Passover, or Pesach in Hebrew, is a major Jewish spring
festival commemorating the Exodus from Egypt over 3,000 years ago. The ritual
observance of this holiday centers around a special home service called the
seder (meaning "order") and a festive meal; the prohibition of
chametz (leaven); and the eating of matzah (an unleavened bread). On the eve of
the fifteenth day of Nisan in the Hebrew calendar, we read from a book called
the hagaddah, meaning "telling," which contains the order of
prayers, rituals, readings and songs for the Passover seder.