Branch: Tag:

2007-02-01

2007-02-01 14:21:02 by Henrik Grubbström (Grubba) <grubba@grubba.org>

Updated to ftp://elsie.nci.nih.gov/pub/tzdata2007a.tar.gz.

Rev: lib/modules/Calendar.pmod/tzdata/africa:1.3
Rev: lib/modules/Calendar.pmod/tzdata/antarctica:1.2
Rev: lib/modules/Calendar.pmod/tzdata/asia:1.5
Rev: lib/modules/Calendar.pmod/tzdata/australasia:1.5
Rev: lib/modules/Calendar.pmod/tzdata/backward:1.4
Rev: lib/modules/Calendar.pmod/tzdata/etcetera:1.2
Rev: lib/modules/Calendar.pmod/tzdata/europe:1.5
Rev: lib/modules/Calendar.pmod/tzdata/factory:1.2
Rev: lib/modules/Calendar.pmod/tzdata/iso3166.tab:1.3
Rev: lib/modules/Calendar.pmod/tzdata/leapseconds:1.2
Rev: lib/modules/Calendar.pmod/tzdata/northamerica:1.5
Rev: lib/modules/Calendar.pmod/tzdata/pacificnew:1.2
Rev: lib/modules/Calendar.pmod/tzdata/solar87:1.2
Rev: lib/modules/Calendar.pmod/tzdata/solar88:1.2
Rev: lib/modules/Calendar.pmod/tzdata/solar89:1.2
Rev: lib/modules/Calendar.pmod/tzdata/southamerica:1.5
Rev: lib/modules/Calendar.pmod/tzdata/systemv:1.2
Rev: lib/modules/Calendar.pmod/tzdata/yearistype.sh:1.4
Rev: lib/modules/Calendar.pmod/tzdata/zone.tab:1.5

1: - # @(#)northamerica 7.54 + # @(#)northamerica 8.11 + # <pre> +    # also includes Central America and the Caribbean      # This data is by no means authoritative; if you think you know better,   # go ahead and edit the file (and please send any changes to   # tz@elsie.nci.nih.gov for general use in the future).    - # From Paul Eggert <eggert@twinsun.com> (1999-03-22): + # From Paul Eggert (1999-03-22):   # A reliable and entertaining source about time zones is   # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).   
24:   # His proposal was adopted by the railroads on 1883-11-18 at 12:00,   # and the most of the country soon followed suit.    - # From Paul Eggert <eggert@twinsun.com> (1995-12-19): + # From Paul Eggert (2005-04-16): + # That 1883 transition occurred at 12:00 new time, not at 12:00 old time. + # See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). +  + # From Paul Eggert (2006-03-22):   # A good source for time zone historical data in the US is   # Thomas G. Shanks, The American Atlas (5th edition),   # San Diego: ACS Publications, Inc. (1991).   # Make sure you have the errata sheet; the book is somewhat useless without it. - # It is the source for the US and Puerto Rico entries below. + # It is the source for most of the pre-1991 US entries below.    - # From Paul Eggert (1996-06-12): + # From Paul Eggert (2001-03-06):   # Daylight Saving Time was first suggested as a joke by Benjamin Franklin - # in his whimsical essay ``Turkey vs Eagle, McCauley is my Beagle'' (1784). + # in his whimsical essay ``An Economical Project for Diminishing the Cost + # of Light'' published in the Journal de Paris (1784-04-26).   # Not everyone is happy with the results:   #   # I don't really care how time is reckoned so long as there is some
47:   # to push people into bed earlier, and get them up earlier, to make   # them healthy, wealthy and wise in spite of themselves.   # - # -- Robertson Davies, The Diary of Samuel Marchbanks (1947), XIX, Sunday + # -- Robertson Davies, The diary of Samuel Marchbanks, + # Clarke, Irwin (1947), XIX, Sunday + # + # For more about the first ten years of DST in the United States, see + # Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html"> + # Ten years of daylight saving from the Pittsburgh standpoint + # (Carnegie Library of Pittsburgh, 1927)</a>. + # + # Shanks says that DST was called "War Time" in the US in 1918 and 1919. + # However, DST was imposed by the Standard Time Act of 1918, which + # was the first nationwide legal time standard, and apparently + # time was just called "Standard Time" or "Daylight Saving Time".      # From Arthur David Olson:   # US Daylight Saving Time ended on the last Sunday of *October* in 1974.
67:   # Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful."   # </a> (August 1945) by way of confirmation.    - # From Joseph Gallant <notquite@hotmail.com>, citing + # From Joseph Gallant citing   # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):   # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set - # to switch to London for Atlee's address, but the American people + # to switch to London for Attlee's address, but the American people   # never got to hear his speech live. According to one press account,   # CBS' Bob Trout was first to announce the word of Japan's surrender,   # but a few seconds later, NBC, ABC and Mutual also flashed the word   # of surrender, all of whom interrupting the bells of Big Ben in - # London which were to precede Mr. Atlee's speech. + # London which were to precede Mr. Attlee's speech.    - # From Paul Eggert (2000-10-02): - # Shanks says that DST was called "War Time" in the US in 1919. - # In the light of the above, this seems suspect; - # but we have no better authority yet. + # From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From + # Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: + # + # ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. + # Any announcement from Asia would reach St. John's New York newsroom on a + # wire service teletype machine, which had prescribed signals for major news. + # Associated Press, for example, would ring five bells before spewing out + # typed copy of an important story, and 10 bells for news "of transcendental + # importance." + # + # On Aug. 14, stalling while talking steadily into the NBC networks' open + # microphone, St. John heard five bells and waited only to hear a sixth bell, + # before announcing confidently: "Ladies and gentlemen, World War II is over. + # The Japanese have agreed to our surrender terms." + # + # He had scored a 20-second scoop on other broadcasters.    -  + # From Arthur David Olson (2005-08-22): + # Paul has been careful to use the "US" rules only in those locations + # that are part of the United States; this reflects the real scope of + # U.S. government action. So even though the "US" rules have changed + # in the latest release, other countries won't be affected.      # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S - Rule US 1918 1919 - Mar lastSun 2:00 1:00 W # War + Rule US 1918 1919 - Mar lastSun 2:00 1:00 D   Rule US 1918 1919 - Oct lastSun 2:00 0 S   Rule US 1942 only - Feb 9 2:00 1:00 W # War   Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace   Rule US 1945 only - Sep 30 2:00 0 S - Rule US 1967 max - Oct lastSun 2:00 0 S + Rule US 1967 2006 - Oct lastSun 2:00 0 S   Rule US 1967 1973 - Apr lastSun 2:00 1:00 D   Rule US 1974 only - Jan 6 2:00 1:00 D   Rule US 1975 only - Feb 23 2:00 1:00 D   Rule US 1976 1986 - Apr lastSun 2:00 1:00 D - Rule US 1987 max - Apr Sun>=1 2:00 1:00 D - # <a href="http://thomas.loc.gov/cgi-bin/bdquery/z?d106:h.r.00177:"> - # H.R.177 - # </a> (introduced 1999-01-06) would change April to March in the above rule. + Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D + Rule US 2007 max - Mar Sun>=8 2:00 1:00 D + Rule US 2007 max - Nov Sun>=1 2:00 0 S    -  + # From Arthur David Olson, 2005-12-19 + # We generate the files specified below to guard against old files with + # obsolete information being left in the time zone binary directory. + # We limit the list to names that have appeared in previous versions of + # this time zone package. + # We do these as separate Zones rather than as Links to avoid problems if + # a particular place changes whether it observes DST. + # We put these specifications here in the northamerica file both to + # increase the chances that they'll actually get compiled and to + # avoid the need to duplicate the US rules in another file. +  + # Zone NAME GMTOFF RULES FORMAT [UNTIL] + Zone EST -5:00 - EST + Zone MST -7:00 - MST + Zone HST -10:00 - HST + Zone EST5EDT -5:00 US E%sT + Zone CST6CDT -6:00 US C%sT + Zone MST7MDT -7:00 US M%sT + Zone PST8PDT -8:00 US P%sT +    # From Bob Devine (1988-01-28):   # ...Alaska (and Hawaii) had the timezone names changed in 1967.   # old new
171:   # Samoa standard time   # The law doesn't give abbreviations.   # - # From Paul Eggert (1995-12-19): - # Shanks uses 1983-10-30, not 1983-11-30, for the 1983 transitions. - # Go with Shanks. + # From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: + # Public law 106-564 (2000-12-23) introduced the abbreviation + # "Chamorro Standard Time" for time in Guam and the Northern Marianas. + # See the file "australasia".    - # US Eastern time, represented by New York + # From Arthur David Olson, 2005-08-09 + # The following was signed into law on 2005-08-08. + # + # H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. + # (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15 + # U.S.C. 260a(a)) is amended-- + # (1) by striking `first Sunday of April' and inserting `second + # Sunday of March'; and + # (2) by striking `last Sunday of October' and inserting `first + # Sunday of November'. + # (b) Effective Date- Subsection (a) shall take effect 1 year after the + # date of enactment of this Act or March 1, 2007, whichever is later. + # (c) Report to Congress- Not later than 9 months after the effective + # date stated in subsection (b), the Secretary shall report to Congress + # on the impact of this section on energy consumption in the United + # States. + # (d) Right to Revert- Congress retains the right to revert the + # Daylight Saving Time back to the 2005 time schedules once the + # Department study is complete.    -  + # US eastern time, represented by New York +    # Connecticut, Delaware, District of Columbia, most of Florida, - # Georgia, far southeastern Indiana, eastern Kentucky, Maine, - # Maryland, Massachusetts, New Hampshire, New Jersey, New York, North - # Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, eastern - # Tennessee, Vermont, Virginia, West Virginia + # Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky + # (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, + # New Hampshire, New Jersey, New York, North Carolina, Ohio, + # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, + # Vermont, Virginia, West Virginia    -  + # From Dave Cantor (2004-11-02): + # Early this summer I had the occasion to visit the Mount Washington + # Observatory weather station atop (of course!) Mount Washington [, NH].... + # One of the staff members said that the station was on Eastern Standard Time + # and didn't change their clocks for Daylight Saving ... so that their + # reports will always have times which are 5 hours behind UTC. +  + # From Paul Eggert (2005-08-26): + # According to today's Huntsville Times + # <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1> + # a few towns on Alabama's "eastern border with Georgia, such as Phenix City + # in Russell County, Lanett in Chambers County and some towns in Lee County, + # set their watches and clocks on Eastern time." It quotes H.H. "Bubba" + # Roberts, city administrator in Phenix City. as saying "We are in the Central + # time zone, but we do go by the Eastern time zone because so many people work + # in Columbus." +    # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER   Rule NYC 1920 only - Mar lastSun 2:00 1:00 D   Rule NYC 1920 only - Oct lastSun 2:00 0 S
190:   Rule NYC 1921 1954 - Sep lastSun 2:00 0 S   Rule NYC 1955 1966 - Oct lastSun 2:00 0 S   # Zone NAME GMTOFF RULES FORMAT [UNTIL] - Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:00 + Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58    -5:00 US E%sT 1920    -5:00 NYC E%sT 1942    -5:00 US E%sT 1946    -5:00 NYC E%sT 1967    -5:00 US E%sT    - # US Central time, represented by Chicago + # US central time, represented by Chicago    - # Alabama, Arkansas, Florida panhandle, Illinois, western Indiana - # corners, Iowa, most of Kansas, western Kentucky, Louisiana, - # Minnesota, Mississippi, Missouri, eastern Nebraska, eastern North - # Dakota, Oklahoma, eastern South Dakota, western Tennessee, most of - # Texas, Wisconsin + # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, + # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and + # Washington counties), Illinois, western Indiana + # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, + # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western + # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern + # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, + # western Tennessee, most of Texas, Wisconsin    -  + # From Larry M. Smith (2006-04-26) re Wisconsin: + # http://www.legis.state.wi.us/statutes/Stat0175.pdf ... + # is currently enforced at the 01:00 time of change. Because the local + # "bar time" in the state corresponds to 02:00, a number of citations + # are issued for the "sale of class 'B' alcohol after prohibited + # hours" within the deviated hour of this change every year.... +    # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER   Rule Chicago 1920 only - Jun 13 2:00 1:00 D   Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S
213:   Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S   Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S   # Zone NAME GMTOFF RULES FORMAT [UNTIL] - Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:00 + Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24    -6:00 US C%sT 1920    -6:00 Chicago C%sT 1936 Mar 1 2:00    -5:00 - EST 1936 Nov 15 2:00
221:    -6:00 US C%sT 1946    -6:00 Chicago C%sT 1967    -6:00 US C%sT + # Oliver County, ND switched from mountain to central time on 1992-10-25. + Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 +  -7:00 US M%sT 1992 Oct 25 02:00 +  -6:00 US C%sT + # Morton County, ND, switched from mountain to central time on + # 2003-10-26, except for the area around Mandan which was already central time. + # See <http://dmses.dot.gov/docimages/p63/135818.pdf>. + # Officially this switch also included part of Sioux County, and + # Jones, Mellette, and Todd Counties in South Dakota; + # but in practice these other counties were already observing central time. + # See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. + Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 +  -7:00 US M%sT 2003 Oct 26 02:00 +  -6:00 US C%sT    - # US Mountain time, represented by Denver + # US mountain time, represented by Denver   # - # Colorado, southern Idaho, far western Kansas, Montana, western - # Nebraska, New Mexico, southwestern North Dakota, far eastern Oregon, - # western South Dakota, far western Texas, Utah, Wyoming + # Colorado, far western Kansas, Montana, western + # Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), + # New Mexico, southwestern North Dakota, far eastern Oregon, + # western South Dakota, far western Texas (El Paso County, Hudspeth County, + # and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming   #   # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER   Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D
235:   Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D   Rule Denver 1965 1966 - Oct lastSun 2:00 0 S   # Zone NAME GMTOFF RULES FORMAT [UNTIL] - Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00 + Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04    -7:00 US M%sT 1920    -7:00 Denver M%sT 1942    -7:00 US M%sT 1946
244:      # US Pacific time, represented by Los Angeles   # - # California, northern Idaho, Nevada, most of Oregon, and Washington + # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, + # Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties), + # most of Nevada, most of Oregon, and Washington   #   # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER   Rule CA 1948 only - Mar 14 2:00 1:00 D
253:   Rule CA 1950 1961 - Sep lastSun 2:00 0 S   Rule CA 1962 1966 - Oct lastSun 2:00 0 S   # Zone NAME GMTOFF RULES FORMAT [UNTIL] - Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:00 + Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02    -8:00 US P%sT 1946    -8:00 CA P%sT 1967    -8:00 US P%sT
261:   # Alaska   # AK%sT is the modern abbreviation for -9:00 per USNO.   # - # From Paul Eggert (1995-12-19): + # From Paul Eggert (2001-05-30):   # Howse writes that Alaska switched from the Julian to the Gregorian calendar,   # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. - # This was on 1867-10-18. We omit this transition, since we can't represent - # changes from Julian to Gregorian. + # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, + # also a Friday. Include only the time zone part of this transition, + # ignoring the switch from Julian to Gregorian, since we can't represent + # the Julian calendar.   # -  + # As far as we know, none of the exact locations mentioned below were + # permanently inhabited in 1867 by anyone using either calendar. + # (Yakutat was colonized by the Russians in 1799, but the settlement + # was destroyed in 1805 by a Yakutat-kon war party.) However, there + # were nearby inhabitants in some cases and for our purposes perhaps + # it's best to simply use the official transition. + #   # Zone NAME GMTOFF RULES FORMAT [UNTIL] - Zone America/Juneau -8:57:41 - LMT 1900 Aug 20 12:00 + Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 +  -8:57:41 - LMT 1900 Aug 20 12:00    -8:00 - PST 1942    -8:00 US P%sT 1946    -8:00 - PST 1969    -8:00 US P%sT 1983 Oct 30 2:00 -  +  -9:00 US Y%sT 1983 Nov 30    -9:00 US AK%sT - Zone America/Yakutat -9:18:55 - LMT 1900 Aug 20 12:00 + Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 +  -9:18:55 - LMT 1900 Aug 20 12:00    -9:00 - YST 1942    -9:00 US Y%sT 1946    -9:00 - YST 1969 -  -9:00 US Y%sT 1983 Oct 30 2:00 +  -9:00 US Y%sT 1983 Nov 30    -9:00 US AK%sT - Zone America/Anchorage -9:59:36 - LMT 1900 Aug 20 12:00 + Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 +  -9:59:36 - LMT 1900 Aug 20 12:00    -10:00 - CAT 1942 -  -10:00 US CAT/CAWT 1946 +  -10:00 US CAT/CAWT 1945 Aug 14 23:00u +  -10:00 US CAT/CAPT 1946 # Peace    -10:00 - CAT 1967 Apr    -10:00 - AHST 1969    -10:00 US AH%sT 1983 Oct 30 2:00 -  +  -9:00 US Y%sT 1983 Nov 30    -9:00 US AK%sT - Zone America/Nome -11:01:38 - LMT 1900 Aug 20 12:00 + Zone America/Nome 12:58:21 - LMT 1867 Oct 18 +  -11:01:38 - LMT 1900 Aug 20 12:00    -11:00 - NST 1942    -11:00 US N%sT 1946    -11:00 - NST 1967 Apr    -11:00 - BST 1969    -11:00 US B%sT 1983 Oct 30 2:00 -  +  -9:00 US Y%sT 1983 Nov 30    -9:00 US AK%sT - Zone America/Adak -11:46:38 - LMT 1900 Aug 20 12:00 + Zone America/Adak 12:13:21 - LMT 1867 Oct 18 +  -11:46:38 - LMT 1900 Aug 20 12:00    -11:00 - NST 1942    -11:00 US N%sT 1946    -11:00 - NST 1967 Apr    -11:00 - BST 1969    -11:00 US B%sT 1983 Oct 30 2:00 -  +  -10:00 US AH%sT 1983 Nov 30    -10:00 US HA%sT -  + # The following switches don't quite make our 1970 cutoff. + #   # Shanks writes that part of southwest Alaska (e.g. Aniak)   # switched from -11:00 to -10:00 on 1968-09-22 at 02:00,   # and another part (e.g. Akiak) made the same switch five weeks later. - # These switches don't quite make our 1970 cutoff. + # + # From David Flater (2004-11-09): + # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska + # Historic Preservation Commission, provided this information, which + # suggests that Unalaska deviated from statutory time from early 1967 + # possibly until 1983: + # + # Minutes of the Unalaska City Council Meeting, January 10, 1967: + # "Except for St. Paul and Akutan, Unalaska is the only important + # location not on Alaska Standard Time. The following resolution was + # made by William Robinson and seconded by Henry Swanson: Be it + # resolved that the City of Unalaska hereby goes to Alaska Standard + # Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, + # January 14, Alaska Standard Time.) This resolution was passed with + # three votes for and one against."      # Hawaii   #
326:   # Now we turn to US areas that have diverged from the consensus since 1970.      # Arizona mostly uses MST. - Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 12:00 +  + # From Paul Eggert (2002-10-20): + # + # The information in the rest of this paragraph is derived from the + # <a href="http://www.dlapr.lib.az.us/links/daylight.htm"> + # Daylight Saving Time web page (2002-01-23)</a> maintained by the + # Arizona State Library, Archives and Public Records. + # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard + # time, but by federal law railroads, airlines, bus lines, military + # personnel, and some engaged in interstate commerce continued to + # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix + # Gazette says that was the date the law changed, and that 04-01 was + # the date the state's clocks would change. In 1945 the State of + # Arizona used standard time all year, again with exceptions only as + # mandated by federal law. Arizona observed DST in 1967, but Arizona + # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. + # + # Shanks says the 1944 experiment came to an end on 1944-03-17. + # Go with the Arizona State Library instead. +  + Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42    -7:00 US M%sT 1944 Jan 1 00:01 -  -7:00 - MST 1944 Mar 17 00:01 +  -7:00 - MST 1944 Apr 1 00:01    -7:00 US M%sT 1944 Oct 1 00:01    -7:00 - MST 1967 -  -7:00 US M%sT 1968 +  -7:00 US M%sT 1968 Mar 21    -7:00 - MST   # From Arthur David Olson (1988-02-13):   # A writer from the Inter Tribal Council of Arizona, Inc., - # notes in private correspondence dated 12/28/87 that "Presently, only the + # notes in private correspondence dated 1987-12-28 that "Presently, only the   # Navajo Nation participates in the Daylight Saving Time policy, due to its   # large size and location in three states." (The "only" means that other   # tribal nations don't use DST.)      Link America/Denver America/Shiprock    - # Southern Idaho and eastern Oregon switched four weeks late in 1974. + # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, + # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, + # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, + # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, + # Teton, Twin Falls, Valley, Washington counties) and eastern Oregon + # switched four weeks late in 1974. + #   # Zone NAME GMTOFF RULES FORMAT [UNTIL] - Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:00 + Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11    -8:00 US P%sT 1923 May 13 2:00    -7:00 US M%sT 1974    -7:00 - MST 1974 Feb 3 2:00
355:   # For a map of Indiana's time zone regions, see:   # <a href="http://www.mccsc.edu/time.html">   # What time is it in Indiana? - # </a> (1999-04-06) + # </a> (2006-03-01)   # - # From Paul Eggert (1995-12-19): - # Indiana generally observes either EST all year, or CST/CDT, - # but areas near Cincinnati and Louisville use those cities' timekeeping - # and in 1969 and 1970 the whole state observed daylight time; - # and there are other exceptions as noted below. - # Shanks partitions Indiana into 345 regions, each with its own time history, - # and writes ``Even newspaper reports present contradictory information.'' - # Fortunately, most of the complexity occurred before our cutoff date of 1970. + # From Paul Eggert (2006-03-22): + # Since 1970, most of Indiana has been like America/Indiana/Indianapolis, + # with the following exceptions:   # - # Since 1970, EST-only Indiana has been like America/Indianapolis, - # with exceptions noted below for Crawford, Starke, and Switzerland counties. - # The parts of Indiana not listed below have been like America/Chicago, - # America/Louisville, or America/New_York. + # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, + # Vandenburgh, and Warrick counties have been like America/Chicago.   # -  + # - Dearborn and Ohio counties have been like America/New_York. + # + # - Clark, Floyd, and Harrison counties have been like + # America/Kentucky/Louisville. + # + # - Daviess, Dubois, Knox, Martin, Perry, and Pulaski counties + # have been like America/Indiana/Vincennes. + # + # - Crawford, Pike, Starke, and Switzerland counties have their own time zone + # histories as noted below. + # + # Shanks partitioned Indiana into 345 regions, each with its own time history, + # and wrote ``Even newspaper reports present contradictory information.'' + # Those Hoosiers! Such a flighty and changeable people! + # Fortunately, most of the complexity occurred before our cutoff date of 1970. + #   # Other than Indianapolis, the Indiana place names are so nondescript   # that they would be ambiguous if we left them at the `America' level.   # So we reluctantly put them all in a subdirectory `America/Indiana'. - # - # Most of EST-only Indiana last observed DST in 1970. +  + # From Paul Eggert (2005-08-16): + # http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. +  + # From Nathan Stratton Treadway (2006-03-30): + # http://www.dot.gov/affairs/dot0406.htm [3705 B] + # From Deborah Goldsmith (2006-01-18): + # http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB] + # From Paul Eggert (2006-01-20): + # It says "DOT is relocating the time zone boundary in Indiana to move Starke, + # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the + # Eastern Time Zone to the Central Time Zone.... The effective date of + # this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the + # changeover date from standard time to Daylight Saving Time." + # Strictly speaking, this means the affected counties will change their + # clocks twice that night, but this obviously is in error. The intent + # is that 01:59:59 EST be followed by 02:00:00 CDT. +    # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER   Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D   Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S   Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D   # Zone NAME GMTOFF RULES FORMAT [UNTIL] - Zone America/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:00 + Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22    -6:00 US C%sT 1920    -6:00 Indianapolis C%sT 1942    -6:00 US C%sT 1946
