Sunday, 13 September 2026
Promotes the study and protection of caves and karst landscapes, including their water resources and biodiversity.
Frequently asked questions
- When is International Day of Caves and Karst 2026?
- International Day of Caves and Karst 2026 is on Sunday, 13 September 2026.
- What day of the week is International Day of Caves and Karst 2026?
- It falls on Sunday.
- How is International Day of Caves and Karst calculated?
- This event is observed every year on 13 September.