Looking to play all day on Monday August 25th? Too bad because the PlayStation Network will be down from 9:40 AM to 4:50 PM in what is the most odd down time ever.
Equaling to 7 full hours of down time, the maintenance will be rendering services like the PS Store, PS Home (is this still a thing?), and Account Management useless until the servicing is complete. If users have logged in to the network since August 20th, however, they will be able to still play games online and access Netflix and other apps.
Sony's maintenance time was picked as most users are either in school or at work during these peak hours, but if you will be affected, make sure you log in now to avoid interruption.