Asteroid Day
Marking the 1908 Tunguska explosion — a UN-recognized day about asteroid science and planetary defense.
1 min read · Fact-checked · Updated for 2027
About Asteroid Day
Asteroid Day, co-founded by astrophysicist and Queen guitarist Brian May, is observed on June 30th — the anniversary of the 1908 Tunguska event, when an asteroid airburst flattened 2,000 km² of Siberian forest. Recognized by the UN in 2016, the day promotes asteroid research and planetary-defense missions like NASA's DART.
Read more on WikipediaWhen is Asteroid Day?
Asteroid Day is celebrated every year on June 30. Upcoming dates:
| Year | Date | Day of week | |
|---|---|---|---|
| Asteroid Day 2027 | June 30, 2027 | Wednesday | View date → |
| Asteroid Day 2028 | June 30, 2028 | Friday | View date → |
| Asteroid Day 2029 | June 30, 2029 | Saturday🎉 weekend | View date → |
| Asteroid Day 2030 | June 30, 2030 | Sunday🎉 weekend | View date → |
| Asteroid Day 2031 | June 30, 2031 | Monday | View date → |
How to Celebrate Asteroid Day
- 🎯Watch a documentary or read an article connected to Asteroid Day.
- 💡Visit a museum, planetarium or observatory — many hold events on this day.
- 📣Share a mind-blowing fact with #AsteroidDay.
Official hashtag: #AsteroidDay
Frequently Asked Questions
When is Asteroid Day 2027?
Asteroid Day 2027 is on Wednesday, June 30, 2027.
How many days until Asteroid Day?
There are 352 days until Asteroid Day (June 30, 2027).
What category is Asteroid Day?
Asteroid Day is categorized as a Science event.
Is Asteroid Day a public holiday?
Asteroid Day is an observance day, not typically a public holiday. Check your country's official calendar for local public holidays.
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