My Windows 2000 Server had to be manually set. I am up-to-date with installer updates but it seems Microsoft didn't put out a patch for 2000.
So, rather than mess with it now, then again in 3 weeks, and then again in the fall, I performed "Method 2" in the knowledge article below, from Microsoft, which has you manually updating the TZ DST rules via a nice UI you download, and then reapplying a different TZ for a moment then switching back to make the changes stick (or a reboot would work I suppose).
For anyone using Win2K, check it out (Method 2):