The Michaelmas Festival will be held in early October 2021. The date should be set by Tuesday, August 24, 2021.
Michaelmas is not directly based on cosmic alignment, in that it is traditionally celebrated on the fixed date of the feast of st Michael, September 29. However, similar to Christmas, St. John and Easter, it is in “essential” alignment with one of the cardinal points in the yearly cycle, in this case the autumn equinox. This year the fall equinox will be exact September 22 at 3:21 PM EDT.