I know the title is confusing so let me clue you in.
I'm a student and I have the tendency of being lazy, in that I don't study regulately but rather study one night before ( it worked so far, I know it's bad and so on ). Now the thing is that I usually pull all nighters during this and fuck my sleep cycle up. For instance, now I go to sleep at 2-4 pm and wake up at 10 pm without an alarm ( so really it's the body getting as much sleep as it needs, the usual 6-8 hours ). What I noticed, though, is that I am much worse at staying awake when I stay awake the whole night ( regardless of how much I slept. If I wake up at 10 pm I'll be sleepy/tired by the time morning hits ) even if I were to wake up at 8 am I wouldn't be tired and falling asleep at 8 pm.
So from where I'm standing it's as if I spend more energy staying awake during the night than during the day. Is this just a placebo effect or are we literally built to stay awake better when the sun is up?