Science Atlas

How We Know What We Know
The Calendar

Saturday 28 December 2030

What the atlas records for this date, across the traditions it covers.

Observed On This Date

Commemoration of a person or event
28 December; 29 December in the Byzantine calendar
29 December in the Byzantine calendar.

Already Underway

Feast / celebration
25 Kislev to 2 or 3 Tevet
Day 8 of 8
Runs into Tevet, since Kislev has twenty-nine or thirty days.
Fast / abstinence
The whole of Ramadan, the ninth month
Day 4 of 29
Tabular reckoning, and stored as twenty-nine days so the month can never be reported as running into Eid al-Fitr. The month is twenty-nine or thirty days and begins on a sighted crescent in most communities.

The Week Ahead

Wednesday 1 JanuaryShogatsu (New Year)

This Week In Science History

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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.