This free event has ended, but find upcoming FreebiEvents here. Celebrate National Doughnut Day at Krispy Kreme on Friday, June 5 and get a free doughnut of any variety. Offer is void in CT. National Doughnut Day commemorates The Salvation Army volunteers who provided doughnuts to soldiers in WWI and is observed every year on the first Friday of June. Offer is valid at participating locations in the US and Canada. No purchase necessary.