World Environment Day (WED) is celebrated every year on 5 June to raise global awareness to take positive environmental action to protect nature and the planet Earth. It is run by the United Nations Environment Programme (UNEP).
It was established by the United Nations General Assembly in 1972 on the day that United Nations Conference on the Human Environment began. The first World Environment Day was celebrated in 1973. Since then it is hosted every year by a different city with a different theme.