11-20-2005
In theory, it should be easy. You just add an entry to /usr/lib/tztab and set your TZ environment variable to the new entry. If there is no switch into daylight savings time, you do not need any entry in tztab. And the is a "man tztab" to guide you.
But you need to know when the daylight savings shift occurs. That is a real problem with Israel. See
this page for details. Edit: Here is a
file with an entry for 1992-2038. If you go up one level from here you will see an INSTALL file which you should ignore. It is for HP-UX 9.x and it is not a very good procedure even for that OS.
Last edited by Perderabo; 11-20-2005 at 05:03 PM..
Reason: Found a file.
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LEARN ABOUT OSX
datetime::timezone::olsondb
DateTime::TimeZone::OlsonDB(3) User Contributed Perl Documentation DateTime::TimeZone::OlsonDB(3)
NAME
DateTime::TimeZone::OlsonDB - An object to represent an Olson time zone database
VERSION
version 1.51
SYNOPSIS
none yet
DESCRIPTION
This module parses the Olson database time zone definition files and creates various objects representing time zone data.
Each time zone is broken down into several parts. The first piece is an observance, which is an offset from UTC and an abbreviation. A
single zone may contain many observances, reflecting historical changes in that time zone over time. An observance may also refer to a set
of rules.
Rules are named, and may apply to many different zones. For example, the "US" rules apply to most of the time zones in the US,
unsurprisingly. Rules are made of an offset from standard time and a definition of when that offset changes. Changes can be a one time
thing, or they can recur at regular times through a span of years.
Each rule may have an associated letter, which is used to generate an abbreviated name for the time zone, along with the offset's
abbreviation. For example, if the offset's abbreviation is "C%sT", and the a rule specifies the letter "S", then the abbreviation when
that rule is in effect is "CST".
USAGE
Not yet documented. This stuff is a mess.
AUTHOR
Dave Rolsky <autarch@urth.org>
COPYRIGHT AND LICENSE
This software is copyright (c) 2012 by Dave Rolsky.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
perl v5.16.2 2012-10-17 DateTime::TimeZone::OlsonDB(3)