Updates for the global multi-society celebration will be added here.
CLEO:2018 will include a celebration of the International Day of Light on 16 May.
Learn more about the global celebration of light in 2015.
The Optical Society (OSA) supports the UNESCO endorsement of the International Day of Light. Stay tuned to this page to learn how you can say thank you to light and celebrate on 16 May 2018.