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The Passover Seder (/ˈseɪdər/; Hebrew: סדר פסח [ˈseider ˈpeisax], 'Passover order/arrangement'; Yiddish: סדר [ˈseider]) is a ritual feast at the beginning of the Jewish holiday of Passover. It is conducted throughout the world on the eve of the 15th day of Nisan in the Hebrew calendar (i.e., at the start of the 15th; a Hebrew day begins at sunset). The day falls in late March or in April of the Gregorian calendar; Passover lasts for seven days in Israel and eight days outside Israel. Jews traditionally observe one seder if in Israel and two (one on each of the first two nights) if in the Jewish diaspora. The Seder is a ritual involving a retelling of the story of the liberation of the Israelites from slavery in ancient Egypt, taken from the Book of Exodus (Shemot) in the Jewish Torah. The