105e627dcSAndy Fiddaman# tzdb data for ships at sea and other miscellany 205e627dcSAndy Fiddaman 3503609a9SYuri Pankov# This file is in the public domain, so clarified as of 4503609a9SYuri Pankov# 2009-05-17 by Arthur David Olson. 5503609a9SYuri Pankov 6f915e6d3SRobert Mustacchi# These entries are for uses not otherwise covered by the tz database. 7f915e6d3SRobert Mustacchi# Their main practical use is for platforms like Android that lack 8*e15592c8SRobert Mustacchi# support for POSIX.1-2017-style TZ strings. On such platforms these entries 9f915e6d3SRobert Mustacchi# can be useful if the timezone database is wrong or if a ship or 10f915e6d3SRobert Mustacchi# aircraft at sea is not in a timezone. 11503609a9SYuri Pankov 12503609a9SYuri Pankov# Starting with POSIX 1003.1-2001, the entries below are all 13503609a9SYuri Pankov# unnecessary as settings for the TZ environment variable. E.g., 14503609a9SYuri Pankov# instead of TZ='Etc/GMT+4' one can use the POSIX setting TZ='<-04>+4'. 15503609a9SYuri Pankov# 16503609a9SYuri Pankov# Do not use a POSIX TZ setting like TZ='GMT+4', which is four hours 17503609a9SYuri Pankov# behind GMT but uses the completely misleading abbreviation "GMT". 18503609a9SYuri Pankov 19427b4c5cSAndy Fiddaman# The following zone is used by tzcode functions like gmtime, 20427b4c5cSAndy Fiddaman# which load the "UTC" file to handle seconds properly. 21503609a9SYuri PankovZone Etc/UTC 0 - UTC 22503609a9SYuri Pankov 23f117aa50SRobert Mustacchi# Functions like gmtime load the "GMT" file to handle leap seconds properly. 24f117aa50SRobert Mustacchi# Vanguard section, which works with most .zi parsers. 25f117aa50SRobert Mustacchi#Zone GMT 0 - GMT 26f117aa50SRobert Mustacchi# Rearguard section, for TZUpdater 2.3.2 and earlier. 27f117aa50SRobert MustacchiZone Etc/GMT 0 - GMT 28f117aa50SRobert Mustacchi 29503609a9SYuri Pankov# The following link uses older naming conventions, 30503609a9SYuri Pankov# but it belongs here, not in the file 'backward', 31427b4c5cSAndy Fiddaman# as it is needed for tzcode releases through 2022a, 32427b4c5cSAndy Fiddaman# where functions like gmtime load "GMT" instead of the "Etc/UTC". 33427b4c5cSAndy Fiddaman# We want this to work even on installations that omit 'backward'. 34503609a9SYuri PankovLink Etc/GMT GMT 35f117aa50SRobert Mustacchi# End of rearguard section. 36503609a9SYuri Pankov 37503609a9SYuri Pankov# Be consistent with POSIX TZ settings in the Zone names, 38503609a9SYuri Pankov# even though this is the opposite of what many people expect. 39503609a9SYuri Pankov# POSIX has positive signs west of Greenwich, but many people expect 40503609a9SYuri Pankov# positive signs east of Greenwich. For example, TZ='Etc/GMT+4' uses 41503609a9SYuri Pankov# the abbreviation "-04" and corresponds to 4 hours behind UT 42503609a9SYuri Pankov# (i.e. west of Greenwich) even though many people would expect it to 43503609a9SYuri Pankov# mean 4 hours ahead of UT (i.e. east of Greenwich). 44503609a9SYuri Pankov 45503609a9SYuri Pankov# Earlier incarnations of this package were not POSIX-compliant, 46503609a9SYuri Pankov# and had lines such as 47503609a9SYuri Pankov# Zone GMT-12 -12 - GMT-1200 48503609a9SYuri Pankov# We did not want things to change quietly if someone accustomed to the old 49503609a9SYuri Pankov# way does a 50503609a9SYuri Pankov# zic -l GMT-12 51503609a9SYuri Pankov# so we moved the names into the Etc subdirectory. 52503609a9SYuri Pankov# Also, the time zone abbreviations are now compatible with %z. 53503609a9SYuri Pankov 54503609a9SYuri PankovZone Etc/GMT-14 14 - +14 55503609a9SYuri PankovZone Etc/GMT-13 13 - +13 56503609a9SYuri PankovZone Etc/GMT-12 12 - +12 57503609a9SYuri PankovZone Etc/GMT-11 11 - +11 58503609a9SYuri PankovZone Etc/GMT-10 10 - +10 59503609a9SYuri PankovZone Etc/GMT-9 9 - +09 60503609a9SYuri PankovZone Etc/GMT-8 8 - +08 61503609a9SYuri PankovZone Etc/GMT-7 7 - +07 62503609a9SYuri PankovZone Etc/GMT-6 6 - +06 63503609a9SYuri PankovZone Etc/GMT-5 5 - +05 64503609a9SYuri PankovZone Etc/GMT-4 4 - +04 65503609a9SYuri PankovZone Etc/GMT-3 3 - +03 66503609a9SYuri PankovZone Etc/GMT-2 2 - +02 67503609a9SYuri PankovZone Etc/GMT-1 1 - +01 68503609a9SYuri PankovZone Etc/GMT+1 -1 - -01 69503609a9SYuri PankovZone Etc/GMT+2 -2 - -02 70503609a9SYuri PankovZone Etc/GMT+3 -3 - -03 71503609a9SYuri PankovZone Etc/GMT+4 -4 - -04 72503609a9SYuri PankovZone Etc/GMT+5 -5 - -05 73503609a9SYuri PankovZone Etc/GMT+6 -6 - -06 74503609a9SYuri PankovZone Etc/GMT+7 -7 - -07 75503609a9SYuri PankovZone Etc/GMT+8 -8 - -08 76503609a9SYuri PankovZone Etc/GMT+9 -9 - -09 77503609a9SYuri PankovZone Etc/GMT+10 -10 - -10 78503609a9SYuri PankovZone Etc/GMT+11 -11 - -11 79503609a9SYuri PankovZone Etc/GMT+12 -12 - -12 80