The idiom "call it a night" means to stop doing something, usually an activity or work, and go to bed or end the day. It is often used when someone is tired or when it is getting late.
For example, if you are at a party and it's getting late, you might say "I think it's time to call it a night and head home." Or if you are working on a project late at night, you might say "I'm getting tired, let's call it a night and continue tomorrow."
This idiom is commonly used in informal situations, and it is a polite way to suggest ending an activity or work without being rude or abrupt. It is also a way to acknowledge that it's time to rest and recharge for the next day.
• We've been working on this project for hours, I think it's time to call it a night and continue tomorrow.
• I'm feeling tired now, let's call it a night and go to bed.
• After a long day of meetings, I'm ready to call it a night and get some rest.
• We had a great time at the party, but it's getting late, so let's call it a night.
• I was hoping to finish this book tonight, but my eyes are getting heavy, I think I'll call it a night.
• As the play came to an end, the audience rose to their feet, signaling it was time to call it a night.