PlayStation Network is scheduled to go down on Monday, September 10th. The maintenance will last around 14 hours from 8am PT to 10pm PT or 11am ET to 1am ET. The time is subject to change and could last longer as we have seen before.
The annoucment also says if you’ve signed onto PSN over the past few days, you’ll still be able to play online and access apps during this period, but you will receive a maintenance notification when attempting to access the PlayStation Store, PlayStation Home, and Account Management as these services will be unavailable.
Download what content you need now and be sure to sign in now if you wish to access the Network during this maintenance window.