Note the shadows cast on the racing surface. The first day of practice is traditionally referred to as "Opening Day. The day is usually marked with festivities and for many years was popularly attended. In some years when May 1 fell mid-week, or if weather interfered, the activity would be light and the formal ceremonies would be held on the first Saturday of the month. Since , the "Opening Day" practice session has been scheduled either three weeks or two weeks prior to race day. The battle to be the First Driver on the Track for the month was a spectacle of Opening Day for many years.