How is International Mountain Day calculated?

This event is observed every year on 11 December.

When is International Mountain Day 2026?

Name: International Mountain Day
Start: 2026-12-11
End: 2026-12-11
Location: Worldwide

International Mountain Day raises awareness of the importance of mountains and sustainable mountain development.

Download an iCalendar file for International Mountain Day and add it to your calendar app.

When is International Mountain Day 2026?: International Mountain Day 2026 is on Friday, 11 December 2026.
What day of the week is International Mountain Day 2026?: It falls on Friday.
How is International Mountain Day calculated?: This event is observed every year on 11 December.