Michaelmas, celebrated on September 29th, is a Christian feast day dedicated to St. Michael the Archangel, along with the archangels Gabriel and Raphael. It marks the beginning of autumn and has long been associated with the harvest, symbolizing the end of summer's abundance. Traditionally, it was a time of gathering harvests, settling debts, and preparing for the coming winter. The day is also known for its customs, such as eating goose (known as a "Michaelmas goose") and baking special dishes like bannocks. Michaelmas serves as a reminder of the strength and protection of St. Michael, who is often invoked as a guardian against evil.

In the Orthodox Christian tradition, the feast of St. Michael the Archangel and all the Bodiless Powers of Heaven is often celebrated on November 8th. This feast, also known as the Synaxis of the Archangel Michael and the Other Bodiless Powers, honors all the angels, especially the archangels Michael, Gabriel, and Raphael. This differs from the Western Christian observance of Michaelmas on September 29th. The difference in dates reflects the divergence between Western and Eastern liturgical calendars and traditions.