southamerica revision 21217
1240116Smarcel# @(#)southamerica 7.16 2240116Smarcel 3240116Smarcel# This data is by no means authoritative; if you think you know better, 4240116Smarcel# go ahead and edit the file (and please send any changes to 5240116Smarcel# tz@elsie.nci.nih.gov for general use in the future). 6240116Smarcel 7240116Smarcel# From Paul Eggert <eggert@twinsun.com> (1996-11-22): 8240116Smarcel# A good source for time zone historical data outside the U.S. is 9240116Smarcel# Thomas G. Shanks, The International Atlas (3rd edition), 10240116Smarcel# San Diego: ACS Publications, Inc. (1991). 11240116Smarcel# 12240116Smarcel# Gwillim Law <LAW@encmail.encompass.com> writes that a good source 13240116Smarcel# for recent time zone data is the International Air Transport 14240116Smarcel# Association's Standard Schedules Information Manual (IATA SSIM), 15240116Smarcel# published semiannually. Law sent in several helpful summaries 16240116Smarcel# of the IATA's data after 1990. 17240116Smarcel# 18240116Smarcel# Except where otherwise noted, Shanks is the source for entries through 1990, 19240116Smarcel# and IATA SSIM is the source for entries after 1990. 20240116Smarcel# 21240116Smarcel# The following abbreviations are used in this file. 22240116Smarcel# Corrections are welcome! 23240116Smarcel# std dst 24240116Smarcel# LMT Local Mean Time 25240116Smarcel# -2:00 FST FDT Fernando de Noronha 26240116Smarcel# -3:00 EST EDT Eastern Brazil 27240116Smarcel# -4:00 WST WDT Western Brazil 28240116Smarcel# -4:00 AST ADT Atlantic 29240116Smarcel# -5:00 AST ADT Acre 30240116Smarcel# 31240116Smarcel# See the `africa' file for time zone naming and abbreviation conventions. 32240116Smarcel# Earlier editions of these tables used the North American style (e.g. ARST and 33240116Smarcel# ARDT for Argentine Standard and Daylight Time), but the following quote 34240116Smarcel# suggests that it's better to use European style (e.g. ART and ARST). 35240116Smarcel# I suggest the use of _Summer time_ instead of the more cumbersome 36240116Smarcel# _daylight-saving time_. _Summer time_ seems to be in general use 37240116Smarcel# in Europe and South America. 38240116Smarcel# -- E O Cutler, _New York Times_ (1937-02-14), quoted in 39240116Smarcel# H L Mencken, _The American Language: Supplement I_ (1960), p 466 40240116Smarcel 41240116Smarcel 42240116Smarcel# From Guy Harris: 43240116Smarcel# From Official Airline Guide - Worldwide Edition (1987). Countries not 44240116Smarcel# listed here do not observe DST, according to the OAG. Time zone names 45240116Smarcel# are pure inventions, and none are supplied for countries not observing 46240116Smarcel# DST; updates from natives would be appreciated. The times that DST 47240116Smarcel# starts and ends are based on the assumption that they switch a 2AM just 48240116Smarcel# as everybody else does. 49240116Smarcel 50240116Smarcel############################################################################### 51240116Smarcel 52240116Smarcel############################################################################### 53240116Smarcel 54240116Smarcel# Argentina 55240116Smarcel 56240116Smarcel# From Bob Devine (1988-01-28): 57240116Smarcel# Argentina: first Sunday in October to first Sunday in April since 1976. 58240116Smarcel# Double Summer time from 1969 to 1974. Switches at midnight. 59240116Smarcel 60240116Smarcel# From U. S. Naval Observatory (1988-01-199): 61240116Smarcel# ARGENTINA 3 H BEHIND UTC 62240116Smarcel 63240116Smarcel# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): 64240116Smarcel# I am sending modifications to the Argentine time zone table... 