This Win 2K server is a production machine which has Internet access. Windows Update on this machine is set to receive and install all security and critical updates automatically. Manually running Windows Update now says "No high-priority updates for your computer are available." Looking at the optional updates available, there is nothing about DST.
This machine does not have Microsoft Update installed.
IMHO there must be lots of machines still running this OS. If Microsoft has failed to deliver a patch for them, this could cause major problems.
PS: The server's Windows time is set to "Eastern Time (US & Canada)". The only other GMT -0500 option is "Indiana".