Jerusalem: Feldheim, 1996.
Revised Edition. Hardcover. Very Good with no dust jacket. Item #15204
Slight wear. Solid hardcover.; "Thus the Jewish calendar is Luni-Solar. It is in contrast to our civil calendar, the Gregorian, which is purely solar, and in which the months have completely lost their relation to the moon. But it is also quite different from the Mohammedan calendar, an absolute lunar system, in which every month follows the moon closely but wanders through all four seasons during the period of 33 years. Unlike these, which are either entirely solar or altogether lunar, the Jewish calendar must meed two requirements, both solar and lunar. This accounts for its relatively complicated structure. Since the solar year of about 365 days is approximately 11 days longer than 12 lunar months, the Jewish calendar is faced with the problem of balancing the solar with the lunar years." - Historical Remarks on the Jewish Calendar. ; 16,  pages.