Awareness Health
World Mosquito Day
Held on 20 August, World Mosquito Day marks Sir Ronald Ross's 1897 discovery that mosquitoes transmit malaria, and highlights mosquito borne diseases.
- UK
- USA
- Ireland (not marked)
- Canada (not marked)
- Australia (not marked)
- New Zealand (not marked)
- International
ListingAdded by us from official sources
Last checked19 October 2026
First heldNot known
About the day
Ross, who later won a Nobel Prize, showed that female Anopheles mosquitoes carry the malaria parasite. The London School of Hygiene and Tropical Medicine and malaria charities use the day for events and fundraising.
Dates for the next three years
| Year | Date | Where | Status |
|---|---|---|---|
| 2027 | Friday 20 August 2027 | UK, USA, International | Same date every year |
| 2028 | Sunday 20 August 2028 | UK, USA, International | Same date every year |
| 2029 | Monday 20 August 2029 | UK, USA, International | Same date every year |
Where this information comes from
Spotted a mistake? If you run this day, claim it to correct it.