Hebrew leap year
It seems like someone is always commenting, “Yontef is really early/late this year!”
I decided to look into it using 817 years of data, from 1583 through 2399. Why 1583? Because that’s the first full year after the transition to the Gregorian calendar. Why stop at 2399? That seemed like enough. ¯\_(ツ)_/¯
Early, on time, and late are defined as the first, middle, and last third of occurrences (not dates) for each holiday. In other words, the earliest third of occurrences are considered early, not the earliest third of dates. All dates are erev, meaning the holiday starts that evening.
This is on Github.