That's what's posted at the AUS/NZ Playstation forum.

PSN: Scheduled Maintenance, 28th and 29th of July

Hey guys just a quick notice to let you know that on Tuesday 28th from 2pm to 5:30pm and on Wednesday 29th from 2pm to 6pm the PSN will be offline for scheduled maintenance. As soon as this has finished the PSN will be back online for further use.

During this time some of you might be unable to sign-in. If you are already signed in during the maintenance, some users might be signed out automatically. Any user who is signed out or unable to sign-in should be able to sign back in after approximately one minute.

We apologise for any inconvenience this may cause.


Regards

FurySevenSix