Shofar (שופר) is an unadorned animal horn used as a Jewish religious instrument on a ceremonial occasions. It is made from the horn of a ram (it is necessary to use a ram's horn during the festival of Rosh Hashana) and other kosher animals like goats, antelopes or gazelles (except for a cow's or calf's ram). According to the Torah a sound of Shofar was heard for the first time during G-d's revelation at Mount Sinai. Shofar is traditionally used during the festival of Rosh Hashanah, when is blown after each morning service. The sound of Shofar also announces the end of fasting on Yom Kippur and the inauguration of President of Israel. There is a prescribed way how to blow Shofar over particular Jewish festivals, which must be followed.