Commemorated November 8.
From the OCA website:
The Synaxis of the Chief of the Heavenly Hosts, Archangel Michael and
the Other Heavenly Bodiless Powers: Archangels Gabriel, Raphael, Uriel,
Selaphiel, Jehudiel, Barachiel, and Jeremiel was established at the
beginning of the fourth century at the Council of Laodicea, which met
several years before the First Ecumenical Council. The 35th Canon of the
Council of Laodicea condemned and denounced as heretical the worship of
angels as gods and rulers of the world, but affirmed their proper
A Feastday was established in November, the ninth
month after March (with which the year began in ancient times) since
there are Nine Ranks of Angels. The eighth day of the month was chosen
for the Synaxis of all the Bodiless Powers of Heaven since the Day of
the Dread Last Judgment is called the Eighth Day by the holy Fathers.
After the end of this age (characterized by its seven days of Creation)
will come the Eighth Day, and then “the Son of Man shall come in His
Glory and all the holy Angels with Him” (Mt. 25:31).
The Angelic Ranks are divided into three Hierarchies: highest, middle, and lowest.
The Highest Hierarchy includes: the Seraphim, Cherubim and Thrones.
six-winged SERAPHIM (Flaming, Fiery) (Is 6:12) stand closest of all to
the Most Holy Trinity. They blaze with love for God and kindle such love
The many-eyed CHERUBIM (outpouring of wisdom,
enlightenment) (Gen 3:24) stand before the Lord after the Seraphim. They
are radiant with the light of knowledge of God, and knowledge of the
mysteries of God. Through them wisdom is poured forth, and people’s
minds are enlightened so they may know God and behold His glory.
THRONES (Col 1:16) stand after the Cherubim, mysteriously and
incomprehensibly bearing God through the grace given them for their
service. They are ministers of God’s justice, giving to tribunals,
kings, etc. the capacity for righteous judgment.
You can read the rest here.