390:    -6:00 - CST 1958 Apr 27 2:00    -5:00 - EST 1969    -5:00 US E%sT 1971 -  -5:00 - EST - Link America/Indianapolis America/Indiana/Indianapolis +  -5:00 - EST 2006 +  -5:00 US E%sT   # - # Part of Crawford County, Indiana, last observed DST in 1975, - # and left its clocks alone in 1974. + # Eastern Crawford County, Indiana, left its clocks alone in 1974, + # as well as from 1976 through 2005.   # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER   Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D   Rule Marengo 1951 only - Sep lastSun 2:00 0 S   Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D   Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S   # Zone NAME GMTOFF RULES FORMAT [UNTIL] - Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:00 + Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37    -6:00 US C%sT 1951    -6:00 Marengo C%sT 1961 Apr 30 2:00    -5:00 - EST 1969    -5:00 US E%sT 1974 Jan 6 2:00    -6:00 1:00 CDT 1974 Oct 27 2:00    -5:00 US E%sT 1976 -  -5:00 - EST +  -5:00 - EST 2006 +  -5:00 US E%sT   # - # Starke County, Indiana + # Daviess, Dubois, Knox, Martin, Perry, and Pulaski Counties, Indiana, + # switched from eastern to central time in April 2006. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER + Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D + Rule Vincennes 1946 only - Sep lastSun 2:00 0 S + Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D + Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S + Rule Vincennes 1955 only - May 1 0:00 1:00 D + Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D + Rule Vincennes 1960 only - Oct lastSun 2:00 0 S + Rule Vincennes 1961 only - Sep lastSun 2:00 0 S + Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S + # Zone NAME GMTOFF RULES FORMAT [UNTIL] + Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 +  -6:00 US C%sT 1946 +  -6:00 Vincennes C%sT 1964 Apr 26 2:00 +  -5:00 - EST 1969 +  -5:00 US E%sT 1971 +  -5:00 - EST 2006 Apr 2 2:00 +  -6:00 US C%sT + # + # Pike County, Indiana moved from central to eastern time in 1977, + # then switched back in 2006. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER + Rule Pike 1955 only - May 1 0:00 1:00 D + Rule Pike 1955 1960 - Sep lastSun 2:00 0 S + Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D + Rule Pike 1961 1964 - Oct lastSun 2:00 0 S + # Zone NAME GMTOFF RULES FORMAT [UNTIL] + Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 +  -6:00 US C%sT 1955 +  -6:00 Pike C%sT 1965 Apr 25 2:00 +  -5:00 - EST 1966 Oct 30 2:00 +  -6:00 US C%sT 1977 Oct 30 2:00 +  -5:00 - EST 2006 Apr 2 2:00 +  -6:00 US C%sT + # + # Starke County, Indiana moved from central to eastern time in 1991, + # then switched back in 2006.   # From Arthur David Olson (1991-10-28):   # An article on page A3 of the Sunday, 1991-10-27 Washington Post   # notes that Starke County switched from Central time to Eastern time as of
422:   Rule Starke 1957 1958 - Sep lastSun 2:00 0 S   Rule Starke 1959 1961 - Oct lastSun 2:00 0 S   # Zone NAME GMTOFF RULES FORMAT [UNTIL] - Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:00 + Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30    -6:00 US C%sT 1947    -6:00 Starke C%sT 1962 Apr 29 2:00    -5:00 - EST 1963 Oct 27 2:00    -6:00 US C%sT 1991 Oct 27 2:00 -  -5:00 - EST +  -5:00 - EST 2006 Apr 2 2:00 +  -6:00 US C%sT   # - # Switzerland County, Indiana, last observed DST in 1972. + # Switzerland County, Indiana, did not observe DST from 1973 through 2005.   # Zone NAME GMTOFF RULES FORMAT [UNTIL] - Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:00 + Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44    -6:00 US C%sT 1954 Apr 25 2:00    -5:00 - EST 1969    -5:00 US E%sT 1973 -  -5:00 - EST +  -5:00 - EST 2006 +  -5:00 US E%sT      # Part of Kentucky left its clocks alone in 1974. - # This also includes a part of Indiana immediately adjacent to Louisville. + # This also includes Clark, Floyd, and Harrison counties in Indiana.   # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER   Rule Louisville 1921 only - May 1 2:00 1:00 D   Rule Louisville 1921 only - Sep 1 2:00 0 S
448:   Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S   Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S   # Zone NAME GMTOFF RULES FORMAT [UNTIL] - Zone America/Louisville -5:43:02 - LMT 1883 Nov 18 12:00 + Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58    -6:00 US C%sT 1921    -6:00 Louisville C%sT 1942    -6:00 US C%sT 1946
457:    -5:00 US E%sT 1974 Jan 6 2:00    -6:00 1:00 CDT 1974 Oct 27 2:00    -5:00 US E%sT - Link America/Louisville America/Kentucky/Louisville +    # - # Wayne, Clinton, and Russell Counties, Kentucky + # Wayne County, Kentucky   #   # From   # <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml">
478:   # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern   # (-0500) time. They won't "fall back" this year. See Sara Shipley,   # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). - Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:00 + # + # From Paul Eggert (2001-07-16): + # The final rule was published in the + # <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22"> + # Federal Register 65, 160 (2000-08-17), page 50154-50158. + # </a> + # + Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36    -6:00 US C%sT 1946    -6:00 - CST 1968    -6:00 US C%sT 2000 Oct 29 2:00
493:   # Oliver County, ND (from MST to CST) ... 1992-10   # West Wendover, NV (from PST TO MST) ... 1999-10   # Wayne County, KY (from CST to EST) ... 2000-10 - # There is another change in the offing; Mercer County, ND is looking - # to change from MT to CT. It is possible that two other ND counties - # (Sioux and Morton) will look to change also. If made, the earliest - # a change would be effective is October 2001. +    # - # From Paul Eggert (2000-10-02): - # FIXME: I haven't yet had time to incorporate all the above changes. + # From Paul Eggert (2001-07-17): + # We don't know where the line used to be within Kearny County, KS, + # so omit that change for now. + # See America/Indiana/Knox for the Starke County, IN change. + # See America/North_Dakota/Center for the Oliver County, ND change. + # West Wendover, NV officially switched from Pacific to mountain time on + # 1999-10-31. See the + # <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15"> + # Federal Register 64, 203 (1999-10-21), page 56705-56707. + # </a> + # However, the Federal Register says that West Wendover already operated + # on mountain time, and the rule merely made this official; + # hence a separate tz entry is not needed.      # Michigan   #
521:   #   # This story is too entertaining to be false, so go with Howse over Shanks.   # + # From Paul Eggert (2001-03-06): + # Garland (1927) writes ``Cleveland and Detroit advanced their clocks + # one hour in 1914.'' This change is not in Shanks. We have no more + # info, so omit this for now. + #   # Most of Michigan observed DST from 1973 on, but was a bit late in 1975.   # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER   Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D
537:    -5:00 - EST 1975 Apr 27 2:00    -5:00 US E%sT   # - # The Michigan border with Wisconsin switched from EST to CST/CDT in 1973. + # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, + # switched from EST to CST/CDT in 1973.   # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER   Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D   Rule Menominee 1946 only - Sep lastSun 2:00 0 S
551:    -6:00 US C%sT      # Navassa + # administered by the US Fish and Wildlife Service   # claimed by US under the provisions of the 1856 Guano Islands Act   # also claimed by Haiti   # occupied 1857/1900 by the Navassa Phosphate Co - # US lighthouse 1917/1997-01 + # US lighthouse 1917/1996-09   # currently uninhabited   # see Mark Fineman, ``An Isle Rich in Guano and Discord'',   # _Los Angeles Times_ (1998-11-10), A1, A10; it cites   # Jimmy Skaggs, _The Great Guano Rush_ (1994).    - # Old names, for S5 users -  - # Link LINK-FROM LINK-TO - Link America/New_York EST5EDT - Link America/Chicago CST6CDT - Link America/Denver MST7MDT - Link America/Los_Angeles PST8PDT - Link America/Indianapolis EST - Link America/Phoenix MST - Link Pacific/Honolulu HST -  +    ################################################################################       - # From Paul Eggert <eggert@twinsun.com> (1999-10-29): - # A good source for time zone historical data outside the US is - # Thomas G. Shanks, The International Atlas (5th edition), - # San Diego: ACS Publications, Inc. (1999). + # From Paul Eggert (2006-03-22): + # A good source for time zone historical data outside the U.S. is + # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), + # San Diego: ACS Publications, Inc. (2003).   # - # Gwillim Law <Gwil_Law@bridge-point.com> writes that a good source + # Gwillim Law writes that a good source   # for recent time zone data is the International Air Transport   # Association's Standard Schedules Information Manual (IATA SSIM),   # published semiannually. Law sent in several helpful summaries   # of the IATA's data after 1990.   # - # Except where otherwise noted, Shanks is the source for entries through 1990, - # and IATA SSIM is the source for entries after 1990. + # Except where otherwise noted, Shanks & Pottenger is the source for + # entries through 1990, and IATA SSIM is the source for entries afterwards.   # - # Another source occasionally used is Edward W. Whitman, World Time Differences, - # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which - # I found in the UCLA library. + # Other sources occasionally used include:   # -  + # Edward W. Whitman, World Time Differences, + # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), + # which I found in the UCLA library. + # + # <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf"> + # William Willett, The Waste of Daylight, 19th edition + # </a> (1914-03) + #   # See the `europe' file for Greenland.      # Canada    - # From Alain LaBont<e'> <ALB@immedia.ca> (1994-11-14): + # From Alain LaBont<e'> (1994-11-14):   # I post here the time zone abbreviations standardized in Canada   # for both English and French in the CAN/CSA-Z234.4-89 standard....   #
