red letter day

Etymology
An allusion to the practice, dating to classical antiquity, of marking important days in red on calendars.

Noun

 * 1) A day marked in red on calendars; a church feast day.
 * 2)  A particularly significant day; a day of personal or sectarian celebration.
 * 3) * 2010, Eric Braun, Doris Day, Hachette, Revised and updated edition, unnumbered page,
 * That was, indeed, a red-letter day in my filmgoing life, and a red-letter day in my literary life was when I was asked to write a new biography of Doris Day.
 * 1) * 2010, Eric Braun, Doris Day, Hachette, Revised and updated edition, unnumbered page,
 * That was, indeed, a red-letter day in my filmgoing life, and a red-letter day in my literary life was when I was asked to write a new biography of Doris Day.
 * 1) * 2010, Eric Braun, Doris Day, Hachette, Revised and updated edition, unnumbered page,
 * That was, indeed, a red-letter day in my filmgoing life, and a red-letter day in my literary life was when I was asked to write a new biography of Doris Day.
 * 1) * 2010, Eric Braun, Doris Day, Hachette, Revised and updated edition, unnumbered page,
 * That was, indeed, a red-letter day in my filmgoing life, and a red-letter day in my literary life was when I was asked to write a new biography of Doris Day.

Usage notes

 * Usually used to refer to a notably positive, favorable occasion, but sometimes used with a negative sense.

Translations

 * Catalan:
 * Chinese:
 * Mandarin:
 * Danish:
 * Dutch:
 * Finnish:
 * Hungarian: piros betűs nap, piros betűs ünnep
 * Norwegian:
 * Bokmål: merkedag
 * Nynorsk: merkedag
 * Russian: па́мятный день,
 * Swedish: