Are you a frequent traveler to North America? If so, you may wish to check and update your Windows Mobile-powered PDAs with these patches. The reason is that daylight savings time has been changed starting this year:
Congress has changed the dates for Daylight Saving Time (DST) in the United States starting in 2007. Canada has adopted similar DST dates. These changes could cause clocks and Microsoft Outlook calendar appointments on Windows Mobile-powered devices to display incorrect times for March 11 – April 1, 2007 and October 28 – November 4, 2007 and again in subsequent years.
Link: Windows Mobile Updates for Daylight Saving Time