International Mountain Day2026 · Date · History · Messages · Quotes
A/RES/57/245
About International Mountain Day
International Mountain Day is observed on 11 December to raise awareness of the importance of mountains, the opportunities and challenges of sustainable mountain development, and the well-being of mountain peoples and environments.
Mountains connect ecological and human systems: water, biodiversity, food and livelihoods can all depend on mountain landscapes. The day therefore sits at the intersection of environment, rural development, culture and resilience.
Why International Mountain Day matters
Sustainable mountain development should include the people who live and work in mountain areas. Indigenous Peoples and local communities may hold important place-based knowledge, but that knowledge should not be treated as a free resource to extract without consent or context.
Responsible activities also recognize that recreation, tourism, infrastructure and climate pressures can affect fragile high-altitude environments and local livelihoods.
History of International Mountain Day
The UN General Assembly designated 11 December as International Mountain Day, and the observance has been marked annually since 2003.
The Food and Agriculture Organization of the United Nations is the coordinating agency for the global observance through its mountain work and the Mountain Partnership Secretariat.
UN General Assembly resolution A/RES/57/245, adopted on 20 December 2002, designated 11 December as International Mountain Day beginning in 2003.
How the observance developed
This timeline uses documented milestones from reviewed sources. Missing stages are left out rather than guessed.
United Nations General Assembly
UN General Assembly resolution A/RES/57/245
First documented observance
A/RES/57/245 designated 11 December as International Mountain Day beginning in 2003, and FAO records annual observance since then.
Food and Agriculture Organization of the United Nations (FAO)
The Food and Agriculture Organization of the United Nations is the coordinating agency for the global observance.
What the evidence establishes
Confirmed institutional roles and milestones are shown first. Details that could not be established from the reviewed sources are listed separately below.
4 fields not established in reviewed sources
How to Observe International Mountain Day
Learn where your water, food or energy systems depend on mountain watersheds or landscapes.
Support a mountain conservation or community organization that works with local residents and clearly explains how projects are governed.
When hiking or visiting mountain areas, follow local access, waste, wildlife and fire guidance rather than assuming one set of outdoor rules applies everywhere.
Explore food, craft, pastoral or cultural traditions through community-approved sources and avoid presenting one mountain culture as representative of all mountain peoples.
Discuss how tourism and infrastructure can create both opportunities and pressures for mountain communities.
International Mountain Day Facts
International Mountain Day is observed on 11 December.
The global observance has been held annually since 2003.
FAO is the coordinating UN agency for International Mountain Day.
The day links mountain ecosystems with sustainable development and the lives of mountain communities.
Annual campaign themes can change and should not be treated as permanent facts.
Establishing instrument: UN General Assembly resolution A/RES/57/245.
The establishing decision was adopted on 20 December 2002.
International Mountain Day Messages
May International Mountain Day inspire curiosity about the living world and thoughtful action to protect it.
Celebrate International Mountain Day by learning from credible conservation sources and choosing one practical way to reduce harm or support protection.
Wishing everyone marking International Mountain Day a day of discovery, respect for nature and care that continues beyond today.
On International Mountain Day, may appreciation for the natural world lead to informed stewardship and practical care for the places and species around us.
International Mountain Day Quotes
“Mountains are the world’s water towers.”
Topic and context
What this page does not assume
- Keep the source-defined country, community, organizer or institutional scope; do not silently broaden it.
- Do not treat the title alone as proof of government recognition or public-holiday status.
- Do not add a creator, founding story or origin claim unless the supporting evidence establishes it.
Evidence & sources
Sources used across the guide are gathered here. Labels show how each source supports the page, and contextual references are kept separate from primary evidence.
Food and Agriculture Organization — International Mountain Day (opens in a new tab)
United Nations Digital Library — A/RES/57/245, International Year of Mountains, 2002 (opens in a new tab)
un.org — authoritative source (opens in a new tab)
Understand it, compare it, then explore further
Start with the most common factual questions, then compare closely related observances and explore useful connections.
Frequently asked questions
When is International Mountain Day?
11 December The documented recurrence rule is: 11 December.
Does International Mountain Day fall on the same date every year?
Yes. It uses a fixed annual date unless stronger evidence changes the pattern.
Is International Mountain Day an official public holiday?
The reviewed sources verify it within this scope: United Nations international observance. That recognition does not by itself make it a statutory public holiday; the site only makes public-holiday claims when reliable evidence explicitly does so.
Who established or recognizes International Mountain Day?
The reviewed sources identify United Nations General Assembly as the proclaiming or establishing body. Current facilitation or coordination is recorded as Food and Agriculture Organization of the United Nations (FAO).
Is International Mountain Day international or country-specific?
The documented scope is international or global: United Nations international observance. That does not mean every country treats the date as a public holiday or observes it in the same way.
How is this page verified?
The factual information is checked against reviewed sources, including the date pattern, scope and institutional history. This page was checked on 2026-09-05.
When is International Mountain Day?
It is observed every year on 11 December.
Who coordinates International Mountain Day?
The Food and Agriculture Organization of the United Nations coordinates the global observance.
Is the day only about mountain conservation?
No. Conservation is important, but the observance also addresses sustainable development, livelihoods, communities and the relationships between mountain environments and people.
Other observances on December 11
These observances are also listed on December 11, 2026.
Anniversary of the Statute of Westminster
Canadian Heritage states that the anniversary of the Statute of Westminster is celebrated each year on December 11 and describes the associated federal flag protocol.
Proclamation of the Republic of Upper Volta / 11 December national-day context
The Presidency of Burkina Faso states that the Republic of Upper Volta was proclaimed on 11 December 1958. Current government sources call 11 December the national celebration and frame it…
UNICEF founding anniversary
UNICEF states that the United Nations established UNICEF on 11 December 1946; the date supports a founding-anniversary page rather than a formal UN “UNICEF Birthday” observance.