Định Nghĩa và Ý Nghĩa của "once upon a time"

What is "once upon a time"?

"Once upon a time" is a traditional phrase used at the beginning of a story, particularly fairy tales or folklore, to signal that the narrative is set in a time or place that is not specified and often magical or imaginary. This phrase sets the stage for storytelling by creating an atmosphere of timelessness and fantasy, inviting the audience into a world where extraordinary events can unfold.