Can't believe I used to sleep until noon on Saturdays
My oldest is up by 6:30 AM every single day no matter what. Used to be able to be a zombie for half the day on weekends but those days are gone. I'm not gonna lie, some mornings I resent it. But we get the whole day extended and I've actually started enjoying early morning cartoons with him while drinking my coffee. I'm more productive before 9 AM now than I ever was staying up late. Trade-off I guess.
Wait until you get a few more years in. You'll actually miss some of those early mornings when they get older.