southamerica revision 19878
150477Speter# @(#)southamerica 7.14 243561Skato 3128736Snyan# This data is by no means authoritative; if you think you know better, 4125625Snyan# go ahead and edit the file (and please send any changes to 5264400Simp# tz@elsie.nci.nih.gov for general use in the future). 6125780Snyan 7125625Snyan# From Paul Eggert <eggert@twinsun.com> (1996-09-03): 8125780Snyan# A good source for time zone historical data outside the U.S. is 9235264Savg# Thomas G. Shanks, The International Atlas (3rd edition), 1043561Skato# San Diego: ACS Publications, Inc. (1991). 1158871Skato# Except where otherwise noted, it is the source for the data below. 12125780Snyan# 1358871Skato# The following abbreviations are used in this file. 1443561Skato# Corrections are welcome! 15208789Sed# std dst 1643561Skato# LMT Local Mean Time 1743561Skato# -2:00 FST FDT Fernando de Noronha 18232263Sdim# -3:00 EST EDT Eastern Brazil 19232263Sdim# -4:00 WST WDT Western Brazil 20232263Sdim# -4:00 AST ADT Atlantic 21# -5:00 AST ADT Acre 22# 23# See the `africa' file for time zone naming and abbreviation conventions. 24# Earlier editions of these tables used the North American style (e.g. ARST and 25# ARDT for Argentine Standard and Daylight Time), but the following quote 26# suggests that it's better to use European style (e.g. ART and ARST). 27# I suggest the use of _Summer time_ instead of the more cumbersome 28# _daylight-saving time_. _Summer time_ seems to be in general use 29# in Europe and South America. 30# -- E O Cutler, _New York Times_ (1937-02-14), quoted in 31# H L Mencken, _The American Language: Supplement I_ (1960), p 466 32 33 34# From Guy Harris: 35# From Official Airline Guide - Worldwide Edition (1987). Countries not 36# listed here do not observe DST, according to the OAG. Time zone names 37# are pure inventions, and none are supplied for countries not observing 38# DST; updates from natives would be appreciated. The times that DST 39# starts and ends are based on the assumption that they switch a 2AM just 40# as everybody else does. 41 42############################################################################### 43 44############################################################################### 45 46# Argentina 47 48# From Bob Devine (1988-01-28): 49# Argentina: first Sunday in October to first Sunday in April since 1976. 50# Double Summer time from 1969 to 1974. Switches at midnight. 51 52# From U. S. Naval Observatory (1988-01-199): 53# ARGENTINA 3 H BEHIND UTC 54 55# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): 56# I am sending modifications to the Argentinian time zone table... 57# AR was chosen because they are the ISO letters that represent Argentina. 58 59# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 60Rule Arg 1930 only - Dec 1 0:00 1:00 S 61Rule Arg 1931 only - Apr 1 0:00 0 - 62Rule Arg 1931 only - Oct 15 0:00 1:00 S 63Rule Arg 1932 1940 - Mar 1 0:00 0 - 64Rule Arg 1932 1939 - Nov 1 0:00 1:00 S 65Rule Arg 1940 only - Jul 1 0:00 1:00 S 66Rule Arg 1941 only - Jun 15 0:00 0 - 67Rule Arg 1941 only - Oct 15 0:00 1:00 S 68Rule Arg 1943 only - Aug 1 0:00 0 - 69Rule Arg 1943 only - Oct 15 0:00 1:00 S 70Rule Arg 1946 only - Mar 1 0:00 0 - 71Rule Arg 1946 only - Oct 1 0:00 1:00 S 72Rule Arg 1963 only - Oct 1 0:00 0 - 73Rule Arg 1963 only - Dec 15 0:00 1:00 