Didn't I already post up about how babies get their days and nights mixed up?
The solution is simple: wake him every 2 hours or so during the day. If you have to unswaddle him and rub a cool wet washcloth over his face and feet - DO IT! Then nurse him round 11PM or so and he should be down till 4AM.
All four of my kids were like this. Quiet as church mice in the damned hospital but as soon as they came home it was like... HELLO ENTIRE NEIGHBORHOOD - I AM HOME NOW!!!!
The nunu is as big as his head. LOL
What a handsome child!
Please post away gobs and gobs and gobs of pics.. You can NEVER show too many pics of your children.