I don't know if I can be considered a night owl as I am up until maybe 10 am and sleep until like 3pm. I have plenty of hours in both the day and the night. I am what happens when the early bird and the night owl get it on.
I find myself sleepy around 4am. I usually sleep early but.. Since I got New Leaf. I no longer sleep early xD
I'm trying to get back to a normal schedule! I still wake up at 7am.. Not very good sleeping habit.
Mine is totally randomly, but usually any time between 1am - 7am. I could go to sleep at 1 am one day and then go back to sleep at 7 am the following day XD.