If you're in the United States, chances are you've already heard about Daylight Saving Time (DST) occurring 3 weeks early this year. This is due to the Energy Policy Act of 2005, so it's not new news, but a lot of systems and applications are only now getting the updates. The Energy Policy Act of 2005 changes DST to start on the 2nd Sunday in March instead of the first Sunday in April. In addition, it now lasts one week longer, ending the first Sunday of November instead of the last Sunday in October. For this year that means DST starts on March 11.
For the most part SQL Server isn't affected. The only SQL Server component which is happens to be Notification Services. You can find information on how to update Notification Services here:
Though most SQL Server components aren't affected, the operating system on which SQL Server is installed does need to be updated (with the exception of Vista). For Windows XP and 2003 there is a patch available. You can grab the update for these operating systems here:
February 2007 cumulative time zone update for Microsoft Windows operating systems (931836)
Windows 2000, since it has passed into Extended support, does not have a publically available update. As a result, these systems must be updated by making modification to the registry. More information can be found here:
How to configure daylight saving time for the United States in 2007 (914387)
Do note that if you have Outlook on the system (such as on a workstation), there are updates to Outlook which must follow almost immediately. Outlook isn't the only Microsoft based application to be affected. To find out more information on what Microsoft applications are impacted, see here:
Microsoft Daylight Saving Time Help and Support Center
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