Sony has announced that its online gaming service forPS4, PS Vita, and PS3 will be down in Europe and North America on January 15. The maintenance period will run from 5pm - 9pm GMT tomorrow, and 9am - 1pm Pacific Time in North America.
During those times multiple services will not be available including PlayStation Store on all devices, PlayStation Network Account Management, PlayStation Network Account Registration, and various Sony Entertainment services.
Online gameplay will still be possible during the maintenance period if you are already signed into your SEN account via the relevant device before the maintenance begins. You'll also be able to use services such as Netflix during that time.
Sony says that this maintenance period will "deploy a series of back-end improvements to the network."
For more information check out Sony PlayStation Community page.
Source: http://www.gamepolitics.com/2015/01/14/psa-playstation-network-down-maintenance-january-15
