Special Issue on the International Day for the Preservation of the Ozone Layer, 16 September 2021 The World Ozone Day 2021 theme and tagline - Keeping Us, Our Food and Vaccines Cool On 19 December 1994, 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. States are invited to devote the Day each year to promote, at the national level, activities in accordance with the objectives of the Montreal Protocol and its amendments. Please refer to the Ozone Day webpage in the OzonAction website. We thank you for your ongoing commitment to compliance with the Montreal Protocol and your excellent work in implementing your national strategies and projects. OzonAction team wishes you a successful celebration!