Chicago St. Patrick's Day Parade in Chicago
Every year on the Saturday nearest March 17, downtown Chicago dyes the Chicago River bright green before the official Chicago St. Patrick's Day Parade marches down Columbus Drive. The river-dyeing tradition began in 1962 with the Chicago Journeymen Plumbers Union, and the parade itself has run since at least 1956, led every year by the Shannon Rovers Irish Pipe Band.
Its river ritual and parade scale make it a signature Chicago event.