From 27. to 30.12.2025 there is the 39th “Chaos Communication Congress” aka 39C3 in Hamburg/Germany.
Anyone interested in a meetup?
https://events.ccc.de/congress/2025/infos/startpage.html
If you cannot attend have a look at
https://media.ccc.de or https://streaming.media.ccc.de for live streams !
Cheers,