The observance of St. Michael’s day is one of the oldest in the church liturgical calendar. In the Western Lutheran and Anglican traditions, this feast day celebrates all angels on this day, not just St. Michael. In the Roman and Eastern traditions, these celebrations are split into two separate feast days.

Traditional has it that St. Michael the Archangel was the leader of angels who remained faithful to God and cast out Satan at God’s command.

On this day we read of Satan’s defeat from Revelation 12:

And war broke out in heaven: Michael and his angels fought with the dragon; and the dragon and his angels fought, but they did not prevail, nor was a place found for them in heaven any longer. So the great dragon was cast out, that serpent of old, called the Devil and Satan, who deceives the whole world; he was cast to the earth, and his angels were cast out with him. Then I heard a loud voice saying in heaven, “Now salvation, and strength, and the kingdom of our God, and the power of His Christ have come, for the accuser of our brethren, who accused them before our God day and night, has been cast down. And they overcame him by the blood of the Lamb and by the word of their testimony, and they did not love their lives to the death. Therefore rejoice, O heavens, and you who dwell in them! Woe to the inhabitants of the earth and the sea! For the devil has come down to you, having great wrath, because he knows that he has a short time.” (Rev 12.7-12, NKJV)

And we pray, “Everlasting God, You have ordained and constituted the service of angels and men in a wonderful order. Mercifully grant that, as Your holy angels always serve and worship You in heaven, so by Your appointment they may also help and defend us here on earth; through Your Son, Jesus Christ our Lord, who lives and reigns with You and the Holy Spirit, one God, now and forever.”