a night person

Someone who is more active and alert in the later hours of the evening than early in the day; someone who prefers to work or stay up late, typically avoiding being awake earl in the morning. I've always been a night person. I just find I can be so much more productive when there's no one else awake. I was a night person for most of my life, until the day I had kids, that is.

night person

Fig. someone who is more alert and active at night than in the daytime. (Compare this with a day person.) I'm really not efficient until after supper. I am the quintessential night person.

night person

n. a person who prefers to be active in the nighttime. (The plural is with people. Compare this with day person.) I can’t function in the morning. I’m strictly a night person.