response: Yes. And interestingly, some night owls may have delayed sleep phase disorder.  These are the people who have great trouble acheiving normal sleep and wake times.
original_response: Many night owls have difficulty adopting normal sleeping and waking habits and develop a sleep-phase disorder.
history: I am a night owl, I can't seem to make myself go to sleep early, I always end up staying up really long. Oh I see!   Did you know the night owl's opposite is a lark, or early bird?  They go to sleep at a time considered early, and wake early. I understand, it' hard to wake up early during the day. Ah yes.  Oh by the way, in Scandinavia they call early birds "A-people," while they call night owls "B-people!" I never heard of it, I kind of like early bird and night owl phrases more to be honest. I've always wanted to visit Scandinavia. Oh cool!  Did you know owls are nocturnal?  That's where the term night owl is derived from. Yes I always thought so, just like early bird refers to bird that wake up right when the sun rises on the horizon.
knowledge: Some night owls who have great difficulty adopting normal sleeping and waking times may have delayed sleep-phase disorder.