I go to sleep every night between 1130-1am. I wake up 5:50MWF, but S,Sun, T,Th I can sleep in.
I would love to train myself to get up at the same time every day because if you're up very early you can get all your work done and then not be continually finishing things down to the wire. Next semester I asked to teach 730 am, which means up at 5:00am. I want to give it a trial of getting up at 5, powering through, and being DONE with grad school reading, writing, prepping for class and grading by 4pm.
Most people are not extreme night owls or early birds. When I was on my gap year I found that I, like many others, could easily adapt to waking up at 330 am to travel before the African sun got too hot, even though I'd default to a night owl. This was easy when we all shared a large bedroom and everyone was beginning to wake up together; I think it's more cultural that people think they're night owls. It's easier to stay in bed when your blood pressure is low from lying down all night and it's a dark room lacking the light chemicals that are supposed to kickstart your alertness and there's nothing to stimulate it. We're more social beings than that. It's hard to get into a routine on your own, which is why I wanted to commit to 730 am teaching. If we're just getting up for our own benefit it's like swimming against the current. But on my gap year program I learned it's just as easy to drift into early rising if everyone around you is doing it and there's human activity stirring when you're waking up.