Tuesday, 16 September 2025
Marks the signing of the Montreal Protocol and promotes protection of the ozone layer.
Also known as
- World Ozone Day
Frequently asked questions
- When is International Day for the Preservation of the Ozone Layer 2025?
- International Day for the Preservation of the Ozone Layer 2025 is on Tuesday, 16 September 2025.
- What day of the week is International Day for the Preservation of the Ozone Layer 2025?
- It falls on Tuesday.
- How is International Day for the Preservation of the Ozone Layer calculated?
- This event is observed every year on 16 September.