When: 7 September 2025
Where: Worldwide
Held under the theme “Racing for Air”, the sixth International Day of Clean Air for blue skies will emphasize the need to accelerate solutions and collective action to deliver clean air for all.
This year’s campaign links clean air to sport, performance, endurance, and equity - highlighting the urgency of action while shifting the narrative from problems to solutions.
Air pollution is the second leading risk factor for death, causing around 8.1 million premature deaths annually from conditions such as stroke, heart disease, lung cancer, and acute respiratory infections.
The United Nations General Assembly designated 7 September as International Day of Clean Air for blue skies in 2019, with the first Day held in 2020. The UN General Assembly’s resolution stresses the importance of, and urgent need to, raise public awareness at all levels and to promote and facilitate actions to improve air quality.
Visit the official campaign page for more information.
See also the UN observance page.
