# @(#)northamerica 7.15 # 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 (August 17, 1994): # A reliable and entertaining source about time zones is # Derek Howse, Greenwich time and the discovery of the longitude, # Oxford University Press (1980). ############################################################################### # United States # From Arthur David Olson: # US Daylight Saving Time ended on the last Sunday of *October* in 1974. # See, for example, the front page of the Saturday, October 26, 1974 # and Sunday, October 27, 1974 editions of the Washington Post. # From seismo!munnari!kre: # I recall also being told by someone once that Canada didn't have # the DST variations in 74/75 that the US did, but I am not nearly # sure enough of this to add anything. # From Arthur David Olson: # The above has been confirmed by Bob Devine; we'll go with it here. # From Arthur David Olson: # Before the Uniform Time Act of 1966 took effect in 1967, observance of # Daylight Saving Time in the US was by local option, except during wartime. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule US 1918 1919 - Mar lastSun 2:00 1:00 D Rule US 1918 1919 - Oct lastSun 2:00 0 S Rule US 1942 only - Feb 9 2:00 1:00 W # War Rule US 1945 only - Sep 30 2:00 0 S Rule US 1967 max - 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 # From Bob Devine (January 28, 1988): # ...Alaska (and Hawaii) had the timezone names changed in 1967. # old new # Pacific Standard Time(PST) -same- # Yukon Standard Time(YST) -same- # Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) # Nome Standard Time (NT) Bering Standard Time (BST) # # ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. # The YST zone now covers nearly all of the state, AHST just part # of the Aleutian islands. No DST. # From U. S. Naval Observatory (January 19, 1989): # USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 # USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON # USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 # USA MOUNTAIN 7 H BEHIND UTC DENVER # USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 # USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO # USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 # USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) # USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) # USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W # USA - " - 9 H BEHIND UTC APR 3 - OCT 30 # USA HAWAII 10 H BEHIND UTC # USA BERING 11 H BEHIND UTC SAMOA, MIDWAY # From Arthur David Olson (January 21, 1989): # The above dates are for 1988. # Note the "AKST" and "AKDT" abbreviations, the claim that there's # no DST in Samoa, and the claim that there is DST in Alaska and the # Aleutians. # From Arthur David Olson (February 13, 1988): # Legal standard time zone names, from United States Code (1982 Edition and # Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names # up to April 1, 1967 (when most provisions of the Uniform Time Act of 1966 # took effect), as explained in sections 263 and 261: # (none) # United States standard eastern time # United States standard mountain time # United States standard central time # United States standard Pacific time # (none) # United States standard Alaska time # (none) # Next, names from April 1, 1967 until November 30, 1983 (the date for # public law 98-181): # Atlantic standard time # eastern standard time # central standard time # mountain standard time # Pacific standard time # Yukon standard time # Alaska-Hawaii standard time # Bering standard time # And after November 30, 1983: # Atlantic standard time # eastern standard time # central standard time # mountain standard time # Pacific standard time # Alaska standard time # Hawaii-Aleutian standard time # Samoa standard