National Cuban Sandwich Day and National Spongecake Day in USA
National Cuban Sandwich Day and National Spongecake Day in USA is held on August 23. This event in the third decade of the month August is annual. 
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While an early cousin of the Cuban sandwich was born in Cuba proper, the Cuban sandwich as we know it today originated in Tampa, Florida's cigar-producing neighborhood of Ybor City in the late 1800s and caught on by the early 1900s. It was popular among workers in the district's many cigar factories.
Sponge cake is a cake made of flour (usually wheat flour), sugar, and eggs. The Victoria sponge cake was named after Queen Victoria, who ate a slice of sponge cake with her afternoon tea. It is usually called simply sponge cake. In actuality, the sponge cake can be traced back to roughly the 15th Century. The term 'sponge cake' comes from the sponge-like openness of the crumb.
Similar holidays and events, festivals and interesting facts
National Pecan Torte Day and National “Eat a Peach” Day in USA on August 22
National Coffee Day in Peru on August 23 (Held on the fourth Friday of August);
Loquat Day in Chile on August 23
National Buttered Corn Day in the USA on August 23
Hessian Blues-, Schmus- & Applesauce Festival in Laubach on August 23
National Waffle Day and National Peach Pie Day in United States on August 24
National Whiskey Sour Day and National Banana Split Day in USA on August 25