1816 S. T. Coleridge 20 These are red-letter names even in the almanacks of worldly wisdom.
1843 (title) The red letter almanack.
1878 126 81 My desire..gained me some red-letter marks at the war-office.
1910 (title) Holy Bible. Red letter edition.
1995 (Nexis) 1 Dec. d7 The CMU loss is worth a red-letter mark for the future, especially for Miami fans.