Question: World UFO Day is celebrated on the day an American aviator claimed to see nine unusual objects flying near where?
Sentence (from "World UFO Day"): June 24 is the date that aviator Kenneth Arnold reported what is generally considered to be the first widely reported unidentified flying object sighting in the United States, while July 2 commemorates the supposed UFO crash in the 1947 Roswell UFO Incident.
Relevant evidence: Yes