 The spelling "donut" remained rare until the 1950s, and has since grown significantly in popularity; this growth in use has possibly been influenced by the spread of Dunkin' Donuts.National Doughnut Day, also known as National Donut Day, celebrated in the United States of America, is on the first Friday of June each year, succeeding the Doughnut Day event created by The Salvation Army in 1938 to honor those of their members who served doughnuts to soldiers during World War I.About 250 Salvation Army volunteers went to France.