southamerica revision 30711
1# @(#)southamerica 7.18 2 3# This data is by no means authoritative; if you think you know better, 4# go ahead and edit the file (and please send any changes to 5# tz@elsie.nci.nih.gov for general use in the future). 6 7# From Paul Eggert <eggert@twinsun.com> (1996-11-22): 8# A good source for time zone historical data outside the U.S. is 9# Thomas G. Shanks, The International Atlas (3rd edition), 10# San Diego: ACS Publications, Inc. (1991). 11# 12# Gwillim Law <LAW@encmail.encompass.com> writes that a good source 13# for recent time zone data is the International Air Transport 14# Association's Standard Schedules Information Manual (IATA SSIM), 15# published semiannually. Law sent in several helpful summaries 16# of the IATA's data after 1990. 17# 18# Except where otherwise noted, Shanks is the source for entries through 1990, 19# and IATA SSIM is the source for entries after 1990. 20# 21# The following abbreviations are used in this file. 22# Corrections are welcome! 23# std dst 24# LMT Local Mean Time 25# -2:00 FST FDT Fernando de Noronha 26# -3:00 EST EDT Eastern Brazil 27# -4:00 WST WDT Western Brazil 28# -4:00 AST ADT Atlantic 29# -5:00 AST ADT Acre 30# 31# See the `africa' file for time zone naming and abbreviation conventions. 32# Earlier editions of these tables used the North American style (e.g. ARST and 33# ARDT for Argentine Standard and Daylight Time), but the following quote 34# suggests that it's better to use European style (e.g. ART and ARST). 35# I suggest the use of _Summer time_ instead of the more cumbersome 36# _daylight-saving time_. _Summer time_ seems to be in general use 37# in Europe and South America. 38# -- E O Cutler, _New York Times_ (1937-02-14), quoted in 39# H L Mencken, _The American Language: Supplement I_ (1960), p 466 40 41 42# From Guy Harris: 43# From Official Airline Guide - Worldwide Edition (1987). Countries not 44# listed here do not observe DST, according to the OAG. Time zone names 45# are pure inventions, and none are supplied for countries not observing 46# DST; updates from natives would be appreciated. The times that DST 47# starts and ends are based on the assumption that they switch a 2AM just 48# as everybody else does. 49 50############################################################################### 51 52############################################################################### 53 54# Argentina 55 56# From Bob Devine (1988-01-28): 57# Argentina: first Sunday in October to first Sunday in April since 1976. 58# Double Summer time from 1969 to 1974. Switches at midnight. 59 60# From U. S. Naval Observatory (1988-01-199): 61# ARGENTINA 3 H BEHIND UTC 62 63# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): 64# I am sending modifications to the Argentine time zone table... 65# AR was chosen because they are the ISO letters that represent Argentina. 