This year, 5779, is the longest possible year on the Jewish calendar. Not only is it a leap year, but Cheshvan and Kislev both have 30 days, for a total of 385 days. How often does that happen?
asked Mar 3, 2019 at 1:02
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1 Answer
It happens in 1371/8512 years, which is about 16.1%.
answered Mar 3, 2019 at 1:06
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5Could you add something about how you arrived at (or sourced) that number? Mar 3, 2019 at 2:01
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Where do you get 1371/8512 from? My reading of the Tur’s chart gives 40/247, which is slightly off but still rounds to 16.1%. Where does the difference come from? (And what does 8512 represent? I know of 19 year cycles, 247 year cycles, and over 600K year cycles, but 8512 is new to me.)– DonielFMar 3, 2019 at 2:51
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@doni the difference is from judaism.stackexchange.com/q/64074/759 and see edits– Double AA ♦Mar 3, 2019 at 3:07
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