A round of thanks to Bill for offering a CAB file that includes the registry fix to prepare Windows Mobile devices for the upcoming 2007 DST change. The US government (and the Canadian government followed suit) changed the dates for daylight saving time for 2007. This patch will ensure that your mobile device updates correctly when the shift happens.
You can either download the CAB file directly to your cell phone, or download to your PC, copy it via ActiveSync to your phone, and then run it. It will also work for PDAs.
Note that Microsoft is also expected to come out with a patch as well.
Source: PocketPC Thoughts