Passover
Seder (Hebrew: סֵדֶר,
Translation:order, arrangement)

The Passover Seder is a Jewish ritual feast held at the beginning
of the Jewish holiday of Passover.[1] The Seder is an
intergenerational family ritual prescribed according to Jewish law
and based on the interpretation of the Biblical verse commanding
Jews to retell the story of the Exodus from Egypt: "And you shall
tell it to your son on that day, saying, 'Because of this God did
for me when He took me out of Egypt.'" (Exodus 13:8)
Traditionally, families and friends gather in the evening to read
the text of the Haggadah, an ancient work derived from the seder
service prescribed by the Mishnah (Pesahim 10) including the
narrative of the Israelite exodus from Egypt, special blessings and
rituals, commentaries from the Talmud, and special Passover songs.
Seder customs include drinking of four cups of wine, eating matza
and partaking of symbolic foods placed on the Passover Seder Plate.
With a Haggadah serving as a guide, the Seder is performed in much
the same way by Jews all over the world.
Jews generally observe one or two seders: in Israel, one seder is
observed on the first night of Passover; in the Diaspora
communities other than Reform and Reconstructionist Jews hold a
seder also on the second night.