65240116Smarcel# AR was chosen because they are the ISO letters that represent Argentina. 66240116Smarcel 67240116Smarcel# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 68240116SmarcelRule Arg 1930 only - Dec 1 0:00 1:00 S 69240116SmarcelRule Arg 1931 only - Apr 1 0:00 0 - 70240116SmarcelRule Arg 1931 only - Oct 15 0:00 1:00 S 71240116SmarcelRule Arg 1932 1940 - Mar 1 0:00 0 - 72240116SmarcelRule Arg 1932 1939 - Nov 1 0:00 1:00 S 73240116SmarcelRule Arg 1940 only - Jul 1 0:00 1:00 S 74240116SmarcelRule Arg 1941 only - Jun 15 0:00 0 - 75240116SmarcelRule Arg 1941 only - Oct 15 0:00 1:00 S 76240116SmarcelRule Arg 1943 only - Aug 1 0:00 0 - 77240116SmarcelRule Arg 1943 only - Oct 15 0:00 1:00 S 78240116SmarcelRule Arg 1946 only - Mar 1 0:00 0 - 79240116SmarcelRule Arg 1946 only - Oct 1 0:00 1:00 S 80240116SmarcelRule Arg 1963 only - Oct 1 0:00 0 - 81240116SmarcelRule Arg 1963 only - Dec 15 0:00 1:00 S 82240116SmarcelRule Arg 1964 1966 - Mar 1 0:00 0 - 83240116SmarcelRule Arg 1964 1966 - Oct 15 0:00 1:00 S 84240116SmarcelRule Arg 1967 only - Apr 1 0:00 0 - 85240116SmarcelRule Arg 1967 1968 - Oct Sun<=7 0:00 1:00 S 86240116SmarcelRule Arg 1968 1969 - Apr Sun<=7 0:00 0 - 87240116SmarcelRule Arg 1974 only - Jan 23 0:00 1:00 S 88240116SmarcelRule Arg 1974 only - May 1 0:00 0 - 89240116SmarcelRule Arg 1974 1976 - Oct Sun<=7 0:00 1:00 S 90240116SmarcelRule Arg 1975 1977 - Apr Sun<=7 0:00 0 - 91240116SmarcelRule Arg 1985 only - Nov 2 0:00 1:00 S 92240116SmarcelRule Arg 1986 only - Mar 14 0:00 0 - 93240116SmarcelRule Arg 1986 1987 - Oct 25 0:00 1:00 S 94240116SmarcelRule Arg 1987 only - Feb 13 0:00 0 - 95240116SmarcelRule Arg 1988 only - Feb 7 0:00 0 - 96240116SmarcelRule Arg 1988 only - Dec 1 0:00 1:00 S 97240116Smarcel# 98240116Smarcel# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): 99240116Smarcel# These corrections were contributed by InterSoft Argentina S.A., 100240116Smarcel# obtaining the data from the: 101240116Smarcel# Talleres de Hidrografia Naval Argentina 102240116Smarcel# (Argentine Naval Hydrography Institute) 103240116Smarcel# 104240116Smarcel# Shanks gives 1989 Mar 16 and stops after 1990 Mar 4; go with Otero. 105240116SmarcelRule Arg 1989 1993 - Mar Sun>=1 0:00 0 - 106240116SmarcelRule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S 107240116Smarcel# 108240116Smarcel# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): 109240116Smarcel# From this moment on, the law that mandated the daylight saving 110240116Smarcel# time corrections was derogated and no more modifications 111240116Smarcel# to the time zones (for daylight saving) are now made. 112240116Smarcel# 113240116Smarcel# Zone NAME GMTOFF RULES FORMAT [UNTIL] 114240116Smarcel# 115240116Smarcel# Buenos Aires (BA), Distrito Federal (DF), Santa Cruz (SC), 116240116Smarcel# Tierra del Fuego (TF) & Antartida e Islas 117240116SmarcelZone America/Buenos_Aires -3:53:48 - LMT 1894 Nov 118240116Smarcel -4:16:44 - CMT 1920 May # Cordoba Mean Time 119240116Smarcel -4:00 - ART 1930 Dec 120240116Smarcel -4:00 Arg AR%sT 1969 Oct 5 121240116Smarcel -3:00 Arg AR%sT 122240116Smarcel# 123240116Smarcel# Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC), 124240116Smarcel# Formosa (FM), La Pampa (LP), Chubut (CH) 125240116SmarcelZone America/Rosario -4:02:40 - LMT 1894 Nov 126240116Smarcel -4:16:44 - CMT 1920 May 127240116Smarcel -4:00 - ART 1930 Dec 128240116Smarcel -4:00 Arg AR%sT 1969 Oct 5 129240116Smarcel -3:00 Arg AR%sT 1991 Jul 130240116Smarcel -3:00 - ART 131240116Smarcel# 132240116Smarcel# Cordoba (CB), Santiago del Estero (SE), Salta (SA), Tucuman (TM), La