Well, not quite. But I did just stumble completely by chance on a website that tells me that today is the last day of Microsoft support for Windows 98 and (everybody's favourite) Windows Me. Windows XP SP1 will also no longer be supported after today so install SP2 if you haven't already.
If your computer still runs on either Windows 98 or Windows Me, now would be a very good time to start thinking about upgrading to something more secure and, er, 21st century. Jump straight to Windows XP with Service Pack 2 if you're in a hurry, or start saving for a shiny new Windows Vista PC early in 2007.