When is World Asteroid Day?
📅 World Asteroid Day Calendar (2027-2035)
| Year | Day | Date | Days Left |
|---|---|---|---|
| 2027 | Wed | June 30, 2027 | 293 days |
| 2028 | Fri | June 30, 2028 | 659 days |
| 2029 | Sat | June 30, 2029 | 1024 days |
| 2030 | Sun | June 30, 2030 | 1389 days |
| 2031 | Mon | June 30, 2031 | 1754 days |
| 2032 | Wed | June 30, 2032 | 2120 days |
| 2033 | Thu | June 30, 2033 | 2485 days |
| 2034 | Fri | June 30, 2034 | 2850 days |
| 2035 | Sat | June 30, 2035 | 3215 days |
World Asteroid Day will next be observed on Wednesday, June 30, 2027. The date is fixed rather than estimated. The United Nations recognizes June 30 each year as International Asteroid Day.
World Asteroid Day 2027 Date
World Asteroid Day, commonly called Asteroid Day, is held every year on June 30. The date marks the anniversary of the Tunguska event of June 30, 1908, when a large atmospheric explosion flattened a wide area of forest in Siberia.
Because the observance follows a fixed calendar date, its future dates can be confirmed without predicting a changing schedule. The weekday changes from year to year, but the month and day remain the same.
| Year | Date | Day |
|---|---|---|
| 2027 | June 30, 2027 | Wednesday |
| 2028 | June 30, 2028 | Friday |
| 2029 | June 30, 2029 | Saturday |
| 2030 | June 30, 2030 | Sunday |
| 2031 | June 30, 2031 | Monday |
| 2032 | June 30, 2032 | Wednesday |
| 2033 | June 30, 2033 | Thursday |
| 2034 | June 30, 2034 | Friday |
| 2035 | June 30, 2035 | Saturday |
Where World Asteroid Day Takes Place
World Asteroid Day does not have one mandatory venue. It is a global observance supported by independently organized events in schools, universities, museums, observatories, science centres and community spaces. Online sessions may also be available.
The Luxembourg-based Asteroid Foundation coordinates the official Asteroid Day programme and has hosted public events and broadcasts in Luxembourg. Local activities in other countries are arranged by their own organizers, so dates, times and entry rules can differ. Official registration guidance allows events to take place on or around June 30 rather than requiring every activity to occur on the exact observance date.
What Happens on Asteroid Day
There is no single worldwide timetable. Each organizer chooses a format suited to its audience, while the central subjects remain asteroid science, near-Earth objects, space missions and planetary defence.
Common Event Formats
- Talks by astronomers, mission specialists, astronauts or science educators
- Public discussions about asteroid detection, tracking and impact-risk communication
- School lessons, quizzes, demonstrations and hands-on science activities
- Film screenings and recorded interviews about asteroid missions
- Observatory sessions, astronomy presentations or guided stargazing
- Online lectures, panel discussions and livestreamed programmes
The exact 2027 speakers, venues and broadcast times will depend on the official programme and the listings submitted by local hosts. Visitors can check the Asteroid Day events calendar for newly announced activities.
Tickets and Registration
There is no universal World Asteroid Day ticket. Access is managed separately by each event organizer. A public lecture may be free but require advance registration, while a school activity may be limited to enrolled students. Some online programmes can be watched without booking.
Before travelling, confirm the event date, local start time, venue address, age rules and registration status on the individual listing. June 30 is the official observance date, but a nearby festival or lecture may be scheduled during the preceding weekend or another date close to it.
How to Watch World Asteroid Day Online
When an official stream is scheduled, viewing information is normally published through the Asteroid Day watch page and the official Asteroid Day YouTube channel. These pages also contain recordings from earlier programmes.
Broadcast start times are not fixed by the annual observance date. Check the listed time zone and convert it to local time before the stream begins. Local astronomy groups, universities and space agencies may run separate broadcasts with their own schedules.
Organizing a Local Asteroid Day Event
Schools, astronomy clubs, museums, universities and community groups can host an activity and submit it to the official calendar. The Asteroid Day website provides event-organizer information, educational materials and suggested activities.
Organizers can also use the official event registration form. Registering a listing does not mean the Asteroid Foundation funds or manages the local event; the host remains responsible for the venue, programme, permissions and attendee information.
World Asteroid Day Questions
Is World Asteroid Day the same as International Asteroid Day?
Yes. International Asteroid Day is the official United Nations name. Asteroid Day and World Asteroid Day are commonly used names for the same annual observance on June 30.
Why is Asteroid Day held on June 30?
June 30 marks the anniversary of the 1908 Tunguska event in Siberia. The observance uses that date to support public education about asteroids, near-Earth objects, impact hazards and international communication during a credible threat.
Is World Asteroid Day a public holiday?
No. It is an international observance, not a general public holiday. Schools, businesses and government offices normally follow their usual opening schedules unless local arrangements say otherwise.
Are all Asteroid Day events held on June 30?
No. The official observance is June 30, but registered events may take place on or around that date. Always use the date shown on the individual event page when planning a visit.
Do I need a telescope to take part?
No. Many activities are talks, workshops, classroom sessions, films or online broadcasts. Telescope access is only needed when a host specifically includes an observing session.
