Some Little-Known Jewish Calendar Facts
The Jewish calendar is a lunisolar calendar because the Torah requires Passover to fall in “Hodesh Ha-Aviv,” the month of spring. If the Jewish calendar were not linked to the seasons, ruled by the Sun, the Jewish calendar would retrogress about 11 days a year, or one season every eight years. The calendar achieves this balance by adding thirty-day month 7 times every 19 years, a scheme learned during the Babylonian captivity and taught by the Greeks. Rosh Hashanah falls early or late every year compared to the secular calendar because these “make-up days” are sometimes added two years and sometimes three years apart, rather than annually. [Fred Reiss, Ed.D]
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Fred Reiss, EdD, Jewish History, Jewish Religion












