There are seven major feasts in the Hebrew calendar. Of these, the most important are "Great Feasts" of Pesach (Passover`), Shavuot (Pentecost) and Sukkot (Tabernacles). They are known as the Great Feasts because their observance is commanded in the Law of Moses. On these occasions, every able-bodied man in Israel was commanded to present himself before the Lord, in Jerusalem.
Rosh Ha-Shanah (The Feast of Trumpets) is held on the first day on the month of Tishri and marks the start of the civil new year. It is followed ten days later by Yom Kippur (the Day of Atonement) and on the 15th day, by the joyous Feast of Tabernacles.