International Day of Light
Marking the first laser (1960) — celebrating light in science, art and culture.
1 min read · Fact-checked · Updated for 2027
About International Day of Light
The International Day of Light is celebrated on May 16th, the anniversary of the first successful laser operation by Theodore Maiman in 1960. Coordinated by UNESCO, the day celebrates the role of light in science, medicine, communications, energy and art — from fiber optics to photography.
Read more on WikipediaWhen is International Day of Light?
International Day of Light is celebrated every year on May 16. Upcoming dates:
| Year | Date | Day of week | |
|---|---|---|---|
| International Day of Light 2027 | May 16, 2027 | Sunday🎉 weekend | View date → |
| International Day of Light 2028 | May 16, 2028 | Tuesday | View date → |
| International Day of Light 2029 | May 16, 2029 | Wednesday | View date → |
| International Day of Light 2030 | May 16, 2030 | Thursday | View date → |
| International Day of Light 2031 | May 16, 2031 | Friday | View date → |
How to Celebrate International Day of Light
- 🎯Watch a documentary or read an article connected to International Day of Light.
- 💡Visit a museum, planetarium or observatory — many hold events on this day.
- 📣Share a mind-blowing fact with #InternationalDayofLight.
Official hashtag: #InternationalDayofLight
Frequently Asked Questions
When is International Day of Light 2027?
International Day of Light 2027 is on Sunday, May 16, 2027.
How many days until International Day of Light?
There are 307 days until International Day of Light (May 16, 2027).
What category is International Day of Light?
International Day of Light is categorized as a Science event.
Is International Day of Light a public holiday?
International Day of Light is an observance day, not typically a public holiday. Check your country's official calendar for local public holidays.
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