Looking Ahead to the International Day of Light 2026
As 2025 comes to an end, the global success of the international Day of Light (IDL) 2025 continues to inspire: 450 events in more than 59 countries reached around 125,000 participants at local and national activities, with many more joining global initiatives. And preparations for IDL 2026 are already under way.
The year 2026 will also coincide with the UN International Year of Volunteers for Sustainable Development, underscoring the essential role of volunteers in science outreach and education.
The official theme for IDL 2026 is «Light for a Sustainable Future», highlighting how light-based science and technology contribute to sustainable development worldwide.
There is a extensive archive of ideas, materials, and past IDL events. Reusing successful activities is encouraged, as each year typically attracts new audiences. The IDL is an initiative by UNESCO.