On the Sunday that falls from the 13th to the 19th of the present month, we chant the Service to the 630 Holy and God-bearing Fathers who came together for the 4th Ecumenical Council who assembled in Chalcedon in 451, to condemn Eutyches, who taught that there was only one nature, the divine, in Christ after the Incarnation, and Dioscorus, Patriarch of Alexandria, who illegally received Eutyches back into communion and deposed Saint Flavian, Patriarch of Constantinople, who had excommunicated Eutyches.

In the Slavic tradition, on this Sunday, the Fathers of the first six Ecumenical Councils are all commemorated.

It is believed that the Synaxis of the Archangel Gabriel was transferred to this day from March 26 so that it could be celebrated more festively than in the period of the Great Fast; and, in fact, all the miracles of the Archangel are celebrated on this feast day, which has been listed here in the church books since the ninth century.

Saint Aquila, who was from Pontus of Asia Minor, was a Jew by race and a tent-maker by trade. In the year 52 he and his wife Priscilla were in Corinth when Saint Paul first came there. They gave him hospitality, and the Apostle remained with them for many days, himself working at the same trade as they (Acts 18:2-3). And having believed in Christ through Paul, they followed him from that time on, working together with him and suffering perils with him for the sake of the preaching of the Gospel, as he himself testifies concerning them in his Epistle to the Romans, saying: "Greet Priscilla and Aquila, my helpers in Christ Jesus: who have for my life laid down their own necks: unto whom not only I give thanks, but also all the churches of the nations" (Rom. 16:3-4). When and where they reposed is unknown.

Saint Julitta was from the city of Iconium. Fearing the persecution of Diocletian, she took her son Cyricus, who was three years old, and departed for Seleucia; but finding the same evil there, she went over to Tarsus in Cilicia, where the ruler arrested her. He took her son from her and tried with flatteries to draw the youth to himself. But the little one, in his childish voice, called on the Name of Christ and kicked the ruler in the belly so hard, that the tyrant became enraged and cast him down the steps of the tribunal. In this manner, the child's head was crushed, and he gave up the spirit. As for his blessed mother, she first endured many torments, and finally was beheaded in the year 296.

This Saint was from Sebastia of Cappadocia and , according to the Synaxaristes, became Bishop of Pidachthoa. He and ten of his disciples were tortured and beheaded by the Governor of Philomarchus in the times of Diocletian. There is a second Martyr Athenogenes commemorated today, mentioned by Saint Basil in Chapter 29 of his treatise "On the Holy Spirit"; it is said that as this Athenogenes approached the fire, wherein he was to die a martyric death, he chanted the hymn O Joyous Light in praise of the Holy Trinity (see also Mar. 11).

This Martyr was from Dorostolum in Thrace, the servant of a certain pagan in the days of Julian the Apostate (361-363). As a fervent Christian, Emilian abominated the error of the pagans, and one day entered the temple and broke all the idols with a hammer. Seeing that others were arrested and beaten for this, he gave himself up of his own accord. He was mercilessly whipped, then cast into a fire, in which he gave up his soul without his body suffering harm.

Saint Macrina, the elder sister of Saints Basil the Great and Gregory of Nyssa, was sought after by many as a bride because of her beauty, wisdom, and illustrious birth, and in tender youth was espoused by her parents to a bridegroom of fitting nobility. When her betrothed died, Macrina refused any other suitors, and devoted herself to a life of virginity, asceticism, and prayer. When her brother Basil returned from a brilliant career in the best schools of Constantinople and Athens, puffed up with not a little youthful pride-for knowledge puffeth up-it was the ardent admonitions and holy example of his blessed sister that persuaded him to turn from seeking worldly glory to the service of God. Saint Macrina founded a convent, where she ended her earthly life in the year 379, and was buried by her brother Gregory, who wrote a moving account of her last days and his grief at seeing such a light pass out of the world.