According to the official Sony PlayStation blog, the problem was indeed an error with the internal clock function of older ‘fat’ PS3s.

“We are aware that the internal clock functionality in the PS3 units other than the slim model, recognized the year 2010 as a leap year. Having the internal clock date change from February 29 to March 1 (both GMT), we have verified that the symptoms are now resolved and that users are able to use their PS3 normally,” said Patrick Seybold, Senior Director of Corporate Communications and Social Media.

“If the time displayed on the XMB is still incorrect, users are able to adjust time settings manually or via the Internet. If we have new information, we will update you through the PlayStation.Blog or PlayStation.com.

“We apologise for any inconvenience this may have caused,” Mr Seybold said.