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Diffstat (limited to 'timezone/southamerica')
| -rw-r--r-- | timezone/southamerica | 555 |
1 files changed, 555 insertions, 0 deletions
diff --git a/timezone/southamerica b/timezone/southamerica new file mode 100644 index 0000000000..f53355c4c0 --- /dev/null +++ b/timezone/southamerica @@ -0,0 +1,555 @@ +# @(#)southamerica 7.22 + +# 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> (1996-11-22): +# 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). +# +# Gwillim Law <LAW@encmail.encompass.com> 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. +# +# The following abbreviations are used in this file. +# Corrections are welcome! +# std dst +# LMT Local Mean Time +# -2:00 FST FDT Fernando de Noronha +# -3:00 EST EDT Eastern Brazil +# -4:00 WST WDT Western Brazil +# -4:00 AST ADT Atlantic +# -5:00 AST ADT Acre +# +# Earlier editions of these tables used the North American style (e.g. ARST and +# ARDT for Argentine Standard and Daylight Time), but the following quote +# suggests that it's better to use European style (e.g. ART and ARST). +# I suggest the use of _Summer time_ instead of the more cumbersome +# _daylight-saving time_. _Summer time_ seems to be in general use +# in Europe and South America. +# -- E O Cutler, _New York Times_ (1937-02-14), quoted in +# H L Mencken, _The American Language: Supplement I_ (1960), p 466 + + +# From Guy Harris: +# From Official Airline Guide - Worldwide Edition (1987). Countries not +# listed here do not observe DST, according to the OAG. Time zone names +# are pure inventions, and none are supplied for countries not observing +# DST; updates from natives would be appreciated. The times that DST +# starts and ends are based on the assumption that they switch a 2AM just +# as everybody else does. + +############################################################################### + +############################################################################### + +# Argentina + +# From Bob Devine (1988-01-28): +# Argentina: first Sunday in October to first Sunday in April since 1976. +# Double Summer time from 1969 to 1974. Switches at midnight. + +# From U. S. Naval Observatory (1988-01-199): +# ARGENTINA 3 H BEHIND UTC + +# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): +# I am sending modifications to the Argentine time zone table... +# AR was chosen because they are the ISO letters that represent Argentina. + +# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S +Rule Arg 1930 only - Dec 1 0:00 1:00 S +Rule Arg 1931 only - Apr 1 0:00 0 - +Rule Arg 1931 only - Oct 15 0:00 1:00 S +Rule Arg 1932 1940 - Mar 1 0:00 0 - +Rule Arg 1932 1939 - Nov 1 0:00 1:00 S +Rule Arg 1940 only - Jul 1 0:00 1:00 S +Rule Arg 1941 only - Jun 15 0:00 0 - +Rule Arg 1941 only - Oct 15 0:00 1:00 S +Rule Arg 1943 only - Aug 1 0:00 0 - +Rule Arg 1943 only - Oct 15 0:00 1:00 S +Rule Arg 1946 only - Mar 1 0:00 0 - +Rule Arg 1946 only - Oct 1 0:00 1:00 S +Rule Arg 1963 only - Oct 1 0:00 0 - +Rule Arg 1963 only - Dec 15 0:00 1:00 S +Rule Arg 1964 1966 - Mar 1 0:00 0 - +Rule Arg 1964 1966 - Oct 15 0:00 1:00 S +Rule Arg 1967 only - Apr 1 0:00 0 - +Rule Arg 1967 1968 - Oct Sun<=7 0:00 1:00 S +Rule Arg 1968 1969 - Apr Sun<=7 0:00 0 - +Rule Arg 1974 only - Jan 23 0:00 1:00 S +Rule Arg 1974 only - May 1 0:00 0 - +Rule Arg 1974 1976 - Oct Sun<=7 0:00 1:00 S +Rule Arg 1975 1977 - Apr Sun<=7 0:00 0 - +Rule Arg 1985 only - Nov 2 0:00 1:00 S +Rule Arg 1986 