marked by red letters, as festival days in the church calendar.
memorable; especially important or happy: a red-letter day in his life.

Origin of red-letter

late Middle English word dating back to 1400–50 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for red-letter

auspicious, banner, fortunate, happy, memorable, notable, noteworthy

Examples from the Web for red-letter

Contemporary Examples of red-letter

Historical Examples of red-letter

  • This may be termed the red-letter year of the Canadian post-office.

  • That will make it another kind of red-letter day—S for S'prise.

    The Goody-Naughty Book

    Sarah Cory Rippey

  • Phœbe's graduation from the Greenwald High School was her red-letter day.


    Anna Balmer Myers

  • However that may be, certain it is that this is a red-letter night at the Mermaid.

  • The girl came to count that a red-letter day on which she did not see her mistress.

    A Forgotten Hero

    Emily Sarah Holt