66 67# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 68Rule Arg 1930 only - Dec 1 0:00 1:00 S 69Rule Arg 1931 only - Apr 1 0:00 0 - 70Rule Arg 1931 only - Oct 15 0:00 1:00 S 71Rule Arg 1932 1940 - Mar 1 0:00 0 - 72Rule Arg 1932 1939 - Nov 1 0:00 1:00 S 73Rule Arg 1940 only - Jul 1 0:00 1:00 S 74Rule Arg 1941 only - Jun 15 0:00 0 - 75Rule Arg 1941 only - Oct 15 0:00 1:00 S 76Rule Arg 1943 only - Aug 1 0:00 0 - 77Rule Arg 1943 only - Oct 15 0:00 1:00 S 78Rule Arg 1946 only - Mar 1 0:00 0 - 79Rule Arg 1946 only - Oct 1 0:00 1:00 S 80Rule Arg 1963 only - Oct 1 0:00 0 - 81Rule Arg 1963 only - Dec 15 0:00 1:00 S 82Rule Arg 1964 1966 - Mar 1 0:00 0 - 83Rule Arg 1964 1966 - Oct 15 0:00 1:00 S 84Rule Arg 1967 only - Apr 1 0:00 0 - 85Rule Arg 1967 1968 - Oct Sun<=7 0:00 1:00 S 86Rule Arg 1968 1969 - Apr Sun<=7 0:00 0 - 87Rule Arg 1974 only - Jan 23 0:00 1:00 S 88Rule Arg 1974 only - May 1 0:00 0 - 89Rule Arg 1974 1976 - Oct Sun<=7 0:00 1:00 S 90Rule Arg 1975 1977 - Apr Sun<=7 0:00 0 - 91Rule Arg 1985 only - Nov 2 0:00 1:00 S 92Rule Arg 1986 only - Mar 14 0:00 0 - 93Rule Arg 1986 1987 - Oct 25 0:00 1:00 S 94Rule Arg 1987 only - Feb 13 0:00 0 - 95Rule Arg 1988 only - Feb 7 0:00 0 - 96Rule Arg 1988 only - Dec 1 0:00 1:00 S 97# 98# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): 99# These corrections were contributed by InterSoft Argentina S.A., 100# obtaining the data from the: 101# Talleres de Hidrografia Naval Argentina 102# (Argentine Naval Hydrography Institute) 103# 104# Shanks gives 1989 Mar 16 and stops after 1990 Mar 4; go with Otero. 105Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 - 106Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S 107# 108# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): 109# From this moment on, the law that mandated the daylight saving 110# time corrections was derogated and no more modifications 111# to the time zones (for daylight saving) are now made. 112# 113# Zone NAME GMTOFF RULES FORMAT [UNTIL] 114# 115# Buenos Aires (BA), Distrito Federal (DF), Santa Cruz (SC), 116# Tierra del Fuego (TF) & Antartida e Islas 117Zone America/Buenos_Aires -3:53:48 - LMT 1894 Nov 118 -4:16:44 - CMT 1920 May # Cordoba Mean Time 119 -4:00 - ART 1930 Dec 120 -4:00 Arg AR%sT 1969 Oct 5 121 -3:00 Arg AR%sT 122# 123# Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC), 124# Formosa (FM), La Pampa (LP), Chubut (CH) 125Zone America/Rosario -4:02:40 - LMT 1894 Nov 126 -4:16:44 - CMT 1920 May 127 -4:00 - ART 1930 Dec 128 -4:00 Arg AR%sT 1969 Oct 5 129 -3:00 Arg AR%sT 1991 Jul 130 -3:00 - ART 131# 132# Cordoba (CB), Santiago del Estero (SE), Salta (SA), Tucuman (TM), La Rioja (LR), San Juan (SJ), San Luis (SL), 133# Neuquen (NQ), Rio Negro (RN) 134Zone America/Cordoba -4:16:44 - LMT 1894 Nov 135 -4:16:44 - CMT 1920 May 136 -4:00 - ART 1930 Dec 137 -4:00 Arg AR%sT 1969 Oct 5 138 -3:00 Arg AR%sT 1990 Jul 139 -3:00 - ART 140# 141# Jujuy (JY) 142Zone America/Jujuy -4:21:12 - LMT 1894 Nov 143 -4:16:44 - CMT 1920 May 144 -4:00 - ART 1930 Dec 145 -4:00 Arg AR%sT 1969 Oct 5 146 -3:00 Arg AR%sT 1991 Mar 3 147 -4:00 - WART 1991 Oct 6 148 -4:00 1:00 WARST 1992 Mar 15 149 -4:00 - WART 1992 Oct 18 150 -3:00 - ART 151# 152# Catamarca (CT) 153Zone America/Catamarca -4:23:08 - LMT 1894 Nov 154 -4:16:44 - CMT 1920 May 155 -4:00 - ART 1930 Dec 156 -4:00 Arg AR%sT 1969 Oct 5 157 -3:00 Arg AR%sT 1990 Jul 158 -3:00 - ART 1991 Jul 159 -3:00 Arg AR%sT 1992 Jul 160 -3:00 - ART 161# 162# Mendoza (MZ) 163Zone America/Mendoza -4:35:16 - LMT 1894 Nov 164 -4:16:44 - CMT 1920 May 165 -4:00 - ART 1930 Dec 166 -4:00 Arg AR%sT 1969 Oct 5 167 -3:00 Arg AR%sT 1991 Mar 3 168 -4:00 - WART 1991 Oct 15 169 -4:00 1:00 WARST 1992 Mar 1 170 -4:00 - WART 1992 Oct 18 171 -3:00 - ART 172 173# Aruba 174# Zone NAME GMTOFF RULES FORMAT [UNTIL] 175Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad 176 -4:30 - ANT 1965 # Netherlands Antilles Time 177 -4:00 - AST 178 179# Bolivia 180# Zone NAME GMTOFF RULES FORMAT [UNTIL] 181Zone America/La_Paz -4:32:36 - LMT 1890 182 -4:32:36 - LPMT 1931 Oct 15 # La Paz Mean Time 183 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST 184 -4:00 - BOT # Bolivia Time 185 186# Brazil 187 188# From Guy Harris: 189# The OAG lists 1987-10-25 and 1988-02-12 as the starting and 190# ending dates, giving them as "estimated date(s) based on previous year". We 191# infer a rule here from one example, always a dangerous practice.... Yes, 192# they really do switch on Saturday, according to the OAG. 193# "[America/Porto_Acre]" is for the Territory of Acre; 194# "[America/Noronha]" is for Fernando De Noronha. 195 196# From Paul Eggert <eggert@twinsun.com> (1993-11-18): 197# The mayor of Rio recently attempted to change the time zone rules 198# just in his city, in order to leave more summer time for the tourist trade. 199# The rule change lasted only part of the day; 200# the federal government refused to follow the city's rules, and business 201# was in a chaos, so the mayor backed down that afternoon. 202 203# From IATA SSIM (1996-02): 204# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), 205# Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ), 206# Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO), 207# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. 208# [The last three states are new to this issue of the IATA SSIM.] 209 210# From Gwillim Law (1996-10-07): 211# Geography, history (Tocantins was part of Goias until 1989), and other 212# sources of time zone information lead me to believe that AL, SE, and TO were 213# always in BR1, and so the only change was whether or not they observed DST.... 214# The earliest issue of the SSIM I have is 2/91. Each issue from then until 215# 9/95 says that DST is observed only in the ten states I quoted from 9/95, 216# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 217# (UTC-4).... The other two time zones given for Brazil are BR3, which is 218# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is 219# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's 220# become part of the state of Pernambuco). The boundary between BR1 and BR2 221# has never been clearly stated. They've simply been called East and West. 222# However, some conclusions can be drawn from another IATA manual: the Airline 223# Coding Directory, which lists close to 400 airports in Brazil. For each 224# airport it gives a time zone which is coded to the SSIM. From that 225# information, I'm led to conclude that the states of Amapa (AP), Ceara (CE), 226# Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do 227# Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST. 228 229# From Paul Eggert (1996-11-22): 230# Let's make the following assumptions: 231# 232# * All data in Shanks are correct through 1990. In particular, 233# Shanks was right when he said Acre stopped observing DST in mid-1988. 