Due to school I normally have to get up around 6:30 am, otherwise I'm late for class, which is something I've benn trying to avoid lately (things can get ugly if you're late AND haven't done your homework).
I got so used to this that on the weekend I can't really sleep in anymore, so, at latest I get up a 8:30 am.
I fell a lot better since I don't sleep til noon, like I used to do when I was younger. That way I don't have trouble going to sleep on Sunday nights and am therefore able to get up Monday mornings relaxed