Donut lovers, you're in for a treat. On Friday, June 6, major donut companies like Dunkin' Donuts and Krispy Keme will be participating in National Doughnut Day, which means free doughnuts for everyone.

According to Philly.com, National Doughnut Day was created in 1938 in honor of the Doughnut Lassies who served doughnuts to soldiers during World War I.

To commemorate the holiday, Krispy Kreme will give away glazed doughnuts.

Likewise, Dunkin' Donuts locations will give away a doughnut along with the purchase of a beverage.

In addition to the free donuts, Dunkin's corporate parent is scheduled to ring the opening bell at the Nasdaq Stock Market.

Canton-based Dunkin' issued a press release stating that it is "serving guests a free donut of their choice (while supplies last) with the purchase of any beverage. The offer is good all day today at participating Dunkin' Donuts restaurants nationwide," reports the Boston Globe.

The chain, which has nearly 11,000 restaurants in 33 different countries, is using the holiday occasion to promote its new Blueberry Cobbler Donut. According to the chain, this doughnut includes blueberry filling, white dipping icing, and coffee cake streusel topping.

Tastykake is also running a contest on its Facebook page; comment on a Doughnut Day post and at 9 p.m. June 6, Tastykake will randomly select 100 winners to receive free doughnuts.

Doughnuts were first created by the Dutch, who were known to make "olykoek," which means oily cake. The Dutch doughnuts didn't have a hole and were fried in hot oil and the dough was sweet. However, in 1847, at the age of 16 Hanson Gregory claims to have created the holed-out doughnut using a pepper pot to punch out holes and to help his doughnuts cook more evenly.

Later on, New Yorker Adolph Levitt invented a doughnut machine in 1927, and by 1940, doughnuts were declared as the "Hit Food of the Century of Progress" by the World's Fair in Chicago, reports CNN.