I thought it was December 24th? Or am I’m confused?
Sunday the 28th Gregorian was the second Sunday before Christmas on the Julian (and Coptic) calendars, and in the Byzantine Rite this was the Sunday of the Holy Forefathers, with the last Sunday of Advent being the Sunday of the Fathers.
I can post to my thread on the Menaion the propers for the Divine Office and Divine Liturgy on those days, if you wish, but this lovely hymn called an Aposticha Stichera from Vespers explains the concept of last Sunday:
“Come, ye who love the feasts of the Church, and with psalms let us praise the assembly of the forefathers: Adam, the forefather of us all, Enoch, Noah, Melchizedek, Abraham, Isaac and Jacob; and, after the Law, Moses and Aaron, Joshua, Samuel and David, and with them Isaiah, Jeremiah, Ezekiel, Daniel and the twelve prophets, together with Elijah, Elisha and all the rest, Zechariah and the Forerunner; who all preached Christ, the Life and Resurrection of our race.”
The same Stichera appears at a different place in the liturgy this coming Sunday.