Archive · 20 Jun 2025
World Hydrography Day 2025: Date, Significance, and Origins
World Hydrography Day is a yearly event to learn about hydrography, which is like mapping oceans, rivers, and lakes.
This day is to show how important it is to know about water for things like safe boating and protecting the environment.
It also celebrates the people and organizations that work to understand and measure the world's waters.
The IHO was created in 1921 to help with this work, and the United Nations officially recognized World Hydrography Day in 2005.
This day will be on Saturday in 2025.
World Hydrography Day is observed annually to raise awareness about hydrography.
The day is observed on Saturday in 2025.
Hydrography measures and describes the physical features of water bodies.
The day recognizes the importance of mapping and exploring water bodies.
World Hydrography Day commemorates the founding of the IHO in 1921.
- Who
- For everyone, particularly those interested in hydrography and its impact.
- What
- A day to raise awareness about hydrography and its importance.
- When
- Annually, and in 2025 it will be on a Saturday.
- Where
- Globally, with surveys taking place worldwide.
- Why
- To highlight the role of hydrography in various fields like navigation and environmental protection.
- Purpose
- Raise awareness about hydrography and its contributions
- Observed
- Annually
- Date in 2025
- Saturday
- Focus
- Mapping and exploring water bodies
- Established
- To commemorate the founding of the IHO in 1921.