S 74Rule Arg 1964 1966 - Mar 1 0:00 0 - 75Rule Arg 1964 1966 - Oct 15 0:00 1:00 S 76Rule Arg 1967 only - Apr 1 0:00 0 - 77Rule Arg 1967 1968 - Oct Sun<=7 0:00 1:00 S 78Rule Arg 1968 1969 - Apr Sun<=7 0:00 0 - 79Rule Arg 1974 only - Jan 23 0:00 1:00 S 80Rule Arg 1974 only - May 1 0:00 0 - 81Rule Arg 1974 1976 - Oct Sun<=7 0:00 1:00 S 82Rule Arg 1975 1977 - Apr Sun<=7 0:00 0 - 83Rule Arg 1985 only - Nov 2 0:00 1:00 S 84Rule Arg 1986 only - Mar 14 0:00 0 - 85Rule Arg 1986 1987 - Oct 25 0:00 1:00 S 86Rule Arg 1987 only - Feb 13 0:00 0 - 87Rule Arg 1988 only - Feb 7 0:00 0 - 88Rule Arg 1988 only - Dec 1 0:00 1:00 S 89# 90# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): 91# These corrections were contributed by InterSoft Argentina S.A., 92# obtaining the data from the: 93# Talleres de Hidrografia Naval Argentina 94# (Argentinian Naval Hydrography Institute) 95# 96# Shanks gives 1989 Mar 16 and stops after 1990 Mar 4; go with Otero. 97Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 - 98Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S 99# 100# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): 101# From this moment on, the law that mandated the daylight saving 102# time corrections was derogated and no more modifications 103# to the time zones (for daylight saving) are now made. 104# 105# Zone NAME GMTOFF RULES FORMAT [UNTIL] 106Zone America/Buenos_Aires -3:53:48 - LMT 1894 Nov 107 -4:16:44 - CMT 1920 May # Cordoba Mean Time 108 -4:00 - ART 1930 Dec 109 -4:00 Arg AR%sT 1969 Oct 5 110 -3:00 Arg AR%sT 111 112# Aruba 113# Zone NAME GMTOFF RULES FORMAT [UNTIL] 114Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad 115 -4:30 - ANT 1965 # Netherlands Antilles Time 116 -4:00 - AST 117 118# Bolivia 119# Zone NAME GMTOFF RULES FORMAT [UNTIL] 120Zone America/La_Paz -4:32:36 - LMT 1890 121 -4:32:36 - LPMT 1931 Oct 15 # La Paz Mean Time 122 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST 123 -4:00 - BOT # Bolivia Time 124 125# Brazil 126 127# From Guy Harris: 128# The OAG lists 1987-10-25 and 1988-02-12 as the starting and 129# ending dates, giving them as "estimated date(s) based on previous year". We 130# infer a rule here from one example, always a dangerous practice.... Yes, 131# they really do switch on Saturday, according to the OAG. 132# "[America/Porto_Acre]" is for the Territory of Acre; 133# "[America/Noronha]" is for Fernando De Noronha. 134 135# From Bob Devine (1988-01-28): 136# The only information I found is that there was no DST up to 1985. 137# But there was some before 1952! 138 139# From U. S. Naval Observatory (1989-01-16): 140# BRAZIL WEST 5 H BEHIND UTC TERRITORY OF ACRE 141# BRAZIL WEST 4 H BEHIND UTC ACRE OCT 23, '88-FEB 11, 142# BRAZIL '89 (ESTIMATED) 143# BRAZIL CENTRAL 4 H BEHIND UTC MANAUS 144# BRAZIL CENTRAL 3 H BEHIND UTC MANAUS OCT 23, '88-FEB 11, 145# BRAZIL CENTRAL '89 (ESTIMATED) 146# BRAZIL EAST 3 H BEHIND UTC COASTAL STATES, RIO, SAO 147# BRAZIL EAST PAULO, BRASILIA 148# BRAZIL EAST 2 H BEHIND UTC COASTAL STATES, RIO, SAO 149# BRAZIL PAULO, BRASILIA OCT 23, 150# BRAZIL '88-FEB 11, '89 151# BRAZIL (ESTIMATED) 152# BRAZIL 2 H BEHIND UTC ATLANTIC ISLANDS, FERNANDO 153# BRAZIL DE NORONHA 154# BRAZIL 1 H BEHIND UTC OCT 23, '88-FEB 11, '89 155# BRAZIL (ESTIMATED) 156# BRAZIL 3 H BEHIND UTC FOR MOST MAJOR AIRPORTS. 