Collect of the Day:
Everlasting God, you have ordained and constituted in a wonderful order the ministries of angels and mortals: Mercifully grant that, as your holy angels always serve and worship you in heaven, so by your appointment they may help and defend us here on earth; through Jesus Christ our Lord, who lives and reigns with you and the Holy Spirit, one God, for ever and ever. Amen.
A Reading from the Revelation to John:
And war broke out in heaven; Michael and his angels fought against the dragon. The dragon and his angels fought back, but they were defeated, and there was no longer any place for them in heaven. The great dragon was thrown down, that ancient serpent, who is called the Devil and Satan, the deceiver of the whole world—he was thrown down to the earth, and his angels were thrown down with him.
Then I heard a loud voice in heaven, proclaiming, “Now have come the salvation and the power and the kingdom of our God and the authority of his Messiah, for the accuser of our comrades has been thrown down, who accuses them day and night before our God.
But they have conquered him by the blood of the Lamb and by the word of their testimony, for they did not cling to life even in the face of death.
Rejoice then, you heavens and those who dwell in them! But woe to the earth and the sea, for the devil has come down to you with great wrath, because he knows that his time is short!” (Rev. 12:7-12)
More on the ways folks have celebrated St. Michael from Google Books: