My baby was just like that around that time. He was a mini ninja at night time kicking and sleep during the day. Now he wakes up in the morning for a while, I guess that after that he takes a long nap, at night time he kicks again and then he goes back to sleep hehe. I'm 38weeks right now
I've always had the same problem and was always told its because your movement rocks him throughout the day. Your still at night so hes not getting the rocking feeling. But both of my boys slept fairly well after they were born...just loved to rock. Maybe try laying down more often and sitting still.