Apparently Sony were not listening, the PSN is going to be offline on Easter Monday, albeit for six hours rather than twelve.

We wanted to take a moment to inform you of a network maintenance, currently scheduled for Monday, April 21st from 9:50 AM to 3:50 PM Pacific Time (12:50 PM to 6:50 PM Eastern Time). We expect this maintenance to last approximately 6 hours.

If you’ve signed in to the network any time since April 16th you will be able to play games online and access partner apps such as Netflix during this maintenance period. The PlayStation Store, PlayStation Home and Account Management will not be available during this time, and users may receive a maintenance notification when attempting to access these services.

We thank you for your patience and support and apologize for any inconvenience this may cause.