Michaelmas, 29 September

Michaelmas falls on the twenty ninth of September, the date this rule records, the feast of Saint Michael and All Angels, and its origin traces to the dedication of a basilica to Michael on the Via Salaria outside Rome, an event placed by tradition in the fifth or sixth century and commemorated ever since on this date across the Western church. The feast's theological content, honoring the archangel Michael alongside the angelic host generally, is relatively simple and stable compared to how much civic and social weight the date itself came to carry in medieval and early modern England specifically.

Michaelmas became one of England's traditional quarter days, the four dates spaced roughly three months apart that governed when rents fell due, when servants' contracts began and ended, and when university and legal terms opened, a purely practical civil function layered on top of the religious feast with no inherent connection to angels at all. Folk custom around the date accumulated its own detail over time, including the tradition of eating a goose at the Michaelmas meal and the widespread belief that blackberries should not be picked after this day, tied to a legend that Satan fell from heaven and landed in a bramble bush on the date, cursing the fruit as he went, a piece of folklore illustrating how far a fixed calendar date can travel from the feast that originally set it.