As reported in various publications, including Daily Times, Pakistan has announced the start of DST for 2009 on April 15th at midnight. This information is subject to change as it has not been officially confirmed by a Pakistani government source.
Last Monday a hotfix was released to implement this change for Windows Vista and Windows Server 2008. The update is now also available for Windows XP and Windows Server 2003. If interested in downloading this hotfix, please refer to KB 970084 titled: “A hotfix is available to update the Daylight Saving Time for the "(GMT +5:00) Islamabad, Karachi" time zone for the year 2009 for Windows XP-based, Windows Server 2003-based, Windows Vista-based and Windows Server 2008-based computers”.