Title says all. How long have you stayed up before going to bed? The longest I've stayed up is 10PM.
4 days and nights. During an FTX way back in the days of bootcamp, it was required that we stay awake for 3 days and nights. I managed to go 4, a few others actually went 5. I passed out from exhaustion on the march back, though. Funny, once you hit over 24hrs, it's a little easier to stay awake. Something with the brain and certain chemicals kicking in or something like that.