What was the sacrifice of atonement for a year's sins in
the Old Testament?
It was the sacrifice of atonement
for a year's worth of Israel's sins all at once. The High
Priest laid his hands on the head of a goat and passed on
a year's sins of all the people of Israel all at once (Leviticus
Jesus Christ completed the sacrifices
for a day's sin and a year's sins when He became the Lamb
of God to take all sin onto His head through His baptism.