According to PanARMENIAN.Net,  July 2 marks World UFO Day dedicated to the existence of Unidentified Flying Objects. The first World UFO Day was celebrated in 2001.
This day is used to encourage governments to declassify their knowledge about sightings throughout the history. Many governments are believed to have gained exclusive information about UFO’s through their military departments.
A subject that still raises a lot of curiosity is the Roswell incident in 1947 when a believed UFO crashed in Roswell New Mexico, Conscious Life News said.
An unidentified flying object, often abbreviated UFO or U.F.O., is an unusual apparent anomaly in the sky that is not readily identifiable to the observer as any known object, often associated with extraterrestrial life.
Studies have established that the majority of UFO observations are misidentified conventional objects or natural phenomena—most commonly aircraft, balloons, noctilucent clouds, nacreous clouds, or astronomical objects such as meteors or bright planets with a small percentage even being hoaxes.
After excluding incorrect reports, however, most investigators have acknowledged that between 5% and 20% of reported sightings remain unexplained, and therefore can be classified as unidentified in the strictest sense. Many reports have been made by such trained observers as pilots, police, and the military; some have involved simultaneous radar tracking and visual accounts. Proponents of the extraterrestrial hypothesis suggest that these unexplained reports are of alien spacecraft, though various other hypotheses have been proposed.