The current set of places where tcl will try to find Olson files is:
/usr/share/zoneinfo
/user/share/lib/zoneinfo
/user/lib/zoneinfo
/user/local/etc/zoneinfo
C:/Progra~1/cygwin/usr/local/etc/zoneinfoThat's what's done if a search for a Tcl time zone definition in $tcl_library/tzdata fails.
In addition, the set of hardcoded time zone names in ::tcl::clock::LegacyTimeZone is recognized, as is any Posix time zone specifier, and the special name 'localtime'.
"...'localtime' is not recommended ..."
"... if -timezone is not supplied, the order of preference is $env(TCL_TZ)*; $env(TZ); the time zone from the Windows registry; :Tcl/Localtime (allowing a site to install its own time zone definition in $tcl_library/tzdata); and :localtime (the C library)"
"... this structure means that Starpacks for Linux and Solaris [and Mac OS X ] can safely omit $tcl_library/tzdata with minimal loss of functionality, since those platforms will have the Olson files. Windows and HP-UX need tzdata for full functionality, but can omit it if 8.4-level timezone functionality is adequate ..."
Tcl 8.5, as of October, 2005, comes with the following set of named time zones:
:Africa/Abidjan :Africa/Accra :Africa/Addis_Ababa :Africa/Algiers :Africa/Asmera :Africa/Bamako :Africa/Bangui :Africa/Banjul :Africa/Bissau :Africa/Blantyre :Africa/Brazzaville :Africa/Bujumbura :Africa/Cairo :Africa/Casablanca :Africa/Ceuta :Africa/Conakry :Africa/Dakar :Africa/Dar_es_Salaam :Africa/Djibouti :Africa/Douala :Africa/El_Aaiun :Africa/Freetown :Africa/Gaborone :Africa/Harare :Africa/Johannesburg :Africa/Kampala :Africa/Khartoum :Africa/Kigali :Africa/Kinshasa :Africa/Lagos :Africa/Libreville :Africa/Lome :Africa/Luanda :Africa/Lubumbashi :Africa/Lusaka :Africa/Malabo :Africa/Maputo :Africa/Maseru :Africa/Mbabane :Africa/Mogadishu :Africa/Monrovia :Africa/Nairobi :Africa/Ndjamena :Africa/Niamey :Africa/Nouakchott :Africa/Ouagadougou :Africa/Porto-Novo :Africa/Sao_Tome :Africa/Timbuktu :Africa/Tripoli :Africa/Tunis :Africa/Windhoek :America/Adak :America/Anchorage :America/Anguilla :America/Antigua :America/Araguaina :America/Argentina/Buenos_Aires :America/Argentina/Catamarca :America/Argentina/ComodRivadavia :America/Argentina/Cordoba :America/Argentina/Jujuy :America/Argentina/La_Rioja :America/Argentina/Mendoza :America/Argentina/Rio_Gallegos :America/Argentina/San_Juan :America/Argentina/Tucuman :America/Argentina/Ushuaia :America/Aruba :America/Asuncion :America/Atka :America/Bahia :America/Barbados :America/Belem :America/Belize :America/Boa_Vista :America/Bogota :America/Boise :America/Buenos_Aires :America/Cambridge_Bay :America/Campo_Grande :America/Cancun :America/Caracas :America/Catamarca :America/Cayenne :America/Cayman :America/Chicago :America/Chihuahua :America/Coral_Harbour :America/Cordoba :America/Costa_Rica :America/Cuiaba :America/Curacao :America/Danmarkshavn :America/Dawson :America/Dawson_Creek :America/Denver :America/Detroit :America/Dominica :America/Edmonton :America/Eirunepe :America/El_Salvador :America/Ensenada :America/Fortaleza :America/Fort_Wayne :America/Glace_Bay :America/Godthab :America/Goose_Bay :America/Grand_Turk :America/Grenada :America/Guadeloupe :America/Guatemala :America/Guayaquil :America/Guyana :America/Halifax :America/Havana :America/Hermosillo :America/Indiana/Indianapolis :America/Indiana/Knox :America/Indiana/Marengo :America/Indiana/Vevay :America/Indianapolis :America/Inuvik :America/Iqaluit :America/Jamaica :America/Jujuy :America/Juneau :America/Kentucky/Louisville :America/Kentucky/Monticello :America/Knox_IN :America/La_Paz :America/Lima :America/Los_Angeles :America/Louisville :America/Maceio :America/Managua :America/Manaus :America/Martinique :America/Mazatlan :America/Mendoza :America/Menominee :America/Merida :America/Mexico_City :America/Miquelon :America/Monterrey :America/Montevideo :America/Montreal :America/Montserrat :America/Nassau :America/New_York :America/Nipigon :America/Nome :America/Noronha :America/North_Dakota/Center :America/Panama :America/Pangnirtung :America/Paramaribo :America/Phoenix :America/Port-au-Prince :America/Porto_Acre :America/Porto_Velho :America/Port_of_Spain :America/Puerto_Rico :America/Rainy_River :America/Rankin_Inlet :America/Recife :America/Regina :America/Rio_Branco :America/Rosario :America/Santiago :America/Santo_Domingo :America/Sao_Paulo :America/Scoresbysund :America/Shiprock :America/St_Johns :America/St_Kitts :America/St_Lucia :America/St_Thomas :America/St_Vincent :America/Swift_Current :America/Tegucigalpa :America/Thule :America/Thunder_Bay :America/Tijuana :America/Toronto :America/Tortola :America/Vancouver :America/Virgin :America/Whitehorse :America/Winnipeg :America/Yakutat :America/Yellowknife :Antarctica/Casey :Antarctica/Davis :Antarctica/DumontDUrville :Antarctica/Mawson :Antarctica/McMurdo :Antarctica/Palmer :Antarctica/Rothera :Antarctica/South_Pole :Antarctica/Syowa :Antarctica/Vostok :Arctic/Longyearbyen :Asia/Aden :Asia/Almaty :Asia/Amman :Asia/Anadyr :Asia/Aqtau :Asia/Aqtobe :Asia/Ashgabat :Asia/Ashkhabad :Asia/Baghdad :Asia/Bahrain :Asia/Baku :Asia/Bangkok :Asia/Beirut :Asia/Bishkek :Asia/Brunei :Asia/Calcutta :Asia/Choibalsan :Asia/Chongqing :Asia/Chungking :Asia/Colombo :Asia/Dacca :Asia/Damascus :Asia/Dhaka :Asia/Dili :Asia/Dubai :Asia/Dushanbe :Asia/Gaza :Asia/Harbin :Asia/Hong_Kong :Asia/Hovd :Asia/Irkutsk :Asia/Istanbul :Asia/Jakarta :Asia/Jayapura :Asia/Jerusalem :Asia/Kabul :Asia/Kamchatka :Asia/Karachi :Asia/Kashgar :Asia/Katmandu :Asia/Krasnoyarsk :Asia/Kuala_Lumpur :Asia/Kuching :Asia/Kuwait :Asia/Macao :Asia/Macau :Asia/Magadan :Asia/Makassar :Asia/Manila :Asia/Muscat :Asia/Nicosia :Asia/Novosibirsk :Asia/Omsk :Asia/Oral :Asia/Phnom_Penh :Asia/Pontianak :Asia/Pyongyang :Asia/Qatar :Asia/Qyzylorda :Asia/Rangoon :Asia/Riyadh :Asia/Saigon :Asia/Sakhalin :Asia/Samarkand :Asia/Seoul :Asia/Shanghai :Asia/Singapore :Asia/Taipei :Asia/Tashkent :Asia/Tbilisi :Asia/Tehran :Asia/Tel_Aviv :Asia/Thimbu :Asia/Thimphu :Asia/Tokyo :Asia/Ujung_Pandang :Asia/Ulaanbaatar :Asia/Ulan_Bator :Asia/Urumqi :Asia/Vientiane :Asia/Vladivostok :Asia/Yakutsk :Asia/Yekaterinburg :Asia/Yerevan :Atlantic/Azores :Atlantic/Bermuda :Atlantic/Canary :Atlantic/Cape_Verde :Atlantic/Faeroe :Atlantic/Jan_Mayen :Atlantic/Madeira :Atlantic/Reykjavik :Atlantic/South_Georgia :Atlantic/Stanley :Atlantic/St_Helena :Australia/ACT :Australia/Adelaide :Australia/Brisbane :Australia/Broken_Hill :Australia/Canberra :Australia/Currie :Australia/Darwin :Australia/Hobart :Australia/LHI :Australia/Lindeman :Australia/Lord_Howe :Australia/Melbourne :Australia/North :Australia/NSW :Australia/Perth :Australia/Queensland :Australia/South :Australia/Sydney :Australia/Tasmania :Australia/Victoria :Australia/West :Australia/Yancowinna :Brazil/Acre :Brazil/DeNoronha :Brazil/East :Brazil/West :Canada/Atlantic :Canada/Central :Canada/East-Saskatchewan :Canada/Eastern :Canada/Mountain :Canada/Newfoundland :Canada/Pacific :Canada/Saskatchewan :Canada/Yukon :CET :Chile/Continental :Chile/EasterIsland :CST6CDT :Cuba :EET :Egypt :Eire :EST :EST5EDT :Etc/GMT :Etc/GMT+0 :Etc/GMT+1 :Etc/GMT+10 :Etc/GMT+11 :Etc/GMT+12 :Etc/GMT+2 :Etc/GMT+3 :Etc/GMT+4 :Etc/GMT+5 :Etc/GMT+6 :Etc/GMT+7 :Etc/GMT+8 :Etc/GMT+9 :Etc/GMT-0 :Etc/GMT-1 :Etc/GMT-10 :Etc/GMT-11 :Etc/GMT-12 :Etc/GMT-13 :Etc/GMT-14 :Etc/GMT-2 :Etc/GMT-3 :Etc/GMT-4 :Etc/GMT-5 :Etc/GMT-6 :Etc/GMT-7 :Etc/GMT-8 :Etc/GMT-9 :Etc/GMT0 :Etc/Greenwich :Etc/UCT :Etc/Universal :Etc/UTC :Etc/Zulu :Europe/Amsterdam :Europe/Andorra :Europe/Athens :Europe/Belfast :Europe/Belgrade :Europe/Berlin :Europe/Bratislava :Europe/Brussels :Europe/Bucharest :Europe/Budapest :Europe/Chisinau :Europe/Copenhagen :Europe/Dublin :Europe/Gibraltar :Europe/Helsinki :Europe/Istanbul :Europe/Kaliningrad :Europe/Kiev :Europe/Lisbon :Europe/Ljubljana :Europe/London :Europe/Luxembourg :Europe/Madrid :Europe/Malta :Europe/Mariehamn :Europe/Minsk :Europe/Monaco :Europe/Moscow :Europe/Nicosia :Europe/Oslo :Europe/Paris :Europe/Prague :Europe/Riga :Europe/Rome :Europe/Samara :Europe/San_Marino :Europe/Sarajevo :Europe/Simferopol :Europe/Skopje :Europe/Sofia :Europe/Stockholm :Europe/Tallinn :Europe/Tirane :Europe/Tiraspol :Europe/Uzhgorod :Europe/Vaduz :Europe/Vatican :Europe/Vienna :Europe/Vilnius :Europe/Warsaw :Europe/Zagreb :Europe/Zaporozhye :Europe/Zurich :GB :GB-Eire :GMT :GMT+0 :GMT-0 :GMT0 :Greenwich :Hongkong :HST :Iceland :Indian/Antananarivo :Indian/Chagos :Indian/Christmas :Indian/Cocos :Indian/Comoro :Indian/Kerguelen :Indian/Mahe :Indian/Maldives :Indian/Mauritius :Indian/Mayotte :Indian/Reunion :Iran :Israel :Jamaica :Japan :Kwajalein :Libya :MET :Mexico/BajaNorte :Mexico/BajaSur :Mexico/General :MST :MST7MDT :Navajo :NZ :NZ-CHAT :Pacific/Apia :Pacific/Auckland :Pacific/Chatham :Pacific/Easter :Pacific/Efate :Pacific/Enderbury :Pacific/Fakaofo :Pacific/Fiji :Pacific/Funafuti :Pacific/Galapagos :Pacific/Gambier :Pacific/Guadalcanal :Pacific/Guam :Pacific/Honolulu :Pacific/Johnston :Pacific/Kiritimati :Pacific/Kosrae :Pacific/Kwajalein :Pacific/Majuro :Pacific/Marquesas :Pacific/Midway :Pacific/Nauru :Pacific/Niue :Pacific/Norfolk :Pacific/Noumea :Pacific/Pago_Pago :Pacific/Palau :Pacific/Pitcairn :Pacific/Ponape :Pacific/Port_Moresby :Pacific/Rarotonga :Pacific/Saipan :Pacific/Samoa :Pacific/Tahiti :Pacific/Tarawa :Pacific/Tongatapu :Pacific/Truk :Pacific/Wake :Pacific/Wallis :Pacific/Yap :Poland :Portugal :PRC :PST8PDT :ROC :ROK :Singapore :SystemV/AST4 :SystemV/AST4ADT :SystemV/CST6 :SystemV/CST6CDT :SystemV/EST5 :SystemV/EST5EDT :SystemV/HST10 :SystemV/MST7 :SystemV/MST7MDT :SystemV/PST8 :SystemV/PST8PDT :SystemV/YST9 :SystemV/YST9YDT :Turkey :UCT :Universal :US/Alaska :US/Aleutian :US/Arizona :US/Central :US/East-Indiana :US/Eastern :US/Hawaii :US/Indiana-Starke :US/Michigan :US/Mountain :US/Pacific :US/Pacific-New :US/Samoa :UTC :W-SU :WET :Zulu
The list of legacy time zones handled by Tcl is:
RS 2007-01-03 - Here's a little routine to collect the timezones known to Windows:
proc timezone {{what ""}} {
set k {HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Time Zones}
set res {}
foreach i [registry keys $k] {
set it [registry get $k\\$i Display]
if {$what eq "" || [string match *$what* $it]} {
lappend res $it
}
}
lsort -dict $res
}Test:
% timezone Moscow
{(GMT+03:00) Moscow, St. Petersburg, Volgograd}
% timezone Beijing
{(GMT+08:00) Beijing, Chongqing, Hong Kong, Urumqi}Without arguments, it returns something like
{(GMT) Casablanca, Monrovia} {(GMT) Greenwich Mean Time : Dublin, Edinburgh, Lisbon, London} {(GMT+01:00) Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna} {(GMT+01:00) Belgrade, Bratislava, Budapest, Ljubljana, Prague} {(GMT+01:00) Brussels, Copenhagen, Madrid, Paris} {(GMT+01:00) Sarajevo, Skopje, Warsaw, Zagreb} {(GMT+01:00) West Central Africa} {(GMT+02:00) Athens, Beirut, Istanbul, Minsk} {(GMT+02:00) Bucharest} {(GMT+02:00) Cairo} {(GMT+02:00) Harare, Pretoria} {(GMT+02:00) Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius} {(GMT+02:00) Jerusalem} {(GMT+03:00) Baghdad} ...
See also http://home.tiscali.nl/~t876506/TZworld.html
Another example fragment (due to KBK [L1 ]) that illustrates the power of 8.5:
% clock format [clock seconds] -format "%Z %z" \
-timezone :America/New_York
EDT -0400