International Day of Light 2019

Celebrate light again with OSA on 16 May 2019.

OSA Student Chapters: We have collaborated with Laser Classroom to create a special edition kit for outreach activities called Lights and Lasers 101. Here is just a sample of activities and topics available in the kit: 

  • The Properties of Laser Light
  • Diffraction
  • How to Measure the Wavelength of a Laser
  • Additive Color Mixing and White Light
  • Any Many More! 

Kits are available to OSA Student Chapters in good standing through the OSA Grants Database until 15 March. To inquire on additional information, contact

Attend the UNESCO-ICTP Illuminating Education Conference at ICTP in Trieste Italy.

The Illuminating Education conference is the Flagship Celebration of the International Day of Light 2019 held at the UNESCO Category 1 Institute ICTP in Trieste on 16 May 2019. Presentations will cover a wide range of topics, from inspiring science to practical career advice, and travel grants are available. Request a visa letter or travel grant by 17 March. To learn more and apply for a grant to attend, check out their poster (pdf).

Share your International Day of Light event with OSA and the global community.

If you, your chapter or your organization is hosting an event for the International Day of Light, we encourage you to promote your event by:

  1. Posting it to the official International Day of Light event page.
  2. Tweeting details @OpticalSociety and @IDL2019 using #IDL2019.