Định Nghĩa và Ý Nghĩa của "the party [is] over"

What is the origin of the idiom "the party is over" and when to use it?

The exact origin of the phrase "the party is over" is not definitively documented, but it is used to signify the end of a period of celebration or enjoyment. It is often employed to communicate a shift from a more carefree or favorable situation to a more serious or challenging one.