625:   # T: de Terre-Neuve   # Y: du Yukon Yukon   # - # From Paul Eggert <eggert@twinsun.com> (1994-11-22): + # From Paul Eggert (1994-11-22):   # Alas, this sort of thing must be handled by localization software.    - # Unless otherwise specified, the data for Canada are all from Shanks. + # Unless otherwise specified, the data for Canada are all from Shanks + # & Pottenger.    - # From Paul Eggert (2000-10-02): + # From Chris Walton (2006-04-01): + # The British Columbia government announced yesterday that it will + # adjust daylight savings next year to align with changes in the + # U.S. and the rest of Canada.... + # http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm +  + # From Chris Walton (2006-04-25): + # Daylight saving time will be extended by four weeks starting in 2007.... + # Here is a news release which was issued today by the Nova Scotia government: + # http://www.gov.ns.ca/news/details.asp?id=20060425004 +  + # From Chris Walton (2006-06-26): + # [For New Brunswick] the new legislation dictates that the time change is to + # be done at 02:00 instead of 00:01. + # http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf + # ... + # Manitoba has traditionally changed the clock every fall at 03:00. + # As of 2006, the transition is to take place one hour earlier at 02:00. + # http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php + # ... + # [Alberta, Ontario, Quebec] will follow US rules. + # http://www.qp.gov.ab.ca/documents/Acts/2006CH03_UNPR.cfm?frm_isbn=0779744934 + # http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm + # http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm + # ... + # P.E.I. will follow US rules. The new legislation is not law yet. + # It passed first reading on April 20.... + # http://www.assembly.pe.ca/bills/pdf_first/62/3/bill-101.pdf + # ... + # Province of Newfoundland and Labrador.... The change is being considered. + # http://www.releases.gov.nl.ca/releases/2006/mpa/0331n01.htm + # ... + # N.W.T. will follow US rules. Whoever maintains the government web site + # does not seem to believe in bookmarks. To see the news release, click the + # following link and search for "Daylight Savings Time Change". Press the + # "Daylight Savings Time Change" link; it will fire off a popup using + # JavaScript. + # http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive +  +  +  + # From Paul Eggert (2006-04-25):   # H. David Matthews and Mary Vincent's map - # <a href="http://www.canadiangeographic.ca/SO98/geomap.htm"> + # <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp">   # "It's about TIME", _Canadian Geographic_ (September-October 1998)   # </a> contains detailed boundaries for regions observing nonstandard   # time and daylight saving time arrangements in Canada circa 1998.   # - # INMS, the Institute for National Measurement Standards in Ottawa, has - # <a href="http://www.nrc.ca/inms/time/tze.html"> + # INMS, the Institute for National Measurement Standards in Ottawa, has <a + # href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php">   # information about standard and daylight saving time zones in Canada.   # </a> (updated periodically).   # Its unofficial information is often taken from Matthews and Vincent.    -  + # From Paul Eggert (2006-06-27): + # For now, assume all of DST-observing Canada will fall into line with the + # new US DST rules, +    # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S   Rule Canada 1918 only - Apr 14 2:00 1:00 D   Rule Canada 1918 only - Oct 31 2:00 0 S - Rule Canada 1942 only - Feb 9 2:00 1:00 D + Rule Canada 1942 only - Feb 9 2:00 1:00 W # War + Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace   Rule Canada 1945 only - Sep 30 2:00 0 S   Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D - Rule Canada 1974 max - Oct lastSun 2:00 0 S - Rule Canada 1987 max - Apr Sun>=1 2:00 1:00 D + Rule Canada 1974 2006 - Oct lastSun 2:00 0 S + Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D + Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D + Rule Canada 2007 max - Nov Sun>=1 2:00 0 S       - # Newfoundland (and far southeast Labrador) + # Newfoundland and Labrador      # From Paul Eggert (2000-10-02):   # Matthews and Vincent (1998) write that Labrador should use NST/NDT,
662:   # but excluding, say, Black Tickle.      # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S - Rule StJohns 1917 1918 - Apr Sun>=8 2:00 1:00 D + Rule StJohns 1917 only - Apr 8 2:00 1:00 D   Rule StJohns 1917 only - Sep 17 2:00 0 S - Rule StJohns 1918 only - Oct 31 2:00 0 S - # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks. + # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger.   Rule StJohns 1919 only - May 5 23:00 1:00 D   Rule StJohns 1919 only - Aug 12 23:00 0 S - # For 1931-1935 Whitman gives Apr same date; go with Shanks. + # For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger.   Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D   Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S - # For 1936-1941 Shanks gives May Mon>=9 and Oct Mon>=2; go with Whitman. - Rule StJohns 1936 1941 - May Sun>=8 0:00 1:00 D - Rule StJohns 1936 1941 - Oct Sun>=1 0:00 0 S - # Shanks gives 1942 May 11 - 1945 Sep 30; go with Whitman. - Rule StJohns 1942 only - Mar 1 0:00 1:00 D - Rule StJohns 1942 only - Dec 31 0:00 0 S - Rule StJohns 1943 only - May 30 0:00 1:00 D - Rule StJohns 1943 only - Sep 5 0:00 0 S - Rule StJohns 1944 only - Jul 10 0:00 1:00 D - Rule StJohns 1944 only - Sep 2 0:00 0 S - Rule StJohns 1945 only - Jan 1 0:00 1:00 D - Rule StJohns 1945 only - Oct 7 2:00 0 S + # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & + # Pottenger. + Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D + Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S + # Whitman gives the following transitions: + # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 + # but go with Shanks & Pottenger and assume they used Canadian rules.   # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives - # Apr 30 - Sep 24; go with Shanks. + # Apr 30 - Sep 24; go with Shanks & Pottenger.   Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D   Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S   Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D
694:   # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches   # at 00:01 local time. For now, assume it started in 1987.   Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D - Rule StJohns 1987 max - Oct lastSun 0:01 0 S + Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S   Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD - Rule StJohns 1989 max - Apr Sun>=1 0:01 1:00 D + Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D + Rule StJohns 2007 max - Mar Sun>=8 0:01 1:00 D + Rule StJohns 2007 max - Nov Sun>=1 0:01 0 S + #   # St John's has an apostrophe, but Posix file names can't have apostrophes.   # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/St_Johns -3:30:52 - LMT 1884 -  +  -3:30:52 StJohns N%sT 1918 +  -3:30:52 Canada N%sT 1919    -3:30:52 StJohns N%sT 1935 Mar 30 -  +  -3:30 StJohns N%sT 1942 May 11 +  -3:30 Canada N%sT 1946    -3:30 StJohns N%sT    -  +    # most of east Labrador      # The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'.   # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay -  -3:30:52 StJohns NST 1919 +  -3:30:52 - NST 1918 +  -3:30:52 Canada N%sT 1919    -3:30:52 - NST 1935 Mar 30    -3:30 - NST 1936 -  +  -3:30 StJohns N%sT 1942 May 11 +  -3:30 Canada N%sT 1946    -3:30 StJohns N%sT 1966 Mar 15 2:00    -4:00 StJohns A%sT       - # west Labrador, New Brunswick, Nova Scotia, Prince Edward I + # west Labrador, Nova Scotia, Prince Edward I    - # From Paul Eggert (1996-06-12): - # Shanks writes that since 1970 most of this region has been like Halifax. - # Many locales did not observe peacetime DST until 1972; + # From Paul Eggert (2006-03-22): + # Shanks & Pottenger write that since 1970 most of this region has been like + # Halifax. Many locales did not observe peacetime DST until 1972;   # Glace Bay, NS is the largest that we know of. - # Shanks also writes that Liverpool, NS was the only town in Canada to observe - # DST in 1971 but not 1970; for now we'll assume this is a typo. + # Shanks & Pottenger also write that Liverpool, NS was the only town + # in Canada to observe DST in 1971 but not 1970; for now we'll assume + # this is a typo.    - # From Paul Eggert (2000-10-02): - # INMS (2000-09-12) says that, since 1988 at least, New Brunswick switches - # at 00:01 local time. FIXME: verify and create a new Zone for this. -  -  +    # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S - Rule Halifax 1916 only - Apr 1 0:00 1:00 D - Rule Halifax 1916 only - Oct 1 0:00 0 S - Rule Halifax 1918 only - Apr 14 2:00 1:00 D - Rule Halifax 1918 only - Oct 31 2:00 0 S - Rule Halifax 1920 only - May 9 0:00 1:00 D - Rule Halifax 1920 only - Aug 29 0:00 0 S - Rule Halifax 1921 only - May 6 0:00 1:00 D - Rule Halifax 1921 1922 - Sep 5 0:00 0 S - Rule Halifax 1922 only - Apr 30 0:00 1:00 D - Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D - Rule Halifax 1923 only - Sep 4 0:00 0 S - Rule Halifax 1924 only - Sep 15 0:00 0 S - Rule Halifax 1925 only - Sep 28 0:00 0 S - Rule Halifax 1926 only - May 16 0:00 1:00 D - Rule Halifax 1926 only - Sep 13 0:00 0 S - Rule Halifax 1927 only - May 1 0:00 1:00 D - Rule Halifax 1927 only - Sep 26 0:00 0 S - Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D - Rule Halifax 1928 only - Sep 9 0:00 0 S - Rule Halifax 1929 only - Sep 3 0:00 0 S - Rule Halifax 1930 only - Sep 15 0:00 0 S - Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S - Rule Halifax 1933 only - Apr 30 0:00 1:00 D - Rule Halifax 1933 only - Oct 2 0:00 0 S - Rule Halifax 1934 only - May 20 0:00 1:00 D - Rule Halifax 1934 only - Sep 16 0:00 0 S - Rule Halifax 1935 only - Jun 2 0:00 1:00 D - Rule Halifax 1935 only - Sep 30 0:00 0 S - Rule Halifax 1936 only - Jun 1 0:00 1:00 D - Rule Halifax 1936 only - Sep 14 0:00 0 S - Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D - Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S - Rule Halifax 1939 only - May 28 0:00 1:00 D - Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D - Rule Halifax 1942 only - Feb 9 2:00 1:00 D - Rule Halifax 1945 1959 - Sep lastSun 2:00 0 S - Rule Halifax 1946 1959 - Apr lastSun 2:00 1:00 D - Rule Halifax 1962 1986 - Apr lastSun 2:00 1:00 D - Rule Halifax 1962 max - Oct lastSun 2:00 0 S - Rule Halifax 1987 max - Apr Sun>=1 2:00 1:00 D + Rule Halifax 1916 only - Apr 1 0:00 1:00 D + Rule Halifax 1916 only - Oct 1 0:00 0 S + Rule Halifax 1920 only - May 9 0:00 1:00 D + Rule Halifax 1920 only - Aug 29 0:00 0 S + Rule Halifax 1921 only - May 6 0:00 1:00 D + Rule Halifax 1921 1922 - Sep 5 0:00 0 S + Rule Halifax 1922 only - Apr 30 0:00 1:00 D + Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D + Rule Halifax 1923 only - Sep 4 0:00 0 S + Rule Halifax 1924 only - Sep 15 0:00 0 S + Rule Halifax 1925 only - Sep 28 0:00 0 S + Rule Halifax 1926 only - May 16 0:00 1:00 D + Rule Halifax 1926 only - Sep 13 0:00 0 S + Rule Halifax 1927 only - May 1 0:00 1:00 D + Rule Halifax 1927 only - Sep 26 0:00 0 S + Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D + Rule Halifax 1928 only - Sep 9 0:00 0 S + Rule Halifax 1929 only - Sep 3 0:00 0 S + Rule Halifax 1930 only - Sep 15 0:00 0 S + Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S + Rule Halifax 1932 only - May 1 0:00 1:00 D + Rule Halifax 1933 only - Apr 30 0:00 1:00 D + Rule Halifax 1933 only - Oct 2 0:00 0 S + Rule Halifax 1934 only - May 20 0:00 1:00 D + Rule Halifax 1934 only - Sep 16 0:00 0 S + Rule Halifax 1935 only - Jun 2 0:00 1:00 D + Rule Halifax 1935 only - Sep 30 0:00 0 S + Rule Halifax 1936 only - Jun 1 0:00 1:00 D + Rule Halifax 1936 only - Sep 14 0:00 0 S + Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D + Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S + Rule Halifax 1939 only - May 28 0:00 1:00 D + Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D + Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D + Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S + Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D + Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S + Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D + Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S + Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D + Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S   # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 -  -4:00 Halifax A%sT +  -4:00 Halifax A%sT 1918 +  -4:00 Canada A%sT 1919 +  -4:00 Halifax A%sT 1942 Feb 9 2:00s +  -4:00 Canada A%sT 1946 +  -4:00 Halifax A%sT 1974 +  -4:00 Canada A%sT   Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15    -4:00 Canada A%sT 1953    -4:00 Halifax A%sT 1954    -4:00 - AST 1972 -  -4:00 Halifax A%sT +  -4:00 Halifax A%sT 1974 +  -4:00 Canada A%sT    -  + # New Brunswick    - # Ontario, Quebec + # From Paul Eggert (2006-01-20): + # New Brunswick's Time Definition Act + # <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> says they change at 00:01, and + # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it + # clear that this has been the case since at least 1993. + # For now, assume it started in 1993.    - # From Paul Eggert (1996-06-12): - # Shanks writes that since 1970 most of this region has been like Montreal. