May 22 is known as Bitcoin Pizza Day. This was the day that a guy, named Laszlo Hanyecz, announced on bitcointalk.org that he had successfully traded 10,000 bitcoin for pizza! Back then that was about $40.

In today's prices, that would be ~$610,000,000.

It was a milestone for bitcoin, in that it was the first known incident of someone trading bitcoin for a good or service. What a long way we have come!