It is indeed a historical event but I think it would be more fun if there's an event for us to enjoy or have fun which I think the best way to celebrate the event. I think a baking contest or an art contest about the event. Well, it's up to anyone to start a contest but since I am not a merit source then I wouldn't have enough smerit to reward those who want to participate in the contest. Anyway, happy bitcoin pizza day to everyone and also this makes me want to eat pizza 
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Pizza day was a very much fun for everyone in the forum in the past three years although I have participated once only. I believe Laszlo Hanyecz will be surprised of the 10 BTC used to buy one Pizza at that time. We are still waiting for any information from the organizer to make the pizza day fun for Laszlo Hanyecz to console the bitcoin he used to buy the one Pizza. The baking contest would be the best than the art contest. Some user will learn how to bake pizza through this mean. .