International Mountain Day 2026
A UN day highlighting the importance of mountains for water, biodiversity and the people who live in them.
Next date
Friday, December 11, 2026
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Quick facts
- Date
- December 11
- Day of the week
- Friday in 2026
- Type
- International
- Observed in
- Global
- First observed
- 2003
- Established by
- United Nations General Assembly
- Led by
- FAO
- Hashtag
- #MountainsMatter
Overview
International Mountain Day, on December 11, celebrates mountains as sources of fresh water, biodiversity and culture, and draws attention to the challenges mountain communities face from climate change.
History
After 2002 was declared the International Year of Mountains, the UN General Assembly designated December 11 as International Mountain Day from 2003.
How to celebrate
1
Take a hike
Explore a hill or mountain trail responsibly.
2
Learn where your water comes from
Many rivers begin in mountain snow and glaciers.
Wishes and messages
Greeting card
Style
A 1080 × 1080 image, ready for WhatsApp, Facebook and Instagram.
Social media captions
Mountains matter. 🏔️ #MountainsMatter
International Mountain Day dates
| Year | Date | Day of the week | Days from today |
|---|---|---|---|
| 2026 | December 11 | Friday | 38 |
| 2027 | December 11 | Saturday | 403 |
| 2028 | December 11 | Monday | 769 |
| 2029 | December 11 | Tuesday | 1,134 |
| 2030 | December 11 | Wednesday | 1,499 |
| 2031 | December 11 | Thursday | 1,864 |
Frequently asked questions
When is International Mountain Day?
Every year on December 11.
Last updated November 2, 2026