The Passover Seder (English pronunciation: ˈseɪ dəɹ; in Hebrew:סֵדֶר‎ [ˈsedeʁ], meaning "order, arrangement"; and in Yiddish: "seyder") is a Jewish ritual feast that marks the beginning of the Jewish holiday of Passover. It is conducted on the evening of the 15th day of Nisan in the Hebrew calendar throughout the world. This corresponds to late March or April in the Gregorian calendar. Passover lasts for 7 days in Israel and 8 days outside of Israel (other than for adherents of Reform Judaism for whom Passover is 7 days regardless of location), with Jews outside of Israel other than Reform Jews holding two Seders (on the evening of the 15th and 16th of Nisan) and Jews in Israel and Reform Jews worldwide holding one Seder (on the 15th of Nisan).