Bitcoin Calendar
Celebrating Bitcoin's Historic Moments
Events in May 2025
10
May
First Lightning Network Transaction
The first lightning network transaction occurred on May 10, 2017, but it wasn't on the bitcoin blockchain - it was on Litecoin. This proof of concept paved the way for Lightning's implementation on Bitcoin.
8 years
1 BTC = $1,762.68
Saturday
22
May
Pizza Day
Celebrates the very first 'real world' purchase using bitcoin, where Laszlo Hanyecz bought two pizzas for 10,000 bitcoins. This transaction proved Bitcoin could function as a medium of exchange, not just a technological curiosity.
15 years
1 BTC = $0.04
Thursday
Hong₿ao
