society > faith > worship > liturgical year > feast, festival > [noun] > double, important > letter in calendar indicating (2)
red lettera1387
A character or word written or printed in red, typically in order to draw attention to particularly important or significant information. Chiefly in p…
rubric1587
A calendar of saints; an entry in red letters of a name in such a calendar. Also in extended use. Obsolete (rare after 17th cent.).