Patch WSS 2.0 (and SPS 2003) for Daylight Savings Time changes
This was just brought to my attention this week and if that's the case, I'll bet this arbitrary change in DST rules causes more ripples than Y2K ever did.
If you're running WSS 2.0 or SharePoint Portal Server 2003 (which in dependent upon WSS 2.0), then you should install the patch. If you're running the new stuff - WSS 3.0 or MOSS 2007 - then you're free to return to your daily reading.
Desktops receiving automatic updates may already have the Windows and Outlook patches. Administrators of Exchange and Outlook Web Access should read the guidance for MSFT Products affected by the change.
Windows SharePoint Services 3.0: No update needed.
Windows SharePoint Services 2.0: A single global time zone update including changes for the United States and Canada DST change is available now via the Microsoft Download Center and on Jan 29 through Microsoft Update. (Windows SharePoint Services update does not include new Mexico time zones.) For more information, see KB articles 924881 and 888253.
Microsoft products affected by the DST legislation
Microsoft Windows Microsoft Windows SharePoint Services Microsoft Exchange Server Microsoft Office Outlook Microsoft Office Live Meeting Microsoft Dynamics CRM Microsoft SQL Server Notification Services Microsoft Entourage Microsoft Windows Microsoft Windows SharePoint Services Microsoft Exchange Server Microsoft Office Outlook Microsoft Office Live Meeting Microsoft Dynamics CRM Microsoft SQL Server Notification Services Microsoft Entourage
Source : http://support.microsoft.com/gp/dst_topissues