157 158# From Paul Eggert <eggert@twinsun.com> (1993-11-18): 159# The mayor of Rio recently attempted to change the time zone rules 160# just in his city, in order to leave more summer time for the tourist trade. 161# The rule change lasted only part of the day; 162# the federal government refused to follow the city's rules, and business 163# was in a chaos, so the mayor backed down that afternoon. 164# Shanks claims Acre stopped observing DST after 1988 Feb 7, but it 165# could just be that his table ran out of room. We're extrapolating 166# about time zone changes after 1990 Feb 11. 167 168# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 169Rule Brazil 1931 only - Oct 3 11:00 1:00 D 170Rule Brazil 1932 1933 - Apr 1 0:00 0 S 171Rule Brazil 1932 only - Oct 3 0:00 1:00 D 172Rule Brazil 1949 1952 - Dec 1 0:00 1:00 D 173Rule Brazil 1950 only - Apr 16 0:00 0 S 174Rule Brazil 1951 1953 - Apr 1 0:00 0 S 175Rule Brazil 1963 only - Dec 9 0:00 1:00 D 176Rule Brazil 1964 only - Mar 1 0:00 0 S 177Rule Brazil 1965 only - Jan 31 0:00 1:00 D 178Rule Brazil 1965 only - Apr 1 0:00 0 S 179Rule Brazil 1965 only - Dec 1 0:00 1:00 D 180Rule Brazil 1966 1968 - Mar 1 0:00 0 S 181Rule Brazil 1966 1967 - Nov 1 0:00 1:00 D 182Rule Brazil 1985 only - Nov 2 0:00 1:00 D 183Rule Brazil 1986 only - Mar 15 0:00 0 S 184Rule Brazil 1986 1987 - Oct Sat<=28 0:00 1:00 D 185Rule Brazil 1987 only - Feb 14 0:00 0 S 186Rule Brazil 1988 only - Feb 7 0:00 0 S 187Rule Brazil 1989 only - Jan 22 0:00 0 S 188Rule Brazil 1988 max - Oct Sun>=15 0:00 1:00 D 189Rule Brazil 1990 max - Feb Sun>=8 0:00 0 S 190# Zone NAME GMTOFF RULES FORMAT [UNTIL] 191Zone America/Noronha -2:09:40 - LMT 1914 192 -2:00 - FST 1963 Dec 9 193 -2:00 Brazil F%sT 194Zone America/Sao_Paulo -3:06:28 - LMT 1914 195 -3:00 Brazil E%sT 196Zone America/Manaus -4:00:04 - LMT 1914 197 -4:00 - WST 1963 Dec 9 198 -4:00 Brazil W%sT 199# Rio_Branco is too ambiguous, since there's a Rio Branco in Uruguay too. 200Zone America/Porto_Acre -4:31:12 - LMT 1914 201 -5:00 - AST 1963 Dec 9 202 -5:00 Brazil A%sT 203# 204# Martin Vaz and Trinidade are like America/Noronha. 205 206 207# Chile 208 209# From Eduardo Krell (1995-10-19): 210# The law says to switch to DST at midnight [24:00] on the second SATURDAY 211# of October.... The law is the same for March and October. 212 213# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 214Rule Chile 1918 only - Sep 1 0:00 1:00 S 215Rule Chile 1919 only - Jul 2 0:00 0 - 216Rule Chile 1927 1931 - Sep 1 0:00 1:00 S 217Rule Chile 1928 1932 - Apr 1 0:00 0 - 218Rule Chile 1969 max - Oct Sun>=9 0:00 1:00 S 219Rule Chile 1970 max - Mar Sun>=9 0:00 0 - 220# Zone NAME GMTOFF RULES FORMAT [UNTIL] 221Zone America/Santiago -4:42:40 - LMT 1890 222 -4:42:40 - SMT 1910 # Santiago Mean Time 223 -5:00 Chile CL%sT 1932 Sep # Chile Time 224 -4:00 Chile CL%sT 225Zone Pacific/Easter -7:17:28 - LMT 1890 # Mataveri 226 -7:17:28 - MMT 1932 Sep # Mataveri Mean Time 227 -7:00 Chile EAS%sT 1982 Mar 14 # Easter I Time 228 -6:00 Chile EAS%sT 229# 230# Whitman says Juan Fernandez Is are like America/Santiago. 