Cách sử dụng
"Call it a day" means to stop working or doing something for the day. It's usually used when people have been working or doing something for a long time, and they feel like they need a break or they've accomplished enough for the day. For example, if you're working on a project with your friends, and you've been working on it for hours, one of you might say "let's call it a day" to suggest that you should take a break or stop working altogether. It's a polite and natural way to signal to others that you're ready to finish what you're doing and maybe come back and continue another time.