only - Mar 14 0:00 0 - +Rule Arg 1986 1987 - Oct 25 0:00 1:00 S +Rule Arg 1987 only - Feb 13 0:00 0 - +Rule Arg 1988 only - Feb 7 0:00 0 - +Rule Arg 1988 only - Dec 1 0:00 1:00 S +# +# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): +# These corrections were contributed by InterSoft Argentina S.A., +# obtaining the data from the: +# Talleres de Hidrografia Naval Argentina +# (Argentine Naval Hydrography Institute) +# +# Shanks gives 1989 Mar 16 and stops after 1990 Mar 4; go with Otero. +Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 - +Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S +# +# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): +# From this moment on, the law that mandated the daylight saving +# time corrections was derogated and no more modifications +# to the time zones (for daylight saving) are now made. +# +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +# +# Buenos Aires (BA), Distrito Federal (DF), Santa Cruz (SC), +# Tierra del Fuego (TF) & Antartida e Islas +Zone America/Buenos_Aires -3:53:48 - LMT 1894 Nov + -4:16:44 - CMT 1920 May # Cordoba Mean Time + -4:00 - ART 1930 Dec + -4:00 Arg AR%sT 1969 Oct 5 + -3:00 Arg AR%sT +# +# Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC), +# Formosa (FM), La Pampa (LP), Chubut (CH) +Zone America/Rosario -4:02:40 - LMT 1894 Nov + -4:16:44 - CMT 1920 May + -4:00 - ART 1930 Dec + -4:00 Arg AR%sT 1969 Oct 5 + -3:00 Arg AR%sT 1991 Jul + -3:00 - ART +# +# Cordoba (CB), Santiago del Estero (SE), Salta (SA), Tucuman (TM), La Rioja (LR), San Juan (SJ), San Luis (SL), +# Neuquen (NQ), Rio Negro (RN) +Zone America/Cordoba -4:16:44 - LMT 1894 Nov + -4:16:44 - CMT 1920 May + -4:00 - ART 1930 Dec + -4:00 Arg AR%sT 1969 Oct 5 + -3:00 Arg AR%sT 1990 Jul + -3:00 - ART +# +# Jujuy (JY) +Zone America/Jujuy -4:21:12 - LMT 1894 Nov + -4:16:44 - CMT 1920 May + -4:00 - ART 1930 Dec + -4:00 Arg AR%sT 1969 Oct 5 + -3:00 Arg AR%sT 1991 Mar 3 + -4:00 - WART 1991 Oct 6 + -4:00 1:00 WARST 1992 Mar 15 + -4:00 - WART 1992 Oct 18 + -3:00 - ART +# +# Catamarca (CT) +Zone America/Catamarca -4:23:08 - LMT 1894 Nov + -4:16:44 - CMT 1920 May + -4:00 - ART 1930 Dec + -4:00 Arg AR%sT 1969 Oct 5 + -3:00 Arg AR%sT 1990 Jul + -3:00 - ART 1991 Jul + -3:00 Arg AR%sT 1992 Jul + -3:00 - ART +# +# Mendoza (MZ) +Zone America/Mendoza -4:35:16 - LMT 1894 Nov + -4:16:44 - CMT 1920 May + -4:00 - ART 1930 Dec + -4:00 Arg AR%sT 1969 Oct 5 + -3:00 Arg AR%sT 1991 Mar 3 + -4:00 - WART 1991 Oct 15 + -4:00 1:00 WARST 1992 Mar 1 + -4:00 - WART 1992 Oct 18 + -3:00 - ART + +# Aruba +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad + -4:30 - ANT 1965 # Netherlands Antilles Time + -4:00 - AST + +# Bolivia +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone America/La_Paz -4:32:36 - LMT 1890 + -4:32:36 - LPMT 1931 Oct 15 # La Paz Mean Time + -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST + -4:00 - BOT # Bolivia Time + +# Brazil + +# From Guy Harris: +# The OAG lists 1987-10-25 and 1988-02-12 as the starting and +# ending dates, giving them as "estimated date(s) based on previous year". We +# infer a rule here from one example, always a dangerous practice.... Yes, +# they really do switch on Saturday, according to the OAG. +# "[America/Porto_Acre]" is for the [State] of Acre; +# "[America/Noronha]" is for Fernando De Noronha. + +# From Paul Eggert <eggert@twinsun.com> (1993-11-18): +# The mayor of Rio recently attempted to change the time zone rules +# just in his city, in