Call it a day
Meaning/Usage: Used to express that the work day is over.
Explanation: Call it, is often times used to make a decision. When you add "day" to this, then a person is making a decision to say that the day is over. This is mostly used to end a working day.
1-Let's call it a day. I'm too tired to continue working.
2-We can't continue working without Mike, so let's call it a day.
3- It's already nine o'clock. Let's call it a day.
Conversation
A- How much more work do we have for tonight?
B- I think we finished everything for the day.
A-Good. Let's call it a day then.
Other Common Sentences
1-Let's turn in for the night.
2-I think we should pick it up from the morning.
pick it up = continue
