How Often Does The Jewish Calendar Add A Month. The jewish calendar is a lunisolar calendar, following both the sun (for the seasons) and the moon (for the months). In distinction to the day added to the secular leap year, the jewish calendar adds a full month to the end of its year.
In the present day, and for many centuries, this very primitive manner of fixing the beginning of the month has given way to a systematic calculation of the latter’s duration, and the. This complex system which dates back nearly 2,000 years is a.