The Jubilee (Hebrew יובל yūḇāl) year is the year at the end of seven cycles of shmita (Sabbatical years), and according to Biblical regulations had a special impact on the ownership and management of land in the Land of Israel; there is some debate whether it was the 49th year (the last year of seven sabbatical cycles, referred to as the Sabbath's Sabbath), or whether it was the following (50th) year. Jubilee deals largely with land, property, and property rights. According to Leviticus, slaves and prisoners would be freed, debts would be forgiven, and the mercies of God would be particularly manifest. Leviticus 25:8-13 states:
You shall count off seven Sabbaths of years, seven times seven years; and there shall be to you the days of seven Sabbaths of years, even forty-nine years. Then you shall sound the loud trumpet on the tenth day of the seventh month. On the Day of Atonement you shall sound the trumpet throughout all your land. You shall make the fiftieth year holy, and proclaim liberty throughout the land to all its inhabitants. It shall be a jubilee to you; and each of you shall return to his own property, and each of you shall return to his family. That fiftieth year shall be a jubilee to you. In it you shall not sow, neither reap that which grows of itself, nor gather from the undressed vines. For it is a jubilee; it shall be holy to you. You shall eat of its increase out of the field. In this Year of Jubilee each of you shall return to his property. (WEB)
The biblical rules concerning Sabbatical years (shmita) are still observed by many religious Jews in Israel, but the regulations for the Jubilee year have not been observed for many centuries. According to the Torah, observance of Jubilee only applies when the Jewish people live in the land of Israel according to their tribes. Thus, with the exile of the tribes of Reuben, Gad, and Manasseh (about 600 BCE), Jubilee has not been applicable.
The Septuagint rendered the Hebrew yovel as "a trumpet-blast of liberty" (ἀφέσεως σημασία afeseos semasia), and the Vulgate by Latin . Traditionally, it was thought that the English term Jubilee derives from the Hebrew term yobel (via Latin Jubilaeus), which in turn derives from yobhel, meaning ram; the Jubilee year was announced by a blast on a shofar, an instrument made from a ram's horn, during that year's Yom Kippur.