Sunday, 7 September 2025
Promotes action to improve air quality and protect human health and the environment.
Frequently asked questions
- When is International Day of Clean Air for Blue Skies 2025?
- International Day of Clean Air for Blue Skies 2025 is on Sunday, 7 September 2025.
- What day of the week is International Day of Clean Air for Blue Skies 2025?
- It falls on Sunday.
- How is International Day of Clean Air for Blue Skies calculated?
- This event is observed every year on 7 September.