International Asteroid Day: 30 June
- The International Asteroid Day, also known as Asteroid Day is a United Nations proclaimed day observed globally on June 30 ever year to raise awareness about asteroids and what can be done to protect the Earth, its families, communities, and future generations from a catastrophic event.
- The event marks the anniversary of the Siberian Tunguska event that took place on June 30, 1908, and was the most harmful known asteroid-related event on Earth in recent history.
- The first International Asteroid Day was held in 2015.