International Day of Light 2023

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 2023?

International Day of Light 2023 is on Tuesday, 16 May 2023.

What day of the week is International Day of Light 2023?

It falls on Tuesday.

How is International Day of Light calculated?

This event is observed every year on 16 May.