Microsoft will end support for Service Pack 2 on July 13.
Now if you can somehow upgrade to Service Pack 3, you can forget about the problem until Microsoft’s Extended Support for XP ends April 8, 2014, assuming the hard drive in that PC you bought in 2001 lasts that long. Meanwhile, I wouldn't slack off on the backups.
And, no, July 13 isn’t on a Friday.
Support for Windows XP Service Pack 2 ends on July 13, 2010
Microsoft's page on this is here.