Longest Jewish year












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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?






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    2















    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?






    calendar statistics







    share|improve this question



























      2












      2








      2








      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?






      calendar statistics







      share|improve this question
















      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?






      calendar statistics




      calendar statistics






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited 1 hour ago









      DonielF

      14.2k12380




      14.2k12380










      asked 2 hours ago









      Maurice MizrahiMaurice Mizrahi

      1,822215




      1,822215






















          1 Answer
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          It happens in 1371/8512 years, which is about 16.1%.






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          • 1





            Could you add something about how you arrived at (or sourced) that number?

            – Monica Cellio♦
            1 hour ago











          • 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.)

            – DonielF
            58 mins ago













          • @doni the difference is from judaism.stackexchange.com/q/64074/759 and see edits

            – Double AA♦
            42 mins ago











          • Ah, makes sense now. So 8512 doesn’t mean anything in particular, that’s just the most reduced fraction?

            – DonielF
            40 mins ago



















          1 Answer
          1






          active

          oldest

          votes








          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          2














          It happens in 1371/8512 years, which is about 16.1%.






          share|improve this answer





















          • 1





            Could you add something about how you arrived at (or sourced) that number?

            – Monica Cellio♦
            1 hour ago











          • 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.)

            – DonielF
            58 mins ago













          • @doni the difference is from judaism.stackexchange.com/q/64074/759 and see edits

            – Double AA♦
            42 mins ago











          • Ah, makes sense now. So 8512 doesn’t mean anything in particular, that’s just the most reduced fraction?

            – DonielF
            40 mins ago
















          2














          It happens in 1371/8512 years, which is about 16.1%.






          share|improve this answer





















          • 1





            Could you add something about how you arrived at (or sourced) that number?

            – Monica Cellio♦
            1 hour ago











          • 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.)

            – DonielF
            58 mins ago













          • @doni the difference is from judaism.stackexchange.com/q/64074/759 and see edits

            – Double AA♦
            42 mins ago











          • Ah, makes sense now. So 8512 doesn’t mean anything in particular, that’s just the most reduced fraction?

            – DonielF
            40 mins ago














          2












          2








          2







          It happens in 1371/8512 years, which is about 16.1%.






          share|improve this answer















          It happens in 1371/8512 years, which is about 16.1%.







          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited 2 hours ago

























          answered 2 hours ago









          Double AA♦Double AA

          78k6188410




          78k6188410








          • 1





            Could you add something about how you arrived at (or sourced) that number?

            – Monica Cellio♦
            1 hour ago











          • 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.)

            – DonielF
            58 mins ago













          • @doni the difference is from judaism.stackexchange.com/q/64074/759 and see edits

            – Double AA♦
            42 mins ago











          • Ah, makes sense now. So 8512 doesn’t mean anything in particular, that’s just the most reduced fraction?

            – DonielF
            40 mins ago














          • 1





            Could you add something about how you arrived at (or sourced) that number?

            – Monica Cellio♦
            1 hour ago











          • 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.)

            – DonielF
            58 mins ago













          • @doni the difference is from judaism.stackexchange.com/q/64074/759 and see edits

            – Double AA♦
            42 mins ago











          • Ah, makes sense now. So 8512 doesn’t mean anything in particular, that’s just the most reduced fraction?

            – DonielF
            40 mins ago








          1




          1





          Could you add something about how you arrived at (or sourced) that number?

          – Monica Cellio♦
          1 hour ago





          Could you add something about how you arrived at (or sourced) that number?

          – Monica Cellio♦
          1 hour ago













          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.)

          – DonielF
          58 mins ago







          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.)

          – DonielF
          58 mins ago















          @doni the difference is from judaism.stackexchange.com/q/64074/759 and see edits

          – Double AA♦
          42 mins ago





          @doni the difference is from judaism.stackexchange.com/q/64074/759 and see edits

          – Double AA♦
          42 mins ago













          Ah, makes sense now. So 8512 doesn’t mean anything in particular, that’s just the most reduced fraction?

          – DonielF
          40 mins ago





          Ah, makes sense now. So 8512 doesn’t mean anything in particular, that’s just the most reduced fraction?

          – DonielF
          40 mins ago



          -

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