Parley P. Pratt teaches that "Father Adam" is the "Ancient of Days"; all the faithful will stand before him at the beginning of the Millennium.
Parley P. Pratt, A Voice of Warning, Or, An Introduction The Faith and Doctrine of The Church of Jesus Christ of Latter-day Saints, 9th ed. (Salt Lake City: The Deseret News, 1874), 137
We now discovered the great secret, which none but the saints have understood, *but was well understood by them in all ages of the world,) which is this, that man is to dwell in the flesh, upon the earth, with the Messiah, with the whole house of Israel, and with all the Saints of the Most High, not only one thousand years, but for ever and ever. Then our father Adam, whose hair is white like the pure wool, will sit enthroned in dignity, as the Ancient of days, the great patriarch, the mighty Prince; while thousands of thousands stand before him, and ten thousand times ten thousand minister to him; there he will hail all his children, who died in the faith of the Messiah; while Abel, Enoch, Noah, Abraham, Job, and Daniel, with all the Prophets and Apostles, and all the Saints of God of all ages, hail each other in the flesh. Jesus the great Messiah will stand in the midst, and, to crown the whole, will gird himself, and administer bread and wine to the whole multitude, and he himself will partake of the same with them on the earth, all being clothed in fine linen, clean and white. This is the marriage supper of the Lamb. Blessed are they who partake thereof.