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International Day of Light 2026 – SIF–SIOF Call (5th Edition)

International Day of Light 2026

May 16, 2026

The International Day of Light, proclaimed by UNESCO and celebrated every year on 16 May, commemorates the first laser ever built by T. H. Maiman in 1960. This global initiative highlights the key role of light and light-based technologies in science, culture, education, and sustainable development.

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