2026-06-21 Summer Solstice Summer Solstice 21 Jun 2026 Summer Solstice The summer solstice is the day when the Sun appears to reach its highest point in the sky during the year - it marks the start of summer in the Northern Hemisphere.
2026-06-30 International Asteroid Day International Asteroid Day 30 Jun 2026 International Asteroid Day International Asteroid Day is a United Nations-recognized day observed each year on the anniversary of the Tunguska impact event of June 30, 1908.