order to leave more summer time for the tourist trade. +# The rule change lasted only part of the day; +# the federal government refused to follow the city's rules, and business +# was in a chaos, so the mayor backed down that afternoon. + +# From IATA SSIM (1996-02): +# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), +# Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ), +# Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO), +# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. +# [The last three states are new to this issue of the IATA SSIM.] + +# From Gwillim Law (1996-10-07): +# Geography, history (Tocantins was part of Goias until 1989), and other +# sources of time zone information lead me to believe that AL, SE, and TO were +# always in BR1, and so the only change was whether or not they observed DST.... +# The earliest issue of the SSIM I have is 2/91. Each issue from then until +# 9/95 says that DST is observed only in the ten states I quoted from 9/95, +# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 +# (UTC-4).... The other two time zones given for Brazil are BR3, which is +# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is +# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's +# become part of the state of Pernambuco). The boundary between BR1 and BR2 +# has never been clearly stated. They've simply been called East and West. +# However, some conclusions can be drawn from another IATA manual: the Airline +# Coding Directory, which lists close to 400 airports in Brazil. For each +# airport it gives a time zone which is coded to the SSIM. From that +# information, I'm led to conclude that the states of Amapa (AP), Ceara (CE), +# Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do +# Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST. + +# From Paul Eggert (1996-11-22): +# Let's make the following assumptions: +# +# * All data in Shanks are correct through 1990. In particular, +# Shanks was right when he said Acre stopped observing DST in mid-1988. +# * Areas where Shanks reports DST up to 1990, but the IATA reports no DST +# in 1995, stopped observing DST in mid-1990. +# +# Under these assumptions Brazil needs 7 entries to cover all the distinct +# time zone histories since 1970: +# +# Noronha (UTC-2), Fortaleza (UTC-3), and Manaus (UTC-4) stopped observing DST +# in mid-1990. +# Maceio (UTC-3) stopped observing DST in mid-1990, but started again mid-1995. +# Sao Paulo (UTC-3) and Cuiaba (UTC-4) always observed DST. +# Porto Acre (UTC-5) stopped observing DST in mid-1988. + +# From Rodrigo Feher <feher@pobox.com> (1998-01-17): +# Reading "southamerica" file in timezone 7.55 I've found an +# error. Line 193 say "Territory of Acre". It is not a territory anymore +# but a state. + +# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S +Rule Brazil 1931 only - Oct 3 11:00 1:00 D +Rule Brazil 1932 1933 - Apr 1 0:00 0 S +Rule Brazil 1932 only - Oct 3 0:00 1:00 D +Rule Brazil 1949 1952 - Dec 1 0:00 1:00 D +Rule Brazil 1950 only - Apr 16 0:00 0 S +Rule Brazil 1951 1953 - Apr 1 0:00 0 S +Rule Brazil 1963 only - Dec 9 0:00 1:00 D +Rule Brazil 1964 only - Mar 1 0:00 0 S +Rule Brazil 1965 only - Jan 31 0:00 1:00 D +Rule Brazil 1965 only - Apr 1 0:00 0 S +Rule Brazil 1965 only - Dec 1 0:00 1:00 D +Rule Brazil 1966 1968 - Mar 1 0:00 0 S +Rule Brazil 1966 1967 - Nov 1 0:00 1:00 D +Rule Brazil 1985 only - Nov 2 0:00 1:00 D +Rule Brazil 1986 only - Mar 15 0:00 0 S +Rule Brazil 1986 1987 - Oct Sat<=28 0:00 1:00 D +Rule Brazil 1987 only - Feb 14 0:00 0 S +Rule Brazil 1988 only - Feb 7 0:00 0 S +Rule Brazil 1989 only - Jan 22 0:00 0 S +Rule Brazil 1988 1989 - Oct Sun>=10 0:00 1:00 D +Rule Brazil 1990 1991 - Feb Sun>=11 0:00 0 S +Rule Brazil 1990 1992 - Oct Sun>=20 0:00 1:00 D +Rule Brazil 1992 only - Feb 9 0:00 0 S +Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 D +Rule Brazil 1993 only - Jan 31 0:00 0 S +Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 S +Rule Brazil 1996 max - Feb Sun>=11 0:00 0 S +Rule Brazil 1996 max - Oct Sun>=1 0:00 1:00 D + +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +# +# Fernando de Noronha +Zone America/Noronha -2:09:40 - LMT 1914 + -2:00 - FST 1963 Dec 9 + -2:00 Brazil F%sT 1990 Jul + -2:00 - FST +# +# Amapa, east Para, Maranhao, Piaui, Ceara, Rio Grande do Norte, Paraiba, +# Pernambuco (except Fernando de Noronha) +Zone America/Fortaleza -2:34:00 - LMT 1914 + -3:00 - EST 1963 Dec 9 + -3:00 Brazil E%sT 1990 Jul + -3:00 - EST +# +# Alagoas, Sergipe, Tocantins +Zone America/Maceio -2:22:52 - LMT 1914 + -3:00 - EST 1963 Dec 9 + -3:00 Brazil E%sT 1990 Jul + -3:00 - EST 1995 Jul + -3:00 Brazil E%sT +# +# Bahia, Goias, Distrito Federal, Minas Gerais, Espirito Santo, Rio de Janeiro, +# Sao Paulo, Parana, Santa Catarina, Rio Grande do Sul +Zone America/Sao_Paulo -3:06:28 - LMT 1914 + -3:00 Brazil E%sT +# +# Mato Grosso, Mato Grosso do Sul +Zone America/Cuiaba -3:44:20 - LMT 1914 + -4:00 - WST 1963 Dec 9 + -4:00 Brazil W%sT +# +# Roraima, west Para, Amazonas, Rondonia +Zone America/Manaus -4:00:04 - LMT 1914 + -4:00 - WST 1963 Dec 9 + -4:00 Brazil W%sT 1990 Jul + -4:00 - WST +# +# Acre +# Rio_Branco is too ambiguous, since there's a Rio Branco in Uruguay too. +Zone America/Porto_Acre -4:31:12 - LMT 1914 + -5:00 - AST 1963 Dec 9 + -5:00 Brazil A%sT 1988 Jul + -5:00 - AST +# +# Martin Vaz and Trinidade are like America/Noronha. + + +# Chile + +# From Eduardo Krell (1995-10-19): +# The law says to switch to DST at midnight [24:00] on the second SATURDAY +# of October.... The law is the same for March and October. + +# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S +Rule Chile 1918 only - Sep 1 0:00 1:00 S +Rule Chile 1919 only - Jul 2 0:00 0 - +Rule Chile 1927 1931 - Sep 1 0:00 1:00 S +Rule Chile 1928 1932 - Apr 1 0:00 0 - +Rule Chile 1969 max - Oct Sun>=9 0:00 1:00 S +Rule Chile 1970 max - Mar Sun>=9 0:00 0 - +# IATA SSIM anomalies: (1990-09) says 1990-09-16; (1992-02) says 1992-03-14; +# (1996-09) says 1998-03-08. Ignore these for now. +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone America/Santiago -4:42:40 - LMT 1890 + -4:42:40 - SMT 1910 # Santiago Mean Time + -5:00 Chile CL%sT 1932 Sep # Chile Time + -4:00 Chile CL%sT +Zone Pacific/Easter -7:17:28 - LMT 1890 # Mataveri + -7:17:28 - MMT 1932 Sep # Mataveri Mean Time + -7:00 Chile EAS%sT 1982 Mar 14 # Easter I Time + -6:00 Chile EAS%sT +# +# Whitman says Juan Fernandez Is are like America/Santiago. +# San Ambrosio, San Felix +# no information; probably like America/Santiago + + +# Colombia +# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S +Rule CO 1992 only - May 2 0:00 1:00 S +Rule CO 1992 only - Dec 31 0:00 0 - +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone America/Bogota -4:56:20 - LMT 1884 Mar 13 + -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time + -5:00 CO CO%sT # Colombia Time +# Malpelo, Providencia, San Andres +# no information; probably like America/Bogota + +# Curacao +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad + -4:30 - ANT 1965 # Netherlands Antilles Time + -4:00 - AST + +# Ecuador +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone America/Guayaquil -5:19:20 - LMT 1890 + -5:14:00 - QMT 1931 # Quito Mean Time + -5:00 - ECT # Ecuador Time +Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno + -5:00 - ECT 1986 + -6:00 - GALT # Galapagos Time + +# Falklands +# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S +Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S +Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 - +Rule Falk 1939 only - Oct 1 0:00 1:00 S +Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S +Rule Falk 1943 only - Jan 1 0:00 0 - +Rule Falk 1983 only - Sep lastSun 0:00 1:00 S +Rule Falk 1984 1985 - Apr lastSun 0:00 0 - +Rule Falk 1984 only - Sep 16 0:00 1:00 S +Rule Falk 1985 1995 - Sep Sun>=9 0:00 1:00 S +Rule Falk 1986 max - Apr Sun>=16 0:00 0 - +Rule Falk 1996 max - Sep Sun>=8 0:00 1:00 S +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone Atlantic/Stanley -3:51:24 - LMT 1890 + -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time + -4:00 Falk FK%sT 1983 May # Falkland Is Time + -3:00 Falk FK%sT 1985 Sep 15 + -4:00 Falk FK%sT + +# French Guiana +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone America/Cayenne -3:29:20 - LMT 1911 Jul + -4:00 - GFT 1967 Oct # French Guiana Time + -3:00 - GFT + +# Guyana +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown + -3:45 - GBGT 1966 May 26 # Br Guiana Time + -3:45 - GYT 1975 Jul 31 # Guyana Time + -3:00 - GYT 1991 +# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch. + -4:00 - GYT + +# Paraguay + +# From Bob Devine (1988-01-28): +# Paraguay: First day in October to last in March. Midnight switch?? +# Since 1980. + +# From U. S. Naval Observatory (1989-01-19): +# PARAGUAY 4 H BEHIND UTC +# PARAGUAY 3 H BEHIND UTC OCT 1, '88-MAR 31, '89 + +# From Shanks (1991): +# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S +Rule Para 1975 1978 - Oct 1 0:00 1:00 S +Rule Para 1975 1978 - Mar 1 0:00 0 - +# Shanks says 1979 was all DST. +Rule Para 1980 1991 - Apr 1 0:00 0 - +Rule Para 1980 1988 - Oct 1 0:00 1:00 S +Rule Para 1989 only - Oct 22 0:00 1:00 S +Rule Para 1990 only - Oct 1 0:00 1:00 S +Rule Para 1991 only - Oct 6 0:00 1:00 S +Rule Para 1992 only - Mar 1 0:00 0 - +Rule Para 1992 only - Oct 5 0:00 1:00 S +Rule Para 1993 only - Mar 31 0:00 0 - +Rule Para 1993 1995 - Oct 1 0:00 1:00 S +Rule Para 1994 1995 - Feb lastSun 0:00 0 - +Rule Para 1996 max - Mar 1 0:00 0 - +Rule Para 1996 only - Oct 6 0:00 1:00 S +Rule Para 1997 max - Oct 1 0:00 1:00 S +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone America/Asuncion -3:50:40 - LMT 1890 + -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time + -4:00 - PYT 1972 Oct # Paraguay Time + -3:00 - PYT 1974 Apr + -4:00 Para PY%sT + +# Peru +# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S +Rule Peru 1938 only - Jan 1 0:00 1:00 S +Rule Peru 1938 only - Apr 1 0:00 0 - +Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S +Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 - +Rule Peru 1987 only - Jan 1 0:00 1:00 S +Rule Peru 1987 only - Apr 1 0:00 0 - +Rule Peru 1990 only - Jan 1 0:00 1:00 S +Rule Peru 1990 only - Apr 1 0:00 0 - +Rule Peru 1993 only - Jan 1 0:00 1:00 S +Rule Peru 1993 only - Apr 1 0:00 0 - +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone America/Lima -5:08:12 - LMT 1890 + -5:09 - LMT 