How is Asteroid Day calculated?

This event is observed every year on 30 June.

When is Asteroid Day 2025?

Name: Asteroid Day
Start: 2025-06-30
End: 2025-06-30
Location: Worldwide

Monday, 30 June 2025

Asteroid Day is an international awareness event held each year on 30 June to promote public understanding of asteroids, planetary defence, and the 1908 Tunguska event in Siberia.

Frequently asked questions

When is Asteroid Day 2025?: Asteroid Day 2025 is on Monday, 30 June 2025.
What day of the week is Asteroid Day 2025?: It falls on Monday.
How is Asteroid Day calculated?: This event is observed every year on 30 June.