During school... 11:00 PM - 3:00 AM (usually past 12 though...) and I wake up at 6:00 AM. Summer: Late, 12:00 AM - 5:00 AM. Wake up whenever. But that varies too, because I'm often busy. But those times are for your typical "do-nothing-what-so-ever days."
Lately i've been going to bed 3-4 AM and wake up around 12ish. But that will change when I get a job.