One of the most important rituals of Rosh Hashanah is the sounding of the Shofar. The Shofar is a trumpet-like instrument (one of the reasons that many trumpet players are good at the Shofar) made from a ram's horn, on which three "notes" (or rhythms) are played: T'kia, T'ruah, and Sh'varim. The Shofar is played in important occasions, such as Rosh Hashanah and Yom Kippur, to announce something important. In the case of Rosh Hashanah, it's played to announce the new year. It is said that when the Moshiach (the Messiah) comes, a great shofar will blast.