Rioja (LR), San Juan (SJ), San Luis (SL), 133240116Smarcel# Neuquen (NQ), Rio Negro (RN) 134240116SmarcelZone America/Cordoba -4:16:44 - LMT 1894 Nov 135240116Smarcel -4:16:44 - CMT 1920 May 136240116Smarcel -4:00 - ART 1930 Dec 137240116Smarcel -4:00 Arg AR%sT 1969 Oct 5 138240116Smarcel -3:00 Arg AR%sT 1990 Jul 139240116Smarcel -3:00 - ART 140240116Smarcel# 141240116Smarcel# Jujuy (JY) 142240116SmarcelZone America/Jujuy -4:21:12 - LMT 1894 Nov 143240116Smarcel -4:16:44 - CMT 1920 May 144240116Smarcel -4:00 - ART 1930 Dec 145240116Smarcel -4:00 Arg AR%sT 1969 Oct 5 146240116Smarcel -3:00 Arg AR%sT 1991 Mar 3 147240116Smarcel -4:00 - WART 1991 Oct 6 148240116Smarcel -4:00 1:00 WARST 1992 Mar 15 149240116Smarcel -4:00 - WART 1992 Oct 18 150240116Smarcel -3:00 - ART 151240116Smarcel# 152240116Smarcel# Catamarca (CT) 153240116SmarcelZone America/Catamarca -4:23:08 - LMT 1894 Nov 154240116Smarcel -4:16:44 - CMT 1920 May 155240116Smarcel -4:00 - ART 1930 Dec 156240116Smarcel -4:00 Arg AR%sT 1969 Oct 5 157240116Smarcel -3:00 Arg AR%sT 1990 Jul 158240116Smarcel -3:00 - ART 1991 Jul 159240116Smarcel -3:00 Arg AR%sT 1992 Jul 160240116Smarcel -3:00 - ART 161240116Smarcel# 162240116Smarcel# Mendoza (MZ) 163240116SmarcelZone America/Mendoza -4:35:16 - LMT 1894 Nov 164240116Smarcel -4:16:44 - CMT 1920 May 165240116Smarcel -4:00 - ART 1930 Dec 166240116Smarcel -4:00 Arg AR%sT 1969 Oct 5 167240116Smarcel -3:00 Arg AR%sT 1991 Mar 3 168240116Smarcel -4:00 - WART 1991 Oct 15 169240116Smarcel -4:00 1:00 WARST 1992 Mar 1 170240116Smarcel -4:00 - WART 1992 Oct 18 171240116Smarcel -3:00 - ART 172240116Smarcel 173240116Smarcel# Aruba 174240116Smarcel# Zone NAME GMTOFF RULES FORMAT [UNTIL] 175240116SmarcelZone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad 176240116Smarcel -4:30 - ANT 1965 # Netherlands Antilles Time 177240116Smarcel -4:00 - AST 178240116Smarcel 179240116Smarcel# Bolivia 180240116Smarcel# Zone NAME GMTOFF RULES FORMAT [UNTIL] 181240116SmarcelZone America/La_Paz -4:32:36 - LMT 1890 182240116Smarcel -4:32:36 - LPMT 1931 Oct 15 # La Paz Mean Time 183240116Smarcel -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST 184240116Smarcel -4:00 - BOT # Bolivia Time 185240116Smarcel 186240116Smarcel# Brazil 187240116Smarcel 188240116Smarcel# From Guy Harris: 189240116Smarcel# The OAG lists 1987-10-25 and 1988-02-12 as the starting and 190240116Smarcel# ending dates, giving them as "estimated date(s) based on previous year". We 191240116Smarcel# infer a rule here from one example, always a dangerous practice.... Yes, 192240116Smarcel# they really do switch on Saturday, according to the OAG. 193240116Smarcel# "[America/Porto_Acre]" is for the Territory of Acre; 194240116Smarcel# "[America/Noronha]" is for Fernando De Noronha. 195240116Smarcel 196240116Smarcel# From Paul Eggert <eggert@twinsun.com> (1993-11-18): 197240116Smarcel# The mayor of Rio recently attempted to change the time zone rules 198240116Smarcel# just in his city, in order to leave more summer time for the tourist trade. 199240116Smarcel# The rule change lasted only part of the day; 200240116Smarcel# the federal government refused to follow the city's rules, and business 201240116Smarcel# was in a chaos, so the mayor backed down that afternoon. 202240116Smarcel 203240116Smarcel# From IATA SSIM (1996-02): 204240116Smarcel# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), 205240116Smarcel# Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ), 206240116Smarcel# Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO), 207240116Smarcel# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. 