In Indiana, the first day that banners and signs related to a nationally recognized sporting event to be held in Indiana can be displayed is 21 days prior to the event.  (IC 7.1-5-2-7 & Rule 1-38-1)   This year for the May races at the Indianapolis Motor Speedway, that date is April 20, 2019, which is 21 days prior to the Grand Prix of Indianapolis.  The banners will need to be removed five days after the close of the Indianapolis 500 on May 31, 2019.  

Watch this video to learn more about permitted dates for businesses to display banners related to sporting events in Indiana.