diff options
Diffstat (limited to 'time/southamerica')
| -rw-r--r-- | time/southamerica | 217 |
1 files changed, 176 insertions, 41 deletions
diff --git a/time/southamerica b/time/southamerica index cd8c84ec6f..1fdde5ebe5 100644 --- a/time/southamerica +++ b/time/southamerica @@ -1,14 +1,22 @@ -# @(#)southamerica 7.14 +# @(#)southamerica 7.15 # 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> (1996-09-03): +# 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). -# Except where otherwise noted, it is the source for the data below. +# +# 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! @@ -103,11 +111,64 @@ Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S # 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] @@ -132,38 +193,55 @@ Zone America/La_Paz -4:32:36 - LMT 1890 # "[America/Porto_Acre]" is for the Territory of Acre; # "[America/Noronha]" is for Fernando De Noronha. -# From Bob Devine (1988-01-28): -# The only information I found is that there was no DST up to 1985. -# But there was some before 1952! - -# From U. S. Naval Observatory (1989-01-16): -# BRAZIL WEST 5 H BEHIND UTC TERRITORY OF ACRE -# BRAZIL WEST 4 H BEHIND UTC ACRE OCT 23, '88-FEB 11, -# BRAZIL '89 (ESTIMATED) -# BRAZIL CENTRAL 4 H BEHIND UTC MANAUS -# BRAZIL CENTRAL 3 H BEHIND UTC MANAUS OCT 23, '88-FEB 11, -# BRAZIL CENTRAL '89 (ESTIMATED) -# BRAZIL EAST 3 H BEHIND UTC COASTAL STATES, RIO, SAO -# BRAZIL EAST PAULO, BRASILIA -# BRAZIL EAST 2 H BEHIND UTC COASTAL STATES, RIO, SAO -# BRAZIL PAULO, BRASILIA OCT 23, -# BRAZIL '88-FEB 11, '89 -# BRAZIL (ESTIMATED) -# BRAZIL 2 H BEHIND UTC ATLANTIC ISLANDS, FERNANDO -# BRAZIL DE NORONHA -# BRAZIL 1 H BEHIND UTC OCT 23, '88-FEB 11, '89 -# BRAZIL (ESTIMATED) -# BRAZIL 3 H BEHIND UTC FOR MOST MAJOR AIRPORTS. - # 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. -# Shanks claims Acre stopped observing DST after 1988 Feb 7, but it -# could just be that his table ran out of room. We're extrapolating -# about time zone changes after 1990 Feb 11. + +# 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. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Brazil 1931 only - Oct 3 11:00 1:00 D @@ -185,21 +263,59 @@ 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 max - Oct Sun>=15 0:00 1:00 D -Rule Brazil 1990 max - Feb Sun>=8 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 max - 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 + # 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 + -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 -Zone America/Manaus -4:00:04 - LMT 1914 +# +# 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 + -5:00 Brazil A%sT 1988 Jul + -5:00 - AST # # Martin Vaz and Trinidade are like America/Noronha. @@ -217,6 +333,8 @@ 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 @@ -233,10 +351,13 @@ Zone Pacific/Easter -7:17:28 - LMT 1890 # Mataveri # 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 - COT # Colombia Time + -5:00 CO CO%sT # Colombia Time # Malpelo, Providencia, San Andres # no information; probably like America/Bogota @@ -265,8 +386,9 @@ 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 max - Sep Sun>=9 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 @@ -285,8 +407,9 @@ Zone America/Cayenne -3:29:20 - LMT 1911 Jul 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 - + -3:00 - GYT 1991 +# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch. + -4:00 - GYT # Paraguay @@ -303,10 +426,17 @@ Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown 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 max - Apr 1 0:00 0 - +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 max - Oct 1 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 max - 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 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Asuncion -3:50:40 - LMT 1890 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time @@ -324,6 +454,8 @@ 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 @@ -396,7 +528,10 @@ 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 only - Mar 4 0:00 0 - +Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 - +Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S +Rule Uruguay 1992 1993 - Oct Sun>=15 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 |