The Calendar
What the atlas records for this date, across the traditions it covers.
Observed On This Date
Feast / celebration
17-23 December (a.d
Day 1 of 7
Already Underway
Procession
16-24 December, the nine nights before Christmas
Day 2 of 9
This Week In Space and Astronomy 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.