Followers celebrate the day by watching movies and talking to friends about the possibility of alien life among the stars.
The goal of World UFO Day is to raise awareness of UFOs and to have world governments declassify knowledge of alien life.
The United States is no stranger to UFO sightings. One of the most popular discussions surrounds the 1947 Roswell incident. In Roswell N.M., debris was discovered. Claims of alien bodies and spacecraft have long survived the incident. The Air Force says the crash was from experimental surveillance balloons.
Even Colorado has had its own UFO sighting in Breckenridge. 9NEWS mountain reporter Matt Renoux saw something hovering for as long as 15 minutes.
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