39C3 Schedule

39C3 Schedule is your personal guide to the 39th Chaos Communication Congress, the annual four-day technology conference held in Hamburg from 27–30 December 2025. Organized by the Chaos Computer Club and volunteers since 1984, Congress brings together hackers, makers, and technologists to explore lectures, workshops, and hands-on events spanning information security, digital rights, creative technology, and society's relationship with innovation.

Navigate the full program with flexible viewing options. Browse sessions by day and room side by side, or switch to landscape mode on your smartphone for a custom grid layout optimized for tablets. Read complete session details including speaker names, start times, room locations, and relevant links. Use the search and filter tools to find talks matching your interests across hundreds of sessions.

Build your personal conference schedule with ease. Mark sessions as favorites and export your list to share with fellow attendees or keep offline. Set alarms for individual talks so you never miss a session, and add events directly to your device calendar. Receive automatic program updates as the schedule changes—configure update frequency in settings to stay informed without interruption.

Engage with the community during and after Congress. Vote on talks and workshops, leave comments to discuss content with other participants, and share session links with friends via web links that open directly in the app. Track which sessions you've already attended and discover talks you might have missed.

The app integrates with key Congress tools: c3nav for indoor navigation throughout the venue, Engelsystem for volunteers coordinating shifts and support, and Chaosflix for accessing recorded talks from past conferences. Open sessions from web links automatically, and sync your favorites across platforms.

Available in 17 languages including English, German, French, Spanish, Italian, Japanese, Polish, Portuguese, Dutch, Swedish, Finnish, Lithuanian, Russian, Danish, and Turkish—making Congress accessible to the global hacking community. Whether you're attending in person or following remotely, 39C3 Schedule keeps you connected to the program, the people, and the conversations shaping technology's future.