World Quantum Day
4.14 — the first digits of Planck's constant — celebrating quantum science and technology.
1 min read · Fact-checked · Updated for 2027
About World Quantum Day
World Quantum Day is celebrated on April 14th, chosen because 4.14 are the first digits of Planck's constant (4.14 × 10⁻¹⁵ eV·s), the fundamental constant of quantum mechanics. Launched by scientists in 2021, the day promotes public understanding of quantum science as quantum computing and communication move from labs to industry.
Read more on WikipediaWhen is World Quantum Day?
World Quantum Day is celebrated every year on April 14. Upcoming dates:
| Year | Date | Day of week | |
|---|---|---|---|
| World Quantum Day 2027 | April 14, 2027 | Wednesday | View date → |
| World Quantum Day 2028 | April 14, 2028 | Friday | View date → |
| World Quantum Day 2029 | April 14, 2029 | Saturday🎉 weekend | View date → |
| World Quantum Day 2030 | April 14, 2030 | Sunday🎉 weekend | View date → |
| World Quantum Day 2031 | April 14, 2031 | Monday | View date → |
How to Celebrate World Quantum Day
- 🎯Watch a documentary or read an article connected to World Quantum Day.
- 💡Visit a museum, planetarium or observatory — many hold events on this day.
- 📣Share a mind-blowing fact with #WorldQuantumDay.
Official hashtag: #WorldQuantumDay
Frequently Asked Questions
When is World Quantum Day 2027?
World Quantum Day 2027 is on Wednesday, April 14, 2027.
How many days until World Quantum Day?
There are 275 days until World Quantum Day (April 14, 2027).
What category is World Quantum Day?
World Quantum Day is categorized as a Science event.
Is World Quantum Day a public holiday?
World Quantum Day is an observance day, not typically a public holiday. Check your country's official calendar for local public holidays.
More Science Days
International Day of Women and Girls in Science
February 11
A UN day promoting full and equal access and participation of women and girls in science, technology, engineering, and mathematics.
Pi Day (3.14)
March 14
Celebrated on 3/14 to match the first digits of π (3.14159…), Pi Day honors mathematics with pie-eating contests, math challenges, and classroom fun.
Fibonacci Day
November 23
11/23 — the first four digits of the famous sequence (1, 1, 2, 3).
World Meteorological Day
March 23
Marking the founding of the WMO — the science of weather, climate and water.