Space Exploration Day
Space Exploration Day, 7/20/2024, explore humanity's fascination with the cosmos, achievements in space travel, and the future of discovery. more >>
International Day of Human Space Flight
International Day of Human Space Flight, 4/12/2024: Honor humanity's space exploration achievements, milestones, and pioneers, sparking wonder and global unity. more >>
Extraterrestrial Culture Day
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Russian Cosmonaut Day
Russian Cosmonaut Day, 4/12/2025: Commemorating Russia's space exploration history and pioneers like Yuri Gagarin, with museum visits, lectures, and space-themed events. more >>
Pluto Day
Discover the fascinating world of Pluto on Pluto Day, February 18th, 2026, and explore its unique features, space exploration, and the wonders of our solar system. more >>
Pluto Demoted Day
Pluto Demoted Day, August 24, 2024: Discover the truth behind this non-existent holiday and learn about astronomy-related celebrations instead. more >>
Woman Astronomers Day
Woman Astronomers Day, 8/1/2024: Honoring pioneering women who broke barriers in astronomy, inspiring future generations to pursue STEM careers. more >>
Red Planet Day
Discover the truth about Red Planet Day on November 28, 2024. Could it be a lesser-known holiday or a mistake? more >>
Impossible Astronaut Day
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World UFO Day
World UFO Day, June 24, 2024: Explore the mystery of Unidentified Flying Objects, share experiences, and spark imagination about life beyond Earth. more >>
International Astrology Day
International Astrology Day, 3/20/2025: Explore the mysteries of the universe and our place within it with astrology enthusiasts and practitioners. more >>
Shooting Star Day
Shooting Star Day on 8/24/2024: Join the global stargazing party, make a wish, and experience the magic of meteor showers. more >>
Look Up at the Sky Day
Look Up at the Sky Day on 4/14/2025: Discover the magic above, reconnect with nature, and cultivate awe and gratitude. more >>
Astronomy Day
Join us on Astronomy Day, October 12, 2024, for stargazing sessions, lectures, and workshops that explore the wonders of the universe and inspire a sense of community and curiosity. more >>
International Asteroid Day
International Asteroid Day, June 30, 2024: Learn about asteroid detection, prevention, and international cooperation to protect our planet from celestial threats. more >>
First Contact Day
First Contact Day, 4/5/2025: Commemorating humanity's historic encounter with an alien civilization, a day of unity, cooperation, and intergalactic discovery. more >>
Carl Sagan Day
Carl Sagan Day, November 9, 2025: Honoring the legacy of a pioneering astronomer and science communicator, inspiring curiosity and critical thinking. more >>
Alien Day
Join the intergalactic fun on Alien Day, April 26, 2025, as fans of science fiction and space enthusiasts come together to explore the unknown. more >>
Perihelion Day
Perihelion Day, January 4, 2025: Discover the fascinating day when Earth is closest to the sun, learn about its orbit and the sun's impact on our climate and seasons. more >>
Moon Day
Join us on Moon Day, July 20, 2024, as we commemorate humanity's first steps on the lunar surface and gaze up at the night sky with wonder and awe. more >>
National Science Fiction Day
National Science Fiction Day, January 2, 2025: Explore the infinite possibilities of science fiction, discover new authors, and join fans worldwide in their love for the genre. more >>
Earth's Rotation Day
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Goddard Day
Discover the truth about Goddard Day on 3/16/2026. Is it a lesser-known holiday or a mistake? Learn more! more >>
Sally Ride Day
Sally Ride Day, May 26, 2025: Honor Dr. Sally Ride's legacy and inspire young minds to pursue STEM careers through educational activities and awards. more >>
National Clean Your Virtual Desktop Day
National Clean Your Virtual Desktop Day on 10/20/2025: Declutter your digital workspace, boost focus, and reduce stress. more >>
Alien Abduction Day
Alien Abduction Day on 3/20/2025: Is it a real holiday or just a myth? more >>