when do we celebrate world environment day and why
World Environment Day World Environment Day (WED) occurs on 5 June every year, and is the United Nation's principal vehicle for encouraging worldwide awareness and action for the protection of our environment. First held in 1973, it has been a flagship campaign for raising awareness on emerging environmental issues from marine pollution, human overpopulation, and global warming, to sustainable consumption and wildlife crime. WED has grown to become a global platform for public outreach, with participation from over 143 countries annually. Each year, WED has a new theme that major corporations, NGOs, communities, governments and celebrities worldwide adopt to advocate environmental causes.
World Book Day (UK and Ireland) The Day was first celebrated in 1995 in the United Kingdom. The original, global World Book Day event is generally observed on 23 April - it was changed in the UK to avoid clashes with Easter school holidays and with St George's Day. Conversely, a separate event World Book Night organized by independent charity The Reading Agency is held on 23 April.