I am a night owl and tend to stay up very late every night
Me too! I love being up late at night.
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.
day when I was giving a lecture at St Martin's School of Art, a BBC producer, Mike Appleton, was waiting at the back to pick up his girlfriend and he caught the last 10 minutes. He came over and said it was very interesting. 'I am a producer of a programme called "Late Night Line-Up". Would you like to come along and do something similar on the programme?' They liked it and asked me to come back next week and do another one. I initially