208240116Smarcel# [The last three states are new to this issue of the IATA SSIM.] 209240116Smarcel 210240116Smarcel# From Gwillim Law (1996-10-07): 211240116Smarcel# Geography, history (Tocantins was part of Goias until 1989), and other 212240116Smarcel# sources of time zone information lead me to believe that AL, SE, and TO were 213240116Smarcel# always in BR1, and so the only change was whether or not they observed DST.... 214240116Smarcel# The earliest issue of the SSIM I have is 2/91. Each issue from then until 215240116Smarcel# 9/95 says that DST is observed only in the ten states I quoted from 9/95, 216240116Smarcel# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 217240116Smarcel# (UTC-4).... The other two time zones given for Brazil are BR3, which is 218240116Smarcel# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is 219240116Smarcel# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's 220240116Smarcel# become part of the state of Pernambuco). The boundary between BR1 and BR2 221240116Smarcel# has never been clearly stated. They've simply been called East and West. 222240116Smarcel# However, some conclusions can be drawn from another IATA manual: the Airline 223240116Smarcel# Coding Directory, which lists close to 400 airports in Brazil. For each 224240116Smarcel# airport it gives a time zone which is coded to the SSIM. From that 225240116Smarcel# information, I'm led to conclude that the states of Amapa (AP), Ceara (CE), 226240116Smarcel# Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do 227240116Smarcel# Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST. 228240116Smarcel 229240116Smarcel# From Paul Eggert (1996-11-22): 230240116Smarcel# Let's make the following assumptions: 231240116Smarcel# 232240116Smarcel# * All data in Shanks are correct through 1990. In particular, 233240116Smarcel# Shanks was right when he said Acre stopped observing DST in mid-1988. 234240116Smarcel# * Areas where Shanks reports DST up to 1990, but the IATA reports no DST 235240116Smarcel# in 1995, stopped observing DST in mid-1990. 236240116Smarcel# 237240116Smarcel# Under these assumptions Brazil needs 7 entries to cover all the distinct 238240116Smarcel# time zone histories since 1970: 239240116Smarcel# 240240116Smarcel# Noronha (UTC-2), Fortaleza (UTC-3), and Manaus (UTC-4) stopped observing DST 241240116Smarcel# in mid-1990. 242240116Smarcel# Maceio (UTC-3) stopped observing DST in mid-1990, but started again mid-1995. 243240116Smarcel# Sao Paulo (UTC-3) and Cuiaba (UTC-4) always observed DST. 244240116Smarcel# Porto Acre (UTC-5) stopped observing DST in mid-1988. 245240116Smarcel 246240116Smarcel# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 247240116SmarcelRule Brazil 1931 only - Oct 3 11:00 1:00 D 248240116SmarcelRule Brazil 1932 1933 - Apr 1 0:00 0 S 249240116SmarcelRule Brazil 1932 only - Oct 3 0:00 1:00 D 250240116SmarcelRule Brazil 1949 1952 - Dec 1 0:00 1:00 D 251240116SmarcelRule Brazil 1950 only - Apr 16 0:00 0 S 252240116SmarcelRule Brazil 1951 1953 - Apr 1 0:00 0 S 253240116SmarcelRule Brazil 1963 only - Dec 9 0:00 1:00 D 254240116SmarcelRule Brazil 1964 only - Mar 1 0:00 0 S 255240116SmarcelRule Brazil 1965 only - Jan 31 0:00 1:00 D 256240116SmarcelRule Brazil 1965 only - Apr 1 0:00 0 S 257240116SmarcelRule Brazil 1965 only - Dec 1 0:00 1:00 D 258240116SmarcelRule Brazil 1966 1968 - Mar 1 0:00 0 S 259240116SmarcelRule Brazil 1966 1967 - Nov 1 0:00 1:00 D 260240116SmarcelRule Brazil 1985 only - Nov 2 0:00 1:00 D 261240116SmarcelRule Brazil 1986 only - Mar 15 0:00 0 S 262240116SmarcelRule Brazil 1986 1987 - Oct Sat<=28 0:00 1:00 