The International Day of Light, observed on 16th May, is a global initiative that celebrates the importance of light in various aspects of our lives. From science and technology to culture and art, education to sustainable development, and even medicine, communication, and energy, light plays a vital role. This annual event serves as a focal point for appreciating the significance of light and its impact on society. By exploring the broad theme of light, the International Day of Light encourages participation from diverse sectors worldwide, showcasing how science, technology, art, and culture contribute to UNESCO's goals of education, equality, and peace.

Administered by the International Basic Science Programme (IBSP) of UNESCO, the event is coordinated by a dedicated Steering Committee that collaborates with international partners. This website is licensed under a Creative Commons Attribution 4. 0 International License and is hosted by Lightsources. org, a collaborative platform of communicators from light source facilities globally.