International Day of Light 2026

International Day of Light celebrates light science and its applications in culture, education and sustainable development.

Frequently asked questions

When is International Day of Light 2026?

International Day of Light 2026 is on Saturday, 16 May 2026.

What day of the week is International Day of Light 2026?

It falls on Saturday.

How is International Day of Light calculated?

This event is observed every year on 16 May.