Friday, June 1, is National Doughnut Day, and a few chains are offering deals. In Maryland, people are most likely to choose doughnuts from their neighborhood doughnut shops rather than a chain like Dunkin' Donuts or Krispy Kreme, according to a survey. Although folks did swamp Duck Donuts when it opened locations in Rockville and Gaithersburg in the last year.

You may have other ideas. The offers.com survey sample size was small — 1,000 consumers answered a Google Survey asking them about their favorite types of doughnuts and which chains are their favorites. Classic glazed doughnuts are Americans' favorites, according to survey, which showed the lightly frosted doughnuts to be the top choice of 48 percent of respondents. Coming in a distant second were Boston cream doughnuts (17 percent), followed by jelly doughnuts (12 percent), doughnuts with sprinkles (7 percent), powdered doughnuts (6 percent) and twist doughnuts (6 percent).

(For more news like this, find your local Patch here. If you have an iPhone, click here to get the free Patch iPhone app; download the free Patch Android app here. And like Patch on Facebook!) National Doughnut Day dates back to 1938, when The Salvation Army of Chicago created it to honor the "Doughnut Girls" who served doughnuts to soldiers in World War I. The unofficial holiday is celebrated every year on the first Friday in June.

Though the honorary salute to the "Doughnut Girls" wouldn't begin until years later, two Salvation Army volunteers — Ensign Margaret Sheldon and Adjutant Helen Purviance — came up with the idea of frying doughnuts in soldiers' helmets after they and about 250 others were deployed to France to provide spiritual and emotional support for U.S. soldiers. "These tasty treats boosted morale and won the hearts of many soldiers," The Salvation Army's Metropolitan Division in Chicago said on its website.

Also known as the "Doughnut Lassies," these volunteers are credited with popularizing the doughnut in the United States when troops, who were known as "doughboys," returned home from the war. The tradition, which provided a link to home and family, continued in World War II.

If you're looking for some great deals on doughnuts, here are some in Maryland:

Duck Donuts locations, found primarily on the East Coast, but also in the Midwest, California and Texas, will offer each customer a free bare, cinnamon sugar or powdered sugar doughnut on June 1. In Maryland the chain has shops at: 1327 Rockville Pike, Rockville; Firstfield Shopping Center, 511 Quince Orchard Road in Gaithersburg; and 5272 Campbell Blvd D, in Nottingham. Dunkin' Donuts, which has more than 7,600 locations nationwide, is offering a free classic doughnut — including favorites like Boston Kreme, glazed and Strawberry Frosted with Sprinkles — with the purchase of any beverage on June 1.