PSN will be partially inaccessible for around 6 hours.
Sony have announced some of their PSN services will be unavailable on Monday June 2nd due to scheduled network maintenance. The news arrived on the PlayStation Forums advising some services will go offline,
“If you’ve signed in to the network any time since May 30th you will be able to play games online and access partner apps such as Netflix during this maintenance period." Stated Sony, "The PlayStation Store, PlayStation Home and Account Management will not be available during this time, and users may receive a maintenance notification when attempting to access these services.”
The maintenance is set to run from 9:50 AM to 3:30 PM Pacific Time (12:50 PM to 6:30 PM Eastern Time). In Europe PSN maintenance will run from 5:50 p.m. until 11:30 p.m with Sony warning of possible addition downtime for testing purposes.