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S + Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D + Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S + Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D + Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S + Rule Moncton 1939 only - May 27 1:00 1:00 D + Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S + Rule Moncton 1940 only - May 19 1:00 1:00 D + Rule Moncton 1941 only - May 4 1:00 1:00 D + Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D + Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S + Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S + Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D + Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S + # Zone NAME GMTOFF RULES FORMAT [UNTIL] + Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 +  -5:00 - EST 1902 Jun 15 +  -4:00 Canada A%sT 1933 +  -4:00 Moncton A%sT 1942 +  -4:00 Canada A%sT 1946 +  -4:00 Moncton A%sT 1973 +  -4:00 Canada A%sT 1993 +  -4:00 Moncton A%sT 2007 +  -4:00 Canada A%sT +  + # Quebec +  + # From Paul Eggert (2006-07-09): + # Shanks & Pottenger write that since 1970 most of Quebec has been + # like Montreal. +  + # From Paul Eggert (2006-06-27): + # Matthews and Vincent (1998) also write that Quebec east of the -63 + # meridian is supposed to observe AST, but residents as far east as + # Natashquan use EST/EDT, and residents east of Natashquan use AST. + # In "Official time in Quebec" the Quebec department of justice writes in + # http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm + # that "The residents of the Municipality of the + # Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin, + # Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is + # written and use Atlantic standard time all year round. The same applies to + # the residents of the Native facilities along the lower North Shore." + # <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm> + # says this common practice was codified into law as of 2007. + # For lack of better info, guess this practice began around 1970, contra to + # Shanks & Pottenger who have this region observing AST/ADT. +  + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S + Rule Mont 1917 only - Mar 25 2:00 1:00 D + Rule Mont 1917 only - Apr 24 0:00 0 S + Rule Mont 1919 only - Mar 31 2:30 1:00 D + Rule Mont 1919 only - Oct 25 2:30 0 S + Rule Mont 1920 only - May 2 2:30 1:00 D + Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S + Rule Mont 1921 only - May 1 2:00 1:00 D + Rule Mont 1922 only - Apr 30 2:00 1:00 D + Rule Mont 1924 only - May 17 2:00 1:00 D + Rule Mont 1924 1926 - Sep lastSun 2:30 0 S + Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D + # The 1927-to-1937 rules can be expressed more simply as + # Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D + # Rule Mont 1927 1937 - Sep lastSat 24:00 0 S + # The rules below avoid use of 24:00 + # (which pre-1998 versions of zic cannot handle). + Rule Mont 1927 only - May 1 0:00 1:00 D + Rule Mont 1927 1932 - Sep lastSun 0:00 0 S + Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D + Rule Mont 1932 only - May 1 0:00 1:00 D + Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D + Rule Mont 1933 only - Oct 1 0:00 0 S + Rule Mont 1934 1939 - Sep lastSun 0:00 0 S + Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D + Rule Mont 1945 1948 - Sep lastSun 2:00 0 S + Rule Mont 1949 1950 - Oct lastSun 2:00 0 S + Rule Mont 1951 1956 - Sep lastSun 2:00 0 S + Rule Mont 1957 1973 - Oct lastSun 2:00 0 S +  + # Zone NAME GMTOFF RULES FORMAT [UNTIL] + Zone America/Blanc-Sablon -3:48:28 - LMT 1884 +  -4:00 Canada A%sT 1970 +  -4:00 - AST + Zone America/Montreal -4:54:16 - LMT 1884 +  -5:00 Mont E%sT 1918 +  -5:00 Canada E%sT 1919 +  -5:00 Mont E%sT 1942 Feb 9 2:00s +  -5:00 Canada E%sT 1946 +  -5:00 Mont E%sT 1974 +  -5:00 Canada E%sT +  +  + # Ontario +  + # From Paul Eggert (2006-07-09): + # Shanks & Pottenger write that since 1970 most of Ontario has been like + # Toronto.   # Thunder Bay skipped DST in 1973.   # Many smaller locales did not observe peacetime DST until 1974;   # Nipigon (EST) and Rainy River (CST) are the largest that we know of.   # Far west Ontario is like Winnipeg; far east Quebec is like Halifax.    -  + # From Mark Brader (2003-07-26): + # [According to the Toronto Star] Orillia, Ontario, adopted DST + # effective Saturday, 1912-06-22, 22:00; the article mentions that + # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw + # have already done so. In Orillia DST was to run until Saturday, + # 1912-08-31 (no time mentioned), but it was met with considerable + # hostility from certain segments of the public, and was revoked after + # only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but + # presumably that should be -07-06. (1912-06-19, -07-12; also letters + # earlier in June). + # + # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). +    # From Paul Eggert (1997-10-17): - # msb@sq.com writes that an article in the 1997-10-14 Toronto Star + # Mark Brader writes that an article in the 1997-10-14 Toronto Star   # says that Atikokan, Ontario currently does not observe DST,   # but will vote on 11-10 whether to use EST/EDT.   # He also writes that the
801:   # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.   # Officially Atikokan is therefore on CST/CDT, and most likely this report   # concerns a non-official time observed as a matter of local practice. - # For what it's worth, Shanks says that Atikokan has agreed with - # Rainy River ever since standard time was introduced. -  + #   # From Paul Eggert (2000-10-02):   # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and   # New Osnaburgh observe CST all year, that Big Trout Lake observes   # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in   # violation of the official Ontario rules. - # They also write that Quebec east of the -63 meridian is supposed to - # observe AST, but residents as far east as Natashquan use EST/EDT, - # and residents east of Natashquan use AST. - # We probably need Zones for far east Quebec and for Atikokan, - # but we don't know when their practices started. + # + # From Paul Eggert (2006-07-09): + # Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the + # 2005-07-21 Chronicle-Journal, which said: + # + # The clocks in Atikokan stay set on standard time year-round. + # This means they spend about half the time on central time and + # the other half on eastern time. + # + # For the most part, the system works, Mayor Dennis Brown said. + # + # "The majority of businesses in Atikokan deal more with Eastern + # Canada, but there are some that deal with Western Canada," he + # said. "I don't see any changes happening here." + # + # Walton also writes "Supposedly Pickle Lake and Mishkeegogamang + # [New Osnaburgh] follow the same practice."    -  + # From Garry McKinnon (2006-07-14) via Chris Walton: + # I chatted with a member of my board who has an outstanding memory + # and a long history in Atikokan (and in the telecom industry) and he + # can say for certain that Atikokan has been practicing the current + # time keeping since 1952, at least. +  + # From Paul Eggert (2006-07-17): + # Shanks & Pottenger say that Atikokan has agreed with Rainy River + # ever since standard time was introduced, but the information from + # McKinnon sounds more authoritative. For now, assume that Atikokan + # switched to EST immediately after WWII era daylight saving time + # ended. This matches the old (less-populous) America/Coral_Harbour + # entry since our cutoff date of 1970, so we can move + # America/Coral_Harbour to the 'backward' file. +    # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S - Rule Mont 1917 only - Mar 25 2:00 1:00 D - Rule Mont 1917 only - Apr 24 0:00 0 S - Rule Mont 1918 only - Apr 14 2:00 1:00 D - Rule Mont 1918 only - Oct 31 2:00 0 S - Rule Mont 1919 only - Mar 31 2:30 1:00 D - Rule Mont 1919 only - Oct 25 2:30 0 S - Rule Mont 1920 only - May 2 2:30 1:00 D - Rule Mont 1920 only - Oct 3 2:30 0 S - Rule Mont 1921 only - May 1 2:00 1:00 D - Rule Mont 1921 only - Oct 2 2:30 0 S - Rule Mont 1922 only - Apr 30 2:00 1:00 D - Rule Mont 1922 only - Oct 1 2:30 0 S - Rule Mont 1924 only - May 17 2:00 1:00 D - Rule Mont 1924 1926 - Sep lastSun 2:30 0 S - Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D - Rule Mont 1927 only - May 1 0:00 1:00 D - Rule Mont 1927 1932 - Sep Sun>=25 0:00 0 S - Rule Mont 1928 1931 - Apr Sun>=25 0:00 1:00 D - Rule Mont 1932 only - May 1 0:00 1:00 D - Rule Mont 1933 1940 - Apr Sun>=24 0:00 1:00 D - Rule Mont 1933 only - Oct 1 0:00 0 S - Rule Mont 1934 1939 - Sep Sun>=24 0:00 0 S - Rule Mont 1945 1948 - Sep lastSun 2:00 0 S - Rule Mont 1946 1986 - Apr lastSun 2:00 1:00 D - Rule Mont 1949 1950 - Oct lastSun 2:00 0 S - Rule Mont 1951 1956 - Sep lastSun 2:00 0 S - Rule Mont 1957 max - Oct lastSun 2:00 0 S - Rule Mont 1987 max - Apr Sun>=1 2:00 1:00 D + Rule Toronto 1919 only - Mar 30 23:30 1:00 D + Rule Toronto 1919 only - Oct 26 0:00 0 S + Rule Toronto 1920 only - May 2 2:00 1:00 D + Rule Toronto 1920 only - Sep 26 0:00 0 S + Rule Toronto 1921 only - May 15 2:00 1:00 D + Rule Toronto 1921 only - Sep 15 2:00 0 S + Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D + # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" + # was meant. + Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S + Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D + # The 1927-to-1939 rules can be expressed more simply as + # Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S + # Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D + # Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D + # Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S + # The rules below avoid use of Sun>=25 + # (which pre-2004 versions of zic cannot handle). + Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S + Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D + Rule Toronto 1932 only - May 1 2:00 1:00 D + Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D + Rule Toronto 1933 only - Oct 1 2:00 0 S + Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S + Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S + Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D + Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D + Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S + Rule Toronto 1949 only - Nov lastSun 0:00 0 S + Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D + Rule Toronto 1950 only - Nov lastSun 2:00 0 S + Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S + # Shanks & Pottenger say Toronto ended DST a week early in 1971, + # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this + # is wrong, and that he had confirmed it by checking the 1971-10-30 + # Toronto Star, which said that DST was ending 1971-10-31 as usual. + Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S +  + # From Paul Eggert (2003-07-27): + # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and + # Port Arthur, Ontario, the principle of the Bill has been in + # operation for the past three years, and in the City of Moose Jaw, + # Saskatchewan, for one year." +  + # From David Bryan via Tory Tronrud, Director/Curator, + # Thunder Bay Museum (2003-11-12): + # There is some suggestion, however, that, by-law or not, daylight + # savings time was being practiced in Fort William and Port Arthur + # before 1909.... [I]n 1910, the line between the Eastern and Central + # Time Zones was permanently moved about two hundred miles west to + # include the Thunder Bay area.... When Canada adopted daylight + # savings time in 1916, Fort William and Port Arthur, having done so + # already, did not change their clocks.... During the Second World + # War,... [t]he cities agreed to implement DST during the summer + # months for the remainder of the war years. +    # Zone NAME GMTOFF RULES FORMAT [UNTIL] - Zone America/Montreal -4:54:16 - LMT 1884 -  -5:00 Mont E%sT + Zone America/Toronto -5:17:32 - LMT 1895 +  -5:00 Canada E%sT 1919 +  -5:00 Toronto E%sT 1942 Feb 9 2:00s +  -5:00 Canada E%sT 1946 +  -5:00 Toronto E%sT 1974 +  -5:00 Canada E%sT   Zone America/Thunder_Bay -5:57:00 - LMT 1895 -  +  -6:00 - CST 1910 +  -5:00 - EST 1942    -5:00 Canada E%sT 1970    -5:00 Mont E%sT 1973    -5:00 - EST 1974    -5:00 Canada E%sT   Zone America/Nipigon -5:53:04 - LMT 1895 -  +  -5:00 Canada E%sT 1940 Sep 29 +  -5:00 1:00 EDT 1942 Feb 9 2:00s    -5:00 Canada E%sT - Zone America/Rainy_River -6:17:56 - LMT 1895 + Zone America/Rainy_River -6:18:16 - LMT 1895 +  -6:00 Canada C%sT 1940 Sep 29 +  -6:00 1:00 CDT 1942 Feb 9 2:00s    -6:00 Canada C%sT -  + Zone America/Atikokan -6:06:28 - LMT 1895 +  -6:00 Canada C%sT 1940 Sep 29 +  -6:00 1:00 CDT 1942 Feb 9 2:00s +  -6:00 Canada C%sT 1945 Sep 30 2:00 +  -5:00 - EST         # Manitoba    -  + # From Rob Douglas (2006-04-06): + # the old Manitoba Time Act - as amended by Bill 2, assented to + # March 27, 1987 ... said ... + # "between two o'clock Central Standard Time in the morning of + # the first Sunday of April of each year and two o'clock Central + # Standard Time in the morning of the last Sunday of October next + # following, one hour in advance of Central Standard Time."... + # I believe that the English legislation [of the old time act] had = + # been assented to (March 22, 1967).... + # Also, as far as I can tell, there was no order-in-council varying + # the time of Daylight Saving Time for 2005 and so the provisions of + # the 1987 version would apply - the changeover was at 2:00 Central + # Standard Time (i.e. not until 3:00 Central Daylight Time). +  + # From Paul Eggert (2006-04-10): + # Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) + # starting 1966. Since 02:00s is clearly correct for 1967 on, assume + # it was also 02:00s in 1966. +    # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S   Rule Winn 1916 only - Apr 23 0:00 1:00 D   Rule Winn 1916 only - Sep 17 0:00 0 S
