The Straw Hat Riot of 1922 was a riot that occurred in New York City at the end of summer as a result of unwritten rules in men's fashions at the time, and a tradition of taunting people who had failed to stop wearing straw hats after autumn began. Originating as a series of minor riots, it spread due to youths choosing to harass men wearing straw hats past the unofficial date that was deemed socially acceptable, September 15. It lasted eight days, leading to many arrests and some injuries.