World UFO Day is an awareness day for people to get together and watch the skies for unidentified flying objects. July 2nd commemorates the supposed UFO crash in the Roswell Incident in 1947. The goal of the July 2nd celebration 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”.
An unidentified flying object, or UFO, in its most general definition, is any apparent anomaly in the sky that is not readily identifiable as any known object or phenomenon by visual observation and/or use of associated instrumentation such as radar. These anomalies were referred to popularly as “flying saucers” during the late 1940s and early 1950s. (material from: Wikipedia and www.cute-calendar.com)