What is the meaning of red-letter day?

noun

  • A memorably happy or noteworthy day (from the custom of marking holy days in red on church calendars. ).
WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). red-letter day. Retrieved September 21, 2026, from http://smartdefine.org/red-letter_day/definitions/1249981
ChicagoWordNet. 2010. "red-letter day" http://smartdefine.org/red-letter_day/definitions/1249981 (accessed September 21, 2026).
HarvardWordNet 2010, red-letter day, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/red-letter_day/definitions/1249981>.
MLAWordNet. "red-letter day" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/red-letter_day/definitions/1249981>