When do you sleep at night?

I usualy go sleeping at 12.00 P.M - 01.00 A.M.

I'm used to not sleeping much, since I'm on my computer often, and I have to be up for school at eight thirty in the morning. Once I finish homework and play on my computer for a bit (mainly posting on here the last few days, but also checking facebook and watching sailor moon), I normally lay down around one or two in the morning.

Well, i worked at night and i slept during day.. I started to leep at 2:00pm to 9:00pm..