I agree. I also would add to the theory that for a night owl, getting up at 4:30-5:00 am, is still getting up at night, so it is ok with whatever hormone regula

I agree. I also would add to the theory that for a night owl, getting up at 4:30-5:00 am, is still getting up at night, so it is ok with whatever hormone regulatory system exists. But you are correct, you need to go to sleep around 8pm which is impossible, if you want to keep it up. And if your are up after 9, then you're screwed, and can't sleep until 2 AM. I also agree with poster up above about kids changing your dream cycle to make it possible to wake early, when necessary.