When is your baby most active?

A couple weeks ago my baby girl moved all day every day. Now she's starting having little patterns of sleep and movement and I've noticed she's most active at night when I'm sleeping (or trying to anyway!) It starts a little while before I go to bed and seems to last most of then night. She's also very active in the morning when I wake up and then it's on and off throughout the day depending on my activity level etc.