The Church of God is the Only Church That Keeps the Day of Atonement, the Feast of the Forgiveness of Sins. The Day of Atonement is the great day when all the sins of the people and the priests are forgiven. Christ Ahnsahnghong and God the Mother, the Reality of the Sanctuary and the Sacrifice for Atonement. In the Old Testament, all the sins of Israel were temporarily transferred to the sanctuary until the Day of Atonement. Today, all our sins have been transferred to Christ Ahnsahnghong and God the Mother, who are the reality of the sanctuary. Then, on the Day of Atonement, all our sins are transferred to Satan, who is the originator of sin. Eventually, Satan will be judged in the abyss, that is, hell and by then, all sins will finally disappear.