And one of the most fascinating pieces of that puzzle is the concept of intercalation – adding an extra month to the calendar in certain years to keep our lunar calendar aligned with the solar year.
It's all about cycles, you see. Specifically, a 19-year cycle. Now, within that big 19-year cycle, we find what Pirkei DeRabbi Eliezer (Chapter 8, to be exact) calls "small cycles." These are groupings of years where that extra month, Adar Sheni (a second Adar), gets inserted. These "small cycles" aren't all uniform, mind you. Some are separated by 3 years, others by 2. Sometimes it's a 3 and then a 2, or even a 3, 3, and 3 in a row.
Think of it like a dance, a cosmic waltz where the sun and the moon are constantly trying to stay in sync. These cycles of 3 and 2 years are the steps of that dance, the adjustments we make to keep the rhythm flowing smoothly. The specific years where we add that extra month? They fall on the 3rd, 6th, 8th, 11th, 14th, 17th, and 19th years of the cycle. And as the text points out, there are two sets of three-year cycles in this pattern.
Okay, deep breath. That's the technical stuff. But what's truly amazing is the moment that all this calendar calculation gets connected to.
According to Pirkei DeRabbi Eliezer, it was on Rosh Chodesh Nisan – the New Moon of Nisan – that God revealed Himself to Moses and Aaron in Egypt. It was the 15th year of what's called the "great cycle" of the moon, and the 16th year of this cycle of intercalation we've been discussing. And God said, "Henceforward the counting devolves on you." Meaning, from this point on, you, the Jewish people, are responsible for keeping track of time, for marking the sacred moments, for understanding the rhythms of the universe. for a second. It wasn’t just about telling time. It was about empowerment, about handing over the keys to the cosmic clock. It was a charge, a responsibility, and a profound connection to something larger than ourselves.
So the next time you look at a Jewish calendar, remember that intricate dance of intercalation, that careful balancing act between the sun and the moon. And remember that it all began with a divine revelation on a New Moon in Egypt, a moment when we were entrusted with the sacred task of counting, remembering, and celebrating the passage of time. Doesn't that make you look at the calendar in a whole new light?