Fun Fact: August 23 is National Sponge Cake Day in the United States—a day dedicated to enjoying this light, fluffy dessert, with a tradition dating back centuries. Cakes have a special place in celebrations and happiness worldwide, so why not bake or buy one in honor?by johnataylor on TwosFun Fact: August 23 is National Sponge Cake Day in the United States—a day dedicated to enjoying this light, fluffy dessert, with a tradition dating back centuries. Cakes have a special place in celebrations and happiness worldwide, so why not bake or buy one in honor?