Sunday of the Holy Forefathers or Sunday of the Holy Forefathers of Jesus Christ is a Christian holiday that is always celebrated on a Sunday and always on the second Sunday before Christmas in the Eastern Orthodox Church and in the Eastern Catholic Churches using the Byzantine Rite. The beginning of the celebration is December 11.[1] If December 11th were to be a weekday then the holiday is postponed until the following Sunday. These cases can be perceived in the year 2019, December 11 was a Wednesday, therefore, the holiday was celebrated four days later on Sunday, December 15.
The Sunday that is usually from December 11 to 17 is known as the Sunday of the Holy Forefathers. The ancestors of the Old Testament. Those who lived before and under the Law, and those of the flesh, namely the Patriarch Abraham whom the Lord said unto “In thy seed shall all of the nations of the earth be blessed” (Genesis 12:3; 22:18).[2]
"You justified the Forefathers by faith, and through them betrothed yourself, aforetime, to the Church taken from out of the Gentiles. The saints boast in glory, for from their seed, there exists a noble crop, who is she who without seed has given You birth. By their intercessions, O Christ our God, save our souls."[3]
"You did not worship the graven image, O thrice-blessed ones, but armed with the immaterial Essence of God, you were glorified in a trial by fire. From the midst of unbearable flames you called on God, crying: Hasten, O compassionate One! Speedily come to our aid, for You are merciful and able to do as You will."[4]
The Great Patriarchs and Matriarchs of the Old Testament, including the Patriarchs Adam, Abraham, Isaac, and Jacob. The feast also commemorates the Holy Prophets such as Daniel, Ezekiel, and Elijah, judges, kings, and all who lived of the flesh and under the Law.