To call it a day is to quit work and go home. This is an expression used to say that a day’s work has been completed. Read the piece of conversation given below.
Let’s call it a day, shall we?
Storyline: Vishal and Akash have been working for a long time and they feel a little tired. So they decide to stop.
Vishal: At last we’ve sort of finished this report. And I’m feeling tired.
Akash: So am I. I’m so happy that it’s over.
Vishal: Then, let’s call it a day and go home, shall we?
Akash: Sure. See you tomorrow.