In Eastern Christianity, Synaxis of the Archangel Michael & the other Bodiless Powers, which was established at the beginning of the fourth century, affirmed the proper veneration of angels as ministering spirits, sent forth by God as overseers of every nation and people. This occassion commemorates the Archangel Michael & the other angels including Gabriel, Raphael, Uriel, Salaphiel, Jegudiel, & Barachiel.
Here are some ways you can observe this day according to Eastern Christian tradition: