The time of day

At some point each day, there is a transition between “early in the day” and “late in the day.” If I manage to get something done while it’s still “early in the day,” then I’m happy; if I don’t finish until it’s “late in the day,” then I feel that I’ve spent the entire day on that task and don’t really have much time left to accomplish anything else. This is true whether at home or at work. Of course I hardly ever get things done “early in the day.” 

Presently, I think that the transition point is 2:30pm.

Along similar lines, I think the boundary between “late at night” and “early in the morning” is 3:30am. Or at least now that I’ve left graduate school, I hope never to have to stay up past or wake up before this point.