Book your holiday, dog-ear your calendar, order a suitcase, check the bed exchange and wash your congress shirts: Between 27 and 30 December 2025, it will once again be time to join the Chaos Computer Club in organising, experiencing and celebrating Europe’s biggest and most relaxed hacker party, net culture party and tech conference. For this year’s edition, we will open Hamburgs Congress Center’s doors under the motto “39C3: Power cycles”, you can read the invitation on the CCC website for the proper pep talk:.

Get ready to join hundreds of like-minded …