a night person

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.
See also: night, person
Farlex Dictionary of Idioms.

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.
See also: night, person
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

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.
See also: night, person
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • accompany (one) on a/(one's) journey
  • accompany on a journey
  • be in bad with (someone)
  • (one's) heart goes out to (someone)
  • bring (someone or something) into contact with (someone or something)
  • a stranger to (someone or something)
  • be out of (one's) league
  • be out of somebody's league
  • be one in the eye for
  • (one) puts (one's) pants on one leg at a time