National Cream-Filled Doughnut Day and Eat a Hoagie Day in USA
National Cream-Filled Doughnut Day and Eat a Hoagie Day in USA is held on September 14. This event in the second decade of the month September is annual. 
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Donuts came to the United States in the mid-1800s through Dutch settlers that were known for their pastries. The first donut with a hole in the middle is said to be a creation of American Hansen Gregory. Thankfully, someone after Hansen made the brilliant decision to fill that hole with delicious cream filling!
Hoagies, a type of sub sandwich, is believed to have started in South Philadelphia. The name likely comes from the Philadelphia area where, during World War I, Italian immigrants who worked at the Hog Island shipyard began making sandwiches; they were originally called “hoggies” before the name hoagie took hold. Hoagies owe their name to the Hog Island shipyard on the Deleware River when during the depression, Italian-American workers would purchase Italian sandwiches from Al Depalma, a luncheon that called these sandwiches “hoggies”.
Similar holidays and events, festivals and interesting facts
National or International Chocolate Day on September 13 (United States, the U.S. National Confectioners Association);
National Cachaça Day in Brazil on September 13
National Peanut Day in USA on September 13
National Double Cheeseburger, National Creme de Menthe Day and National Linguini Day in USA on September 15
National Cheese Toast Day in USA on September 15
National Guacamole Day, National Cinnamon-Raisin Bread Day and National Play-Dough Day in United States on September 16
National Apple Dumpling Day and National Monte Cristo Sandwich Day in USA on September 17
International Guinep Day on September 17