World Environment Day 2027
More sustainability
sustainability topic
Return to the sustainability index for related events.
About the event
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.
Key figures
First held1974UN flagship day
Led byUN EnvironmentUNEP
Reach150+ countriesthemed each year
Coming years
2028
The organiser had not announced the 2028 edition as of 2026-09-03.