I am a night owl, I go to bed late.
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.
accustomed to go to bed early in the afternoon and awakening late in the morning. His consorts awaited him in his bedroom where he lay with them every night, largely neglecting state affairs while the kingdom sank into crisis. Once Queen Jiang left his room in the morning, before he had woken up. She removed the pins of her hair and unmade her hair bun. Then she went to the hall of penitence and asked a maiden to summon the king with the following message: "I am incompetent, and my dissolute