black-letter day

A form of black letter day — A day marked in ancient calendars in black letter, as distinguished from the more important red letter days; an inauspicious day.

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Meanings

nounblack-letter day (plural black-letter days)

plural black-letter days

  1. alternativeAlternative form of black letter day.
Cite this entry
APA

black-letter day. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/black-letter%20day

MLA

“black-letter day.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/black-letter%20day. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “black-letter day,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/black-letter%20day.

Source: black-letter day on Wiktionary, CC BY-SA 4.0.