from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. a day to commemorate the killing of the Holy Innocents. Variously held on 28th December in the Western Church and 29th December in the Eastern Church. In Spanish speaking countries this is often a prank filled day like April Fools' Day.
from The Century Dictionary and Cyclopedia
- n. The popular name of Holy Innocents' day, a feast-day observed in the Roman Catholic and Anglican churches on the 28th of December in commemoration of the slaughter of the children in and near Bethlehem by order of Herod soon after the birth of Christ, as narrated in Mat. ii. 16-18. Also Childermas day.
childer (“children”) + -mas (Wiktionary)