How many weeks until Asteroid Day?

There are 3 weeks and 4 days until Asteroid Day.

How many hours until Asteroid Day?

There are approximately 600 hours until Asteroid Day.

Awareness Jun 29, 2026

How Many Days Until Asteroid Day?

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There are 25 days until Asteroid Day, which is 3 weeks and 4 days, or approximately 600 hours. That's 25 sleeps until Monday, June 29, 2026.

Asteroid Day is a United Nations-sanctioned global awareness campaign held every year on June 30th, marking the anniversary of the 1908 Tunguska event — the largest asteroid impact in recorded history, which flattened 2,200 square kilometres of Siberian forest. Co-founded in 2014 by Stephen Hawking, astronaut Rusty Schweickart, Queen guitarist and astrophysicist Brian May, and others, it brings together scientists, educators, and citizens to highlight the importance of planetary defence. Count down the days until Asteroid Day with our live countdown timer.

Full Countdown When Is Asteroid Day?