Attention PlayStation gamers: Sony has announced that PSN will undergo maintenance this week for an estimated 3.5 hours.
The maintenance addresses back-end improvements, and will start Thursday, February 12 from 9 AM to 12:30 PM Pacific time.
If you're already signed in on your PS4 (that's designated as your primary system), PS3, or Vita before it begins, you will still be able to play games and access apps like Netflix while the work is being done. However, account management, the PSN store, and PlayStation Home will not be available during the time PSN is down.
[Source: PlayStation Support Forums]