World Hydrography Day: 21 June

Every year the World Hydrography Day is observed on 21 June to make the public aware about the hydrography and the essential role that it plays in everyone’s life.
The theme for 2021 WHD is “One hundred years of international cooperation in hydrography ” .
The United Nations General Assembly accepted a resolution to celebrate World Hydrography Day on every June 21 in 2005.
The day is organised by the International Hydrographic Organization (IHO) since 2006 to publicise the work of hydrographers and the importance of hydrography.
21 June has been chosen for the day as it marks the anniversary of the founding of the International Hydrographic Organization on 21 June 1921.
In 2021, IHO is celebrating the 100th anniversary of its formation.
Hydrography deals with the study and measurement of the physical features of oceans, seas, coastal areas, rivers and lakes.
International Hydrographic Organization (IHO) headquarters location: Monte Carlo, Monaco