The Jewish calendar is a lunar calendar based upon the phases of the moon. Every month, special prayers are recited to welcome in the new month, called Rosh Chodesh, according to the Hebrew calendar, which adds one month during leap years every third, sixth, eighth, eleventh, fourteenth, seventeenth and nineteenth year in order for the lunar year to catch up with the solar year. Thus, every nineteen years, there are seven leap years in the Jewish calendar.

Cost: $7 per adult; $3 per student; healthy foods and discussion materials included.