Rosh HaShanah 2022 shows how the priesthood determines (or recognizes) the Head of the Hebrew Year. This is the same calendar as taught to Israel by Moshe (Moses) in the wilderness of Sinai, and was still practiced in the first century, in the time of Yeshua (Jesus). Although it uses barley data from 2022, it applies equally to any year.
Watch: Aviv Barley Simplified
Watch: Where is Spring Commanded?
Watch: Where is Equinox Commanded?