D 263240116SmarcelRule Brazil 1987 only - Feb 14 0:00 0 S 264240116SmarcelRule Brazil 1988 only - Feb 7 0:00 0 S 265240116SmarcelRule Brazil 1989 only - Jan 22 0:00 0 S 266240116SmarcelRule Brazil 1988 1989 - Oct Sun>=10 0:00 1:00 D 267240116SmarcelRule Brazil 1990 1991 - Feb Sun>=11 0:00 0 S 268240116SmarcelRule Brazil 1990 1992 - Oct Sun>=20 0:00 1:00 D 269240116SmarcelRule Brazil 1992 only - Feb 9 0:00 0 S 270240116SmarcelRule Brazil 1993 max - Oct Sun>=11 0:00 1:00 D 271240116SmarcelRule Brazil 1993 only - Jan 31 0:00 0 S 272240116SmarcelRule Brazil 1994 1995 - Feb Sun>=15 0:00 0 S 273240116SmarcelRule Brazil 1996 max - Feb Sun>=11 0:00 0 S 274240116Smarcel 275240116Smarcel# Zone NAME GMTOFF RULES FORMAT [UNTIL] 276240116Smarcel# 277240116Smarcel# Fernando de Noronha 278240116SmarcelZone America/Noronha -2:09:40 - LMT 1914 279240116Smarcel -2:00 - FST 1963 Dec 9 280240116Smarcel -2:00 Brazil F%sT 1990 Jul 281240116Smarcel -2:00 - FST 282240116Smarcel# 283240116Smarcel# Amapa, east Para, Maranhao, Piaui, Ceara, Rio Grande do Norte, Paraiba, 284240116Smarcel# Pernambuco (except Fernando de Noronha) 285240116SmarcelZone America/Fortaleza -2:34:00 - LMT 1914 286240116Smarcel -3:00 - EST 1963 Dec 9 287240116Smarcel -3:00 Brazil E%sT 1990 Jul 288240116Smarcel -3:00 - EST 289240116Smarcel# 290240116Smarcel# Alagoas, Sergipe, Tocantins 291240116SmarcelZone America/Maceio -2:22:52 - LMT 1914 292240116Smarcel -3:00 - EST 1963 Dec 9 293240116Smarcel -3:00 Brazil E%sT 1990 Jul 294240116Smarcel -3:00 - EST 1995 Jul 295240116Smarcel -3:00 Brazil E%sT 296240116Smarcel# 297240116Smarcel# Bahia, Goias, Distrito Federal, Minas Gerais, Espirito Santo, Rio de Janeiro, 298240116Smarcel# Sao Paulo, Parana, Santa Catarina, Rio Grande do Sul 299240116SmarcelZone America/Sao_Paulo -3:06:28 - LMT 1914 300240116Smarcel -3:00 Brazil E%sT 301240116Smarcel# 302240116Smarcel# Mato Grosso, Mato Grosso do Sul 303240116SmarcelZone America/Cuiaba -3:44:20 - LMT 1914 304240116Smarcel -4:00 - WST 1963 Dec 9 305240116Smarcel -4:00 Brazil W%sT 306240116Smarcel# 307240116Smarcel# Roraima, west Para, Amazonas, Rondonia 308240116SmarcelZone America/Manaus -4:00:04 - LMT 1914 309240116Smarcel -4:00 - WST 1963 Dec 9 310240116Smarcel -4:00 Brazil W%sT 1990 Jul 311240116Smarcel -4:00 - WST 312240116Smarcel# 313240116Smarcel# Acre 314240116Smarcel# Rio_Branco is too ambiguous, since there's a Rio Branco in Uruguay too. 315240116SmarcelZone America/Porto_Acre -4:31:12 - LMT 1914 316240116Smarcel -5:00 - AST 1963 Dec 9 317240116Smarcel -5:00 Brazil A%sT 1988 Jul 318240116Smarcel -5:00 - AST 319240116Smarcel# 320240116Smarcel# Martin Vaz and Trinidade are like America/Noronha. 321240116Smarcel 322240116Smarcel 323240116Smarcel# Chile 324240116Smarcel 325240116Smarcel# From Eduardo Krell (1995-10-19): 326240116Smarcel# The law says to switch to DST at midnight [24:00] on the second SATURDAY 327240116Smarcel# of October.... The law is the same for March and October. 328240116Smarcel 329240116Smarcel# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 330240116SmarcelRule Chile 1918 only - Sep 1 0:00 1:00 S 331240116SmarcelRule Chile 1919 only - Jul 2 0:00 0 - 332240116SmarcelRule Chile 1927 1931 - Sep 1 0:00 1:00 S 333240116SmarcelRule Chile 1928 1932 - Apr 1 0:00 0 - 334240116SmarcelRule Chile 1969 max - Oct Sun>=9 0:00 1:00 S 335240116SmarcelRule Chile 1970 max - Mar Sun>=9 0:00 0 - 336240116Smarcel# IATA SSIM anomalies: (1990-09) says 1990-09-16; (1992-02) says 1992-03-14; 337240116Smarcel# (1996-09) says 1998-03-08. Ignore these for now. 338240116Smarcel# Zone NAME GMTOFF RULES FORMAT [UNTIL] 339240116SmarcelZone America/Santiago -4:42:40 - LMT 1890 340240116Smarcel -4:42:40 - SMT 1910 # Santiago Mean Time 341240116Smarcel -5:00 Chile CL%sT 1932 Sep # Chile Time 342240116Smarcel -4:00 Chile CL%sT 343240116SmarcelZone Pacific/Easter -7:17:28 - LMT 1890 # Mataveri 344240116Smarcel -7:17:28 - MMT 1932 Sep # Mataveri Mean Time 345240116Smarcel -7:00 Chile EAS%sT 1982 Mar 14 # Easter I Time 346240116Smarcel -6:00 Chile EAS%sT 347240116Smarcel# 348240116Smarcel# Whitman says Juan Fernandez Is are like America/Santiago. 