call it a day

US /kɔl ɪt ə deɪ/
UK /kɔl ɪt ə deɪ/
"call it a day" picture
1.

to decide to stop working on something, either for the rest of the day or permanently

:
It's getting late, let's call it a day and finish this tomorrow.
After working for ten hours, she decided to call it a day.