The Calendar
What the atlas records for this date, across the traditions it covers.
Observed On This Date
Feast / celebration
25 December
Churches keeping the Julian calendar, for whom 25 December falls on 7 January by the Gregorian reckoning.
This Week In Computing History
Dates for the Hebrew and Islamic calendars are the tabular reckoning, which is what a printed calendar prints. Communities that begin a month on a sighted crescent may differ by a day, and differ from one another by place.