International Day of Light 2019

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 2019?

International Day of Light 2019 is on Thursday, 16 May 2019.

What day of the week is International Day of Light 2019?

It falls on Thursday.

How is International Day of Light calculated?

This event is observed every year on 16 May.