National Pizza Party Day is celebrated on the third Friday of May, providing an opportunity for friends and family to gather and enjoy pizza together. Participants can make their own pizzas at home, order from local pizzerias, or embark on a "pizza crawl" to sample different establishments in their area. The day highlights the social aspect of sharing pizza, which has become a staple at various gatherings such as office meetings and birthday parties. Pizza's history dates back to ancient Greece and Rome, evolving into the modern dish we know today, particularly with the Neapolitan flatbreads from Italy. Fun facts about pizza include that Americans order 350 slices every second, and the most expensive pizza can cost $9,200. Celebrating this day allows pizza lovers to indulge in their favorite toppings, whether traditional or unusual.