World Environment Day
- When5 June 2027
About World Environment Day
World Environment Day is the United Nations' flagship day for encouraging worldwide awareness and action for the environment. Led by the UN Environment Programme since 1974, it is marked in more than 150 countries and each year is hosted by a different nation around a set theme.
The next World Environment Day is marked on 5 June, with a global host country and theme set by UN Environment. Governments, businesses and communities run campaigns and projects to tackle pressing environmental issues.
First held1974UN flagship day
Date5 Juneannual observance
Led byUN EnvironmentUNEP
Reach150+ countriesthemed each year
How to take part
Use the day for a concrete environmental action:
- Choose a local issue to focus on: waste, water, air, biodiversity, food, transport or energy.
- Take part in a community activity, workplace initiative or school action if one is available.
- Share a practical environmental step that people can repeat after the day.
- Keep claims specific and sourced; do not turn the day into generic green messaging.