World Hydrography Day
Marked on 21 June to raise awareness of hydrography, the survey and charting of seas and waterways that keeps shipping safe.
- UK
- USA
- International
ListingAdded by us from official sources
Last checked19 October 2026
First heldNot known
About the day
World Hydrography Day is promoted by the International Hydrographic Organization, whose secretariat sets a theme each year. The 2026 theme is about transforming how ocean data is shared.
Dates for the next three years
| Year | Date | Where | Status |
|---|---|---|---|
| 2027 | Monday 21 June 2027 | UK, USA, International | Same date every year |
| 2028 | Wednesday 21 June 2028 | UK, USA, International | Same date every year |
| 2029 | Thursday 21 June 2029 | UK, USA, International | Same date every year |
Where this information comes from
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