What's your favorite donut? In honor of National Donut Day, post your favorite type of donut or donut shop in the stream below. Bonus! How to score a free doughnut on National Doughnut Day One of the most legit food holidays of the year, National Doughnut Day, is first Friday in June-- aka today, June 5th. The tradition dates back to 1938, when the Chicago Salvation Army decided to honor women who had served doughnuts, as well as supplies for letters like stamps and pens, and home-cooked meals, to soldiers during World War I.