World Environment Day, celebrated on June 5 each year, was established in 1972 during the United Nations Conference on the Human Environment in Stockholm. Later that year, June 5 was officially designated by the UN General Assembly as Environment Day. The first celebration took place in 1973, with the theme “Only One Earth.”
Since then, it has grown into a global movement, with a different host country and theme each year, spotlighting urgent environmental issues.