Windows Time Zone Update - New Daylight Savings Time Rules

This update will allow for the Windows XP, 2000, and 2003 versions to include the recently passed DST changes.  These changes appear to be included in Vista Gold.  This special update must be manually downloaded and applied (as it's not included in Windows Update).  If users don't apply these changes, they'll have to manually change times to accommodate for the new DST rules. 

Windows Time Zone Update - New Daylight Savings Time Rules
http://support.microsoft.com/kb/928388

QUOTE: Starting in the spring of 2007, daylight saving time (DST) start and end dates for the United States will transition to comply with the Energy Policy Act of 2005. DST dates in the United States will start three weeks earlier (2:00 A.M. on the second Sunday in March) and will end one week later (2:00 A.M. on the first Sunday in November).

The update that this article describes changes the time zone data to account for the United States DST change. This time zone update will also include changes for other related DST changes, time zone behavior, and settings. Some of these changes will occur in 2007, and some have occurred since these versions of Windows were originally released.