Earth Day => 22 April Coordinated globally by Earth Day Network UNESCO conference in San Francisco, 1969
Earth Hour => 8:30-9:30pm (last Saturday of March) By WWF switch off non-essential lights for one hour Started as a lights-off event in Sydney in 2007 Now, 7000 cities across 172 countries
International Day of Biological Diversity => 22 May By UN To increase understanding and awareness of biodiversity issues
World Environment Day => 5 June By UN Encouraging worldwide awareness and action for envt protection
Int Day For Preservation of Ozone Layer => 16 Sept by UNGA commemorating the signing of the Montreal Protocol, 1987
Day of Forests => 21 March By UNGA Secretariat of UN Forum on Forests + FAO
World Habitat Day => first Monday of Oct By UN 1986
