Secular Year: There is no such thing as a Secular Year. The miss-understanding comes from the statement in Leviticus 23 that Aviv is the first of the months, but that does not mean that Aviv is the first month of the year. 2 Samuel 11.1. And it happened at the return of the year, at the time when kings go forth to battle, that David sent Joab and his servants with him, and all Israel. The turn of the year is at the fall ingathering. Exodus 34:22. And you will observe the Feast of Weeks of the First Fruits of wheat harvest (Shavuot), and the Feast of Ingathering (Sukkot) at the year’s end.