The liturgy celebrates the feast of these three archangels who are venerated in the tradition of the Church. Michael (Who is like God?) was the archangel who fought against Satan and all his evil angels, defending all the friends of God. He is the protector of all humanity from the snares of the devil. Gabriel (Strength of God) announced to Zachariah the forthcoming birth of John the Baptist, and to Mary, the birth of Jesus. His greeting to the Virgin, "Hail, full of grace," is one of the most familiar and frequent prayers of the Christian people. Raphael (Medicine of God) is the archangel who took care of Tobias on his journey.

      St. Michael – The name of the archangel Michael means, in Hebrew, who is like unto God? and he is also known as "the prince of the heavenly host". He is usually pictured as a strong warrior, dressed in armour and wearing sandals. His name appears in Scripture four times, twice in the Book of Daniel, and once each in the Epistle of St. Jude and the Book of Revelation. From Revelation we learn of the battle in heaven, with St. Michael and his angels combatting Lucifer and the other fallen angels (or devils). We invoke St. Michael to help us in our fight against Satan; to rescue souls from Satan, especially at the hour of death; to be the champion of the Jews in the Old Testament and now Christians; and to bring souls to judgment.

This day is referred to as "Michaelmas" in many countries and is also one of the harvest feast days. In England this is one of the "quarter days", which was marked by hiring servants, electing magistrates, and beginning of legal and university terms.

      St. Gabriel - This name means "God is my strength". Biblically he appears three times as a messenger. He had been sent to Daniel to explain a vision concerning the Messiah. He appeared to Zachary when he was offering incense in the Temple, to foretell the birth of his son, St. John the Baptist. St. Gabriel is most known as the angel chosen by God to be the messenger of the Annunciation, to announce to mankind the mystery of the Incarnation.

      The angel's salutation to our Lady, so simple and yet so full of meaning, Hail Mary, full of grace, has become the constant and familiar prayer of all Christian people.

      St. Raphael - Our knowledge of the archangel Raphael comes to us from the book of Tobit. His mission as wonderful healer and fellow traveller with the youthful Tobias has caused him to be invoked for journeys and at critical moments in life. Tradition also holds that Raphael is the angel that stirred the waters at the healing sheep pool in Bethesda. His name means "God has healed".