call it a night

Related to call it a night: call it a day

call it a night

To stop working, either at one's job or on a particular task, for the rest of the night. I'm too tired to keep looking at these numbers, so let's call it a night. This package is the last one. Once we get this shipped, we can call it a night.
See also: call, night
Farlex Dictionary of Idioms.

call it a night

to end what one is doing at night and go [home] to bed. At midnight, I called it a night and went to bed. Guest after guest called it a night, and at last we were alone.
See also: call, night
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

call it a night

Informal
To stop what one has been doing, for the remainder of the night.
See also: call, night
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • a full-time job
  • be remembered as (something)
  • be remembered as/for something
  • at (one's) doorstep
  • at doorstep
  • be remembered for (something)
  • (there's) no peace/rest for the wicked
  • at one's fingertips
  • at your fingertips
  • at (one's) fingertips