349240116Smarcel# San Ambrosio, San Felix 350240116Smarcel# no information; probably like America/Santiago 351240116Smarcel 352240116Smarcel 353240116Smarcel# Colombia 354240116Smarcel# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 355240116SmarcelRule CO 1992 only - May 2 0:00 1:00 S 356240116SmarcelRule CO 1992 only - Dec 31 0:00 0 - 357240116Smarcel# Zone NAME GMTOFF RULES FORMAT [UNTIL] 358240116SmarcelZone America/Bogota -4:56:20 - LMT 1884 Mar 13 359240116Smarcel -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time 360240116Smarcel -5:00 CO CO%sT # Colombia Time 361240116Smarcel# Malpelo, Providencia, San Andres 362240116Smarcel# no information; probably like America/Bogota 363240116Smarcel 364240116Smarcel# Curacao 365240116Smarcel# Zone NAME GMTOFF RULES FORMAT [UNTIL] 366240116SmarcelZone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad 367240116Smarcel -4:30 - ANT 1965 # Netherlands Antilles Time 368240116Smarcel -4:00 - AST 369240116Smarcel 370240116Smarcel# Ecuador 371240116Smarcel# Zone NAME GMTOFF RULES FORMAT [UNTIL] 372240116SmarcelZone America/Guayaquil -5:19:20 - LMT 1890 373240116Smarcel -5:14:00 - QMT 1931 # Quito Mean Time 374240116Smarcel -5:00 - ECT # Ecuador Time 375240116SmarcelZone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno 376240116Smarcel -5:00 - ECT 1986 377240116Smarcel -6:00 - GALT # Galapagos Time 378240116Smarcel 379240116Smarcel# Falklands 380240116Smarcel# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 381240116SmarcelRule Falk 1937 1938 - Sep lastSun 0:00 1:00 S 382240116SmarcelRule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 383240116SmarcelRule Falk 1939 only - Oct 1 0:00 1:00 S 384240116SmarcelRule Falk 1940 1942 - Sep lastSun 0:00 1:00 S 385240116SmarcelRule Falk 1943 only - Jan 1 0:00 0 - 386240116SmarcelRule Falk 1983 only - Sep lastSun 0:00 1:00 S 387240116SmarcelRule Falk 1984 1985 - Apr lastSun 0:00 0 - 388240116SmarcelRule Falk 1984 only - Sep 16 0:00 1:00 S 389240116SmarcelRule Falk 1985 1995 - Sep Sun>=9 0:00 1:00 S 390240116SmarcelRule Falk 1986 max - Apr Sun>=16 0:00 0 - 391240116SmarcelRule Falk 1996 max - Sep Sun>=8 0:00 1:00 S 392240116Smarcel# Zone NAME GMTOFF RULES FORMAT [UNTIL] 393240116SmarcelZone Atlantic/Stanley -3:51:24 - LMT 1890 394240116Smarcel -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 395240116Smarcel -4:00 Falk FK%sT 1983 May # Falkland Is Time 396240116Smarcel -3:00 Falk FK%sT 1985 Sep 15 397240116Smarcel -4:00 Falk FK%sT 398240116Smarcel 399240116Smarcel# French Guiana 400240116Smarcel# Zone NAME GMTOFF RULES FORMAT [UNTIL] 401240116SmarcelZone America/Cayenne -3:29:20 - LMT 1911 Jul 402240116Smarcel -4:00 - GFT 1967 Oct # French Guiana Time 403240116Smarcel -3:00 - GFT 404240116Smarcel 405240116Smarcel# Guyana 406240116Smarcel# Zone NAME GMTOFF RULES FORMAT [UNTIL] 407240116SmarcelZone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown 408240116Smarcel -3:45 - GBGT 1966 May 26 # Br Guiana Time 409240116Smarcel -3:45 - GYT 1975 Jul 31 # Guyana Time 410240116Smarcel -3:00 - GYT 1991 411240116Smarcel# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch. 412240116Smarcel -4:00 - GYT 413240116Smarcel 414240116Smarcel# Paraguay 415240116Smarcel 416240116Smarcel# From Bob Devine (1988-01-28): 417240116Smarcel# Paraguay: First day in October to last in March. Midnight switch?? 