Name Date Description
February 2 It marks the date of the signing of the Convention on Wetlands, called the Ramsar Convention, on 2nd of February 1971, in the Iranian city of Ramsar on the shores of the Caspian Sea. WWD was celebrated for the first time in 1997 and made an encouraging beginning. Each year, government agencies, non-governmental organizations, and groups of citizens at all levels of the community take advantage of the opportunity to undertake actions aimed at raising public awareness of wetland values and benefits in general and the Ramsar Convention in particular.
March 22 World Water Day has been observed on 22nd of March since 1993 when the United Nations General Assembly declared 22nd of  March as the "World Day for Water". This day was first formally proposed in Agenda 21 of the 1992 United Nations Conference on Environment and Development (UNCED) in Rio de Janeiro, Brazil. Observance began in 1993 and has grown significantly ever since; the public is encouraged not to use their taps throughout the whole day in order to show support.
April 22 Earth Day is an annual event, celebrated on 22nd of April, on which events are held worldwide to demonstrate support for environmental protection. It was first celebrated in 1970, and now is coordinated globally by the Earth Day Network, and celebrated in more than 192 countries each year.
May 22 The International Day for Biological Diversity (or World Biodiversity Day) is a United Nations – sanctioned international day for the promotion of biodiversity issues. It is currently held on 22nd of May. From its creation by the Second Committee of the UN General Assembly in 1993 until 2000, it was held on 29th of December to celebrate the day the Convention on Biological Diversity went into effect. On 20th of December 2000, the date was shifted to commemorate the adoption of the Convention on 22nd of May 1992 at the Rio Earth Summit, and partly to avoid the many other holidays that occur in late December.
June 5 World Environment Day (WED) is celebrated every year on 5th of June to raise global awareness of the need to take positive environmental action. It was established by the United Nations General Assembly in 1972. The first World Environment Day was observed in 1973. It is hosted every year by a different city with a different theme and is commemorated with an international exposition in the week of 5th of June.  It is run by the United Nations Environment Programme (UNEP).
June 8 World Oceans Day has been unofficially celebrated every 8th of June since its original proposal in 1992 by Canada at the Earth Summit in Rio de Janeiro, Brazil. It was officially recognized by the United Nations in 2008. Since then, it has been coordinated internationally by The Ocean Project and the World Ocean Network with greater success and global participation each year.
June 15 Global Wind Day is a worldwide event that occurs annually on 15th of June. It is organized by EWEA (European Wind Energy Association) and GWEC (Global Wind Energy Council). It is a day when wind energy is celebrated, information is exchanged, and adults and children learn about wind energy, its power and the possibilities it holds to change the world.
June 17 The World Day to Combat Desertification and Drought is a United Nations observance on each 17th of June. This day was proclaimed on 30th of January 1995 by the United Nations General Assembly resolution. Its purpose is to highlight ways to prevent desertification and recover from drought. Each annual celebration has a different theme.
September 16 The United Nations' International Day for the Preservation of the Ozone Layer is celebrated on 16th of September every year. This event commemorates the date of the signing of the Montreal Protocol on Substances that Deplete the Ozone Layer in 1987.
September 18 World Water Monitoring Day was established in 2003 by America's Clean Water Foundation as a global educational outreach program that aims to build public awareness and involvement in protecting water resources around the world by empowering citizens to carry out basic monitoring of their local water bodies.
September 26 Each year, 26th of September marks World Environmental Health Day. A day dedicated to the celebration of environmental health, the recognition of the hard work and dedication of those who make a difference, and the promotion of environmental health education.
Last Sunday in September World Rivers Day is a global celebration of the world's waterways, observed every last Sunday in September. Established in 2005, it highlights the many values of rivers and strives to increase public awareness while encouraging the improved stewardship of rivers around the world. World Rivers Day occurs annually on the last Sunday in September.
First Monday in October World Habitat Day is observed every year on the first Monday of October throughout the world. It was officially designated by the United Nations and first celebrated in 1986. The purpose of the day is to reflect on the state of our cities and towns and the basic human right to adequate shelter. It also aims to remind the world of its collective responsibility for the habitat of future generations.
Second Wednesday in October The International Day for Disaster Reduction (IDDR) encourages every citizen and government to take part in building more disaster resilient communities and nations. The United Nations General Assembly designated the second Wednesday of October as the International Day for Natural Disaster Reduction as part of its proclamation of the International Decade for Natural Disaster Reduction.
October 24 "International Day of Climate Action" on 24th of October 2009, was organized by to influence the delegates going to the United Nations Framework Convention on Climate Change meeting in December, 2009 (COP15). This was the first global campaign ever organized around a scientific data point. The actions organized by included gigantic depictions of the number "350", walks, marches, rallies, teach-ins, bike rides, sing-a-thons, carbon-free dinners, retrofitting houses to save energy, tree plantings, mass dives at the Great Barrier Reef, solar-cooked bake-outs, church bell ringings, underwater cabinet meetings (Maldives), and armband distributions to athletes. The organization reported that over 5.200 synchronized demonstrations occurred in 181 countries on the day. The group reports that they organized the world's "most widespread day of political action" on Saturday 24th of October 2009, reporting 5.245 actions in 181 countries.
December 5 World Soil day celebrates the importance of soil as a critical component of the natural system and as a vital contributor to the human commonwealth through its contribution to food, water and energy security, and as a mitigator of biodiversity loss and climate change. It is celebrated particularly by the global community of 60.000 soil scientists entrusted with the responsibility of generating and communicating soil knowledge for the common good. Many events are focused on increasing public awareness of soil and its contribution to humanity and the environment. It is held on 5th of December due to the fact that it corresponds with the official birthday of H.M. King Bhumibol Adulyadej, the King of Thailand, who officially sanctioned the event.
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