Leviticus 23:1-2 And the LORD spake unto Moses, saying, Speak unto the children of Israel, and say unto them, Concerning the feasts of the LORD, which ye shall proclaim to be holy convocations, even these are my feasts.
Also on the tenth day of this seventh month there shall be a day of atonement: it shall be an holy convocation unto you; and ye shall afflict your souls, and offer an offering made by fire unto the LORD. For your best Atonement offering get this dynamic teaching lesson by Paula White, and increase your knowledge of God's most Holy day of the calendar year!