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datetime::timezone::local::win325.18

DateTime::TimeZone::Local::Win32(3)			User Contributed Perl Documentation		       DateTime::TimeZone::Local::Win32(3)

NAME

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

VERSION

       version 1.63

SYNOPSIS

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

	 my $tz = DateTime::TimeZone::Local->TimeZone();

DESCRIPTION

       This module provides methods for determining the local time zone on a Windows platform.

HOW THE TIME ZONE IS DETERMINED

       This class tries the following methods of determining the local time zone:

       o   $ENV{TZ}

	   It checks $ENV{TZ} for a valid time zone name.

       o   Windows Registry

	   When using the registry, we look for the Windows time zone and use a mapping to translate this to an Olson time zone name.

	   o	   Windows Vista and 2008

		   We look in "SYSTEM/CurrentControlSet/Control/TimeZoneInformation/" for a node named "/TimeZoneKeyName". If this exists, we use
		   this key to look up the Olson time zone name in our mapping.

	   o	   Windows NT, Windows 2000, Windows XP, Windows 2003 Server

		   We look in "SOFTWARE/Microsoft/Windows NT/CurrentVersion/Time Zones/" and loop through all of its sub keys.

		   For each sub key, we compare the value of the key with "/Std" appended to the end to the value of
		   "SYSTEM/CurrentControlSet/Control/TimeZoneInformation/StandardName". This gives us the English name of the Windows time zone,
		   which we use to look up the Olson time zone name.

	   o	   Windows 95, Windows 98, Windows Millenium Edition

		   The algorithm is the same as for NT, but we loop through the sub keys of "SOFTWARE/Microsoft/Windows/CurrentVersion/Time
		   Zones/"

AUTHOR

       Dave Rolsky <autarch@urth.org>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2013 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 v5.18.2							    2013-10-28				       DateTime::TimeZone::Local::Win32(3)