Blame Congress.
Go to MS and learn and download everything you can. The patch for DST is there somewhere. Sign up for the "Owner's Circle" while you're there.
https://www.microsoft.com/windowsmobile/default.mspx
I don't have it anymore because it's included in my custom ROM. There is also a patch for Outlook. You need to apply both patches in a certain order.
edit: I found the patch, but don't know how to upload to the FTP.