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...
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...
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...
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
🔹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...
09.02.2026 17:38 — 👍 1 🔁 0 💬 0 📌 0
5️⃣ Share your event updates and tag us on socials: www.lightday.org
09.02.2026 17:38 — 👍 1 🔁 0 💬 1 📌 0
4️⃣ Register events: forms.gle/efqo98G2psPo...
09.02.2026 17:38 — 👍 1 🔁 0 💬 1 📌 0
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
Here are 6️⃣ easy steps to get you started for @unesco.org #lightday2026🚀
09.02.2026 17:38 — 👍 1 🔁 0 💬 1 📌 0
How will you celebrate light in 2026? ✨
Event registrations are open. Check out all the inspiring global stories in our latest IDL newsletter.
🔹Theme: Light for a Sustainable Future
🔗 mailchi.mp/b68ecaf4e429...
📸 @spie.org - IDL Photo Contest 2025: Francisco Gamboa, 'Light and Vibration'
@unesco.org
🔔 Start planning events and activities for 2026 raising awareness associated with the 2026 theme. Event registrations are open! mailchi.mp/10599320cc87...
12.11.2025 11:01 — 👍 1 🔁 0 💬 0 📌 0🟩 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.
12.11.2025 11:01 — 👍 1 🔁 0 💬 1 📌 0🟩 The theme also encourages the next generation into education in science, engineering and technology.
12.11.2025 11:01 — 👍 0 🔁 0 💬 1 📌 0🟩 The theme highlights how light-based technologies drive sustainability in areas such as low energy lighting, green manufacturing, and improved agriculture.
12.11.2025 11:01 — 👍 1 🔁 0 💬 1 📌 0
📣 🗞 We have a theme for upcoming #lightday2026❗🗞📣
🔆 💡 Light For A Sustainable Future 💡 🔆
🗞 For more details and updates, check out our latest newsletter: mailchi.mp/10599320cc87...
@unesco.org
#lightday2026
🌟 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!
25.07.2025 16:05 — 👍 0 🔁 0 💬 0 📌 0
✅ 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!
🧵🚨🗞 Our July Newsletter is here🚨🗞
We are thrilled to share the (ongoing) global impact of the 8th edition of @unesco.org #lightday2025!🌍✨
🗞 Dive into our July newsletter for event highlights, and inspiration: mailchi.mp/2d3a1c787f19...
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...
🧵🌟 A Big Thank YOU to our incredible community! 🌟
We are truly grateful to all the passionate event organisers and participants for your tremendous effort in making the 8th edition of @unesco.org #lightday2025 a grand success!
🚨 You can STILL register your events for #lightday2025 even if they are held later this year or you missed! 💡🎉
📥 www.lightday.org/events
And don’t forget to tag us – we love to share your efforts! 🤩
Lighting up a handheld He-Ne tube in the field of a plasma globe #pintofscience Thanks to Andrei Ermolaev for the photo!
20.05.2025 21:01 — 👍 3 🔁 1 💬 0 📌 0