Special Dates
Astronomy Day is an annual event held on Saturday between mid-April and mid-May on or just before the first quarter Moon. But apart from this day, there are some other special dates that are related to astronomy. Such as Galileo Day, International Asteroid Day, Earth Day, International Day of Human Space Flight, and more. Here you'll learn what astronomy-related events exist and how to celebrate them.
International Day of Planetariums: A Look Back at 101 Years of Celestial Exploration
Searching for a new leisure time activity? Visit your nearest planetarium! In today's article, you’ll find everything you need to know about space theaters.
April 24: Space Day of China
Explore Space Day of China 2026, its official theme, history, and major milestones in China’s space program.
Earth Day 2026: When Is the Earth’s Birthday?
As you explore the sky, remember that our Earth needs love, too. April 22 is Earth Day around the world, so let's use it to take care of our home planet!
Astronomy Day 2026: What It Is, When It Happens, and How to Celebrate
Discover what Astronomy Day is, when it's celebrated, how countries around the world observe it, and how you can join in — plus get a special stargazing gift! 🎁
April 12: Anniversary of the First Human Space Flight
Why is April 12 celebrated worldwide? Discover how Yuri Gagarin’s 1961 flight changed history, why the International Day of Human Space Flight matters, and how astronauts train today.
65th Anniversary of the First Human Space Flight
Explore the story of Yuri Gagarin’s historic spaceflight and another major event in space history that took place on April 12.
What Is Earth Hour? When Is Earth Hour 2026 and Why Do People Turn Off Lights?
What is Earth Hour? Learn the Earth Hour 2026 date and time, its meaning, who started it, and how it differs from Earth Day.
Messier Marathon 2026 Planner: The Observing Order That Saves Beginners Hours
Meet the Messier Marathon – a fun stargazing challenge! Discover how to find dazzling galaxies, star clusters, and nebulae in a single night. Are you ready to try?
Lunar New Year 2026: Year of the Fire Horse Starts With a “Ring of Fire”
When is Lunar New Year 2026?🐎🔥 Get the exact dates, Fire Horse zodiac meaning, key traditions, and what happens through the Lantern Festival.
What Galileo Galilei’s Famous For: His Accomplishments & Discoveries
Learn Galileo’s biggest discoveries: Venus phases, Jupiter’s moons, Moon mountains, and more — plus interesting facts and how to observe like Galileo on Galileo Day.