Sukkot is celebrated by, first of all, building a sukkah. Jews are required to eat in the sukkah for eight days (seven days in Israel), and some even sleep in the sukkah for the duration of the holiday. The sukkah is decorated and the first day is considered a holy day in which most forms of work are forbidden. The rabbis dictated that arbat ha’minim (four species) should be held together and waved during the holiday. These are based on four plants mentioned in the Bible, and the rabbinic version includes the following: etrog (fruit of the citron tree), lulav (palm frond), hadas (leaves from the myrtle tree), and aravah(leaves from the willow tree). This waving ceremony was performed at the Temple in the ancient world.
The seventh day of Sukkot is called Hoshanah Rabah. On that day in the synagogue Jews circle the room seven times while the arbat ha’minim are held and special prayers are recited.