Carb Day All Day Tie Dye Tee

Carburetion Day--or Carb Day--is the final day of practice for the Indy 500. The name originally referred to teams using the practice time to tune their carburetors and the moniker has stuck long after carburetors stopped being used on race cars.

Around central Indiana, Carb Day has become a yearly tradition for many race fans who skip work and get the greatest weekend in racing started off right.