Daylight Savings Time=Y2K?

I posted something about this a while ago when it didn't seem like such a big
deal, but apparently IT pros are worried about the implications of the early
Daylight Savings Time change. According to this article on InformationWeek,
Windows Vista and Office 2007 will automatically update for the change, but
Windows XP and other applications may have trouble.

This quote is a real groaner: "The change was authorized by the U.S. Energy
Policy Act of 2005, but Microsoft says its Y2K-like implications mean computer
users need to parry like its 1999."

what and linux or mac from 2001 knows about it and can change its date at the
correct time?