CALL IT A DAY

To stop an activity for the day.

We've done enough work today. Let's call it a day.

CALL IT A NIGHT

To go to bed to sleep.

I'm tired. I'm going to have to call it a night.

CALL IT EVEN

To declare debts paid.

You save my life five years ago, and I saved your life just now. Let's call it even.

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