However you choose to observe Michaelmas, the feast of St. Michael and All Angels Sept. 29, the Norbertine priests of St. Michael's Abbey will possibly be enjoying it more. Their new Church of Our Lady of the Assumption in Silverado, California, completed in June 2021 along with a new abbey built 10 miles away from an area prone to landslides, has a special stained-glass window at the back of the nave.