time # The law doesn't give abbreviations. # From Paul Eggert (August 16, 1994): # Howse writes that Alaska switched from the Julian to the Gregorian calendar, # and from east-of-GMT to west-of-GMT days, in 1867 when the US purchased it # from Russia. We don't have this data pinned down yet, though. # Easy stuff first--including Alaska, where we ignore history (since we # can't tell if we should give Yukon time or Alaska-Hawaii time for "old" # times). # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/New_York -5:00 US E%sT Zone America/Chicago -6:00 US C%sT Zone America/Denver -7:00 US M%sT Zone America/Los_Angeles -8:00 US P%sT Zone America/Anchorage -9:00 US AK%sT # AK%sT is the abbreviation per USNO # ZONE-DESCR America New_York United_States Eastern time (except Indiana and Michigan) # ZONE-DESCR America Chicago United_States Central time # ZONE-DESCR America Denver United_States Mountain time (except Arizona) # ZONE-DESCR America Los_Angeles United_States Pacific time # ZONE-DESCR America Anchorage United_States Alaska time # Mainland US areas that are always Standard as of 1986. Zone America/Fort_Wayne -5:00 US E%sT 1946 -5:00 - EST # Always EST as of 1986 # From Arthur David Olson (October 28, 1991): # An article on page A3 of the Sunday, October 27, 1991 Washington Post # notes that Starke County switched from Central time to Eastern time as of # October 27, 1991. Zone America/Knox_IN -6:00 US C%sT 1991 Oct 27 2:00 -5:00 - EST # Always EST as of 1991 Zone America/Phoenix -7:00 US M%sT 1946 -7:00 - MST # Always MST as of 1986 # ZONE-DESCR America Fort_Wayne United_States Indiana (except Starke County) # ZONE-DESCR America Knox_IN United_States Indiana (Starke County) # ZONE-DESCR America Phoenix United_States Arizona (except Navajo Nation) # ZONE-DESCR America Shiprock United_States Arizona (Navajo Nation) # From Arthur David Olson (February 13, 1988): # However. . .a writer from the Inter Tribal Council of Arizona, Inc., # notes in private correspondence dated 12/28/87 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 # From Bob Devine (January 28, 1988): # Michigan didn't observe DST from 1968 to 1973. Zone America/Detroit -5:00 US E%sT 1968 -5:00 - EST 1973 -5:00 US E%sT # ZONE-DESCR America Detroit United_States Michigan # Samoa just changes names. No DST, per Naval Observatory. # # Howse writes that in 1879 the King of Samoa decided to change # ``the date in his kingdom from the Antipodean to the American system, # ordaining -- by a masterpiece of diplomatic flattery -- that # the Fourth of July should be celebrated twice in that year.'' Zone Pacific/Pago_Pago 12:37:12 - LMT 1879 Jul 5 -11:22:48 - LMT 1911 -11:30 - SST 1950 -11:00 - NST 1967 Apr # N=Nome -11:00 - BST 1983 Nov 30 # B=Bering -11:00 - SST # S=Samoa Zone Pacific/Midway -11:49:28 - LMT 1901 -11:00 - NST 1967 Apr # N=Nome -11:00 - BST 1983 Nov 30 # B=Bering -11:00 - SST # S=Samoa # Aleutian has a name change. DST, per Naval Observatory. Zone America/Atka -10:00 US AH%sT 1983 Nov 30 -10:00 US HA%sT # From Arthur David Olson: # And then there's Hawaii. # DST was observed for one day in 1933; # Standard time was change by half an hour in 1947; # it's always standard as of 1986. Zone Pacific/Honolulu -10:30 US H%sT 1933 Apr 30 2:00 -10:30 1:00 HDT 1933 May 1 2:00 -10:30 US H%sT 1947 Jun 8 2:00 -10:00 - HST # Same time in American and Western Samoa Link Pacific/Pago_Pago Pacific/Apia # ZONE-DESCR Pacific Pago_Pago United_States American Samoa # ZONE-DESCR Pacific Apia Western_Samoa All points # ZONE-DESCR Pacific Midway United_States Midway Island # ZONE-DESCR America Atka United_States Aleutian Islands # ZONE-DESCR Pacific Honolulu United_States Hawaii # Navassa # no information; probably like US/Eastern ################################################################################ # From Paul Eggert (November 18, 1993): # A good source for time zone historical data outside the U.S. is # Thomas G. Shanks, The International Atlas (3rd edition), # San Diego: ACS Publications, Inc. (1991). # Except where otherwise noted, it is the source for the data below. # # 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. # # I invented the abbreviation SPST for St Pierre Standard Time; SPDT likewise. # Corrections are welcome! # # See the `europe' file for Greenland. # # See the `africa' file for Zone naming conventions. # Canada # Canada is reportedly lots easier than the US--leastways since 1951. # I don't know what they did before then. # 4.3BSD claims that it's perfectly regular. # According to a posting in "comp.bugs.misc", "comp.unix.wizards", etc. # on February 8, 1987, by Dave Sherman of the Law Society of Upper Canada, # "...Canada (well, Ontario and at least some of the other provinces) are # adopting the new daylight savings time rules...". We assume all of # Canada is doing so. # From Bob Devine (January 28, 1988): # All of Canada did have DST from your first rule except Saskatchewan. # Which parts did not observe DST is hard to pinpoint but most of the # province follows the rules. # NOTE: those that didn't have DST for that rule, also # probably did not have it for several years previous. # From U. S. Naval Observatory (January 19, 1989): # CANADA NEW FDL 3.5H BEHIND UTC ST.JOHN'S # CANADA NEW FDL 1.5H BEHIND UTC APR 3 - OCT 29 # CANADA ATLANTIC 4 H BEHIND UTC HALIFAX # CANADA ATLANTIC 3 H BEHIND UTC APR 3 - OCT 29 # CANADA EASTERN 5 H BEHIND UTC TORONTO, MONTREAL, OTTAWA # CANADA EASTERN 4 H BEHIND UTC APR 3 - OCT 29 # CANADA CENTRAL 6 H BEHIND UTC REGINA, WINNIPEG # CANADA CENTRAL 5 H BEHIND UTC APR 3 - OCT 29 # CANADA MOUNTAIN 7 H BEHIND UTC CALGARY, EDMONTON # CANADA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 29 # CANADA PACIFIC 8 H BEHIND UTC VANCOUVER # CANADA PACIFIC 7 H BEHIND UTC APR 3 - OCT 29 # CANADA YUKON SAME AS PACIFIC DAWSON # From Arthur David Olson (January 21, 1989): # April 3 fell on a Sunday in 1988; October 29 fell on a Sunday in 1989. Ahem. # Note claim that there's double DST in Newfoundland and that Yukon should # be same as Pacific. # From W. Jones (jones@skdad.usask.ca) (November 6, 1992): # The. . .below is based on information I got from our law library, the # provincial archives, and the provincial Community Services department. # A precise history would require digging through newspaper archives, and # since you didn't say what you wanted, I didn't bother. # # Saskatchewan is split by a time zone meridian (105W) and over the years # the boundary became pretty ragged as communities near it reevaluated # their affiliations in one direction or the other. In 1965 a provincial # referendum favoured legislating common time practices. # # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of # Saskatchewan 1978) was proclaimed, and established that the eastern # part of Saskatchewan would use CST year round, that districts in # northwest Saskatchewan would by default follow CST but could opt to # follow Mountain Time rules (thus 1 hour difference in the winter and # zero in the summer), and that districts in southwest Saskatchewan would # by default follow MT but could opt to follow CST. # # It took a few years for the dust to settle (I know one story of a town # on one time zone having its school in another, such that a mom had to # serve her family lunch in two shifts), but presently it seems that only # a few towns on the border with Alberta (e.g. Lloydminster) follow MT # rules any more; all other districts appear to have used CST year round # since sometime in the 1960s. # # Here's how I would summarize things. Establish a "Saskatchewan" CST # time zone, and note that it officially exists as of 15 April 1966. Any # current exceptions can put themselves in the "Mountain" zone, since # those are the rules they follow. Any past exceptions can be forgotten, # since that's what those who live here have done. # From Arthur David Olson (November 21, 1992): # East-Saskatchewan kept to avoid problems for folks using that zone by name; # plain Saskatchewan added. # From Alain LaBont (1994-11-14): # I post here the time zone abbreviations standardized in Canada # for both English and French in the CAN/CSA-Z234.4-89 standard.... # # UTC Standard time Daylight savings time # offset French English French English # -2:30 - - HAT NDT # -3 - - HAA ADT # -3:30 HNT NST - - # -4 HNA AST HAE EDT # -5 HNE EST HAC CDT # -6 HNC CST HAR MDT # -7 HNR MST HAP PDT # -8 HNP PST HAY YDT # -9 HNY YST - - # # HN: Heure Normale ST: Standard Time # HA: Heure Avance DT: Daylight saving Time # # A: de l'Atlantique Atlantic # C: du Centre Central # E: de l'Est Eastern # M: Mountain # N: Newfoundland # P: du Pacifique Pacific # R: des Rocheuses # T: de Terre-Neuve # Y: du Yukon Yukon # # From Paul Eggert (1994-11-22): # Alas, this sort of thing must be handled by localization software. # From Shanks (1991): # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule StJohns 1884 only - Jan 1 0:00 0 S Rule StJohns 1917 1918 - Apr Sun>=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. 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. 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 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. Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S Rule StJohns 1960 max - Oct lastSun 2:00 0 S Rule StJohns 1987 only - Apr Sun>=1 2:00 1:00 D Rule StJohns 1988 only - Apr Sun>=1 2:00 2:00 D Rule StJohns 1989 max - Apr Sun>=1 2:00 1:00 D # 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 -3:31 StJohns N%sT 1935 Mar 30 -3:30 StJohns N%sT # ZONE-DESCR America St_Johns Canada Newfoundland # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Halifax 1902 only - Jun 15 0:00 0 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 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 -4:00 Halifax A%sT # ZONE-DESCR America Halifax Canada Atlantic time # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Mont 1884 only - Jan 1 0:00 0 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 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Montreal -4:54:16 - LMT 1884 -5:00 Mont E%sT # ZONE-DESCR America Montreal Canada Eastern time # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Winn 1887 only - Jul 16 0:00 0 S Rule Winn 1916 only - Apr 23 0:00 1:00 D Rule Winn 1916 only - Sep 17 0:00 0 S Rule Winn 1918 only - Apr 14 2:00 1:00 D Rule Winn 1918 only - Oct 31 2:00 0 S Rule Winn 1937 only - May 16 2:00 1:00 D Rule Winn 1937 only - Sep 23 2:00 0 S Rule Winn 1942 only - Feb 9 2:00 1:00 D Rule Winn 1945 only - Sep lastSun 2:00 0 S Rule Winn 1946 only - May 12 2:00 1:00 D Rule Winn 1946 only - Oct 13 2:00 0 S Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D Rule Winn 1947 1958 - Sep lastSun 2:00 0 S Rule Winn 1948 only - May 1 2:00 1:00 D Rule Winn 1948 1960 - Apr lastSun 2:00 1:00 D Rule Winn 1959 only - Oct lastSun 2:00 0 S Rule Winn 1960 only - Sep lastSun 2:00 0 S Rule Winn 1963 only - Apr lastSun 2:00 1:00 D Rule Winn 1963 only - Sep lastSun 2:00 0 S Rule Winn 1966 1986 - Apr lastSun 2:00 1:00 D Rule Winn 1966 max - Sep lastSun 2:00 0 S Rule Winn 1987 max - Apr Sun>=1 2:00 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 -6:00 Winn C%sT # ZONE-DESCR America Winnipeg Canada Manitoba # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Regina 1905 only - Sep 1 0:00 0 S Rule Regina 1918 only - Apr 14 2:00 1:00 D Rule Regina 1918 only - Oct 31 2:00 0 S Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D Rule Regina 1937 only - Oct Sun>=8 0:00 0 S Rule Regina 1938 only - Oct Sun>=1 0:00 0 S Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S Rule Regina 1942 only - Feb 9 2:00 1:00 D Rule Regina 1945 only - Sep lastSun 2:00 0 S Rule Regina 1946 only - Apr 14 2:00 1:00 D Rule Regina 1946 only - Oct 13 2:00 0 S Rule Regina 1947 1960 - Apr lastSun 2:00 1:00 D Rule Regina 1947 1959 - Sep lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Regina -6:58:36 - LMT 1905 Sep -7:00 Regina M%sT 1966 Apr 15 -6:00 - CST # ZONE-DESCR America Regina Canada Saskatchewan # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Edm 1906 only - Sep 1 0:00 0 S Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D Rule Edm 1918 only - Oct 31 2:00 0 S Rule Edm 1919 only - May 27 2:00 0 S Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D Rule Edm 1920 only - Oct lastSun 2:00 0 S Rule Edm 1921 1923 - Sep lastSun 2:00 0 S Rule Edm 1942 only - Feb 9 2:00 1:00 D Rule Edm 1945 only - Sep lastSun 2:00 0 S Rule Edm 1947 only - Apr lastSun 2:00 1:00 D Rule Edm 1947 only - Sep lastSun 2:00 0 S Rule Edm 1967 only - Apr lastSun 2:00 1:00 D Rule Edm 1967 only - Oct lastSun 2:00 0 S Rule Edm 1969 only - Apr lastSun 2:00 1:00 D Rule Edm 1969 only - Oct lastSun 2:00 0 S Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D Rule Edm 1972 max - Oct lastSun 2:00 0 S Rule Edm 1987 max - Apr Sun>=1 2:00 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Edmonton -7:33:52 - LMT 1906 Sep -7:00 Edm M%sT # ZONE-DESCR America Edmonton Canada Alberta # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Vanc 1884 only - Jan 1 0:00 0 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 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 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Vancouver -8:12:28 - LMT 1884 -8:00 Vanc P%sT # ZONE-DESCR America Vancouver Canada British Columbia # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Yukon 1900 only - Jan 1 0:00 0 S Rule Yukon 1918 only - Apr 14 2:00 1:00 D Rule Yukon 1918 only - Oct 27 2:00 0 S Rule Yukon 1919 only - May 25 2:00 1:00 D Rule Yukon 1919 only - Nov 1 0:00 0 S Rule Yukon 1942 only - Feb 9 2:00 1:00 D Rule Yukon 1965 only - Apr 25 0:00 1:00 D Rule Yukon 1965 only - Oct 31 2:00 0 S Rule Yukon 1980 1986 - Apr lastSun 2:00 1:00 D Rule Yukon 1980 max - Oct lastSun 2:00 0 S Rule Yukon 1987 max - Apr Sun>=1 2:00 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 -9:00 Yukon Y%sT 1966 Jul -8:00 Yukon P%sT # Parts of Yukon (e.g. Dawson) didn't switch to -8:00 until 1973 Oct 28. # ZONE-DESCR America Whitehorse Canada Yukon Territory ############################################################################### # Mexico # From Guy Harris: # Rules are from the Official Airline Guide, Worldwide Edition, for 1987. # Rules prior to 1987 are unknown. # The comments in the OAG say "Only Ensenada, Mexicale, San Felipe and Tijuana # observe DST." This is presumably Baja California Norte, above 28th parallel, # as listed there; Mexico/BajaSur is for "Baja California Sur and N. Pacific # Coast (States of Sinaloa and Sonora)." # From Bob Devine (January 28, 1988): # The Federal District (where Mexico City is) has observed [DST] several # times but not recently. # # I don't where to drawn the line in the North Baja area. 28th latitude # sounds good -- but it may be higher (how far [d]o radio stations from # San Diego affect culture?). # # The dates of DST probably go back to 1981. The rules are the same as # US's. This is going to be a headache for US presidential electi[o]n years! # From Arthur David Olson (February 13, 1988) # Since the 1981 starting date is only "probable," we'll keep the 1987 # starting date below. # From U. S. Naval Observatory (January 19, 1989): # MEXICO BAJA CAL N 7 H BEHIND UTC BAJA CALIFORNIA SUR AND # MEXICO BAJA CAL N N. PACIFIC COAST (STATES # MEXICO BAJA CAL N OF SINALOA AND SONORA) # MEXICO BAJA CAL N 8 H BEHIND UTC ABOVE 28TH PARALLAL APR 3 # MEXICO BAJA CAL N - OCT 29 # MEXICO BAJA CAL N 7 H BEHIND UTC ABOVE 28TH PARALLAL APR 3 # MEXICO BAJA CAL N - 0CT 29 # MEXICO 6 H BEHIND UTC STATES OF DURANGO, # MEXICO COAHUILA, NUEVO LEON, # MEXICO TAMAULIPAS # MEXICO 5 H BEHIND UTC STATES OF DURANGO, # MEXICO COAHUILA, NUEVO LEON, # MEXICO TAMAULIPAS APR 3 - OCT 29 # MEXICO 6 H BEHIND UTC GENERAL MEXICO, STATES OF # MEXICO CAMPECHE, QUINTANA ROO AND # MEXICO YUCATAN # From Arthur David Olson (January 21, 1989): # April 3 fell on a Sunday in 1988; October 29 fell on a Sunday in 1989. Ahem. # USNO claims there should be four Mexican zones rather than three: # a zone that's GMT-8 with DST; a zone that's always GMT-7; # a zone that's GMT-6 with DST; and a zone that's always GMT-6. # From Paul Eggert (November 18, 1993): # Shanks also says there are four zones, but disagrees about the fourth. # Instead of GMT-6 with DST, he says there's GMT-8 without DST. # From Shanks (1991): # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Mexico 1922 only - Jan 1 0:00 0 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 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 BajaN 1950 1966 - Apr lastSun 2:00 1:00 D Rule BajaN 1950 1961 - Sep lastSun 2:00 0 S Rule BajaN 1961 1966 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct -7:00 - MST 1932 Mar 30 23:00 -6:00 Mexico C%sT # ZONE-DESCR America Mexico_City Mexico Mexico City Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct -7:00 - MST 1932 Mar 30 23:00 -6:00 - CST 1942 Apr -7:00 - MST 1949 Jan 14 -8:00 - PST 1970 -7:00 - MST # ZONE-DESCR America Mazatlan Mexico Mazatlan Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 -8:00 - PST 1927 Jun 10 23:00 -7:00 - MST 1930 Nov 16 -8:00 - PST 1942 Apr -7:00 - MST 1949 Jan 14 -8:00 BajaN P%sT 1967 Apr lastSun 2:00 -8:00 US P%sT # ZONE-DESCR America Tijuana Mexico Baja California Norte Zone America/Ensenada -7:46:28 - LMT 1922 Jan 1 0:13:32 -8:00 - PST 1927 Jun 10 23:00 -7:00 - MST 1930 Nov 16 -8:00 - PST 1942 Apr -7:00 - MST 1949 Jan 14 -8:00 - PST # ZONE-DESCR America Ensenada Mexico Ensenada # # Revillagigedo Is # no information ############################################################################### # Anguilla # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2 -4:00 - AST # ZONE-DESCR America Anguilla Anguilla All points # Antigua and Barbuda # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 -5:00 - EST 1951 -4:00 - AST # ZONE-DESCR America Antigua Antigua All points # Bahamas # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Bahamas 1912 only - Mar 2 0:00 0 S Rule Bahamas 1964 max - 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 # ZONE-DESCR America Nassau Bahamas All points # Barbados # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Barb 1932 only - Jan 1 0:00 0 S Rule Barb 1977 only - Jun 12 2:00 1:00 D Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D Rule Barb 1979 only - Sep 30 2:00 0 S Rule Barb 1980 only - Sep 25 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Barbados -3:58:28 - LMT 1924 # Bridgetown -3:58 - BMT 1932 # Bridgetown Mean Time -4:00 Barb A%sT # ZONE-DESCR America Barbados Barbados All points # Belize # Whitman entirely disagrees with Shanks; go with Shanks. