These signature glazed doughnuts are shown in a 2007 photo. Observed on the first Friday every June, National Doughnut Day was originally celebrated by the Chicago Salvation Army in 1938 to honor women who served doughnuts to soldiers during World War I.
There are many different variation of doughnuts, but the confection is often sprinkled with sugar or other toppings, and may be frosted or glazed like these Krispy Kreme doughnuts. To help celebrate National Doughnut Day on June 4, 2010, select chains are offering free doughnuts.
Two young boys enjoy Krispy Kreme doughnuts while at the downtown Raleigh store's grand opening in Raleigh, N.C., on Oct. 28, 2009.
Doughnuts are commonly known to be circlular in shape, but some doughnuts, like this one from the Square Donut Shop in Terre Haute, Ind., come in a square shape. The logic behind their doughnuts is that being square maximizes the number of pastries that can fit on a preparation tray.
This police officer holds up a signature glazed Krispy Kreme doughnut while on shift in Newington, Conn. The first Friday of every June marks National Doughnut Day.
Two girls eat Krispy Kreme doughnuts at a store in Tokyo's Shinjuku district during a lunch break on Tuesday, March 27, 2007. To help celebrate National Doughnut Day on June 4, 2010, select chains are offering free doughnuts.
Burnitt Bealle enjoys a doughnut at a Krispy Kreme store in Winston-Salem, N.C., Tuesday Jan. 18, 2005. Observed on the first Friday in June, National Doughnut Day was originally celebrated by the Chicago Salvation Army in 1938 to honor women who served donuts to soldiers during World War I.
A box of dozen assorted delectable glazed Krispy Kreme Doughnuts are in display. To help celebrate National Doughnut Day on June 4, 2010, select chains are offering free treats.
Ten-year-old Tyler Holt of Raleigh, N.C., eats a Krispy Kreme doughnut on Friday, May 7, 2004, at a Krispy Kreme store in Raleigh, N.C.
Freshly iced doughnuts roll by on a conveyor belt at the Krispy Kreme store in Winston-Salem, N.C., the town where Krispy Kreme was born, on Jan. 14, 2005.