World Water Day has been observed on 22 March every year since it was established by the UN General Assembly in 1993. The day highlights issues such as a billion people around the world not having access to safe drinking water. This year's event is focused on the links between water and energy. See the UN Water site for more info.

The idea is to make people think twice about how much water they waste. People who have plentiful access to water are encouraged to try not turning on their taps all day.