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Belize 1912 only - Apr 1 0:00 0 S Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S Rule Belize 1973 only - Dec 5 0:00 1:00 D Rule Belize 1974 only - Feb 9 0:00 0 S Rule Belize 1982 only - Dec 18 0:00 1:00 D Rule Belize 1983 only - Feb 12 0:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Belize -5:52:48 - LMT 1912 Apr -6:00 Belize C%sT # ZONE-DESCR America Belize Belize All points # Bermuda # 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 # ZONE-DESCR Atlantic Bermuda Bermuda All points # Cayman Is # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown -5:07 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST # ZONE-DESCR America Cayman Cayman_Islands All points # Clipperton # no information # Costa Rica # Shanks gives some very odd dates for 1991, and stops there. # For now, we won't guess further. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule CR 1921 only - Jan 15 0:00 0 S Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S Rule CR 1991 only - Jan 19 0:00 1:00 D Rule CR 1991 only - Jul 1 0:00 0 S # There are too many San Joses elsewhere, so we'll use `Costa Rica'. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose -5:36 - SJMT 1921 Jan 15 # San Jose Mean Time -6:00 CR C%sT # ZONE-DESCR America Costa_Rica Costa_Rica All points # Coco # no information; probably like America/Costa_Rica # Cuba # From Bob Devine (January 28, 1988): # . . .DST is from 2nd Sunday in May to 2nd Sunday in October since 1981. # Change at midnight. In 1979 & 1980, started at 3rd Sunday in March # (I think). # From U. S. Naval Observatory (January 19, 1989): # CUBA 5 H BEHIND UTC # CUBA 4 H BEHIND UTC MAR 20 - OCT 8 # From Shanks (1991): # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Cuba 1925 only - Jul 19 12:00 0 S Rule Cuba 1928 only - Jun 10 0:00 1:00 D Rule Cuba 1928 only - Oct 10 0:00 0 S Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S Rule Cuba 1965 only - Jun 1 0:00 1:00 D Rule Cuba 1965 only - Sep 30 0:00 0 S Rule Cuba 1966 only - May 29 0:00 1:00 D Rule Cuba 1966 only - Oct 2 0:00 0 S Rule Cuba 1967 only - Apr 8 0:00 1:00 D Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S Rule Cuba 1968 only - Apr 14 0:00 1:00 D Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S Rule Cuba 1972 1974 - Oct 8 0:00 0 S Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S Rule Cuba 1978 only - May 7 0:00 1:00 D Rule Cuba 1978 1980 - Oct Sun>=8 0:00 0 S Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D Rule Cuba 1981 max - Oct Sun>=8 0:00 0 S Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D Rule Cuba 1990 only - Apr 1 0:00 1:00 D Rule Cuba 1991 max - Mar Sun>=14 0:00 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Havana -5:29:28 - LMT 1890 -5:30 - HMT 1925 Jul 19 12:00 # Havana MT -5:00 Cuba C%sT # ZONE-DESCR America Havana Cuba All points # Dominica # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau -4:00 - AST # ZONE-DESCR America Dominica Dominica All points # Dominican Republic # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule DR 1933 only - Apr 1 12:00 0 S Rule DR 1966 only - Oct 30 0:00 1:00 D Rule DR 1967 only - Feb 28 0:00 0 S Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD Rule DR 1970 only - Feb 21 0:00 0 S Rule DR 1971 only - Jan 20 0:00 0 S Rule DR 1972 1974 - Jan 21 0:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Santo_Domingo -4:39:36 - LMT 1890 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT -5:00 DR E%sT 1974 Oct 27 -4:00 - AST # ZONE-DESCR America Santo_Domingo Dominican_Republic All points # El Salvador # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Salv 1921 only - Jan 1 0:00 0 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'. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador -6:00 Salv C%sT # ZONE-DESCR America El_Salvador El_Salvador All points # Grenada # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Grenada -4:07:00 - LMT 1911 Jul -4:00 - AST # ZONE-DESCR America Grenada Grenada All points # Guadeloupe # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre -4:00 - AST # ZONE-DESCR America Guadeloupe Guadeloupe All points # Guatemala # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Guat 1918 only - Oct 5 0:00 0 S Rule Guat 1973 only - Nov 25 0:00 1:00 D Rule Guat 1974 only - Feb 24 0:00 0 S Rule Guat 1983 only - May 21 0:00 1:00 D Rule Guat 1983 only - Sep 22 0:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 -6:00 Guat C%sT # ZONE-DESCR America Guatemala Guatemala All points # Haiti # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Haiti 1917 only - Jan 24 12:00 0 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 Rule Haiti 1988 max - Apr Sun>=1 2:00 1:00 D Rule Haiti 1988 max - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Port-au-Prince -4:49:20 - LMT 1890 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT -5:00 Haiti E%sT # ZONE-DESCR America Port-au-Prince Haiti All points # Honduras # Shanks says 1921 Jan 1; go with Whitman's more precise Apr 1. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr -6:00 Salv C%sT # ZONE-DESCR America Tegucigalpa Honduras All points # Jamaica # From Bob Devine (January 28, 1988): # Follows US rules. # From U. S. Naval Observatory (January 19, 1989): # JAMAICA 5 H BEHIND UTC # From Shanks (1991): # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston -5:07 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST 1974 Jan 6 2:00 -5:00 US E%sT # ZONE-DESCR America Jamaica Jamaica All points # 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 -4:00 - AST 1980 Apr 6 -4:00 1:00 ADT 1980 Sep 28 -4:00 - AST # ZONE-DESCR America Martinique Martinique All points # Montserrat # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Plymouth -4:00 - AST # ZONE-DESCR America Montserrat Montserrat All points # Nicaragua # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Nic 1975 only - Feb 16 0:00 0 S Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D Rule Nic 1979 1980 - Jun Mon>=23 0:00 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 -6:00 - CST 1973 May -5:00 - EST 1975 Feb 16 -6:00 Nic C%sT # ZONE-DESCR America Managua Nicaragua All points # Panama # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Panama -5:18:08 - LMT 1890 -5:20 - PMT 1908 Apr 22 # Panama Mean Time -5:00 - EST # ZONE-DESCR America Panama Panama All points # Puerto Rico # There are too many San Juans elsewhere, so we'll use `Puerto_Rico'. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Puerto_Rico -4:24:28 - LMT 1899 Mar 28 12:00 # San Juan -4:00 - AST 1942 May 3 -4:00 1:00 ADT 1945 Sep 30 2:00 -4:00 - AST # ZONE-DESCR America Puerto_Rico United_States Puerto Rico # St Kitts-Nevis # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre -4:00 - AST # ZONE-DESCR America St_Kitts St_Kitts_and_Nevis All points # 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 -4:00 - AST # ZONE-DESCR America St_Lucia St_Lucia All points # St Pierre and Miquelon # There are too many St Pierres elsewhere, so we'll use `Miquelon'. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre -4:00 - AST 1980 May -3:00 Mont SP%sT # ZONE-DESCR America Miquelon France St. Pierre and Miquelon # St Vincent and the Grenadines # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown -4:05 - KMT 1912 # Kingstown Mean Time -4:00 - AST # ZONE-DESCR America St_Vincent St_Vincent All points # Turks and Caicos # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Grand_Turk -4:44:32 - LMT 1890 -5:07 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST 1979 Apr 29 2:00 -5:00 US E%sT # ZONE-DESCR America Grand_Turk Turks_and_Caicos All points # Virgin Is (British and US) # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Virgin -4:19:44 - LMT 1911 Jul # Charlotte Amalie -4:00 - AST # ZONE-DESCR America Virgin United_States US Virgin Islands # ZONE-DESCR America Virgin United_Kingdom British Virgin Islands