Red letter day
The phrase "Red letter day" refers to a day that is significant, memorable, or extraordinary. It often signifies a day of celebration, achievement, or positive events in one's life. The term originated from the practice of marking special dates in red on calendars, emphasizing their importance.
An idiom is a phrase or expression that usually presents a figurative, non-literal meaning attached to the phrase. Does that sound fun? It can be!
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