Through the PlayStation Network Support forum, Sony scheduled a minimal maintenance for the PlayStation Network.
Starting tomorrow morning at 9:00am Pacific Standard Time, maintenance will extend until 4 PST. Tempest_Fire, Digital Platforms Community Manager, specified that the first hour of maintenance may have a peculiarity, where accessing the PSN will yield a maintenance notification. The PlayStation Store and Account Management will be out of reach during the downtime, but everything else should be in working order, including playing online and using applications like Netflix, Crunchyroll, and Youtube.
If more maintenance is required, we’ll keep you informed. Until then, game on.
Via PS Forum