Besides World Environment Day, what day is June 5th?

June 5th is the156th day of the Gregorian calendar year, the157th day of the leap year, and there are 209 days before the end of the year. The major event was that the United Nations General Assembly designated June 5th as World Environment Day in 1972. World Environment Day reflects people's understanding and attitude towards environmental issues all over the world, and expresses human's yearning and pursuit for a beautiful environment. It is also one of the main media for the United Nations to promote global environmental awareness, pay more attention to environmental issues and take action. The significance of World Environment Day is to remind the world of the harm of the earth and human activities to the environment, and to carry out various activities on this day to emphasize the importance of environmental protection. On June 5th every year, the United Nations Environment Programme selects a member country to hold a commemorative event of "World Environment Day", publishes an annual report on the state of the environment and commends the "Top 500 in the world", and formulates the theme of "World Environment Day" according to the world's major environmental problems and environmental hotspots in that year.