234# * Areas where Shanks reports DST up to 1990, but the IATA reports no DST 235# in 1995, stopped observing DST in mid-1990. 236# 237# Under these assumptions Brazil needs 7 entries to cover all the distinct 238# time zone histories since 1970: 239# 240# Noronha (UTC-2), Fortaleza (UTC-3), and Manaus (UTC-4) stopped observing DST 241# in mid-1990. 242# Maceio (UTC-3) stopped observing DST in mid-1990, but started again mid-1995. 243# Sao Paulo (UTC-3) and Cuiaba (UTC-4) always observed DST. 244# Porto Acre (UTC-5) stopped observing DST in mid-1988. 245 246# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 247Rule Brazil 1931 only - Oct 3 11:00 1:00 D 248Rule Brazil 1932 1933 - Apr 1 0:00 0 S 249Rule Brazil 1932 only - Oct 3 0:00 1:00 D 250Rule Brazil 1949 1952 - Dec 1 0:00 1:00 D 251Rule Brazil 1950 only - Apr 16 0:00 0 S 252Rule Brazil 1951 1953 - Apr 1 0:00 0 S 253Rule Brazil 1963 only - Dec 9 0:00 1:00 D 254Rule Brazil 1964 only - Mar 1 0:00 0 S 255Rule Brazil 1965 only - Jan 31 0:00 1:00 D 256Rule Brazil 1965 only - Apr 1 0:00 0 S 257Rule Brazil 1965 only - Dec 1 0:00 1:00 D 258Rule Brazil 1966 1968 - Mar 1 0:00 0 S 259Rule Brazil 1966 1967 - Nov 1 0:00 1:00 D 260Rule Brazil 1985 only - Nov 2 0:00 1:00 D 261Rule Brazil 1986 only - Mar 15 0:00 0 S 262Rule Brazil 1986 1987 - Oct Sat<=28 0:00 1:00 D 263Rule Brazil 1987 only - Feb 14 0:00 0 S 264Rule Brazil 1988 only - Feb 7 0:00 0 S 265Rule Brazil 1989 only - Jan 22 0:00 0 S 266Rule Brazil 1988 1989 - Oct Sun>=10 0:00 1:00 D 267Rule Brazil 1990 1991 - Feb Sun>=11 0:00 0 S 268Rule Brazil 1990 1992 - Oct Sun>=20 0:00 1:00 D 269Rule Brazil 1992 only - Feb 9 0:00 0 S 270Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 D 271Rule Brazil 1993 only - Jan 31 0:00 0 S 272Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 S 273Rule Brazil 1996 max - Feb Sun>=11 0:00 0 S 274Rule Brazil 1996 max - Oct Sun>=1 0:00 1:00 D 275 276# Zone NAME GMTOFF RULES FORMAT [UNTIL] 277# 278# Fernando de Noronha 279Zone America/Noronha -2:09:40 - LMT 1914 280 -2:00 - FST 1963 Dec 9 281 -2:00 Brazil F%sT 1990 Jul 282 -2:00 - FST 283# 284# Amapa, east Para, Maranhao, Piaui, Ceara, Rio Grande do Norte, Paraiba, 285# Pernambuco (except Fernando de Noronha) 286Zone America/Fortaleza -2:34:00 - LMT 1914 287 -3:00 - EST 1963 Dec 9 288 -3:00 Brazil E%sT 1990 Jul 289 -3:00 - EST 290# 291# Alagoas, Sergipe, Tocantins 292Zone America/Maceio -2:22:52 - LMT 1914 293 -3:00 - EST 1963 Dec 9 294 -3:00 Brazil E%sT 1990 Jul 295 -3:00 - EST 1995 Jul 296 -3:00 Brazil E%sT 297# 298# Bahia, Goias, Distrito Federal, Minas Gerais, Espirito Santo, Rio de Janeiro, 299# Sao Paulo, Parana, Santa Catarina, Rio Grande do Sul 300Zone America/Sao_Paulo -3:06:28 - LMT 1914 301 -3:00 Brazil E%sT 302# 303# Mato Grosso, Mato Grosso do Sul 304Zone America/Cuiaba -3:44:20 - LMT 1914 305 -4:00 - WST 1963 Dec 9 306 -4:00 Brazil W%sT 307# 308# Roraima, west Para, Amazonas, Rondonia 309Zone America/Manaus -4:00:04 - LMT 1914 310 -4:00 - WST 1963 Dec 9 311 -4:00 Brazil W%sT 1990 Jul 312 -4:00 - WST 313# 314# Acre 315# Rio_Branco is too ambiguous, since there's a Rio Branco in Uruguay too. 316Zone America/Porto_Acre -4:31:12 - LMT 1914 317 -5:00 - AST 1963 Dec 9 318 -5:00 Brazil A%sT 1988 Jul 319 -5:00 - AST 320# 321# Martin Vaz and Trinidade are like America/Noronha. 