March 22 is the United Nations World Water Day, held annually to raise awareness of the importance of fresh water and advocate for the sustainable management of freshwater resources at international levels.

Agenda 21, a worldwide action plan for areas where human activities may affect the environment was adopted at the UN Conference on Environment and Development (in Rio de Janeiro, Brazil, in June 1992) recommended various measures, including creating World Water Day. The UN General Assembly adopted a resolution on December 22, 1992, declaring March 22 to be the World Day for Water each year. Countries were encouraged to develop activities to highlight local needs for water. The first World Day for Water was observed in 1993.Further, the Water for Life Decade was launched on World Water Day in 2005. This decade will run from 2005 to 2015 and give a high profile to women's participation and the UN's water-related programs.

 Each year a specific aspect of water management is highlighted. In 2013, in reflection of the International Year of Water Cooperation, World Water Day is dedicated to the theme of cooperation around water. The U.N. sees water cooperation as key to security, poverty eradication, social equity and gender equality (