1DateTime::TimeZone::LocUasle:r:WCionn3t2r(i3b)uted PerlDDaotceuTmiemnet:a:tTiiomneZone::Local::Win32(3)
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NAME

6       DateTime::TimeZone::Local::Win32 - Determine the local system's time
7       zone on Windows
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VERSION

10       version 1.42
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SYNOPSIS

13         my $tz = DateTime::TimeZone->new( name => 'local' );
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15         my $tz = DateTime::TimeZone::Local->TimeZone();
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DESCRIPTION

18       This module provides methods for determining the local time zone on a
19       Windows platform.
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HOW THE TIME ZONE IS DETERMINED

22       This class tries the following methods of determining the local time
23       zone:
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25       ·   $ENV{TZ}
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27           It checks $ENV{TZ} for a valid time zone name.
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29       ·   Windows Registry
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31           When using the registry, we look for the Windows time zone and use
32           a mapping to translate this to an Olson time zone name.
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34           ·       Windows Vista and 2008
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36                   We look in
37                   "SYSTEM/CurrentControlSet/Control/TimeZoneInformation/" for
38                   a node named "/TimeZoneKeyName". If this exists, we use
39                   this key to look up the Olson time zone name in our
40                   mapping.
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42           ·       Windows NT, Windows 2000, Windows XP, Windows 2003 Server
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44                   We look in "SOFTWARE/Microsoft/Windows
45                   NT/CurrentVersion/Time Zones/" and loop through all of its
46                   sub keys.
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48                   For each sub key, we compare the value of the key with
49                   "/Std" appended to the end to the value of
50                   "SYSTEM/CurrentControlSet/Control/TimeZoneInformation/StandardName".
51                   This gives us the English name of the Windows time zone,
52                   which we use to look up the Olson time zone name.
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54           ·       Windows 95, Windows 98, Windows Millenium Edition
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56                   The algorithm is the same as for NT, but we loop through
57                   the sub keys of
58                   "SOFTWARE/Microsoft/Windows/CurrentVersion/Time Zones/"
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AUTHOR

61       Dave Rolsky <autarch@urth.org>
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64       This software is copyright (c) 2011 by Dave Rolsky.
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66       This is free software; you can redistribute it and/or modify it under
67       the same terms as the Perl 5 programming language system itself.
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71perl v5.12.4                      2011-11-07DateTime::TimeZone::Local::Win32(3)
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