Bitcoin Pizza Day is celebrated every year on May 22 to commemorate the first documented commercial transaction in Bitcoin. On May 22, 2010, Laszlo Hanyecz, a programmer, paid 10,000 BTC for two pizzas worth approximately 41 dollars, demonstrating that Bitcoin could be used as real currency. Today, that value would be equivalent to millions of dollars, making the symbolic purchase one of the most famous events in the history of cryptocurrencies. Bitcoin Pizza Day is celebrated by the community as a historic moment that marks the beginning of the practical use of BTC, with events, memes, and reflections on its value.