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What is World Environment Day?
World Environment Day is the United Nations' flagship environmental observance, held every June 5 since 1974. Led by the UN Environment Programme (UNEP), each year's edition is hosted by a different country and centres on a single global theme.
Why June 5?
June 5 was selected by the UN General Assembly (Resolution 2994 of December 15, 1972) to mark the opening day of the United Nations Conference on the Human Environment held in Stockholm from June 5–16, 1972. That conference produced the Stockholm Declaration — the first international document to recognise the environment as a global policy concern — and led to the creation of UNEP later the same year.
The first World Environment Day was observed on June 5, 1974, with the slogan Only One Earth.
Upcoming dates
World Environment Day falls on June 5 every year. The next five occurrences:
| Year | Date | Day of week |
|---|---|---|
| 2026 | June 5, 2026 | Friday |
| 2027 | June 5, 2027 | Saturday |
| 2028 | June 5, 2028 | Monday |
| 2029 | June 5, 2029 | Tuesday |
| 2030 | June 5, 2030 | Wednesday |
A short history
- 1972 — UN Conference on the Human Environment opens in Stockholm on June 5. The same year, UN General Assembly Resolution 2994 designates June 5 as World Environment Day, and UNEP is established.
- 1974 — First World Environment Day observed under the theme Only One Earth.
- 1987 — UNEP introduces the rotating host-country model, beginning with Kenya.
- 2018 — India hosts, theme Beat Plastic Pollution; over 100 countries run plastic-reduction campaigns.
- 2022 — Sweden hosts the 50th anniversary edition, returning to the original Only One Earth slogan and marking Stockholm+50.
- 2024 — Côte d'Ivoire hosts, theme Land Restoration, Desertification and Drought Resilience.
Recent themes and host countries
| Year | Host country | Theme |
|---|---|---|
| 2024 | Côte d'Ivoire | Land Restoration, Desertification and Drought Resilience |
| 2023 | Côte d'Ivoire / Netherlands | Solutions to Plastic Pollution |
| 2022 | Sweden | Only One Earth |
| 2021 | Pakistan | Ecosystem Restoration |
| 2020 | Colombia | Biodiversity |
| 2019 | China | Beat Air Pollution |
| 2018 | India | Beat Plastic Pollution |
Sources & references
- worldenvironmentday.global — UNEP's official campaign site.
- UN — World Environment Day.
- UN Environment Programme (UNEP) — the lead agency.
FAQs
Earth Day (April 22) is a grassroots civic campaign that began in the United States in 1970 and is now run by EarthDay.org. World Environment Day (June 5) is a formal UN observance, designated by the General Assembly in 1972 and led each year by the UN Environment Programme (UNEP). Different origins, different organisers, same broad mission.
The UN General Assembly chose June 5 to mark the opening day of the 1972 United Nations Conference on the Human Environment (the Stockholm Conference), which produced the Stockholm Declaration — the first major international document on environmental policy. The first World Environment Day was observed on June 5, 1974.
Each year UNEP selects a different host country. Recent hosts include the Republic of Korea (2025, marine pollution), Côte d'Ivoire (2024, land restoration), Sweden (2022, marking 50 years since Stockholm), India (2018) and China (2019). The current host and theme are announced at worldenvironmentday.global.
UNEP sets a single global theme each year, paired with a host country and a campaign hashtag. The 2024 theme was Land Restoration, Desertification and Drought Resilience. The 2023 theme was Solutions to Plastic Pollution. The current theme is published at worldenvironmentday.global.
No. World Environment Day is a UN observance, not a public holiday. Most countries mark it with public events, school programmes and government environmental announcements rather than a day off work.
World Environment Day is the broadest of the UN environmental observances and covers all environmental issues. World Oceans Day (June 8) focuses on marine ecosystems; World Wildlife Day (March 3) focuses on flora and fauna under CITES. World Environment Day acts as UNEP's flagship campaign day for the year.