From Longman Dictionary of Contemporary Englishcall it a daycall it a dayinformalSTOP DOING something to decide to stop working, especially because you have done enough or you are tired Come on, let’s call it a day and go home. → call
Examples from the Corpus
call it a day• Come on, guys, let's call it a day.• So he agreed to call it a day.• Look, we're all tired - let's call it a day.• We realized we weren't going to get the job finished, so we decided to call it a day.• But yesterday he announced he was calling it a day.• By 1 p.m. we had another forty-five sheep on deck and decided to call it a day.• It's time I called it a day.• It would do this twice more and then call it a day.• Mishak and Malaika call it a day.• He decided to call it a day after doctors told him he had lost the other testicle.• Time to call it a day, ladies. 