🔔 Start planning events and activities for 2026 raising awareness associated with the 2026 theme. Event registrations are open! mailchi.mp/10599320cc87...

🟩 The theme links to the priorities of UNESCO and the United Nations Sustainable Development Goals (SDGs), and supports the International Decade of Sciences for Sustainable Development.

🟩 The theme also encourages the next generation into education in science, engineering and technology.

🟩 The theme highlights how light-based technologies drive sustainability in areas such as low energy lighting, green manufacturing, and improved agriculture.

🌟 Our committed volunteers, organisers, and sponsors are at the heart of this success! Huge THANKS to all who organised events for inspiring many about the science of light and its impact on society and to those who participated in the global celebration. Until #lightday2026!

✅ 450+ inspiring events were held
✅ Across 59+ countries and worldwide
✅ 125,000+ participants engaged, at both targeted local and national levels
✅ Covering themes from science and photonics to art, education, health, energy, culture, and more!

For those who missed, we are happy to continue accepting event registrations for the year. So grab your chance and secure a spot in our global events map! 
www.lightday.org/events

🎓 Participation Certificate
To recognise your valuable contribution we have created a Certificate of Participation you can personalise with your name, your event name, or your participants’ names. Feel free to download/share/ distribute it as a token of appreciation!
www.lightday.org/_files/ugd/c...

Let's take a break!

The study of light has led to promising energy sources, lifesaving medical care, high-speed internet, and so many discoveries that we can't name them all at once.

Our friends over at @idlofficial.bsky.social have a lot to share from events happening all over the world.

🔶 To celebrate #lightday2025 laboratories from Grand Est region of France (as well as Luxembourg) will host a range of events in 6 cities to raise awareness among high school students about the fascinating world of light & its applications
institut-photonique.fr/event/journe...

🔶IALD Southern Europe Celebrates the International Day of Light with a Multi-City Pecha Kucha Event
iald.org/IALD/Events/...

🔶 The Daylight Award, the biennial prize honouring outstanding contributions to daylight research and daylight in architecture, is now open for nominations for its 2026 edition. For the first time, the award is presented by the Daylight Academy (DLA)
thedaylightaward.com

🔶 Learn more about the @spie.org's Outreach Grants and SPIE- IDL Photo Contest 2025
➡️ spie.org/community-su...
➡️ spie.org/community-su...

🔶 Get to know the Chinese Optical Society activities for the International Day of Light