Super hyper & happy when I go to bed very late?

Okay so usually I have very bad depression and really lack the energy and feel so depressed and negative during the day, but whenever I go to sleep really late (3am seems to be the magic time), I still end up waking up around 9am or 10am and I'll feel amazing, very happy and super hyper and it lasts all throughout the day. And my thinking is also really positive and clearer. (I'm even having trouble writing this right now because I can't stop dancing from feeling so happy and hyper, lol! XD) It's so strange because it seems like it should be the other way around. I know it's very bad to go to sleep that late, but I'm almost kinda afraid to stop now because I feel so much better this way. Does anyone know why I feel this way when I go to sleep so late? Am I the only one?? (I think I am...)