World Ozone Day 2026: ‘Global Action For A Cooler Planet’ Takes Centre Stage

World Ozone Day, officially called the International Day for the Preservation of the Ozone Layer, was observed on September 16, with the United Nations highlighting the theme “Global Action for a Cooler Planet”.

The 2026 observance also marks a decade of the Kigali Amendment and celebrates the progress achieved through the Montreal Protocol. The UN has described the Montreal Protocol as an example of how international cooperation, scientific evidence, effective implementation, financial support and strong partnerships can produce lasting environmental gains. The agreement has helped countries protect the ozone layer while moving industries towards safer alternatives.

The Kigali Amendment has added a major climate dimension to the treaty by targeting hydrofluorocarbons (HFCs), which are potent greenhouse gases used extensively in refrigeration and air-conditioning. Adopted in 2016, the amendment seeks to gradually reduce HFC use worldwide while encouraging more energy-efficient and climate-friendly cooling technologies.

According to the UN, the experience of the past 10 years shows that environmental protection and economic development can progress together. The transition to cleaner cooling technologies has also created opportunities for innovation and improvements across the cooling industry.

Ozone Layer: Why It Matters

The ozone layer forms a protective shield around Earth, absorbing much of the Sun’s harmful ultraviolet radiation. It plays an important role in protecting people, ecosystems and other forms of life.

Human-made chemicals have been responsible for significant ozone damage. These include chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), halons and other substances containing chlorine or bromine.

Why September 16 Is World Ozone Day

The UN General Assembly established September 16 as the International Day for the Preservation of the Ozone Layer in 1994. The date commemorates the signing of the Montreal Protocol in 1987.

The day also marks a historic achievement in international environmental cooperation. On September 16, 2009, the Vienna Convention and the Montreal Protocol became the first treaties in UN history to receive universal ratification.

UN Calls For Sustainable Cooling

UN Secretary-General Antonio Guterres has stressed the importance of efficient cooling as rising temperatures and increasingly frequent extreme-heat events create greater demand for cooling systems. The UN says access to cooling can be essential for protecting lives during extreme heat, but expanding cooling solutions must be done sustainably and equitably.

For World Ozone Day, the UN Environment Programme’s Ozone Secretariat has released a social media package in six languages. The campaign includes posters, digital cards and suggested messages aimed at spreading awareness about ozone protection and sustainable cooling.