The PlayStation Network will be having a scheduled maintenance at the start of next week.
The PSN will be down from Monday afternoon, starting at 2pm, running through to early Tuesday morning, 5am. So that’s 15 hours of downtime in total.
During that time, Sony notes that you won’t be able to access the PlayStation Store on PS3 and PSP, as well as PSN account registration, and account management.
You won’t be able to sign into PSN from eu.playstation.com, either.
If you’re logged on to your account before 2pm on Monday, though, you should still stay connected throughout the maintenance, and be able to play online (obviously there are no guarantees, as ever). Just don’t forget to go on before the 2pm deadline.
Also Sony notes that in-game trophies which are collected during the downtime will be updated on your profile once PSN is back up and fully functional on Tuesday morning.