World Cleanup Day
A/RES/78/122
A/RES/78/122
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 Cleanup Day is observed on 20 September. The United Nations General Assembly proclaimed the day in resolution A/RES/78/122 in 2023, and UN-Habitat facilitates the observance.
The day recognizes clean-up efforts as part of a broader approach to sustainable waste and resource management. A one-day litter collection can be useful, but it should not be presented as a substitute for waste prevention, reliable collection systems, recycling, producer responsibility or long-term public policy.
Why it matters
Clean-up activities can make public spaces safer and more usable while helping communities see where waste accumulates and which materials repeatedly escape collection or recovery systems.
The observance is strongest when visible clean-up work is connected to upstream questions: how waste is generated, how materials are designed and sold, whether collection systems reach everyone, and how local institutions can prevent litter and dumping from recurring.
History
The movement behind World Cleanup Day traces its modern origin to Estonia on 3 May 2008, when more than 50,000 people joined a nationwide cleanup. Let’s Do It World describes that event as the birth of a global bottom-up civic movement.
Preparations for a single coordinated World Cleanup Day began in 2014, and the first global edition was held on 15 September 2018 with participation across 157 countries and territories.
On 9 June 2023, the second United Nations Habitat Assembly adopted resolution 2/3 and recommended that the General Assembly proclaim World Cleanup Day.
On 8 December 2023, the General Assembly adopted A/RES/78/122 and proclaimed 20 September as World Cleanup Day. UN-Habitat identifies 20 September 2024 as the inaugural United Nations observance.
How the observance developed
This timeline is assembled only from verified provenance fields. Missing stages are omitted rather than inferred.
Let’s Do It! Estonia national cleanup
The one-day nationwide cleanup in Estonia became the catalyst for the Let’s Do It civic movement that later developed the coordinated World Cleanup Day model.
Community-led World Cleanup Day
The global movement was already running same-name World Cleanup Day editions when the United Nations General Assembly proclaimed an annual UN World Cleanup Day on 20 September in 2023, with the first UN observance in 2024.
Estonia, introducing the General Assembly draft on behalf of its multi-State sponsor group
UN Meetings Coverage records Estonia introducing draft A/78/L.11 in plenary on behalf of its sponsors.
United Nations General Assembly
UN General Assembly resolution A/RES/78/122
First documented observance
UN-Habitat identifies the 2024 event as the inaugural World Cleanup Day under the UN observance.
United Nations Human Settlements Programme (UN-Habitat)
A/RES/78/122 and UN-Habitat observance material identify UN-Habitat as the facilitator of the Day.
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.
3 fields not established in reviewed sources
Predecessor and precursor observances
Earlier or merged observances are kept separate from former names and later institutional actions.
Ways to observe
Organize a cleanup only with permission, suitable gloves and collection equipment, and a clear plan for sorting and lawful disposal. Do not ask volunteers to handle sharps, chemicals or other hazardous waste without trained services.
Record the types and locations of recurring litter so the activity produces information that can guide prevention rather than only a bag count.
Pair a cleanup with a short audit of bins, collection routes, recycling access, refill options or local dumping hotspots and identify one fix that can last beyond the event.
Work with local authorities, schools, businesses or resident groups so collected material enters a legitimate waste-management stream instead of being moved from one unmanaged location to another.
Useful facts
World Cleanup Day is a United Nations observance on 20 September.
The movement traces its modern catalyst to a nationwide Estonia cleanup on 3 May 2008.
The first coordinated global World Cleanup Day was held on 15 September 2018.
The General Assembly established the UN observance through A/RES/78/122 on 8 December 2023.
UN-Habitat facilitates the observance, and the inaugural United Nations World Cleanup Day was held on 20 September 2024.
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.
UN-Habitat — Resolution 2/3: World Cleanup Day (opens in a new tab)
United Nations Digital Library — A/RES/78/122 (opens in a new tab)
United Nations Meetings Coverage — A/78/L.11 introduction and Assembly action (opens in a new tab)
United Nations — World Cleanup Day (opens in a new tab)
Let’s Do It World / World Cleanup Day — movement timeline and history (opens in a new tab)
UN-Habitat — World Cleanup Day 2024 (opens in a new tab)
United Nations — List of International Days and Weeks (opens in a new tab)
United Nations — Observances: who chooses them and how (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 World Cleanup Day?
20 September The stored recurrence guidance is: 20 September.
Does World Cleanup 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 World Cleanup 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 World Cleanup Day?
The reviewed provenance layer identifies United Nations General Assembly as the proclaiming or establishing body. The proposer or originator is recorded separately as Estonia, introducing the General Assembly draft on behalf of its multi-State sponsor group. Current facilitation or coordination is recorded as United Nations Human Settlements Programme (UN-Habitat).
Is World Cleanup 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.
Is World Cleanup Day an official United Nations observance?
Yes. The UN General Assembly proclaimed 20 September as World Cleanup Day through resolution A/RES/78/122, adopted on 8 December 2023.
Who facilitates World Cleanup Day?
The establishing resolution asks the United Nations Human Settlements Programme, UN-Habitat, to facilitate the observance.
Why is World Cleanup Day on 20 September?
The resolution establishes 20 September, but the reviewed first-party sources do not provide a sufficiently explicit historical explanation for why that exact date was selected. The guide therefore does not infer one.
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