How is Asteroid Day calculated?

This event is observed every year on 30 June.

When is Asteroid Day 1999?

Name: Asteroid Day
Start: 1999-06-30
End: 1999-06-30
Location: Worldwide

Wednesday, 30 June 1999

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 1999?: Asteroid Day 1999 is on Wednesday, 30 June 1999.
What day of the week is Asteroid Day 1999?: It falls on Wednesday.
How is Asteroid Day calculated?: This event is observed every year on 30 June.