International Earth Day - 22 April
In the 1969 UNESCO Conference in San Francisco, peace activist John McConnell proposed a day to honour the Earth and the concept of peace. The first such event was celebrated on March 21, 1970 to coincide with the first day of spring in the northern hemisphere. A month later the United States Senator Gaylord Nelson proposed the idea to hold a nationwide environmental teach-in on April 22, 1970.
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