back in the day I was always an at night studyer by default...between class, practice, work and what not I was never home until well past 9 ...... but they say that the internal clock of adolescents/young adults is wired to want to stay up later, wake up later so it makes sense that many younger people do better at night
now that I'm technically a "real" adult
I've found that I get tired earlier and that makes studying at night impossible (its sucks trying to read something when you're tired and then you realize that you've read the same paragraph at least 3 times and still haven't a clue what it was about
) . I don't really have much to study any more, but I always like to do my most complicated analysis stuff in the early morning (I usually get to work around 5:30am, open the office up, make my coffee and oatmeal, read my emails, and by the time most others show up around 8, I'm half done with my work for the day!).
Besides its amazing how much more you can get done by starting earlier! Especially in places where everything closes at like 10pm anyway