Important dates
- Pre-registration starts June 1 2025
- Opening of Registration, Contributed Talk & Poster Submission September 1 2025
- IAU Travel Grant Submission Opening October 1 2025
- IAU Travel Grant Deadline December 31 2025
- Contributed Talk & Poster Abstract Submission Deadline January 15 2026
- Contributed Talk & Poster selection: Announcement February 15 2026
- Regular/Early-bird Fee Deadline (350 Euros) February 28 2026
- Late Registration Payment Closes (400 Euros) April 30 2026
- IAUS 405 at the Brno Observatory and Planetarium May 18 2026 – May 22 2026
- Deadline for submitting IAUS 405 proceeding contributions (preliminary) July 31 2026