International Day for the Preservation of Ozone Layer

Event date: 
2017-09-16 (All day)
  South Africa's celebration   theme and messaging   links and websites        
2017 Celebrations 
Theme and messages
Related websites / links



The United Nations’ International Day for the Preservation of the Ozone Layer is celebrated on the 16th September every year. Commemorating the 1987 signing of the Montreal Protocol on Substances that Deplete the Ozone Layer, the day advocates activities that create awareness on topics related to climate change and ozone depletion.

The ozone layer, a fragile shield of gas, protects the Earth from the harmful portion of the sun's rays, thus helping to preserve life on the planet. As such, it is paramount that we protect the ozone layer from harmful substances such as HCFCs (hydrochlorofluorocarbons). HCFCs are both ozone-depleting substances and powerful greenhouse gases that contribute to the thinning of the ozone layer. Nearly 2,000 times more potent than carbon dioxide in adding to global warming, the successful reduction of HCFC emissions remains one of the UN’s greatest challenges.

However, the gradual phasing out of controlled uses of ozone-depleting substances has not only helped protect the ozone layer for this and future generations, but has also contributed significantly to global efforts to address climate change. As a result, it has protected human health and ecosystems by limiting the harmful ultraviolet radiation from reaching Earth.

Last year’s theme celebrated the 30th anniversary of the Vienna convention for the protection of the Ozone Layer, supported by the slogan "Ozone and climate: Restored by a world united.


Vienna Convention for the Protection of the Ozone Layer


The scientific confirmation of the depletion of the ozone layer prompted the international community to establish a mechanism for cooperation to take action to protect the ozone layer. This was formalized in the Vienna Convention for the Protection of the Ozone Layer, which was adopted and signed by 28 countries, on 22 March 1985. In September 1987, this led to the drafting of The Montreal Protocol on Substances that Deplete the Ozone Layer.


The 2017 Theme

The theme for this year's World Ozone Day is Caring for all life under the sun.


Related links website


United Nations (UN)
United Nations Environment Programme (UNEP)


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