July 2 is World UFO Day commemorating the day in 1947 that a UFO supposedly crashed near Roswell, New Mexico.
It has been celebrated as UFO day since 2001. Its goal is to raise awareness of the Roswell findings and to gain support in forcing governments to “tell the truth about earthly visits from outer space aliens”.
World UFO Day has a collection of documentaries, if you care to learn more.
Disclaimer: The information on this website is accurate to the best of my knowledge at the time of writing. I make no guarantee as to its accuracy. Its purpose is to inform, educate, and raise awareness about causes and opportunities around the globe. I also encourage civil debate in the comments.