לוח ס"א ראשים ככלי לחישוב שכיחות סדרות של סימני שנים

The year 5775 begins a sequence of five consecutive years in which four of them have Passover occurring on Saturday. This article examines the phenomenon and presents a computational method for finding its prevalence. The calculation method is based on considering the “Table of 61 Rows” as a table that represents 36,288 19-year cycles, consisting of 689,472 years, which form a complete cycle of the Jewish calendar. As a result, the “region” that the desired phenomenon occupies in relation to the overall area of the table directly yields the frequency of the desired sequence. In the Appendix we present a proof that the area of the 61-Row Table is in complete correspondence to the cycle of new moons in the Jewish calendar – 689,472 years. The method demonstrated in the article can be generalized to any desired sequence of simanei hashana.