Im pretty an evening person or simply owl, is a person who tends to stay up until late at night.Guess you can call me a Night Owl ...Lol!
I am a night owl as well.  What time do you usually stay up til?
opposite of a night owl is an early bird, a lark as opposed to owl, someone who tends to begin sleeping 
My wife is more of an early bird.  What causes people to be one or another?
Early bird dinner
Early bird dinner is a dinner served earlier than traditional dinner hours, particularly at a restaurant. Many establishments offer a seating prior to their main dinner seating with a reduced price menu, often more limited in selection than the standard dinner menu. Some restaurants offer specific meals or meal options which are sometimes referred to as early bird specials. The term "early bird special" was first used for a clothing sale in 1904, and then in restaurants in the 1920s.
The hours which are deemed as
Night owl (person)
A night owl, evening person or simply owl, is a person who tends to stay up until late at night, or the early hours of the morning. Night owls who are involuntarily unable to fall asleep for several hours after a normal time may have delayed sleep phase syndrome. 
The opposite of a night owl is an early bird – a lark as opposed to an owl – which is someone who tends to begin sleeping at a time that is considered early and also wakes early.