Share your experience!
You have 2 options
1) wait
or
2) manually update your phone
http://www.sonymobile.com/global-en/software/phones/xperia-p/
You may already have the latest software, depending on the date of purchase. Software updates are released at different times depending on operator and/or country. Therefore, we cannot give you an exact date for when a specific update will be available for your device.
Android version: Google Android 4.1 (Jelly Bean)
Latest available software: 6.2.A.1.100
Release started: 2013-06-12
If you want to manually update your phone
How to manually update, downgrade, root 2012 Xperias
http://talk.sonymobile.com/thread/41609
What do you see when you go to
settings > about phone
Here 
You are still on ICS.Where are you from?Is your phone branded?
It make sense, you have to wait for your carrier/network to approve and release the latest update, not Sony
or
you can manually update your phone
How to manually update, downgrade, root 2012 Xperias
http://talk.sonymobile.com/thread/41609