Why is my PlayStation store not working it says it is undergoing maintenance?

[Mason]

I just want to download ntz and play it but my ps3 is being a pessimistic bitch again

[Haяd woяking guy]

Because it has been under maintenance for over a day now.

[Valarie]

My PS3 is doing that as well. I'm guessing its because they're undergoing maintenance.

[Alex Marquez]

Meh mine is doing the same thing too. It's under maintenance.

[Jaren]

Should be back up by 5:00 A.M (eastern time) 1/19/13

[listensoftly]

The PlayStation Network is currently: Offline

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We are currently performing maintenance to upgrade the software for the PlayStation Network from January 17-19th. This maintenance is scheduled to end around 2:00am PDT (5:00am Eastern) Saturday January 19th.

During this maintenance period, you may receive a message that states “Sony Entertainment Network is undergoing maintenance” when attempting to access the PlayStation Network, PlayStation Store, or PlayStation Home.

If you have signed in to PSN within 5 days prior to the start of maintenance (meaning: any time since January 12), you may be able to play games online and enjoy apps such as Netflix, HULU Plus and Music Unlimited during this maintenance period.

Note: During our current maintenance some authenticated users may have lost access. We apologize for this inconvenience and are working hard to restore access as soon as possible.

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We will update you with any changes that may occur in regards to this scheduled maintenance. If you would like to receive a notice when PSN is fully restored, be sure to follow the official PlayStation Twitter account and our support Twitter account, @AskPlayStation.