International Moon Day is observed every year on July 20 to mark the anniversary of Apollo 11’s Moon landing in 1969, when Neil Armstrong and Buzz Aldrin became the first humans to walk on the lunar surface while Michael Collins remained in orbit. The day was officially recognized by the United Nations in 2021, making it a global observance that celebrates both the historic first landing and the peaceful exploration and use of outer space for all humanity. A fun Moon Day trivia fact: astronauts brought back about 21.5 kilograms of Moon rocks and soil from Apollo 11, helping scientists learn that the Moon is extremely dry and formed very early in the Solar System’s history.
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