22 March
World Water Day is held annually on 22 March as a means of focusing attention on the importance of freshwater and advocating for the sustainable management of freshwater resources.
World Water Day grew out of the 1992 United Nations Conference on Environment and Development (UNCED) in Rio de Janeiro.
The United Nations General Assembly designated 22 March of each year as the World Day for Water. The observance of world day for water started in 1993.
Source: United Nations World Water Day
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