors elsewhere, so use America/El_Salvador
 1905: # instead of America/San_Salvador.
 1906: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1907: Zone America/El_Salvador -5:56:48 -	LMT	1921		# San Salvador
 1908: 			-6:00	Salv	C%sT
 1909: 
 1910: # Grenada
 1911: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1912: Zone	America/Grenada	-4:07:00 -	LMT	1911 Jul	# St George's
 1913: 			-4:00	-	AST
 1914: 
 1915: # Guadeloupe
 1916: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1917: Zone America/Guadeloupe	-4:06:08 -	LMT	1911 Jun 8	# Pointe a Pitre
 1918: 			-4:00	-	AST
 1919: 
 1920: # Guatemala
 1921: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1922: Rule	Guat	1973	only	-	Nov	25	0:00	1:00	D
 1923: Rule	Guat	1974	only	-	Feb	24	0:00	0	S
 1924: Rule	Guat	1983	only	-	May	21	0:00	1:00	D
 1925: Rule	Guat	1983	only	-	Sep	22	0:00	0	S
 1926: Rule	Guat	1991	only	-	Mar	23	0:00	1:00	D
 1927: Rule	Guat	1991	only	-	Sep	 7	0:00	0	S
 1928: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1929: Zone America/Guatemala	-6:02:04 -	LMT	1918 Oct 5
 1930: 			-6:00	Guat	C%sT
 1931: 
 1932: # Haiti
 1933: # From Gwillim Law (2005-04-15):
 1934: # Risto O. Nykanen wrote me that Haiti is now on DST.
 1935: # I searched for confirmation, and I found a
 1936: # <a href="http://www.haitianconsulate.org/time.doc"> press release
 1937: # on the Web page of the Haitian Consulate in Chicago (2005-03-31),
 1938: # </a>.  Translated from French, it says:
 1939: #
 1940: #  "The Prime Minister's Communication Office notifies the public in general
 1941: #   and the press in particular that, following a decision of the Interior
 1942: #   Ministry and the Territorial Collectivities [I suppose that means the
 1943: #   provinces], Haiti will move to Eastern Daylight Time in the night from next
 1944: #   Saturday the 2nd to Sunday the 3rd.
 1945: #
 1946: #  "Consequently, the Prime Minister's Communication Office wishes to inform
 1947: #   the population that the country's clocks will be set forward one hour
 1948: #   starting at midnight.  This provision will hold until the last Saturday in
 1949: #   October 2005.
 1950: #
 1951: #  "Port-au-Prince, March 31, 2005"
 1952: 
 1953: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 1954: Rule	Haiti	1983	only	-	May	8	0:00	1:00	D
 1955: Rule	Haiti	1984	1987	-	Apr	lastSun	0:00	1:00	D
 1956: Rule	Haiti	1983	1987	-	Oct	lastSun	0:00	0	S
 1957: # Shanks says AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.  Go with IATA.
 1958: Rule	Haiti	1988	1997	-	Apr	Sun>=1	1:00s	1:00	D
 1959: Rule	Haiti	1988	1997	-	Oct	lastSun	1:00s	0	S
 1960: Rule	Haiti	2005	only	-	Apr	Sun>=1	0:00	1:00	D
 1961: Rule	Haiti	2005	only	-	Oct	lastSun	0:00	0	S
 1962: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1963: Zone America/Port-au-Prince -4:49:20 -	LMT	1890
 1964: 			-4:49	-	PPMT	1917 Jan 24 12:00 # P-a-P MT
 1965: 			-5:00	Haiti	E%sT
 1966: 
 1967: # Honduras
 1968: # Shanks says 1921 Jan 1; go with Whitman's more precise Apr 1.
 1969: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1970: Zone America/Tegucigalpa -5:48:52 -	LMT	1921 Apr
 1971: 			-6:00	Salv	C%sT
 1972: #
 1973: # Great Swan I ceded by US to Honduras in 1972
 1974: 
 1975: # Jamaica
 1976: 
 1977: # From Bob Devine (1988-01-28):
 1978: # Follows US rules.
 1979: 
 1980: # From U. S. Naval Observatory (1989-01-19):
 1981: # JAMAICA             5 H  BEHIND UTC
 1982: 
 1983: # From Shanks:
 1984: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1985: Zone	America/Jamaica	-5:07:12 -	LMT	1890		# Kingston
 1986: 			-5:07:12 -	KMT	1912 Feb    # Kingston Mean Time
 1987: 			-5:00	-	EST	1974 Apr 28 2:00
 1988: 			-5:00	US	E%sT	1984
 1989: 			-5:00	-	EST
 1990: 
 1991: # Martinique
 1992: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 1993: Zone America/Martinique	-4:04:20 -      LMT	1890		# Fort-de-France
 1994: 			-4:04:20 -	FFMT	1911 May     # Fort-de-France MT
 1995: 			-4:00	-	AST	1980 Apr  6
 1996: 			-4:00	1:00	ADT	1980 Sep 28
 1997: 			-4:00	-	AST
 1998: 
 1999: # Montserrat
 2000: # From Paul Eggert (1997-08-31):
 2001: # Recent volcanic eruptions have forced evacuation of Plymouth, the capital.
 2002: # Luckily, Olveston, the current de facto capital, has the same longitude.
 2003: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2004: Zone America/Montserrat	-4:08:52 -	LMT	1911 Jul 1 0:01   # Olveston
 2005: 			-4:00	-	AST
 2006: 
 2007: # Nicaragua
 2008: #
 2009: # From Steffen Thorsen (1998-12-29):
 2010: # Nicaragua seems to be back at -6:00 but I have not been able to find when
 2011: # they changed from -5:00.
