Prepare Yourself for Daylight Savings Changes in 2007
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). People in the US and internationally will be impacted by this change. People in other countaries will mostly be impacted if the conduct business with companies in the US.
If you go to http://support.microsoft.com/gp/dst_topissues, there is a fantastic article that talks about the issues surrounding this years daylight savings change with guides on actions to take to help ensure a smooth transition.
At http://support.microsoft.com/gp/cp_dst there is another good resource that has more details and links to top issues across all Microsoft product lines.
There is a lot of preparation being done within Product Suppport to be able to respond to the change. If you do end up having to call Microsoft Product Support, I'm sure you will talk to people that are aware of the changes and be ready to help you through your issue 100%.