Stay up late or all night?Why?

Hello! I am a habitual late night sleeper.It was developed during my college days about fifty five years back and it still persists with me.Of course I never stay up whole night as that would reduce the metabolism.Just five to six hours of good sleep in the night will be enough for maintaining a sound body and mind.During college days it was necessary to stay up late in night for finishing studies without disturbance.During the service career I was doing lot of office works in the night as I could not concentrate in office hours to finish the works because of disturbances from the public and staff.But now after retirement I have not changed the habit of staying up late in night.thanx.

Sometimes i am studying my subject late at night because it is the time that i really concentrate on what i am reviewing.

Ha...i wish i can do that! work until midnight nothing to bother at like caring those kids. But i no longer able to do that...you give me a pillow i certainly sleep at once. So far nothing can keep me awake until midnight even if i want it very much. I remember during my college years...i need to drink a cup of black and concentrated nescafe and with a big bowl of water to put in both of my feet...thus help me work until midnight or after mid.

Yes, many senior intelligensia have the habit like you.because in night is so quiet you can concentrate on your study.

Yeah, i also have better concentration at midnight than in day time. So quite,there are no annoying sounds like vehicle sounds, TV or people talking too loud which can reduce our concentration. But, some people also have a better concentration when they work in the late of night while listening slow music. For me, it makes me sleepy :D