# Christmas Day

> English word · Noun

## Definitions
1. The day on which Christmas is celebrated. It is December 25 in the West, and January 7 in some Eastern Orthodox churches.

## Etymology
From Middle English Cristemasse day, from Old English Cristes mæssedæġ (“Christmas Day”, literally “day of Christ's mass”). Now equivalent to Christmas + day.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/christmas-day