322 323 324# Chile 325 326# From Eduardo Krell (1995-10-19): 327# The law says to switch to DST at midnight [24:00] on the second SATURDAY 328# of October.... The law is the same for March and October. 329 330# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 331Rule Chile 1918 only - Sep 1 0:00 1:00 S 332Rule Chile 1919 only - Jul 2 0:00 0 - 333Rule Chile 1927 1931 - Sep 1 0:00 1:00 S 334Rule Chile 1928 1932 - Apr 1 0:00 0 - 335Rule Chile 1969 max - Oct Sun>=9 0:00 1:00 S 336Rule Chile 1970 max - Mar Sun>=9 0:00 0 - 337# IATA SSIM anomalies: (1990-09) says 1990-09-16; (1992-02) says 1992-03-14; 338# (1996-09) says 1998-03-08. Ignore these for now. 339# Zone NAME GMTOFF RULES FORMAT [UNTIL] 340Zone America/Santiago -4:42:40 - LMT 1890 341 -4:42:40 - SMT 1910 # Santiago Mean Time 342 -5:00 Chile CL%sT 1932 Sep # Chile Time 343 -4:00 Chile CL%sT 344Zone Pacific/Easter -7:17:28 - LMT 1890 # Mataveri 345 -7:17:28 - MMT 1932 Sep # Mataveri Mean Time 346 -7:00 Chile EAS%sT 1982 Mar 14 # Easter I Time 347 -6:00 Chile EAS%sT 348# 349# Whitman says Juan Fernandez Is are like America/Santiago. 350# San Ambrosio, San Felix 351# no information; probably like America/Santiago 352 353 354# Colombia 355# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 356Rule CO 1992 only - May 2 0:00 1:00 S 357Rule CO 1992 only - Dec 31 0:00 0 - 358# Zone NAME GMTOFF RULES FORMAT [UNTIL] 359Zone America/Bogota -4:56:20 - LMT 1884 Mar 13 360 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time 361 -5:00 CO CO%sT # Colombia Time 362# Malpelo, Providencia, San Andres 363# no information; probably like America/Bogota 364 365# Curacao 366# Zone NAME GMTOFF RULES FORMAT [UNTIL] 367Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad 368 -4:30 - ANT 1965 # Netherlands Antilles Time 369 -4:00 - AST 370 371# Ecuador 372# Zone NAME GMTOFF RULES FORMAT [UNTIL] 373Zone America/Guayaquil -5:19:20 - LMT 1890 374 -5:14:00 - QMT 1931 # Quito Mean Time 375 -5:00 - ECT # Ecuador Time 376Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno 377 -5:00 - ECT 1986 378 -6:00 - GALT # Galapagos Time 379 380# Falklands 381# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 382Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S 383Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 384Rule Falk 1939 only - Oct 1 0:00 1:00 S 385Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S 386Rule Falk 1943 only - Jan 1 0:00 0 - 387Rule Falk 1983 only - Sep lastSun 0:00 1:00 S 388Rule Falk 1984 1985 - Apr lastSun 0:00 0 - 389Rule Falk 1984 only - Sep 16 0:00 1:00 S 390Rule Falk 1985 1995 - Sep Sun>=9 0:00 1:00 S 391Rule Falk 1986 max - Apr Sun>=16 0:00 0 - 392Rule Falk 1996 max - Sep Sun>=8 0:00 1:00 S 393# Zone NAME GMTOFF RULES FORMAT [UNTIL] 394Zone