The word is on the street: the Chaos Computer Club is hosting 40C3 from 27 to 30 December 2026 – Europe’s biggest hacker party, conference and platform for technology, society and civil liberties. We understand the Congress to be a huge shared stage and therefore invite you to help shape it. The Call for Participation for talks, the entertainment programme, art, punk and music opens today. Everything is getting bigger, more colourful and more beautiful. Following our moving to the Hamburg Exhibition halls, there is once again plenty of space for creative ideas. Obviously, we want to make the most of this new space, which is why we are inviting all galactic beings to the 40th Chaos Communication Congress from 27 to 30 December 2026.