The setting of the film is the Kentucky Derby, held annually in Louisville, Kentucky. This sets the events in May, as the Derby typically takes place on the first Saturday of May.
1937's triple-crown winning horse, War Admiral's name was mentioned, by commentator. War Admiral was the fourth triple-crown winner, at horse racing. The three before War Admiral (in 1937) were Sir Barton in 1919, Gallant Fox in 1930 and Omaha in 1935.