231# San Ambrosio, San Felix 232# no information; probably like America/Santiago 233 234 235# Colombia 236# Zone NAME GMTOFF RULES FORMAT [UNTIL] 237Zone America/Bogota -4:56:20 - LMT 1884 Mar 13 238 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time 239 -5:00 - COT # Colombia Time 240# Malpelo, Providencia, San Andres 241# no information; probably like America/Bogota 242 243# Curacao 244# Zone NAME GMTOFF RULES FORMAT [UNTIL] 245Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad 246 -4:30 - ANT 1965 # Netherlands Antilles Time 247 -4:00 - AST 248 249# Ecuador 250# Zone NAME GMTOFF RULES FORMAT [UNTIL] 251Zone America/Guayaquil -5:19:20 - LMT 1890 252 -5:14:00 - QMT 1931 # Quito Mean Time 253 -5:00 - ECT # Ecuador Time 254Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno 255 -5:00 - ECT 1986 256 -6:00 - GALT # Galapagos Time 257 258# Falklands 259# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 260Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S 261Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 262Rule Falk 1939 only - Oct 1 0:00 1:00 S 263Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S 264Rule Falk 1943 only - Jan 1 0:00 0 - 265Rule Falk 1983 only - Sep lastSun 0:00 1:00 S 266Rule Falk 1984 1985 - Apr lastSun 0:00 0 - 267Rule Falk 1984 only - Sep 16 0:00 1:00 S 268Rule Falk 1985 max - Sep Sun>=9 0:00 1:00 S 269Rule Falk 1986 max - Apr Sun>=16 0:00 0 - 270# Zone NAME GMTOFF RULES FORMAT [UNTIL] 271Zone Atlantic/Stanley -3:51:24 - LMT 1890 272 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 273 -4:00 Falk FK%sT 1983 May # Falkland Is Time 274 -3:00 Falk FK%sT 1985 Sep 15 275 -4:00 Falk FK%sT 276 277# French Guiana 278# Zone NAME GMTOFF RULES FORMAT [UNTIL] 279Zone America/Cayenne -3:29:20 - LMT 1911 Jul 280 -4:00 - GFT 1967 Oct # French Guiana Time 281 -3:00 - GFT 282 283# Guyana 284# Zone NAME GMTOFF RULES FORMAT [UNTIL] 285Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown 286 -3:45 - GBGT 1966 May 26 # Br Guiana Time 287 -3:45 - GYT 1975 Jul 31 # Guyana Time 288 -3:00 - GYT 289 290 291# Paraguay 292 293# From Bob Devine (1988-01-28): 294# Paraguay: First day in October to last in March. Midnight switch?? 295# Since 1980. 296 297# From U. S. Naval Observatory (1989-01-19): 298# PARAGUAY 4 H BEHIND UTC 299# PARAGUAY 3 H BEHIND UTC OCT 1, '88-MAR 31, '89 300 301# From Shanks (1991): 302# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 303Rule Para 1975 1978 - Oct 1 0:00 1:00 S 304Rule Para 1975 1978 - Mar 1 0:00 0 - 305# Shanks says 1979 was all DST. 306Rule Para 1980 max - Apr 1 0:00 0 - 307Rule Para 1980 1988 - Oct 1 0:00 1:00 S 308Rule Para 1989 only - Oct 22 0:00 1:00 S 309Rule Para 1990 max - Oct 1 0:00 1:00 S 310# Zone NAME GMTOFF RULES FORMAT [UNTIL] 311Zone America/Asuncion -3:50:40 - LMT 1890 312 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time 313 -4:00 - PYT 1972 Oct # Paraguay Time 314 -3:00 - PYT 1974 Apr 315 -4:00 Para PY%sT 316 317# Peru 318# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 319Rule Peru 1938 only - Jan 1 0:00 1:00 S 320Rule Peru 1938 only - Apr 1 0:00 0 - 321Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S 322Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 323Rule Peru 1987 only - Jan 1 0:00 1:00 S 324Rule Peru 1987 only - Apr 1 0:00 0 - 325Rule Peru 1990 only - Jan 1 0:00 1:00 S 326Rule Peru 1990 only - Apr 1 0:00 0 - 327# Zone NAME GMTOFF RULES FORMAT [UNTIL] 328Zone America/Lima -5:08:12 - LMT 1890 329 -5:09 - LMT 1908 Jul 28 # Lima Mean Time 330 -5:00 Peru PE%sT # Peru Time 331 332# South Georgia 333# Zone NAME GMTOFF RULES FORMAT [UNTIL] 334Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken 335 -2:00 - GST # South Georgia Time 336 337# South Sandwich Is 338# uninhabited 339 340# Suriname 341# Zone NAME GMTOFF RULES FORMAT [UNTIL] 342Zone America/Paramaribo -3:40:40 - LMT 1911 343 -3:40:52 - PMT 1935 # Paramaribo Mean Time 344 -3:40:36 - PMT 1945 Oct # The capital moved? 