867:   Rule Winn 1918 only - Oct 31 2:00 0 S   Rule Winn 1937 only - May 16 2:00 1:00 D   Rule Winn 1937 only - Sep 26 2:00 0 S - Rule Winn 1942 only - Feb 9 2:00 1:00 D + Rule Winn 1942 only - Feb 9 2:00 1:00 W # War + Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace   Rule Winn 1945 only - Sep lastSun 2:00 0 S   Rule Winn 1946 only - May 12 2:00 1:00 D   Rule Winn 1946 only - Oct 13 2:00 0 S
881:   Rule Winn 1960 only - Sep lastSun 2:00 0 S   Rule Winn 1963 only - Apr lastSun 2:00 1:00 D   Rule Winn 1963 only - Sep 22 2:00 0 S - Rule Winn 1966 1986 - Apr lastSun 2:00 1:00 D - Rule Winn 1966 1986 - Oct lastSun 2:00 0 S - Rule Winn 1987 max - Apr Sun>=1 2:00 1:00 D - # From Paul Eggert (2000-10-02): - # INMS (2000-09-12) says that, since 1988 at least, Manitoba switches from - # DST at 03:00 local time. For now, assume it started in 1987. - Rule Winn 1987 max - Oct lastSun 2:00s 0 S + Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D + Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S + Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D   # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 -  -6:00 Winn C%sT +  -6:00 Winn C%sT 2006 +  -6:00 Canada C%sT         # Saskatchewan    - # From Paul Eggert (2000-10-02): - # Shanks writes that since 1970 most of this region has been like Regina. + # From Mark Brader (2003-07-26): + # The first actual adoption of DST in Canada was at the municipal + # level. As the [Toronto] Star put it (1912-06-07), "While people + # elsewhere have long been talking of legislation to save daylight, + # the city of Moose Jaw [Saskatchewan] has acted on its own hook." + # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: + # presumably late evening, as below), and would run until "the end of + # the summer". The discrepancy between municipal time and railroad + # time was noted. +  + # From Paul Eggert (2003-07-27): + # Willett (1914-03) notes that DST "has been in operation ... in the + # City of Moose Jaw, Saskatchewan, for one year." +  + # From Paul Eggert (2006-03-22): + # Shanks & Pottenger say that since 1970 this region has mostly been as Regina.   # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.   # Other western towns (e.g. Lloydminster) are like Edmonton.   # Matthews and Vincent (1998) write that Denare Beach and Creighton   # are like Winnipeg, in violation of Saskatchewan law.    - # From W. Jones <jones@skdad.usask.ca> (1992-11-06): + # From W. Jones (1992-11-06):   # The. . .below is based on information I got from our law library, the   # provincial archives, and the provincial Community Services department.   # A precise history would require digging through newspaper archives, and
928:   # rules any more; all other districts appear to have used CST year round   # since sometime in the 1960s.    + # From Chris Walton (2006-06-26): + # The Saskatchewan time act which was last updated in 1996 is about 30 pages + # long and rather painful to read. + # http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf +    # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S   Rule Regina 1918 only - Apr 14 2:00 1:00 D   Rule Regina 1918 only - Oct 31 2:00 0 S
937:   Rule Regina 1937 only - Oct Sun>=8 0:00 0 S   Rule Regina 1938 only - Oct Sun>=1 0:00 0 S   Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S - Rule Regina 1942 only - Feb 9 2:00 1:00 D + Rule Regina 1942 only - Feb 9 2:00 1:00 W # War + Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace   Rule Regina 1945 only - Sep lastSun 2:00 0 S   Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D   Rule Regina 1946 only - Oct Sun>=8 2:00 0 S - Rule Regina 1947 1959 - Apr lastSun 2:00 1:00 D - Rule Regina 1947 1958 - Sep lastSun 2:00 0 S + Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D + Rule Regina 1947 1957 - Sep lastSun 2:00 0 S + Rule Regina 1959 only - Apr lastSun 2:00 1:00 D   Rule Regina 1959 only - Oct lastSun 2:00 0 S   #   Rule Swift 1957 only - Apr lastSun 2:00 1:00 D
970:   Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D   Rule Edm 1920 only - Oct lastSun 2:00 0 S   Rule Edm 1921 1923 - Sep lastSun 2:00 0 S - Rule Edm 1942 only - Feb 9 2:00 1:00 D + Rule Edm 1942 only - Feb 9 2:00 1:00 W # War + Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace   Rule Edm 1945 only - Sep lastSun 2:00 0 S   Rule Edm 1947 only - Apr lastSun 2:00 1:00 D   Rule Edm 1947 only - Sep lastSun 2:00 0 S
979:   Rule Edm 1969 only - Apr lastSun 2:00 1:00 D   Rule Edm 1969 only - Oct lastSun 2:00 0 S   Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D - Rule Edm 1972 max - Oct lastSun 2:00 0 S - Rule Edm 1987 max - Apr Sun>=1 2:00 1:00 D + Rule Edm 1972 2006 - Oct lastSun 2:00 0 S   # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/Edmonton -7:33:52 - LMT 1906 Sep -  -7:00 Edm M%sT +  -7:00 Edm M%sT 1987 +  -7:00 Canada M%sT         # British Columbia    - # From Paul Eggert (2000-10-02): - # Shanks writes that since 1970 most of this region has been like Vancouver. + # From Paul Eggert (2006-03-22): + # Shanks & Pottenger write that since 1970 most of this region has + # been like Vancouver.   # Dawson Creek uses MST. Much of east BC is like Edmonton.   # Matthews and Vincent (1998) write that Creston is like Dawson Creek.      # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S   Rule Vanc 1918 only - Apr 14 2:00 1:00 D   Rule Vanc 1918 only - Oct 31 2:00 0 S - Rule Vanc 1942 only - Feb 9 2:00 1:00 D + Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War + Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace   Rule Vanc 1945 only - Sep 30 2:00 0 S   Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D   Rule Vanc 1946 only - Oct 13 2:00 0 S   Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S - Rule Vanc 1962 max - Oct lastSun 2:00 0 S - Rule Vanc 1987 max - Apr Sun>=1 2:00 1:00 D + Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S   # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/Vancouver -8:12:28 - LMT 1884 -  -8:00 Vanc P%sT +  -8:00 Vanc P%sT 1987 +  -8:00 Canada P%sT   Zone America/Dawson_Creek -8:00:56 - LMT 1884    -8:00 Canada P%sT 1947    -8:00 Vanc P%sT 1972 Aug 30 2:00
1014:      # Northwest Territories, Nunavut, Yukon    - # From Paul Eggert (1999-10-29): + # From Paul Eggert (2006-03-22):   # Dawson switched to PST in 1973. Inuvik switched to MST in 1979. - # Mathew Englander <mathew@io.org> (1996-10-07) gives the following refs: + # Mathew Englander (1996-10-07) gives the following refs:   # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,   # c. 7 defines Yukon standard time as UTC-9. This is still valid;   # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).   # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.   # * O.I.C. 1980/02 established DST.   # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. - # Shanks says Yukon's 1973-10-28 switch was at 2:00; go with Englander. + # Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go + # with Englander. + # From Chris Walton (2006-06-26): + # Here is a link to the old daylight saving portion of the interpretation + # act which was last updated in 1987: + # http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf      # From Rives McDow (1999-09-04):   # Nunavut ... moved ... to incorporate the whole territory into one time zone.
1038:   # From Paul Eggert (1999-09-20):   # <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html">   # Basic Facts: The New Territory - # </a> (1999) reports that Pangnirtung operates on Eastern time, + # </a> (1999) reports that Pangnirtung operates on eastern time,   # and that Coral Harbour does not observe DST. We don't know when - # Pangnirtung switched to Eastern time; we'll guess 1995. - # We'll ignore the claim about Coral Harbour for now, - # since we have no further info. + # Pangnirtung switched to eastern time; we'll guess 1995.      # From Rives McDow (1999-11-08):   # On October 31, when the rest of Nunavut went to Central time,
1100:   # central time, while Kugluktuk, even farther west, reverted to   # mountain time, which they had used before the advent of Nunavut's   # unified time zone in 1999. + # + # From Rives McDow (2001-01-20), quoting the Nunavut government: + # The preceding decision came into effect at midnight, Saturday Nov 4, 2000.      # From Paul Eggert (2000-12-04):   # Let's just keep track of the official times for now.    -  + # From Rives McDow (2001-03-07): + # The premier of Nunavut has issued a ministerial statement advising + # that effective 2001-04-01, the territory of Nunavut will revert + # back to three time zones (mountain, central, and eastern). Of the + # cities in Nunavut, Coral Harbor is the only one that I know of that + # has said it will not observe dst, staying on EST year round. I'm + # checking for more info, and will get back to you if I come up with + # more. + # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] +  + # From Gwillim Law (2005-05-21): + # According to maps at + # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg + # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg + # (both dated 2003), and + # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp + # (from a 1998 Canadian Geographic article), the de facto and de jure time + # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year + # round. Using Google, it's easy to find other websites that confirm this. + # I wasn't able to find how far back this time regimen goes, but since it + # predates the creation of Nunavut, it probably goes back many years.... + # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. + # + # From Paul Eggert (2005-07-26): + # For lack of better information, assume that Southampton Island observed + # daylight saving only during wartime. +  + # From Chris Walton (2006-07-19): + # The government of Yukon Territory ... recently announced it will extend + # daylight saving in 2007.... http://www.gov.yk.ca/news/2006/06-164.html +    # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S   Rule NT_YK 1918 only - Apr 14 2:00 1:00 D   Rule NT_YK 1918 only - Oct 27 2:00 0 S   Rule NT_YK 1919 only - May 25 2:00 1:00 D   Rule NT_YK 1919 only - Nov 1 0:00 0 S - Rule NT_YK 1942 only - Feb 9 2:00 1:00 D + Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War + Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace   Rule NT_YK 1945 only - Sep 30 2:00 0 S   Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD   Rule NT_YK 1965 only - Oct lastSun 2:00 0 S   Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D - Rule NT_YK 1980 max - Oct lastSun 2:00 0 S - Rule NT_YK 1987 max - Apr Sun>=1 2:00 1:00 D + Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S + Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D   # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/Pangnirtung -4:22:56 - LMT 1884    -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00    -5:00 Canada E%sT 1999 Oct 31 2:00    -6:00 Canada C%sT 2000 Oct 29 2:00 -  -5:00 - EST +  -5:00 Canada E%sT   Zone America/Iqaluit -4:33:52 - LMT 1884 # Frobisher Bay before 1987    -5:00 NT_YK E%sT 1999 Oct 31 2:00    -6:00 Canada C%sT 2000 Oct 29 2:00 -  -5:00 - EST - Zone America/Rankin_Inlet -6:08:40 - LMT 1884 +  -5:00 Canada E%sT + # Now subsumed by America/Atikokan. + #Zone America/Coral_Harbour -5:32:40 - LMT 1884 + # -5:00 NT_YK E%sT 1946 + # -5:00 - EST + Zone America/Rankin_Inlet -6:08:20 - LMT 1884    -6:00 NT_YK C%sT 2000 Oct 29 2:00 -  -5:00 - EST +  -5:00 - EST 2001 Apr 1 3:00 +  -6:00 Canada C%sT   Zone America/Cambridge_Bay -7:00:20 - LMT 1884    -7:00 NT_YK M%sT 1999 Oct 31 2:00 -  -6:00 Canada C%sT +  -6:00 Canada C%sT 2000 Oct 29 2:00 +  -5:00 - EST 2000 Nov 5 0:00 +  -6:00 - CST 2001 Apr 1 3:00 +  -7:00 Canada M%sT   Zone America/Yellowknife -7:37:24 - LMT 1884 -  -7:00 NT_YK M%sT - Zone America/Inuvik -8:54:00 - LMT 1884 +  -7:00 NT_YK M%sT 1980 +  -7:00 Canada M%sT + Zone America/Inuvik -8:54:52 - LMT 1884    -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 -  -7:00 NT_YK M%sT +  -7:00 NT_YK M%sT 1980 +  -7:00 Canada M%sT   Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20    -9:00 NT_YK Y%sT 1966 Jul 1 2:00 -  -8:00 NT_YK P%sT +  -8:00 NT_YK P%sT 1980 +  -8:00 Canada P%sT   Zone America/Dawson -9:17:40 - LMT 1900 Aug 20    -9:00 NT_YK Y%sT 1973 Oct 28 0:00 -  -8:00 NT_YK P%sT +  -8:00 NT_YK P%sT 1980 +  -8:00 Canada P%sT         ###############################################################################      # Mexico    - # Gwillim Law reports this source for daylight saving time in Mexico: - # <a href="http://www.spin.com.mx/verano/"> - # Daylight saving time * SPIN-Internet (in Spanish) - # </a> - # Law (2000-03-09) translates it as follows: + # From Paul Eggert (2001-03-05): + # The Investigation and Analysis Service of the + # Mexican Library of Congress (MLoC) has published a + # <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> + # history of Mexican local time (in Spanish) + # </a>.   # - # Standard time effective in Mexico takes its origin in the - # presidential decree of April 24, 1942. The time of the 120th - # meridian applies to the state of Baja California; of the 105th - # meridian to the states of Baja California Sur, Sonora, Sinaloa, and - # Nayarit; and the time of the 90th meridian to the rest of the - # country. - # - # In the country, there have been several attempts made to adapt - # standard time with the object of arriving at a better use of - # daylight for social and economic activities. In December, 1981 a - # permanent time zone was decreed for the states of Campeche, Yucatan, - # and Quintana Roo, displacing them from the 90th to the 75th - # meridian. This disposition was annulled on December 2, 1982. - # - # In 1988 a Summer Time was established for the states of Tamaulipas, - # Nuevo Leon, Coahuila, and Durango, which meant that from the first - # Sunday in April to the last [Sunday] of October those states - # displaced their time from the 90th to the 75th meridian. That - # disposition lasted for one year. + # Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. + # (In all cases we go with the MLoC.) + # S&P report that Baja was at -8:00 in 1922/1923. + # S&P say the 1930 transition in Baja was 1930-11-16. + # S&P report no DST during summer 1931. + # S&P report a transition at 1932-03-30 23:00, not 1932-04-01.    - # From Paul Eggert (2000-07-26): - # Shanks gives 1942-04-01 instead of 1942-04-24, and omits the 1981 - # and 1988 DST experiments. Go with spin.com.mx. + # From Gwillim Law (2001-02-20): + # There are some other discrepancies between the Decrees page and the + # tz database. I think they can best be explained by supposing that + # the researchers who prepared the Decrees page failed to find some of + # the relevant documents.    - # From Alan Perry <alan.perry@eng.sun.com> (1996-02-15): + # From Alan Perry (1996-02-15):   # A guy from our Mexico subsidiary finally found the Presidential Decree   # outlining the timezone changes in Mexico.   #
1223:   # savings time so as to stay on the same time zone as the southern part of   # Arizona year round.    - # From Jesper Norgaard (2000-12-02): - # No changes have been implemented yet, but the new elected president - # Vicente Fox seems to agree with his presidential candidate opponent - # Labastida that daylight saving should not be discontinued, but maybe - # reduced with a couple of months, e.g. starting one month later and - # ending one month earlier: - # http://www.reforma.com/nacional/articulo/044581/ + # From Jesper Norgaard, translating + # <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): + # In Oaxaca, the 55.000 teachers from the Section 22 of the National + # Syndicate of Education Workers, refuse to apply daylight saving each + # year, so that the more than 10,000 schools work at normal hour the + # whole year.    -  + # From Gwillim Law (2001-01-19): + # <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says + # (translated):... + # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced + # that Summer Time will be reduced from seven to five months, starting + # this year.... + # <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> + # [translated], says "summer time will ... take effect on the first Sunday + # in May, and end on the last Sunday of September. +  + # From Arthur David Olson (2001-01-25): + # The 2001-01-24 traditional Washington Post contained the page one + # story "Timely Issue Divides Mexicans."... + # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html + # ... Mexico City Mayor Lopez Obrador "...is threatening to keep + # Mexico City and its 20 million residents on a different time than + # the rest of the country..." In particular, Lopez Obrador would abolish + # observation of Daylight Saving Time. +  + # <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> + # Official statute published by the Energy Department + # </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, + # and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). +  + # From Paul Eggert (2001-03-03): + # + # <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> + # James F. Smith writes in today's LA Times + # </a> + # * Sonora will continue to observe standard time. + # * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that + # the Federal District will not adopt DST. + # * 4 of 16 district leaders announced they'll ignore the decree. + # * The decree does not affect federal-controlled facilities including + # the airport, banks, hospitals, and schools. + # + # For now we'll assume that the Federal District will bow to federal rules. +  + # From Jesper Norgaard (2001-04-01): + # I found some references to the Mexican application of daylight + # saving, which modifies what I had already sent you, stating earlier + # that a number of northern Mexican states would go on daylight + # saving. The modification reverts this to only cover Baja California + # (Norte), while all other states (except Sonora, who has no daylight + # saving all year) will follow the original decree of president + # Vicente Fox, starting daylight saving May 6, 2001 and ending + # September 30, 2001. + # References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> + # Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) +  + # From Reuters (2001-09-04): + # Mexico's Supreme Court on Tuesday declared that daylight savings was + # unconstitutional in Mexico City, creating the possibility the + # capital will be in a different time zone from the rest of the nation + # next year.... The Supreme Court's ruling takes effect at 2:00 + # a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to + # standard time. "This is so residents of the Federal District are not + # subject to unexpected time changes," a statement from the court said. +  + # From Jesper Norgaard Welen (2002-03-12): + # ... consulting my local grocery store(!) and my coworkers, they all insisted + # that a new decision had been made to reinstate US style DST in Mexico.... + # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) + # confirms this. Sonora as usual is the only state where DST is not applied. +    # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S   Rule Mexico 1939 only - Feb 5 0:00 1:00 D   Rule Mexico 1939 only - Jun 25 0:00 0 S   Rule Mexico 1940 only - Dec 9 0:00 1:00 D   Rule Mexico 1941 only - Apr 1 0:00 0 S - Rule Mexico 1943 only - Dec 16 0:00 1:00 D + Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War   Rule Mexico 1944 only - May 1 0:00 0 S   Rule Mexico 1950 only - Feb 12 0:00 1:00 D   Rule Mexico 1950 only - Jul 30 0:00 0 S - Rule Mexico 1996 max - Apr Sun>=1 2:00 1:00 D - Rule Mexico 1996 max - Oct lastSun 2:00 0 S - # - Rule BajaN 1954 1961 - Apr lastSun 2:00 1:00 D - Rule BajaN 1954 1961 - Sep lastSun 2:00 0 S + Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D + Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S + Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D + Rule Mexico 2001 only - Sep lastSun 2:00 0 S + Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D + Rule Mexico 2002 max - Oct lastSun 2:00 0 S   # Zone NAME GMTOFF RULES FORMAT [UNTIL]   # Quintana Roo   Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 -  -6:00 - CST 1981 Dec -  -5:00 - EST 1982 Dec 2 -  -6:00 - CST 1996 -  -6:00 Mexico C%sT 1997 Oct lastSun 2:00 +  -6:00 - CST 1981 Dec 23    -5:00 Mexico E%sT 1998 Aug 2 2:00    -6:00 Mexico C%sT   # Campeche, Yucatan   Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 -  -6:00 - CST 1981 Dec +  -6:00 - CST 1981 Dec 23    -5:00 - EST 1982 Dec 2    -6:00 Mexico C%sT   # Coahuila, Durango, Nuevo Leon, Tamaulipas - Zone America/Monterrey -6:41:16 - LMT 1922 Jan 1 0:01:32 + Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44    -6:00 - CST 1988    -6:00 US C%sT 1989    -6:00 Mexico C%sT
1270:    -6:00 - CST 1930 Nov 15    -7:00 - MST 1931 May 1 23:00    -6:00 - CST 1931 Oct -  -7:00 - MST 1932 Mar 30 23:00 +  -7:00 - MST 1932 Apr 1 +  -6:00 Mexico C%sT 2001 Sep 30 02:00 +  -6:00 - CST 2002 Feb 20    -6:00 Mexico C%sT   # Chihuahua   Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40
1278:    -6:00 - CST 1930 Nov 15    -7:00 - MST 1931 May 1 23:00    -6:00 - CST 1931 Oct -  -7:00 - MST 1932 Mar 30 23:00 +  -7:00 - MST 1932 Apr 1    -6:00 - CST 1996    -6:00 Mexico C%sT 1998    -6:00 - CST 1998 Apr Sun>=1 3:00
1289:    -6:00 - CST 1930 Nov 15    -7:00 - MST 1931 May 1 23:00    -6:00 - CST 1931 Oct -  -7:00 - MST 1932 Mar 30 23:00 +  -7:00 - MST 1932 Apr 1    -6:00 - CST 1942 Apr 24    -7:00 - MST 1949 Jan 14    -8:00 - PST 1970
1301:    -6:00 - CST 1930 Nov 15    -7:00 - MST 1931 May 1 23:00    -6:00 - CST 1931 Oct -  -7:00 - MST 1932 Mar 30 23:00 +  -7:00 - MST 1932 Apr 1    -6:00 - CST 1942 Apr 24    -7:00 - MST 1949 Jan 14    -8:00 - PST 1970    -7:00 Mexico M%sT   # Baja California   Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 -  +  -7:00 - MST 1924    -8:00 - PST 1927 Jun 10 23:00 -  -7:00 - MST 1930 Nov 16 +  -7:00 - MST 1930 Nov 15 +  -8:00 - PST 1931 Apr 1 +  -8:00 1:00 PDT 1931 Sep 30    -8:00 - PST 1942 Apr 24 -  -7:00 - MST 1949 Jan 14 -  -8:00 BajaN P%sT 1976 +  -8:00 1:00 PWT 1945 Aug 14 23:00u +  -8:00 1:00 PPT 1945 Nov 12 # Peace +  -8:00 - PST 1948 Apr 5 +  -8:00 1:00 PDT 1949 Jan 14 +  -8:00 - PST 1954 +  -8:00 CA P%sT 1961 +  -8:00 - PST 1976    -8:00 US P%sT 1996 -  +  -8:00 Mexico P%sT 2001 +  -8:00 US P%sT 2002 Feb 20    -8:00 Mexico P%sT -  + # From Paul Eggert (2006-03-22): + # Formerly there was an America/Ensenada zone, which differed from + # America/Tijuana only in that it did not observe DST from 1976 + # through 1995. This was as per Shanks (1999). But Shanks & Pottenger say + # Ensenada did not observe DST from 1948 through 1975. Guy Harris reports + # that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and + # Tijuana observe DST," which agrees with Shanks & Pottenger but implies that + # DST-observance was a town-by-town matter back then. This concerns + # data after 1970 so most likely there should be at least one Zone + # other than America/Tijuana for Baja, but it's not clear yet what its + # name or contents should be.   #   # Revillagigedo Is   # no information
1333:    -4:00 - AST      # Bahamas + # + # From Sue Williams (2006-12-07): + # The Bahamas announced about a month ago that they plan to change their DST + # rules to sync with the U.S. starting in 2007.... + # http://www.jonesbahamas.com/?c=45&a=10412 +    # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S - Rule Bahamas 1964 max - Oct lastSun 2:00 0 S + Rule Bahamas 1964 2006 - Oct lastSun 2:00 0 S   Rule Bahamas 1964 1986 - Apr lastSun 2:00 1:00 D - Rule Bahamas 1987 max - Apr Sun>=1 2:00 1:00 D +    # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/Nassau -5:09:24 - LMT 1912 Mar 2 -  -5:00 Bahamas E%sT +  -5:00 Bahamas E%sT 1976 +  -5:00 US E%sT      # Barbados   # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1354:    -4:00 Barb A%sT      # Belize - # Whitman entirely disagrees with Shanks; go with Shanks. + # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.   # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S   Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD   Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S
1367:    -6:00 Belize C%sT      # Bermuda +  + # From Dan Jones, reporting in The Royal Gazette (2006-06-26): +  + # Next year, however, clocks in the US will go forward on the second Sunday + # in March, until the first Sunday in November. And, after the Time Zone + # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on + # Friday, the same thing will happen in Bermuda. + # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 +    # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton    -4:00 - AST 1974 Apr 28 2:00 -  -4:00 Bahamas A%sT +  -4:00 Bahamas A%sT 1976 +  -4:00 US A%sT      # Cayman Is   # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1383:   Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D   Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S   Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D - # IATA SSIM (1991-09) says the following was at 1:00; go with Shanks. + # IATA SSIM (1991-09) says the following was at 1:00; + # go with Shanks & Pottenger.   Rule CR 1991 only - Jul 1 0:00 0 S   Rule CR 1992 only - Mar 15 0:00 0 S   # There are too many San Joses elsewhere, so we'll use `Costa Rica'.
