An incredible resource on light science, technology, and applications for science educators!

📣 Our April Newsletter is here‼️
And we have exciting light science impact stories from around the world to share with you! ✨
📸 @spie.org-IDL Photo Contest 2025: ‘Spread’ by Lichun Zhou
🗞️ mailchi.mp/3903aba92006...

Your smartphone is one of the most advanced photonics devices ever built 📱 This #lightday2026 find out how you can use your own smartphone to perform scientific measurements with simple apps and add-ons 💡
web.archive.org/web/20211221...

Subscribe to our newsletter for the latest news and updates from the global IDL community:
lightday.us15.list-manage.com/subscribe?u=...

🌟 🗞March #newsletter is here!
We have exciting updates from the global #unesco International Day of Light (IDL) community!
➡️ mailchi.mp/4b23cae020f2...

📷 @spie.org - IDL Photo Contest 2025: 'Cradle of Light' by Lalith Ekanayake
#lightday2026

@uni-jena.de

International Day of Light 2026 Event Registration Thank you very much for organising an event supporting the International Day of Light (IDL); this form will allow you to register it in the official International Day of Light calendar. To help us pr...

Whether you focus on our 2026 theme – 'Light For A Sustainable Future' or any topic related to the broad theme of light, your effort matters.
Make It Official! Register your event: forms.gle/efqo98G2psPo...

Quick Guide to Organising an IDL Event | International Day of Light

Think of ways light connects to your work or the initiatives that you do. Organise an event, raise awareness or engage the public of all age groups on the importance of light.
www.lightday.org/quickguide-o...

Light and Education & Culture | idlight

Light is an inspiring subject in many disciplines, and is the perfect catalyst to promote science education among young people 📚
For the International Day of Light 2026, let’s try to have an impact on the world, through this unifying theme✨
www.lightday.org/education-cu...

🧵Why Organise an Event for #UNESCO #lightday2026?

Every year the International Day of Light (IDL) provides a perfect platform to honour the technological, physical, social and artistic uses of light💡

📷Quote: Message from Ms Audrey Azoulay, Director-General of UNESCO for #lightday2025

📢 Submit to EOSAM 2026 and get a chance to showcase your research to an international audience of experts in optics and photonics.

📅 Submission deadline: 14 April 2026
🔗 Submit your work here: www.conftool.com/eosam2026

🌐 For more details, visit: www.europeanoptics.org/events/eos/e...

International Day of Light 2026 Event Registration Thank you very much for organising an event supporting the International Day of Light (IDL); this form will allow you to register it in the official International Day of Light calendar. To help us pr...

👉 Register your event at forms.gle/efqo98G2psPo... and become part of a global celebration of light

International Day of Light 2026 Event Registration Thank you very much for organising an event supporting the International Day of Light (IDL); this form will allow you to register it in the official International Day of Light calendar. To help us pr...

🌈 A YouTube video explaining how rainbows form
💡Classroom experiment with prisms
🌱 Conversations on Energy and Sustainable futures 🔬 Science workshops & school sessions on optics and Photonics
No event is too small, and no community too remote!
👉 forms.gle/efqo98G2psPo...

International Day of Light 2026 Event Registration Thank you very much for organising an event supporting the International Day of Light (IDL); this form will allow you to register it in the official International Day of Light calendar. To help us pr...

🔭 Be it an astronomy session or a stargazing night
🎨 Light painting & art installations in a gallery
📸 Photography walk
🏛️ Talks about the role of light and lighting in architecture
👉 forms.gle/efqo98G2psPo...

🧵🎪 Already ran your event for #unesco #lightday2026 but forgot to register? You can still do it! Past events are welcome. We welcome every event at any scale from every corner of the world🌍🌎🌏
forms.gle/efqo98G2psPo...

✨Here's to the countless women who have always been a source of brilliance the world couldn't afford to dim. Here's to the women who illuminate, guide, shine and lift others into the light alongside them ✨ #happyinternationalwomensday

International Day of Light 2026 Event Registration Thank you very much for organising an event supporting the International Day of Light (IDL); this form will allow you to register it in the official International Day of Light calendar. To help us pr...

This year’s theme is 'Light for a Sustainable Future.'
As you plan your activities, think about how your event can connect with @UN SDGs, innovation, peace, and building a brighter future for everyone.
Register: forms.gle/efqo98G2psPo...

International Day of Light 2026 Event Registration Thank you very much for organising an event supporting the International Day of Light (IDL); this form will allow you to register it in the official International Day of Light calendar. To help us pr...

Already organised an event for #lightday2026, but forgot to register? It's never too late to register your events with us. Simply fill up the registration form on our website and make your events IDL official.
forms.gle/efqo98G2psPo...

International Day of Light 2026 Event Registration Thank you very much for organising an event supporting the International Day of Light (IDL); this form will allow you to register it in the official International Day of Light calendar. To help us pr...

Planning an event for #lightday2026 later in 2026 and not exactly on May 16? That’s absolutely fine, you can register it now!
forms.gle/efqo98G2psPo...

🧵✨ Have an idea for the UNESCO #lightday2026?
We’d love to hear about it! ✨

Whether your event is fully planned or just starting to take shape, you can pre-register now and update the details later. It only takes a few minutes to get started 💡
forms.gle/efqo98G2psPo...

🔍 Planning an activity for #unesco #lightday2026?

Explore hands-on #optics and #photonics resources developed by our colleagues at SPIE to help you organise engaging, interactive science events for your community 🔦💡

spie.org/education/ed...

📸 SPIE

🌟LIGHT & ASTRONOMY Resources🔭
Check out the hands-on activities and resources from astroEDU that bring the science of light and astronomy to life for diverse audiences.
Organise an activity. Join the global celebration #unesco #lightday2026
🔗 astroedu.iau.org/en/search/?q...
📸 astroEDU

Events | idlight

🔹Register your events with us to participate in the global celebration of light. Give your valuable efforts a worldwide exposure, and use our platform to connect with fellow organisers and sponsors 🤩
www.lightday.org/events

🔹Looking for ideas and inspirations to plan educational activities for #lightday2026 ? How about 1️⃣0️⃣0️⃣🤩

Check out the incredible e-book featuring 100 educational activities about #light and #photonics
www.unawe.org/resources/gu...

📷 IYL2015/UNAWE/S. Simionato/P. Russo

On United Nations's #InternationalDayofWomenandGirlsinScience share the inspiring stories about #womeninscience with us.✨Highlight the crucial role women play in the optics and photonics community! Are you also organising events on #WomenInSTEM? Register⬇️
forms.gle/efqo98G2psPo...

6️⃣ Get featured in our Newsletter www.lightday.org/newsletter-a...

5️⃣ Share your event updates and tag us on socials: www.lightday.org

4️⃣ Register events: forms.gle/efqo98G2psPo...

3️⃣ Plan Activities
Quick Guide: www.lightday.org/quickguide-o...

2️⃣ Check Resources: www.lightday.org/resources
Past IDL events: www.lightday.org/previous-years

1️⃣ Gather Ideas
2026 Theme: www.lightday.org/news