345 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time 346 -3:30 - SRT 1984 Oct # Suriname Time 347 -3:00 - SRT 348 349# Trinidad and Tobago 350# Zone NAME GMTOFF RULES FORMAT [UNTIL] 351Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2 352 -4:00 - AST 353 354# Uruguay 355# From Paul Eggert <eggert@twinsun.com> (1993-11-18): 356# Uruguay wins the prize for the strangest peacetime manipulation of the rules. 357# From Shanks (1991): 358# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 359# Whitman gives 1923 Oct 1; go with Shanks. 360Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS 361Rule Uruguay 1924 1926 - Apr 1 0:00 0 - 362Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS 363Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS 364# Shanks gives 1935 Apr 1 0:00 and 1936 Mar 30 0:00; go with Whitman. 365Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 - 366Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS 367Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 - 368# Whitman gives 1937 Oct 3; go with Shanks. 369Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS 370# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13, 371# and 1943 Apr 13 ``to present time''; go with Shanks. 372Rule Uruguay 1941 only - Aug 1 0:00 0 - 373Rule Uruguay 1942 only - Jan 1 0:00 0:30 HS 374Rule Uruguay 1942 only - Dec 14 0:00 1:00 S 375Rule Uruguay 1943 only - Mar 14 0:00 0 - 376Rule Uruguay 1959 only - May 24 0:00 1:00 S 377Rule Uruguay 1959 only - Nov 15 0:00 0 - 378Rule Uruguay 1960 only - Jan 17 0:00 1:00 S 379Rule Uruguay 1960 only - Mar 6 0:00 0 - 380Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S 381Rule Uruguay 1965 only - Sep 26 0:00 0 - 382Rule Uruguay 1966 1967 - Oct 31 0:00 0 - 383Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS 384Rule Uruguay 1968 1970 - Dec 2 0:00 0 - 385Rule Uruguay 1972 only - Apr 24 0:00 1:00 S 386Rule Uruguay 1972 only - Aug 15 0:00 0 - 387Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS 388Rule Uruguay 1974 only - Dec 22 0:00 1:00 S 389Rule Uruguay 1976 only - Oct 1 0:00 0 - 390Rule Uruguay 1977 only - Dec 4 0:00 1:00 S 391Rule Uruguay 1978 only - Apr 1 0:00 0 - 392Rule Uruguay 1979 only - Oct 1 0:00 1:00 S 393Rule Uruguay 1980 only - May 1 0:00 0 - 394Rule Uruguay 1987 only - Dec 14 0:00 1:00 S 395Rule Uruguay 1988 only - Mar 14 0:00 0 - 396Rule Uruguay 1988 only - Dec 11 0:00 1:00 S 397Rule Uruguay 1989 only - Mar 12 0:00 0 - 398Rule Uruguay 1989 only - Oct 29 0:00 1:00 S 399Rule Uruguay 1990 only - Mar 4 0:00 0 - 400# Zone NAME GMTOFF RULES FORMAT [UNTIL] 401Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 402 -3:44:44 - MMT 1920 May 1 # Montevideo MT 403 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time 404 -3:00 Uruguay UY%sT 405 406# Venezuela 407# Zone NAME GMTOFF RULES FORMAT [UNTIL] 408Zone America/Caracas -4:27:44 - LMT 1890 409 -4:27:44 - CMT 1912 Feb 12 # Caracas Mean Time 410 -4:30 - VET 1965 # Venezuela Time 411 -4:00 - VET 412