[... clock ...]
"The current set of places where it 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 have the Olson files always. Windows and HP-UX need tzdata for full functionality, but can omit it if 8.4-level timezone functionality is adequate ..."
The list of time zones handled by Tcl is:
- adt - Atlantic Daylight
- ahst - Alaska-Hawaii Standard
- ast - Atlantic Standard
- at - Azores
- bst - British Summer
- bt - Baghdad, USSR Zone 2
- cadt - Central Australian Daylight
- cadt - Central Australian Daylight Time
- cadt - Central Australian Standard Time
- cast - Central Australian Standard
- cat - Central Alaska
- cct - China Coast, USSR Zone 7
- cct - China Coast, USSR Zone 7
- cdt - Central Daylight
- cest - Central European Summer
- cet - Central European
- cst - Central Standard
- dst - DST on (hour is ignored)
- eadt - Eastern Australian Daylight
- eadt - Eastern Australian Daylight Time
- eadt - Eastern Australian Standard Time
- east - Eastern Australian Standard
- edt - Eastern Daylight
- eet - Eastern Europe, USSR Zone 1
- est - Eastern Standard
- fst - French Summer
- fwt - French Winter
- gmt - Greenwich Mean
- gst - Guam Standard, USSR Zone 9
- gst - Guam Standard, USSR Zone 9
- hdt - Hawaii Daylight
- hst - Hawaii Standard
- idle - International Date Line East
- idlw - International Date Line West
- ist - Indian Standard
- it - Iran
- jst - Japan Standard, USSR Zone 8
- jt - Java (3pm in Cronusland!)
- mdt - Mountain Daylight
- mest - Middle European Summer
- met - Middle European
- mewt - Middle European Winter
- mst - Mountain Standard
- ndt - Newfoundland Daylight
- nft - Newfoundland
- nst - Newfoundland Standard
- nt - Nome
- nzdt - New Zealand Daylight
- nzst - New Zealand Standard
- nzt - New Zealand
- pdt - Pacific Daylight
- pst - Pacific Standard
- sst - Swedish Summer
- swt - Swedish Winter
- uct - Universal Coordinated Time
- ut - Universal (Coordinated)
- utc
- wadt - West Australian Daylight
- wast - West Australian Standard
- wat - West Africa
- wet - Western European
- ydt - Yukon Daylight
- yst - Yukon Standard
- zp4 - USSR Zone 3
- zp5 - USSR Zone 4
- zp6 - USSR Zone 5