Why did they not check the calendar in their regions first.... if is critical say that at least but maintenance sounds so routine.
PlayStation Network is offline for scheduled maintenance from 17:40 on Monday 25 August 2014 until 00:50 Tuesday 26 August 2014 BST.
During the maintenance, you will be unable to access the following services:
PlayStation Store on all devices.
PlayStation Network Account Management.
PlayStation Network Account Registration.
Online gameplay - however, you may still play online if you are already signed into your SEN account via the relevant device before the maintenance begins.
In addition, you will not be able to sign in to PlayStation Network from eu.playstation.com.
During this maintenance, you can continue to collect in-game trophies and these will be updated on your profile once PlayStation Network is back up and running.