Cover image: Ozone Day

Ozone Day

Taking place on 16th September every year.

Remembering the Montreal Protocol to protect the ozone layer.

Updated 10 months ago

The United Nations General Assembly proclaimed 16 September the International Day for the Preservation of the Ozone Layer, commemorating the date, in 1987, on which the Montreal Protocol on Substances that Deplete the Ozone Layer was signed.

For further information and background materials to help you mark Ozone Day in your school, visit the UN's Ozone Day web pages. and the UN Environment Programme's ozone web page.

Organised by

United Nations