ST. LOUIS, MO (KTVI) - It's National Doughnut Day, which means you save some dough. Stop by Krispy Kreme today and get a free doughnut. You can choose from powdered, filled or an original glazed. No purchase is necessary. National Doughnut Day was established in 1938 by the Salvation Army to raise funds during the depression. It's observed every year on the first Friday in June.