The Calendar
What the atlas records for this date, across the traditions it covers.
Already Underway
Procession
16-24 December, the nine nights before Christmas
Day 9 of 9
Feast / celebration
25 Kislev to 2 or 3 Tevet
Day 4 of 8
Runs into Tevet, since Kislev has twenty-nine or thirty days.
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.