Thursday, 16 September 1999
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 1999?
- International Day for the Preservation of the Ozone Layer 1999 is on Thursday, 16 September 1999.
- What day of the week is International Day for the Preservation of the Ozone Layer 1999?
- It falls on Thursday.
- How is International Day for the Preservation of the Ozone Layer calculated?
- This event is observed every year on 16 September.