Originating as a series of minor riots, it spread due to men wearing straw hats past the unofficial date that was deemed socially acceptable, September 15.
Initially it was not considered good form for men to wear these in big cities even at the height of summer (women's hats were different).
[3] This tradition became well established, and newspapers of the day would often warn people of the impending approach of the fifteenth, when men would have to switch to felt or silk hats.
[4] Hat bashing was only socially acceptable after September 15, but there were multiple occasions leading up to this date where the police had to intervene and stop teenagers.
[2] The riot itself began on September 13, 1922, two days before the supposed unspoken date, when a group of youths decided to get an early jump on the tradition.
The longest recorded time one of the teens was sent to jail was three days served by an "A. Silverman", who was sentenced by Magistrate Peter A. Hatting during night court.
By the 1950s the classic straw boater was virtually extinct as a garment, except in specialized circumstances such as the uniform of certain English public schools or university and college sportswear.