Any time after 2. Sometimes I wont sleep till 3, 4, or my latest is 5:30. I can't fall asleep early even if i try. Even when I'm sick I can't fall asleep early. After 11pm I'm wide awake. Once or twice a long time ago I tried taking a nap in the afternoon but when I got up I felt sick for a few hours, dizzy or light headed (I don't fully understand it) and I'm not going to try it again cuz if I do I'll just throw off my sleeping pattern which is pretty much none existent! My theory for me not going to sleep is I don't want tomorrow to come. I want to stay in the now.