In 1994, the UN General Assembly proclaimed 16 September the International Day for the Preservation of the Ozone Layer, commemorating the date of the signing, in 1987, of the Montreal Protocol on Substances that Deplete the Ozone Layer (resolution 49/114).
The International Day for the preservation of the Ozone layer is observed on September 16 every year. This day is also known as World Ozone Day. The main purpose of this day is to raise awareness of the depletion of the Ozone Layer and search for solutions to preserve it.
The United Nations General Assembly designated the day of World Ozone Day to mark the signing of the Montreal Protocol on Substances that Deplete the Ozone Layer in 1987. The day was designated on December 19th, 2000.The Theme 2021 for World Ozone Day: ‘Montreal Protocol – keeping us, our food and vaccines cool.’