World Day for Glaciers
A/RES/77/158
A/RES/77/158
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
World Day for Glaciers is observed on 21 March. The United Nations General Assembly proclaimed the observance through resolution A/RES/77/158, with annual observance beginning in 2025.
The day raises awareness of glaciers, snow and ice, their role in freshwater and climate systems, and the consequences of glacier loss. It should not be confused with World Water Day on 22 March, although the subjects are closely connected.
Why it matters
Glaciers store and release freshwater, influence river systems and sea level, and provide evidence of changing climate conditions. Their importance differs by region and watershed, so local impacts should be described with appropriate geographic evidence.
Public-facing material should distinguish observed glacier change from projections and should cite scientific institutions for quantitative climate claims.
History
In December 2022, the UN General Assembly adopted resolution A/RES/77/158, declaring 2025 the International Year of Glaciers’ Preservation and proclaiming 21 March of each year as World Day for Glaciers beginning in 2025.
UNESCO and the World Meteorological Organization have major implementation roles in glacier-preservation and cryosphere-awareness efforts, including work connected to the International Year and subsequent cryosphere initiatives.
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/77/158
First documented observance
A/RES/77/158 proclaimed 21 March as World Day for Glaciers beginning in 2025.
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.
5 fields not established in reviewed sources
Ways to observe
Use glacier monitoring data or repeat photography from a scientific institution to study change over time.
Map which communities or river systems depend on seasonal snow and glacier melt, using region-specific sources.
Discuss how glacier change can affect water supply, hazards, ecosystems and sea level without treating all regions as identical.
Visit a museum, science centre or geological resource that explains the cryosphere and glacier formation.
Avoid unsafe glacier travel or field activities without qualified local guidance and appropriate equipment.
Useful facts
World Day for Glaciers is observed on 21 March.
The UN General Assembly proclaimed the day through resolution A/RES/77/158.
Annual observance began in 2025.
The same resolution declared 2025 the International Year of Glaciers’ Preservation.
The reviewed source does not establish why 21 March itself was selected.
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.
UNESCO — World Day for Glaciers (opens in a new tab)
United Nations Digital Library — A/RES/77/158 action note 14 December 2022 (opens in a new tab)
United Nations — World Day for Glaciers (opens in a new tab)
Dedicated Authoritative Page
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 World Day for Glaciers?
21 March The stored recurrence guidance is: 21 March.
Does World Day for Glaciers 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 World Day for Glaciers 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 World Day for Glaciers?
The reviewed provenance layer identifies United Nations General Assembly as the proclaiming or establishing body.
Is World Day for Glaciers 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 2026-09-07.
When did World Day for Glaciers begin?
The UN General Assembly proclaimed the observance through resolution A/RES/77/158, with annual observance beginning in 2025.
Is World Day for Glaciers the same as World Water Day?
No. World Day for Glaciers on 21 March focuses specifically on glaciers and the cryosphere, while World Water Day on 22 March addresses freshwater and water-related challenges more broadly.
Why does this guide not explain why 21 March was chosen?
The reviewed UN and UNESCO material establishes the date and institutional history but does not provide a sufficiently clear reason for selecting 21 March, so this guide does not infer one.
How this differs from closely related observances
These distinctions are separately reviewed and source-backed. They clarify scope; they do not change either authority record.
Is World Day for Glaciers the same as World Water Day?
World Day for Glaciers on 21 March focuses specifically on glaciers, snow, ice and the cryosphere. World Water Day on 22 March covers freshwater and water-related challenges more broadly.
Open World Water Day →Distinction sources
Other observances on March 21
These records also resolve to March 21, 2027 under the current authority data.
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The South African Government’s public-holidays page lists Human Rights Day on 21 March.
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Australia’s Department of Foreign Affairs and Trade current National Days protocol register lists Namibia — Independence Day on 21 March. The source verifies the diplomatic national-day ide…
International Colour Day
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A/RES/2142 (XXI)