Date: Monday, 16 September 2024. 29th Anniversary. Sponsor: United Nations Objective: The International Day for the Preservation of the Ozone Layer is annually observed for the following purposes:to recognize the importance of the ozone layer for the world, to raise awareness of ozone depletion and its adverse effects, and to advocate activities that help to preserve the … [Read more...] about International Day for the Preservation of the Ozone Layer 2024