International Decade of Soil Health
Soil health and its sustainable management is critically important in advancing the Sustainable Development Goals of the United Nations
International Year of Caves and Karst
Organized by the International Union of Speleology, to inform the world of the great value of caves to humanity
UN Decade of Ocean Science for Sustainable Development
Organized under the leadership of the Intergovernmental Oceanographic Commission of UNESCO
International Year of Basic Sciences for Development
Organized under the leadership of the International Union of Pure and Applied Physics

International Year of Science Engagement
Planned to be organized in 2027 under the aegis of UNESCO, its purpose is to strengthen the role of global Science Engagement toward the achievement of Agenda 2030 and the United Nations SDGs.
Past international years and decades
A global initiative to highlight the importance of sound and related sciences and technologies for all in society
International Year of Plant Health
Inspiring people to learn more about plant health, which we all depend on, and to take concrete action
International Year of the Periodic Table of Chemical Elements
The development of the Periodic Table of the Elements is one of the most significant achievements in science.
Raising public awareness of the importance of photonics (the science and technology of generating, controlling and detecting photons, or light particles)
Sponsored by ICSU and the WMO, it became the largest coordinated research program in the Earth’s polar regions