Seems many gamers today are going to have to go without their fix.  The PS3 is for some reason thinking today is Feb 29, 2010, which doesn't exist, and is causing all manner of headaches.
Sony says it's limited to the older models (ps3 phat), but doesn't have a solution yet.  The best case is that PSN is inaccessible, meaning no online play.  However there are many reports of people unable to play any games.

Oops, maybe a link to the story would be helpful.  http://kotaku.com/5482328/ps3s-suffering-from-global-lockdown?skyline=true&s=i