Sukkot (Hebrew: סוכות or סֻכּוֹת sukkōt or sukkos, Feast of Booths, Feast of Tabernacles) is a biblical holiday celebrated on the 15th day of the month of Tishrei (late September to late October). It is one of the three biblically mandated festivals Shalosh regalim on which Hebrews were commanded to make a pilgrimage to the Temple in Jerusalem. It follows the solemn holiday of Yom Kippur, or the Day of Atonement.
The holiday lasts seven days (eight in the diaspora). The first day (and second in the diaspora) is a sabbath-like yom tov when work is forbidden, followed by the intermediate Chol Hamoed and Shemini Atzeret. The Hebrew word sukkōt is the plural of sukkah, "booth or tabernacle", which is a walled structure covered with skhakh (plant material such as leafy tree overgrowth or palm leaves).
The sukkah is intended as a reminiscence of the type of fragile dwellings in which the Israelites dwelt during their 40 years of travel in the desert after the Exodus from slavery in Egypt. Throughout the holiday, meals are eaten inside the sukkah and some people sleep there as well. On each day of the holiday, members of the household recite a blessing over the lulav and etrog (Four species).
According to the prophet Zechariah, in the messianic era Sukkot will become a universal festival and all nations will make pilgrimages annually to Jerusalem to celebrate the feast there.
Sukkot is agricultural in origin. This is evident from the biblical name "The Feast of Ingathering," from the ceremonies accompanying it, from the season – "The festival of the seventh month" – and occasion of its celebration: "At the end of the year when you gather in your labors out of the field" (Ex. 23:16);by its designation as "the Feast of the Lord" or simply "the Feast". Perhaps because of its wide attendance, Sukkot became the appropriate time for important state ceremonies. Moses instructed the children of Israel to gather for a reading of the Law during Sukkot every seventh year (Deut. 31:10-11). King Solomon dedicated the Temple in Jerusalem on Sukkot (1 Kings 8; 2 Chron. 7). And Sukkot was the first sacred occasion observed after the resumption of sacrifices in Jerusalem following the Babylonian captivity (Ezra 3:2-4).
In Leviticus, God told Moses to command the people: "On the first day you shall take the product of hadar trees, branches of palm trees, boughs of leafy trees, and willows of the brook" (Lev. 23:40), and "You shall live in booths seven days; all citizens in Israel shall live in booths, in order that future generations may know that I made the Israelite people live in booths when I brought them out of the land of Egypt" (Lev. 23:42-43).
Sukkot is a seven day holiday, with the first day celebrated as a full festival with special prayer services and holiday meals. The remaining days are known as Chol HaMoed ("festival weekdays"). The seventh day of Sukkot is called Hoshana Rabbah ("Great Hoshana", referring to the tradition that worshippers in the synagogue walk around the perimeter of the sanctuary during morning services) and has a special observance of its own. Outside Israel, the first two days are celebrated as full festivals. Throughout the week of Sukkot, meals are eaten in the sukkah and Orthodox Jewish families sleep there, although the requirement is waived in case of rain. Every day, a blessing is recited over the Lulav and the Etrog. Observance of Sukkot is detailed in the Book of Nehemiah and Leviticus 23:34-44 in the Bible, the Mishnah (Sukkah 1:1–5:8); the Tosefta (Sukkah 1:1–4:28); and the Jerusalem Talmud (Sukkah 1a–) and Babylonian Talmud (Sukkah 2a–56b).