B.C.
Our son slept inside me all day as long as I was moving.
Then at night I would sleep soundly while he was kicking up a storm.
He nudged so much he actually kicked Dad out of bed.
The only reason I didn't worry about lack of movement during the day (I seldom felt him) was I knew he was using me as a bounce house all night (Dad would tell me).
He'd get close to my belly button and say "Hey! You! This is your father speaking! Quit kicking me out of bed!" - it was SO cute!
After he was born, he was definitely a night owl.
It took months to get his days and nights switched around.