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-rw-r--r--share/zoneinfo/southamerica217
1 files changed, 176 insertions, 41 deletions
diff --git a/share/zoneinfo/southamerica b/share/zoneinfo/southamerica
index cd8c84ec6fed..1fdde5ebe559 100644
--- a/share/zoneinfo/southamerica
+++ b/share/zoneinfo/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