Definition & Meaning of "call it a day"

What is the origin of the idiom "call it a day" and when to use it?

The idiom "call it a day" has its origins in the world of work and labor. It can be traced back to the idea of ending a workday or a shift when it is deemed appropriate or sufficient. The expression suggests that a decision has been made to cease work for the day, often based on factors like completing the necessary tasks, reaching a reasonable point of progress, or acknowledging that further efforts may not yield significant results. Over time, the expression has been adopted into broader contexts beyond work and is used when deciding to stop or conclude any activity.