Biblically, the Feast of Trumpets was commanded by God as a memorial and holy convocation in Leviticus 23:23-27, and it was a time when the people reflected on what God had done before, and a time to set themselves apart for him again. The rabbis have traditionally held the belief that the world was created at this time, which is why Yom Teruah also became known as the Jewish new year. However, Passover is the actual biblical new year.