Happy Easter & Happy Passover!
Good Friday, April 15, 2022 / Erev Pesach, Yom Shishi, 14 Nisan, 5782.
By happy coincidence, this day is important for both Easter and Passover: Good Friday today, and the first Passover Seder tonight, after sundown.
But how do we know when it’s Easter or when it’s Passover?
Since this blog post is being hosted by the British Society for the History of Mathematics website, let’s hear what a historic British authority on Christian Calendrics had to say: