by day

(redirected from by night)

by day

During the day. Often used to refer to one's employment or other typical daytime activities, in contrast with what they are apt to do "by night." By day, he was an average office clerk, but by night he was crime-fighting vigilante. She's a teacher by day and an actress at the local theater by night.

by day

 and by night
during the day; during the night. (Often used in simultaneous clauses for contrast.) By day, Mary worked in an office; by night, she took classes. Dave slept by day and worked by night.
References in classic literature ?
The luxurious bed, the well-ventilated room, the delicious tranquillity of Venice by night, all were in favour of his sleeping well.
With that refuge as a base, I could face this strange world with some of that confidence I had lost in realizing to what creatures night by night I lay exposed.
By night the same muteness of humanity before the shrieks of the ocean prevailed; still in silence the men swung in the bowlines; still wordless ahab stood up to the blast.
There was no reason, however, why I should refrain from seeing the person who had inconsiderately sent her to so great a distance by night and alone, and as it was not improbable that if she found herself near home she might take farewell of me and deprive me of the opportunity, I avoided the most frequented ways and took the most intricate, and thus it was not until we arrived in the street itself that she knew where we were.
But waking or sleeping, by night or day, in sickness or health, she is the one object of my care, and if you knew of how much care, you would look on me with different eyes, you would indeed.
What could take him from home by night, and every night