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National Deep Dish Pizza Day celebrates the Chicago delicacy's spread

National Deep Dish Pizza Day, marked annually on April 5, celebrates the day the first deep dish pizzeria opened outside of Chicago in 1979. Photo by caribb/Flickr
National Deep Dish Pizza Day, marked annually on April 5, celebrates the day the first deep dish pizzeria opened outside of Chicago in 1979. Photo by caribb/Flickr

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April 5 (UPI) -- National Deep Dish Pizza Day, celebrated annually on April 5, began in 1979 to mark the date the Chicago delicacy moved beyond the Windy City.

The holiday celebrates Chicago-style deep dish pizza, which was brought to the United States in 1943 by Chicago-based Pizzeria Uno, known today as Uno Pizzeria & Grill.

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National Deep Dish Pizza Day is celebrated April 5, the date that Uno opened its first non-Chicago location in Boston in 1979.

Other holidays and observances for April 5 include National Caramel Day, National Flash Drive Day, First Contact Day (Star Trek), Bell Bottoms Day, National Dandelion Day and National Raisin and Spice Bar Day.

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