One counts the Jubilee as interrupting the yearly Sabbath cycle. In this method, you have seven sets of seven years followed by a fiftieth year, which then resets the count. The other school of thought counts the Jubilee as synchronized with the Sabbath cycle. In this method, the first and the last year of the Jubilee cycle overlap once every fifty years.
( William Struse )
[ The 13th Prime: Deciphering ]
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