the 10th of may i presume
There's no official date
If you lost your date of birth, you have larger issues than playstation. You may be able to contact the playstation network for assistance.
November 11 2006 was the launch date
They are not releasing details except the date and what they learned was viewed
PlayStation should be back up in a few weeks
PlayStation has announed that they will have it up before may/31/11
It won't. Sony lost their entire database from hackers. So you can't log in, sign up, or download games.
Network has been back up and running for over a yearThe PlayStation network was shut down on April 20 2011 and it is not known when it will be back on The related question has details and will also be updatedsee related question
Within a week was the latest answer from SonySee related Question
The last item in the network to come back up was the PlayStation store on June 2 2011 after the April 20 2011 shutdown
Shutdowns since them have only been for hours and normally for scheduled maintenance The network came back online after the April 20 2011 shutdown and the PlayStation store's return on June 2 2011was the last part of the network to come back online
Ask your parents what your birthday is.