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A red letter day (sometimes hyphenated as red-letter day) is any day of special significance or opportunity. Its roots are in classical antiquity; for instance, important days are indicated in red in a calendar dating from the Roman Republic (509–27 BC).
The phrase “red letter day” is a common idiom used to describe an important or significant event. It has been in use for centuries and has its roots in medieval times when religious feast days were marked on calendars with red ink.
A red-letter day is a day that is special, remarkable in a positive way, or that affords a great opportunity or is particularly memorable. Its roots go back to the literal use of marking important red days on calendars and back to antiquity!
a red-ˈletter day a very special day which is remembered because something important or good happened: Today was a red-letter day. We heard we had won a free trip to Japan. Religious holidays and other important dates used to be printed in red on calendars.
A significant, important or happy day. Examples. Mom will be a hundred years old on the 23rd. That’s a real red-letter day for the family. Where did it originate? Britain – 15th century. Where is it used? Worldwide. Hear the idiom spoken. More idioms about. Colour. Happiness. Date. How the idiom originated.
red-letter day. noun. /ˌred ˈletə deɪ/. /ˌred ˈletər deɪ/. an important day, or a day that you will remember, because of something good that happened then. birthdays, wedding anniversaries and other red-letter days. It was a red-letter day for United, who won a place in Saturday’s final.
You can use "Red Letter Day" to describe a day that holds great importance or significance. It is often used to express excitement or anticipation for an upcoming event or to reflect on a past event that was particularly memorable.
