June 5, 2026, 5:01 a.m. ET National Donut Day is celebrated annually on the first Friday of June. The tradition began in 1938 to honor Salvation Army volunteers who served doughnuts to soldiers during World War I. Louisville is home to numerous local doughnut shops, each offering unique flavors and specialties. If you've got a sweet tooth, set your calendar. National Donut Day, which is June 5, may be known as the date to get freebies from chains such as Dunkin' and Krispy Kreme.