418240116Smarcel# Since 1980. 419240116Smarcel 420240116Smarcel# From U. S. Naval Observatory (1989-01-19): 421240116Smarcel# PARAGUAY 4 H BEHIND UTC 422240116Smarcel# PARAGUAY 3 H BEHIND UTC OCT 1, '88-MAR 31, '89 423240116Smarcel 424240116Smarcel# From Shanks (1991): 425240116Smarcel# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 426240116SmarcelRule Para 1975 1978 - Oct 1 0:00 1:00 S 427240116SmarcelRule Para 1975 1978 - Mar 1 0:00 0 - 428240116Smarcel# Shanks says 1979 was all DST. 429240116SmarcelRule Para 1980 1991 - Apr 1 0:00 0 - 430240116SmarcelRule Para 1980 1988 - Oct 1 0:00 1:00 S 431240116SmarcelRule Para 1989 only - Oct 22 0:00 1:00 S 432240116SmarcelRule Para 1990 only - Oct 1 0:00 1:00 S 433240116SmarcelRule Para 1991 only - Oct 6 0:00 1:00 S 434240116SmarcelRule Para 1992 only - Mar 1 0:00 0 - 435240116SmarcelRule Para 1992 only - Oct 5 0:00 1:00 S 436240116SmarcelRule Para 1993 only - Mar 31 0:00 0 - 437240116SmarcelRule Para 1993 max - Oct 1 0:00 1:00 S 438240116SmarcelRule Para 1994 1995 - Feb lastSun 0:00 0 - 439240116SmarcelRule Para 1996 max - Mar 1 0:00 0 - 440240116Smarcel# Zone NAME GMTOFF RULES FORMAT [UNTIL] 441240116SmarcelZone America/Asuncion -3:50:40 - LMT 1890 442240116Smarcel -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time 443240116Smarcel -4:00 - PYT 1972 Oct # Paraguay Time 444240116Smarcel -3:00 - PYT 1974 Apr 445240116Smarcel -4:00 Para PY%sT 446240116Smarcel 447240116Smarcel# Peru 448240116Smarcel# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 449240116SmarcelRule Peru 1938 only - Jan 1 0:00 1:00 S 450240116SmarcelRule Peru 1938 only - Apr 1 0:00 0 - 451240116SmarcelRule Peru 1938 1939 - Sep lastSun 0:00 1:00 S 452240116SmarcelRule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 453240116SmarcelRule Peru 1987 only - Jan 1 0:00 1:00 S 454240116SmarcelRule Peru 1987 only - Apr 1 0:00 0 - 455240116SmarcelRule Peru 1990 only - Jan 1 0:00 1:00 S 456240116SmarcelRule Peru 1990 only - Apr 1 0:00 0 - 457240116SmarcelRule Peru 1993 only - Jan 1 0:00 1:00 S 458240116SmarcelRule Peru 1993 only - Apr 1 0:00 0 - 459240116Smarcel# Zone NAME GMTOFF RULES FORMAT [UNTIL] 460240116SmarcelZone America/Lima -5:08:12 - LMT 1890 461240116Smarcel -5:09 - LMT 1908 Jul 28 # Lima Mean Time 462240116Smarcel -5:00 Peru PE%sT # Peru Time 463240116Smarcel 464240116Smarcel# South Georgia 465240116Smarcel# Zone NAME GMTOFF RULES FORMAT [UNTIL] 466240116SmarcelZone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken 467240116Smarcel -2:00 - GST # South Georgia Time 468240116Smarcel 469240116Smarcel# South Sandwich Is 470240116Smarcel# uninhabited 471240116Smarcel 472240116Smarcel# Suriname 473240116Smarcel# Zone NAME GMTOFF RULES FORMAT [UNTIL] 474240116SmarcelZone America/Paramaribo -3:40:40 - LMT 1911 475240116Smarcel -3:40:52 - PMT 1935 # Paramaribo Mean Time 476240116Smarcel -3:40:36 - PMT 1945 Oct # The capital moved? 477240116Smarcel -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time 478240116Smarcel -3:30 - SRT 1984 Oct # Suriname Time 479240116Smarcel -3:00 - SRT 480240116Smarcel 481240116Smarcel# Trinidad and Tobago 482240116Smarcel# Zone NAME GMTOFF RULES FORMAT [UNTIL] 483240116SmarcelZone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2 484240116Smarcel -4:00 - AST 485240116Smarcel 486240116Smarcel# Uruguay 487240116Smarcel# From Paul Eggert <eggert@twinsun.com> (1993-11-18): 488240116Smarcel# Uruguay wins the prize for the strangest peacetime manipulation of the rules. 