 2012: #
 2013: # From Steffen Thorsen (2005-04-12):
 2014: # I've got reports from 8 different people that Nicaragua just started
 2015: # DST on Sunday 2005-04-10, in order to save energy because of
 2016: # expensive petroleum.  The exact end date for DST is not yet
 2017: # announced, only "September" but some sites also say "mid-September".
 2018: # Some background information is available on the President's official site:
 2019: # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm
 2020: # The Decree, no 23-2005 is available here:
 2021: # 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
 2022: #
 2023: # From Paul Eggert (2005-05-01):
 2024: # The decree doesn't say anything about daylight saving, but for now let's
 2025: # assume that it is daylight saving and that they'll switch back on the
 2026: # 3rd Sunday in September.
 2027: #
 2028: # From Gwillim Law (2005-04-21):
 2029: # The Associated Press story on the time change, which can be found at
 2030: # http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html
 2031: # and elsewhere, says (fifth paragraph, translated from Spanish):  "The last
 2032: # time that a change of clocks was applied to save energy was in the year 2000
 2033: # during the Arnoldo Aleman administration."...
 2034: # The northamerica file says that Nicaragua has been on UTC-6 continuously
 2035: # since December 1998.  I wasn't able to find any details of Nicaraguan time
 2036: # changes in 2000.  Perhaps a note could be added to the northamerica file, to
 2037: # the effect that we have indirect evidence that DST was observed in 2000.
 2038: #
 2039: # From Jesper Norgaard Welen (2005-11-02):
 2040: # Nicaragua left DST the 2005-10-02 at 00:00 (local time).
 2041: # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm
 2042: # (2005-09-26)
 2043: #
 2044: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 2045: Rule	Nic	1979	1980	-	Mar	Sun>=16	0:00	1:00	D
 2046: Rule	Nic	1979	1980	-	Jun	Mon>=23	0:00	0	S
 2047: Rule	Nic	1992	only	-	Jan	 1	4:00	1:00	D
 2048: Rule	Nic	1992	only	-	Sep	24	0:00	0	S
 2049: Rule	Nic	2005	only	-	Apr	10	0:00	1:00	D
 2050: Rule	Nic	2005	only	-	Oct	 2	0:00	0	S
 2051: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2052: Zone	America/Managua	-5:45:08 -	LMT	1890
 2053: 			-5:45:12 -	MMT	1934 Jun 23 # Managua Mean Time?
 2054: 			-6:00	-	CST	1973 May
 2055: 			-5:00	-	EST	1975 Feb 16
 2056: 			-6:00	Nic	C%sT	1993 Jan 1 4:00
 2057: 			-5:00	-	EST	1998 Dec
 2058: 			-6:00	Nic	C%sT
 2059: 
 2060: # Panama
 2061: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2062: Zone	America/Panama	-5:18:08 -	LMT	1890
 2063: 			-5:19:36 -	CMT	1908 Apr 22   # Colon Mean Time
 2064: 			-5:00	-	EST
 2065: 
 2066: # Puerto Rico
 2067: # There are too many San Juans elsewhere, so we'll use `Puerto_Rico'.
 2068: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2069: Zone America/Puerto_Rico -4:24:25 -	LMT	1899 Mar 28 12:00    # San Juan
 2070: 			-4:00	-	AST	1942 May  3
 2071: 			-4:00	1:00	AWT	1945 Sep 30  2:00
 2072: 			-4:00	-	AST
 2073: 
 2074: # St Kitts-Nevis
 2075: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2076: Zone America/St_Kitts	-4:10:52 -	LMT	1912 Mar 2	# Basseterre
 2077: 			-4:00	-	AST
 2078: 
 2079: # St Lucia
 2080: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2081: Zone America/St_Lucia	-4:04:00 -	LMT	1890		# Castries
 2082: 			-4:04:00 -	CMT	1912	    # Castries Mean Time
 2083: 			-4:00	-	AST
 2084: 
 2085: # St Pierre and Miquelon
 2086: # There are too many St Pierres elsewhere, so we'll use `Miquelon'.
 2087: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2088: Zone America/Miquelon	-3:44:40 -	LMT	1911 May 15	# St Pierre
 2089: 			-4:00	-	AST	1980 May
 2090: 			-3:00	-	PMST	1987 # Pierre & Miquelon Time
 2091: 			-3:00	Canada	PM%sT
 2092: 
 2093: # St Vincent and the Grenadines
 2094: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2095: Zone America/St_Vincent	-4:04:56 -	LMT	1890		# Kingstown
 2096: 			-4:04:56 -	KMT	1912	   # Kingstown Mean Time
 2097: 			-4:00	-	AST
 2098: 
 2099: # Turks and Caicos
 2100: # From Paul Eggert (1998-08-06):
 2101: # Shanks says they use US DST rules, but IATA SSIM (1991/1998)
 2102: # says they switch at midnight.  Go with IATA SSIM.
 2103: # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 2104: Rule	TC	1979	1986	-	Apr	lastSun	0:00	1:00	D
 2105: Rule	TC	1979	max	-	Oct	lastSun	0:00	0	S
 2106: Rule	TC	1987	max	-	Apr	Sun>=1	0:00	1:00	D
 2107: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2108: Zone America/Grand_Turk	-4:44:32 -	LMT	1890
 2109: 			-5:07:12 -	KMT	1912 Feb    # Kingston Mean Time
 2110: 			-5:00	TC	E%sT
 2111: 
 2112: # British Virgin Is
 2113: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2114: Zone America/Tortola	-4:18:28 -	LMT	1911 Jul    # Road Town
 2115: 			-4:00	-	AST
 2116: 
 2117: # Virgin Is
 2118: # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 2119: Zone America/St_Thomas	-4:19:44 -	LMT	1911 Jul    # Charlotte Amalie
 2120: 			-4:00	-	AST