Sony has announced that this Thursday, The PlayStation Network will be undergoing yet another maintenance.
This maintenance is schedule to run from 8:00am PDT till 11:00pm PDT (14 hours).
Details from the Official Playsation Blog:
During this maintenance period, you may receive a message that states “PlayStation Network is undergoing maintenance” when attempting to access the PlayStation Store or PlayStation Home. Online play will not be affected and you will be able to enjoy apps such as Netflix and Amazon Instant Video during this maintenance as well, provided that you have signed into the network within 5 days prior to the start of the maintenance period.
Devices to be affected by this maintenance include both the PlayStation 3 and the PlayStation Vita.