Monday’s PSN maintenance has been rescheduled for tomorrow so that you should expect the service to be offline. According to Sony the service will go offline from 4 pm until Friday, August at 5am BST, in Europe and in North America it will go offline from 9.40am until 4.50pm ETD.
During this period you won’t be able to log in to Account Management or PS Store. Also, PS Home will be unavailable. Don’t forget that you can keep your online session if you log in to your account before maintenance, in the last 5 days on your PlayStation device. This should keep you connected.