Global Tree calendar
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March 3 Africa Environment Day/ Wangari Maathai day
The African Union adopted a decision calling for the joint celebrations of the African Environment Day and Wangari Maathai Day in recognition of the work and life of the late Wangari Maathai. March 21 International Day of Forests April 1 Wangari Maathai (born 1940) April 22 Earth Day - to raise global awareness to take positive environmental action to protect nature and the planet Earth Trees for Wangari organised by Gandhi Earth Keepers International May 22 International Day for Biological Diversity May London Tree Week 2017: 27 May - 4 June June 5 World Environment Day 2017 Host country Canada Green Belt Movement established 1977 - National Council of Women of Kenya march to Kamukunji Park, Nairobi - seven trees in honour of historical community leaders June 17 World day to combat desertification and drought Sept 21 International Day of Peace Oct 21 Apple Tree day UK Nov-Dec National Tree Week UK Saturday 24 November - Sunday 2 December 2018 Tree Charter Day - last Saturday of November |