489240116Smarcel# From Shanks (1991): 490240116Smarcel# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 491240116Smarcel# Whitman gives 1923 Oct 1; go with Shanks. 492240116SmarcelRule Uruguay 1923 only - Oct 2 0:00 0:30 HS 493240116SmarcelRule Uruguay 1924 1926 - Apr 1 0:00 0 - 494240116SmarcelRule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS 495240116SmarcelRule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS 496240116Smarcel# Shanks gives 1935 Apr 1 0:00 and 1936 Mar 30 0:00; go with Whitman. 497240116SmarcelRule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 - 498240116SmarcelRule Uruguay 1936 only - Nov 1 0:00 0:30 HS 499240116SmarcelRule Uruguay 1937 1941 - Mar lastSun 0:00 0 - 500240116Smarcel# Whitman gives 1937 Oct 3; go with Shanks. 501240116SmarcelRule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS 502240116Smarcel# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13, 503240116Smarcel# and 1943 Apr 13 ``to present time''; go with Shanks. 504240116SmarcelRule Uruguay 1941 only - Aug 1 0:00 0 - 505240116SmarcelRule Uruguay 1942 only - Jan 1 0:00 0:30 HS 506240116SmarcelRule Uruguay 1942 only - Dec 14 0:00 1:00 S 507240116SmarcelRule Uruguay 1943 only - Mar 14 0:00 0 - 508240116SmarcelRule Uruguay 1959 only - May 24 0:00 1:00 S 509240116SmarcelRule Uruguay 1959 only - Nov 15 0:00 0 - 510240116SmarcelRule Uruguay 1960 only - Jan 17 0:00 1:00 S 511240116SmarcelRule Uruguay 1960 only - Mar 6 0:00 0 - 512240116SmarcelRule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S 513240116SmarcelRule Uruguay 1965 only - Sep 26 0:00 0 - 514240116SmarcelRule Uruguay 1966 1967 - Oct 31 0:00 0 - 515240116SmarcelRule Uruguay 1968 1970 - May 27 0:00 0:30 HS 516240116SmarcelRule Uruguay 1968 1970 - Dec 2 0:00 0 - 517240116SmarcelRule Uruguay 1972 only - Apr 24 0:00 1:00 S 518240116SmarcelRule Uruguay 1972 only - Aug 15 0:00 0 - 519240116SmarcelRule Uruguay 1974 only - Mar 10 0:00 0:30 HS 520240116SmarcelRule Uruguay 1974 only - Dec 22 0:00 1:00 S 521240116SmarcelRule Uruguay 1976 only - Oct 1 0:00 0 - 522240116SmarcelRule Uruguay 1977 only - Dec 4 0:00 1:00 S 523240116SmarcelRule Uruguay 1978 only - Apr 1 0:00 0 - 524240116SmarcelRule Uruguay 1979 only - Oct 1 0:00 1:00 S 525240116SmarcelRule Uruguay 1980 only - May 1 0:00 0 - 526240116SmarcelRule Uruguay 1987 only - Dec 14 0:00 1:00 S 527240116SmarcelRule Uruguay 1988 only - Mar 14 0:00 0 - 528240116SmarcelRule Uruguay 1988 only - Dec 11 0:00 1:00 S 529240116SmarcelRule Uruguay 1989 only - Mar 12 0:00 0 - 530240116SmarcelRule Uruguay 1989 only - Oct 29 0:00 1:00 S 531240116SmarcelRule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 - 532240116SmarcelRule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S 533240116SmarcelRule Uruguay 1992 1993 - Oct Sun>=15 0:00 1:00 S 534240116SmarcelRule Uruguay 1993 only - Feb 28 0:00 0 - 535240116Smarcel# Zone NAME GMTOFF RULES FORMAT [UNTIL] 536240116SmarcelZone America/Montevideo -3:44:44 - LMT 1898 Jun 28 537240116Smarcel -3:44:44 - MMT 1920 May 1 # Montevideo MT 538240116Smarcel -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time 539240116Smarcel -3:00 Uruguay UY%sT 540240116Smarcel 541240116Smarcel# Venezuela 542240116Smarcel# Zone NAME GMTOFF RULES FORMAT [UNTIL] 543240116SmarcelZone America/Caracas -4:27:44 - LMT 1890 544240116Smarcel -4:27:44 - CMT 1912 Feb 12 # Caracas Mean Time 545240116Smarcel -4:30 - VET 1965 # Venezuela Time 546240116Smarcel -4:00 - VET 547240116Smarcel