Sony performing scheduled PSN maintenance on Thursday
On Thursday, May 24, Sony will be performing maintenance on the PlayStation network as part of an effort to "continue to deliver you a world-class online entertainment experience."
Maintenance will begin at approximately 8:00 am PDT and conclude around 11:00 pm PDT.
During this time you may receive a message that states "PlayStation Network is undergoing maintenance" when attempting ot access the PlayStation Store or PlayStation home from your PS3 or PS Vita devices. Online play and entertainment apps will not be affected during this maintenance as long as you have signed into the network within 5 days prior to the start of the maintenance period.