How is International Day of Caves and Karst calculated?

This event is observed every year on 13 September.

When is International Day of Caves and Karst 2804?

Name: International Day of Caves and Karst
Start: 2804-09-13
End: 2804-09-13
Location: Worldwide

Promotes the study and protection of caves and karst landscapes, including their water resources and biodiversity.

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When is International Day of Caves and Karst 2804?: International Day of Caves and Karst 2804 is on Monday, 13 September 2804.
What day of the week is International Day of Caves and Karst 2804?: It falls on Monday.
How is International Day of Caves and Karst calculated?: This event is observed every year on 13 September.