Sony has announced they will be performing network maintenance on the PlayStation Network on Monday, June 2. The maintenance is expected to last for approximately six hours, starting at 9:50am and lasting through 3:30pm Pacific Time (12:50pm to 6:30pm ET).
If you've signed into the network any time since May 30, you still should be able to play games online and access apps like Netflix during the maintenance period. However, the PlayStation Store, PlayStation Home and Account Management will not be available during this time. Of course, anyone familiar with Sony is probably already expecting some sort of delay. I feel like every time there's maintenance, it goes past the planned window so we'll be sure to keep you updated on Monday.
On another note, Sony today also revealed the full lineup of free PS Plus games for June. Check out what's free on PS4, PS3, and Vita.