DateTime::TimeZone::OlsonDB(3)
NAME
DateTime::TimeZone::OlsonDB - An object to represent an Olson time zone
database
VERSION
version 1.86
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) 2015 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 v5.16.3 2015-03-20 DateTime::TimeZone::OlsonDB(3)
datetime-timezone 1.860 - Generated Tue Mar 24 05:17:39 CDT 2015