Atlantic/Stanley -3:51:24 - LMT 1890 395 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 396 -4:00 Falk FK%sT 1983 May # Falkland Is Time 397 -3:00 Falk FK%sT 1985 Sep 15 398 -4:00 Falk FK%sT 399 400# French Guiana 401# Zone NAME GMTOFF RULES FORMAT [UNTIL] 402Zone America/Cayenne -3:29:20 - LMT 1911 Jul 403 -4:00 - GFT 1967 Oct # French Guiana Time 404 -3:00 - GFT 405 406# Guyana 407# Zone NAME GMTOFF RULES FORMAT [UNTIL] 408Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown 409 -3:45 - GBGT 1966 May 26 # Br Guiana Time 410 -3:45 - GYT 1975 Jul 31 # Guyana Time 411 -3:00 - GYT 1991 412# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch. 413 -4:00 - GYT 414 415# Paraguay 416 417# From Bob Devine (1988-01-28): 418# Paraguay: First day in October to last in March. Midnight switch?? 419# Since 1980. 420 421# From U. S. Naval Observatory (1989-01-19): 422# PARAGUAY 4 H BEHIND UTC 423# PARAGUAY 3 H BEHIND UTC OCT 1, '88-MAR 31, '89 424 425# From Shanks (1991): 426# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 427Rule Para 1975 1978 - Oct 1 0:00 1:00 S 428Rule Para 1975 1978 - Mar 1 0:00 0 - 429# Shanks says 1979 was all DST. 430Rule Para 1980 1991 - Apr 1 0:00 0 - 431Rule Para 1980 1988 - Oct 1 0:00 1:00 S 432Rule Para 1989 only - Oct 22 0:00 1:00 S 433Rule Para 1990 only - Oct 1 0:00 1:00 S 434Rule Para 1991 only - Oct 6 0:00 1:00 S 435Rule Para 1992 only - Mar 1 0:00 0 - 436Rule Para 1992 only - Oct 5 0:00 1:00 S 437Rule Para 1993 only - Mar 31 0:00 0 - 438Rule Para 1993 1995 - Oct 1 0:00 1:00 S 439Rule Para 1994 1995 - Feb lastSun 0:00 0 - 440Rule Para 1996 max - Mar 1 0:00 0 - 441Rule Para 1996 only - Oct 6 0:00 1:00 S 442Rule Para 1997 max - Oct 1 0:00 1:00 S 443# Zone NAME GMTOFF RULES FORMAT [UNTIL] 444Zone America/Asuncion -3:50:40 - LMT 1890 445 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time 446 -4:00 - PYT 1972 Oct # Paraguay Time 447 -3:00 - PYT 1974 Apr 448 -4:00 Para PY%sT 449 450# Peru 451# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 452Rule Peru 1938 only - Jan 1 0:00 1:00 S 453Rule Peru 1938 only - Apr 1 0:00 0 - 454Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S 455Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 456Rule Peru 1987 only - Jan 1 0:00 1:00 S 457Rule Peru 1987 only - Apr 1 0:00 0 - 458Rule Peru 1990 only - Jan 1 0:00 1:00 S 459Rule Peru 1990 only - Apr 1 0:00 0 - 460Rule Peru 1993 only - Jan 1 0:00 1:00 S 461Rule Peru 1993 only - Apr 1 0:00 0 - 462# Zone NAME GMTOFF RULES FORMAT [UNTIL] 463Zone America/Lima -5:08:12 - LMT 1890 464 -5:09 - LMT 1908 Jul 28 # Lima Mean Time 465 -5:00 Peru PE%sT # Peru Time 466 467# South Georgia 468# Zone NAME GMTOFF RULES FORMAT [UNTIL] 469Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken 470 -2:00 - GST # South Georgia Time 471 472# South Sandwich Is 473# uninhabited 474 475# Suriname 476# Zone NAME GMTOFF RULES FORMAT [UNTIL] 477Zone America/Paramaribo -3:40:40 - LMT 1911 478 -3:40:52 - PMT 1935 # Paramaribo Mean Time 479 -3:40:36 - PMT 1945 Oct # The capital moved? 