Celebrated on September 20th
Pizza Hut became the first restaurant to deliver a pizza to space when it rocketed a pizza to astronaut Yuri Usachov at the International Space Station. The pizza was topped with extra spices (since tastebuds are dulled in space) and salami, so it wouldn't mold.
Pepperoni is America's favorite topping (66%) The other top 3 toppings are sausage (59%), mushrooms (53%) and bacon (51%)
The Super Bowl is number one pizza day in the US, followed by Halloween, the day before Thanksgiving, New Year’s Eve, and New Year’s Day.