1908 Jul 28 # Lima Mean Time + -5:00 Peru PE%sT # Peru Time + +# South Georgia +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken + -2:00 - GST # South Georgia Time + +# South Sandwich Is +# uninhabited + +# Suriname +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone America/Paramaribo -3:40:40 - LMT 1911 + -3:40:52 - PMT 1935 # Paramaribo Mean Time + -3:40:36 - PMT 1945 Oct # The capital moved? + -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time + -3:30 - SRT 1984 Oct # Suriname Time + -3:00 - SRT + +# Trinidad and Tobago +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2 + -4:00 - AST + +# Uruguay +# From Paul Eggert <eggert@twinsun.com> (1993-11-18): +# Uruguay wins the prize for the strangest peacetime manipulation of the rules. +# From Shanks (1991): +# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S +# Whitman gives 1923 Oct 1; go with Shanks. +Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS +Rule Uruguay 1924 1926 - Apr 1 0:00 0 - +Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS +Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS +# Shanks gives 1935 Apr 1 0:00 and 1936 Mar 30 0:00; go with Whitman. +Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 - +Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS +Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 - +# Whitman gives 1937 Oct 3; go with Shanks. +Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS +# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13, +# and 1943 Apr 13 ``to present time''; go with Shanks. +Rule Uruguay 1941 only - Aug 1 0:00 0 - +Rule Uruguay 1942 only - Jan 1 0:00 0:30 HS +Rule Uruguay 1942 only - Dec 14 0:00 1:00 S +Rule Uruguay 1943 only - Mar 14 0:00 0 - +Rule Uruguay 1959 only - May 24 0:00 1:00 S +Rule Uruguay 1959 only - Nov 15 0:00 0 - +Rule Uruguay 1960 only - Jan 17 0:00 1:00 S +Rule Uruguay 1960 only - Mar 6 0:00 0 - +Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S +Rule Uruguay 1965 only - Sep 26 0:00 0 - +Rule Uruguay 1966 1967 - Oct 31 0:00 0 - +Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS +Rule Uruguay 1968 1970 - Dec 2 0:00 0 - +Rule Uruguay 1972 only - Apr 24 0:00 1:00 S +Rule Uruguay 1972 only - Aug 15 0:00 0 - +Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS +Rule Uruguay 1974 only - Dec 22 0:00 1:00 S +Rule Uruguay 1976 only - Oct 1 0:00 0 - +Rule Uruguay 1977 only - Dec 4 0:00 1:00 S +Rule Uruguay 1978 only - Apr 1 0:00 0 - +Rule Uruguay 1979 only - Oct 1 0:00 1:00 S +Rule Uruguay 1980 only - May 1 0:00 0 - +Rule Uruguay 1987 only - Dec 14 0:00 1:00 S +Rule Uruguay 1988 only - Mar 14 0:00 0 - +Rule Uruguay 1988 only - Dec 11 0:00 1:00 S +Rule Uruguay 1989 only - Mar 12 0:00 0 - +Rule Uruguay 1989 only - Oct 29 0:00 1:00 S +Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 - +Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S +# Shanks's 4th edition (1995) says no DST was observed in 1990/1 and 1991/2, +# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA. +Rule Uruguay 1992 only - Oct 18 0:00 1:00 S +Rule Uruguay 1993 only - Feb 28 0:00 0 - +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 + -3:44:44 - MMT 1920 May 1 # Montevideo MT + -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time + -3:00 Uruguay UY%sT + +# Venezuela +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone America/Caracas -4:27:44 - LMT 1890 + -4:27:44 - CMT 1912 Feb 12 # Caracas Mean Time + -4:30 - VET 1965 # Venezuela Time + -4:00 - VET |