International Mountain Day
A/RES/57/245
A/RES/57/245
This authority record treats the observance as a fixed annual date. The same month and day can be reused unless a stronger source changes the rule. Public-holiday or government status is never inferred from the observance name alone.
Overview
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 it 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
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 is assembled only from verified provenance fields. Missing stages are omitted rather than inferred.
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
Verified institutional roles and milestones are shown first. Fields that the reviewed sources do not establish remain fail-closed and are available below without competing with the confirmed record.
4 fields not established in reviewed sources
Ways to observe
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.
Useful 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.
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
Repeated links from the authority record, institutional provenance and editorial guide research are consolidated here. Badges show how each source is used; a contextual source is never treated as proof of establishment on its own.
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 use reviewed distinctions and related authority records to understand where this observance fits.
Frequently asked questions
When is International Mountain Day?
11 December The stored recurrence guidance is: 11 December.
Does International Mountain Day fall on the same date every year?
The authority record classifies it as fixed annual, so its month and day are reusable unless stronger evidence changes the rule.
Is International Mountain Day an official public holiday?
The authority record verifies 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 the supporting authority record explicitly does so.
Who established or recognizes International Mountain Day?
The reviewed provenance layer identifies 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 record has international or global institutional scope: 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 layer is source-backed and keeps its date rule, scope, provenance and editorial guardrails attached to the authority record. This record 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 records also resolve to December 11, 2026 under the current authority data.
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.
National Noodle Ring Day
Two Association of Nutrition & Foodservice Professionals chapter calendars from different publication years list National Noodle Ring Day on 11 December.
National Salesperson Day
Mercy University’s career-development material states that National Salesperson Day is observed on the second Friday in December; current National Day Calendar material uses the same rule.
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…