"Being a morning person or a night owl doesn’t just determine when you start or end your workday; your internal clock may help define your psychology as well. A Spanish researcher found that our preference for engaging in activities earlier or later in the day shapes both our perceptions and our interactions."

"...Morning people are more likely to be self-controlled and exhibit “upstanding” conduct; they respect authority, are more formal, and take greater pains to make a good impression. (Earlier research also suggests that they are less likely to hold radical political opinions.) Evening people, by contrast, are “independent” and “nonconforming,” and more reluctant to listen to authority—which suggests that teachers may have several reasons to prefer those students who wake up in time for class."