childermas day Meaning, Definition & Usage

Chil"dermas day`
Etymology
AS. cildamæsse-dæg; cild child +dæg day.
Definitions
  1. (Eccl.) A day (December 28) observed by mass or festival in commemoration of the children slain by Herod at Bethlehem; -- called also Holy Innocent's Day.

Webster 1913