Content-type: text/html Man page of DateTime::TimeZone::Local::Win32

DateTime::TimeZone::Local::Win32

Section: User Contributed Perl Documentation (3pm)
Updated: 2009-08-18
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NAME

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

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:
$ENV{TZ}

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

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.

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.

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.

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, <[email protected]>  

COPYRIGHT & LICENSE

Copyright (c) 2003-2008 David Rolsky. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

The full text of the license can be found in the LICENSE file included with this module.


 

Index

NAME
SYNOPSIS
DESCRIPTION
HOW THE TIME ZONE IS DETERMINED
AUTHOR
COPYRIGHT & LICENSE

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Time: 04:14:13 GMT, September 24, 2010