If you are looking for an excuse to indulge in a donut or two, here is a perfect one. Friday, June 5, 2020, is National Donut Day, which means it is your civic duty to devour one — or even a dozen — of the fried treats. Observed annually on the first Friday of June, the yummy holiday was not established by donut manufacturers to boost sales but by Salvation Army volunteers to raise funds for the poor.