The origins of Rosh Hashanah may be sought in a royal enthronement ritual of biblical times, though the Bible itself never mentions the “New Year” or “Day of Judgment” aspects of the holiday. Even though Rosh Hashanah falls in the seventh month, later rabbinic tradition decided to designate it the beginning of the year. Although the origin of this tradition may have been adopted from the Babylonians, the rabbis imbued it with Jewish significance as the anniversary of the day on which the world was created, or of the day on which humanity was created. Another explanation can be found in the significance of Tishrei as the seventh month, hence the Sabbath of the year.
Each of these sections culminates in the blasts of the Shofar, the most potent symbol of the holiday. The shofar is alluded to in the most memorable Torah reading for the holiday, the Akedah or Binding of Isaac(Genesis 22). The story and the shofar serve as reminders of the covenant between God and the people of Israel, carrying with them the message of sacrifice, hope, and continuity. Among the popular traditions associated with the holiday is a ceremony performed on the afternoon of the first day of Rosh Hashanah called tashlikh, when people throw crumbs or pieces of bread, symbolizing their sins, upon flowing water.