The best-known ritual of Rosh Hashanah is the blowing of the shofar, a musical instrument made from an animal horn. The shofar is blown at various instances during the Rosh Hashanah prayers, with a total of 100 blasts over the day.[18]
While the blowing of the shofar is a Biblical statute, it is also a symbolic "wake-up call", stirring Jews to mend their ways and repent. The shofar blasts call out: "Sleepers, wake up from your slumber! Examine your ways and repent and remember your Creator."
Customs and Symbols of Rosh Hashanah
Apples and honey: One of the most popular Rosh Hashanah customs involves eating apple slices dipped in honey, sometimes after saying a special prayer. Ancient Jews believed apples had healing properties, and the honey signifies the hope that the new year will be sweet. Rosh Hashanah meals usually include an assortment of sweet treats for the same reason.
Round challah: On Shabbat (the Jewish Sabbath) and other holidays, Jews eat loaves of the traditional braided bread known as challah. On Rosh Hashanah, the challah is often baked in a round shape to symbolize either the cyclical nature of life or the crown of God. Raisins are sometimes added to the dough for a sweet new year