Legend has it that St. George was St. Michael's earthly representative, so in some parts of Britain a pastry dragon is made to mark the day. We make ours from sweet piecrust and apples. I make a regular-looking apple pie, with the oldest daughter stirring the filling thrice round while asking a blessing upon the household, and I then "sculpt" a dragon from piecrust onto the top of the pie, the more ferocious-looking the better! Bake til fiery hot, as dragons ought to be, and then slay the dragon with a pastry knife to the tummy. Good fun! The kids look forward to it all year.
Also the traditional day to settle accounts, rents, and move into a new home. Goose is the traditional food of the day (but we don't care for goose). Michaelmas daisy is the flower for the day.