1407:   # to DST--and one more hour on 1999-04-04--when the announcers will have   # returned to Baltimore, which switches on that date.)    + # From Evert van der Veer via Steffen Thorsen (2004-10-28): + # Cuba is not going back to standard time this year. + # From Paul Eggert (2006-03-22): + # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html + # says that it's due to a problem at the Antonio Guiteras + # thermoelectric plant, and says "This October there will be no return + # to normal hours (after daylight saving time)". + # For now, let's assume that it's a temporary measure. +  + # From Carlos A. Carnero Delgado (2005-11-12): + # This year (just like in 2004-2005) there's no change in time zone + # adjustment in Cuba. We will stay in daylight saving time: + # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html +  + # From Jesper Norgaard Welen (2006-10-21): + # An article in GRANMA INTERNACIONAL claims that Cuba will end + # the 3 years of permanent DST next weekend, see + # http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html + # "On Saturday night, October 28 going into Sunday, October 29, at 01:00, + # watches should be set back one hour -- going back to 00:00 hours -- returning + # to the normal schedule.... +    # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S   Rule Cuba 1928 only - Jun 10 0:00 1:00 D   Rule Cuba 1928 only - Oct 10 0:00 0 S
1435:   Rule Cuba 1996 only - Oct 6 0:00s 0 S   Rule Cuba 1997 only - Oct 12 0:00s 0 S   Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D - Rule Cuba 1998 max - Oct lastSun 0:00s 0 S + Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S   Rule Cuba 2000 max - Apr Sun>=1 0:00s 1:00 D -  + Rule Cuba 2006 max - Oct lastSun 0:00s 0 S      # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/Havana -5:29:28 - LMT 1890
1484:    -4:00 - AST      # El Salvador +    # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S   Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D   Rule Salv 1987 1988 - Sep lastSun 0:00 0 S - # There are too many San Salvadors elsewhere, so we'll use `El Salvador'. + # There are too many San Salvadors elsewhere, so use America/El_Salvador + # instead of America/San_Salvador.   # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador    -6:00 Salv C%sT
1503:    -4:00 - AST      # Guatemala + # + # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: + # Diario Co Latino, at + # http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079, + # says in an article dated 2006-04-19 that the Guatemalan government had + # decided on that date to advance official time by 60 minutes, to lessen the + # impact of the elevated cost of oil.... Daylight saving time will last from + # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). + # From Paul Eggert (2006-06-22): + # The Ministry of Energy and Mines, press release CP-15/2006 + # (2006-04-19), says DST ends at 24:00. See + # <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>. +    # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S   Rule Guat 1973 only - Nov 25 0:00 1:00 D   Rule Guat 1974 only - Feb 24 0:00 0 S
1510:   Rule Guat 1983 only - Sep 22 0:00 0 S   Rule Guat 1991 only - Mar 23 0:00 1:00 D   Rule Guat 1991 only - Sep 7 0:00 0 S + Rule Guat 2006 only - Apr 30 0:00 1:00 D + Rule Guat 2006 only - Oct 1 0:00 0 S   # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5    -6:00 Guat C%sT      # Haiti -  + # From Gwillim Law (2005-04-15): + # Risto O. Nykanen wrote me that Haiti is now on DST. + # I searched for confirmation, and I found a + # <a href="http://www.haitianconsulate.org/time.doc"> press release + # on the Web page of the Haitian Consulate in Chicago (2005-03-31), + # </a>. Translated from French, it says: + # + # "The Prime Minister's Communication Office notifies the public in general + # and the press in particular that, following a decision of the Interior + # Ministry and the Territorial Collectivities [I suppose that means the + # provinces], Haiti will move to Eastern Daylight Time in the night from next + # Saturday the 2nd to Sunday the 3rd. + # + # "Consequently, the Prime Minister's Communication Office wishes to inform + # the population that the country's clocks will be set forward one hour + # starting at midnight. This provision will hold until the last Saturday in + # October 2005. + # + # "Port-au-Prince, March 31, 2005" + # + # From Steffen Thorsen (2006-04-04): + # I have been informed by users that Haiti observes DST this year like + # last year, so the current "only" rule for 2005 might be changed to a + # "max" rule or to last until 2006. (Who knows if they will observe DST + # next year or if they will extend their DST like US/Canada next year). + # + # I have found this article about it (in French): + # http://www.haitipressnetwork.com/news.cfm?articleID=7612 + # + # The reason seems to be an energy crisis. +  +    # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S   Rule Haiti 1983 only - May 8 0:00 1:00 D   Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D   Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S - # Shanks says AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. Go with IATA. + # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. + # Go with IATA.   Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D   Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S -  + Rule Haiti 2005 max - Apr Sun>=1 0:00 1:00 D + Rule Haiti 2005 max - Oct lastSun 0:00 0 S   # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/Port-au-Prince -4:49:20 - LMT 1890    -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT    -5:00 Haiti E%sT      # Honduras - # Shanks says 1921 Jan 1; go with Whitman's more precise Apr 1. + # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. +  + # From Paul Eggert (2006-05-05): + # worldtimezone.com reports a 2006-05-02 Spanish-language AP article + # saying Honduras will start using DST midnight Saturday, effective 4 + # months until September. La Tribuna reported today + # <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president + # of Honduras, refused to back down on this. +  + # From Jesper Norgaard Welen (2006-08-08): + # It seems that Honduras has returned from DST to standard time this Monday at + # 00:00 hours (prolonging Sunday to 25 hours duration). + # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html +  + # From Paul Eggert (2006-08-08): + # Also see Diario El Heraldo, The country returns to standard time (2006-08-08) + # <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>. + # It mentions executive decree 18-2006. +  + # From Steffen Thorsen (2006-08-17): + # Honduras will observe DST from 2007 to 2009, exact dates are not + # published, I have located this authoritative source: + # http://www.presidencia.gob.hn/noticia.aspx?nId=47 +  + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S + Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D + Rule Hond 1987 1988 - Sep lastSun 0:00 0 S + Rule Hond 2006 2009 - May Sun>=1 0:00 1:00 D + Rule Hond 2006 2009 - Aug Mon>=1 0:00 0 S   # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr -  -6:00 Salv C%sT +  -6:00 Hond C%sT   #   # Great Swan I ceded by US to Honduras in 1972   
1543:   # From U. S. Naval Observatory (1989-01-19):   # JAMAICA 5 H BEHIND UTC    - # From Shanks: + # From Shanks & Pottenger:   # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston    -5:07:12 - KMT 1912 Feb # Kingston Mean Time
1554:   # Martinique   # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France -  -4:04 - FFMT 1911 May # Fort-de-France MT +  -4:04:20 - FFMT 1911 May # Fort-de-France MT    -4:00 - AST 1980 Apr 6    -4:00 1:00 ADT 1980 Sep 28    -4:00 - AST      # Montserrat - # From Paul Eggert (1997-08-31): - # Recent volcanic eruptions have forced evacuation of Plymouth, the capital. - # Luckily, Olveston, the current de facto capital, has the same longitude. + # From Paul Eggert (2006-03-22): + # In 1995 volcanic eruptions forced evacuation of Plymouth, the capital. + # world.gazetteer.com says Cork Hill is the most populous location now.   # Zone NAME GMTOFF RULES FORMAT [UNTIL] - Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Olveston + Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill    -4:00 - AST      # Nicaragua   # - # From Steffen Thorsen (1998-12-29): - # Nicaragua seems to be back at -6:00 but I have not been able to find when - # they changed from -5:00. + # This uses Shanks & Pottenger for times before 2005.   # -  + # From Steffen Thorsen (2005-04-12): + # I've got reports from 8 different people that Nicaragua just started + # DST on Sunday 2005-04-10, in order to save energy because of + # expensive petroleum. The exact end date for DST is not yet + # announced, only "September" but some sites also say "mid-September". + # Some background information is available on the President's official site: + # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm + # The Decree, no 23-2005 is available here: + # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2005/Decreto%2023-2005%20Se%20adelanta%20en%20una%20hora%20en%20todo%20el%20territorio%20nacional%20apartir%20de%20las%2024horas%20del%2009%20de%20Abril.pdf + # + # From Paul Eggert (2005-05-01): + # The decree doesn't say anything about daylight saving, but for now let's + # assume that it is daylight saving.... + # + # From Gwillim Law (2005-04-21): + # The Associated Press story on the time change, which can be found at + # http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html + # and elsewhere, says (fifth paragraph, translated from Spanish): "The last + # time that a change of clocks was applied to save energy was in the year 2000 + # during the Arnoldo Aleman administration."... + # The northamerica file says that Nicaragua has been on UTC-6 continuously + # since December 1998. I wasn't able to find any details of Nicaraguan time + # changes in 2000. Perhaps a note could be added to the northamerica file, to + # the effect that we have indirect evidence that DST was observed in 2000. + # + # From Jesper Norgaard Welen (2005-11-02): + # Nicaragua left DST the 2005-10-02 at 00:00 (local time). + # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm + # (2005-09-26) + # + # From Jesper Norgaard Welen (2006-05-05): + # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 + # (my informal translation) + # By order of the president of the republic, Enrique Bolanos, Nicaragua + # advanced by sixty minutes their official time, yesterday at 2 in the + # morning, and will stay that way until 30.th. of september. + # + # From Jesper Norgaard Welen (2006-09-30): + # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf + # My informal translation runs: + # The natural sun time is restored in all the national territory, in that the + # time is returned one hour at 01:00 am of October 1 of 2006. + #   # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S   Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D   Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S - Rule Nic 1992 only - Jan 1 4:00 1:00 D - Rule Nic 1992 only - Sep 24 0:00 0 S + Rule Nic 2005 only - Apr 10 0:00 1:00 D + Rule Nic 2005 only - Oct Sun>=1 0:00 0 S + Rule Nic 2006 only - Apr 30 2:00 1:00 D + Rule Nic 2006 only - Oct Sun>=1 1:00 0 S   # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/Managua -5:45:08 - LMT 1890 -  -5:45 - MMT 1934 Jun 23 # Managua Mean Time +  -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time?    -6:00 - CST 1973 May    -5:00 - EST 1975 Feb 16 -  -6:00 Nic C%sT 1993 Jan 1 4:00 -  -5:00 - EST 1998 Dec -  -6:00 - CST +  -6:00 Nic C%sT 1992 Jan 1 4:00 +  -5:00 - EST 1992 Sep 24 +  -6:00 - CST 1993 +  -5:00 - EST 1997 +  -6:00 Nic C%sT      # Panama   # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/Panama -5:18:08 - LMT 1890 -  -5:20 - PMT 1908 Apr 22 # Panama Mean Time +  -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time    -5:00 - EST      # Puerto Rico
1598:   # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan    -4:00 - AST 1942 May 3 -  -4:00 1:00 AWT 1945 Sep 30 2:00 +  -4:00 US A%sT 1946    -4:00 - AST      # St Kitts-Nevis
1609:   # St Lucia   # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries -  -4:04 - CMT 1912 # Castries Mean Time +  -4:04:00 - CMT 1912 # Castries Mean Time    -4:00 - AST      # St Pierre and Miquelon
1617:   # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre    -4:00 - AST 1980 May -  -3:00 Mont PM%sT # Pierre & Miquelon Time +  -3:00 - PMST 1987 # Pierre & Miquelon Time +  -3:00 Canada PM%sT      # St Vincent and the Grenadines   # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1626:    -4:00 - AST      # Turks and Caicos - # From Paul Eggert (1998-08-06): - # Shanks says they use US DST rules, but IATA SSIM (1991/1998) + # From Paul Eggert (2006-03-22): + # Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998)   # says they switch at midnight. Go with IATA SSIM.   # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S   Rule TC 1979 1986 - Apr lastSun 0:00 1:00 D