Science Atlas

How We Know What We Know
The Calendar

Wednesday 12 April 2028

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

Already Underway

Penitential season
From Palm Sunday to Holy Saturday, the week before Easter
Day 4 of 7
Fast / abstinence
The forty days from Ash Wednesday to Holy Thursday, Sundays not counted
Day 43 of 46
Forty days, counted excluding Sundays, which is why the span is forty-six.
Feast / celebration
15-21 Nisan; 15-22 Nisan in the Diaspora
Day 2 of 7
Seven days in the Land of Israel and among Reform communities. Eight in much of the Diaspora.

The Week Ahead

This Week In Science History

Download Card

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.