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DateTime::TimeZone::Local::Win3User Contributed Perl DocumentaDateTime::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 v5.16.3				    2013-10-28	      DateTime::TimeZone::Local::Win32(3)
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