480 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time 481 -3:30 - SRT 1984 Oct # Suriname Time 482 -3:00 - SRT 483 484# Trinidad and Tobago 485# Zone NAME GMTOFF RULES FORMAT [UNTIL] 486Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2 487 -4:00 - AST 488 489# Uruguay 490# From Paul Eggert <eggert@twinsun.com> (1993-11-18): 491# Uruguay wins the prize for the strangest peacetime manipulation of the rules. 492# From Shanks (1991): 493# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 494# Whitman gives 1923 Oct 1; go with Shanks. 495Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS 496Rule Uruguay 1924 1926 - Apr 1 0:00 0 - 497Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS 498Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS 499# Shanks gives 1935 Apr 1 0:00 and 1936 Mar 30 0:00; go with Whitman. 500Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 - 501Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS 502Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 - 503# Whitman gives 1937 Oct 3; go with Shanks. 504Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS 505# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13, 506# and 1943 Apr 13 ``to present time''; go with Shanks. 507Rule Uruguay 1941 only - Aug 1 0:00 0 - 508Rule Uruguay 1942 only - Jan 1 0:00 0:30 HS 509Rule Uruguay 1942 only - Dec 14 0:00 1:00 S 510Rule Uruguay 1943 only - Mar 14 0:00 0 - 511Rule Uruguay 1959 only - May 24 0:00 1:00 S 512Rule Uruguay 1959 only - Nov 15 0:00 0 - 513Rule Uruguay 1960 only - Jan 17 0:00 1:00 S 514Rule Uruguay 1960 only - Mar 6 0:00 0 - 515Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S 516Rule Uruguay 1965 only - Sep 26 0:00 0 - 517Rule Uruguay 1966 1967 - Oct 31 0:00 0 - 518Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS 519Rule Uruguay 1968 1970 - Dec 2 0:00 0 - 520Rule Uruguay 1972 only - Apr 24 0:00 1:00 S 521Rule Uruguay 1972 only - Aug 15 0:00 0 - 522Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS 523Rule Uruguay 1974 only - Dec 22 0:00 1:00 S 524Rule Uruguay 1976 only - Oct 1 0:00 0 - 525Rule Uruguay 1977 only - Dec 4 0:00 1:00 S 526Rule Uruguay 1978 only - Apr 1 0:00 0 - 527Rule Uruguay 1979 only - Oct 1 0:00 1:00 S 528Rule Uruguay 1980 only - May 1 0:00 0 - 529Rule Uruguay 1987 only - Dec 14 0:00 1:00 S 530Rule Uruguay 1988 only - Mar 14 0:00 0 - 531Rule Uruguay 1988 only - Dec 11 0:00 1:00 S 532Rule Uruguay 1989 only - Mar 12 0:00 0 - 533Rule Uruguay 1989 only - Oct 29 0:00 1:00 S 534Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 - 535Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S 536# Shanks's 4th edition (1995) says no DST was observed in 1990/1 and 1991/2, 537# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA. 538Rule Uruguay 1992 only - Oct 18 0:00 1:00 S 539Rule Uruguay 1993 only - Feb 28 0:00 0 - 540# Zone NAME GMTOFF RULES FORMAT [UNTIL] 541Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 542 -3:44:44 - MMT 1920 May 1 # Montevideo MT 543 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time 544 -3:00 Uruguay UY%sT 545 546# Venezuela 547# Zone NAME GMTOFF RULES FORMAT [UNTIL] 548Zone America/Caracas -4:27:44 - LMT 1890 549 -4:27:44 - CMT 1912 Feb 12 # Caracas Mean Time 550 -4:30 - VET 1965 # Venezuela Time 551 -4:00 - VET 552