at waht time will go to sleep at night?

i normally sleep at 11 or 12 sometimes earlier at 9 pm... if im not sleepy i go to sleep at 3 or 4am... i like to sleep!

I work the whole day and when I get home I take a bath, have my dinner, talk with my boyfriend and then I might play on my laptop and sometimes I am so tired that I go to sleep immediately so I do not sleep so late but at nine thirty or ten I am already asleep which is very different to my boyfriend who can sleep after 12 also. I often wake up at night then I might watch a movie or read my novel.

I don't have an specific time but half the weekday i'll go to sleep at around 3am and on weekends probably around 5 or six am.