- mid-July - The USS Enterprise arrives in Earth's atmosphere after being subjected to a slingshot effect by a close encounter with a black star in 2267. They successfully return to their own time without interfering. (TOS: "Tomorrow is Yesterday")
- In an alternate timeline, the Enterprise accidentally destroys the aircraft of Major John Christopher and beams him aboard. The starship is classified as a UFO. While attempting to retrieve data evidence, Captain James Kirk gets captured and interrogated on the Omaha air force base. The Enterprise accidentally beams aboard another unwanted person, an Air Police sergeant. Finally, with a successful slingshot effect, they reverse their actions. (TOS: "Tomorrow is Yesterday")
- July 20th - The Earth spacecraft Apollo 11 lands on the Moon, recording Humanity's first steps on another world. (TOS: "Tomorrow is Yesterday"; VOY: "11:59", "Nightingale", "One Small Step")
- August 15th - Maury Ginsberg hitches a lift to the Woodstock music festival in New York on Earth. He notices that a cable connecting to the speaker system has come unplugged and reconnects it. If he had not noticed, the festival might have been a failure. He is not aware that the man who drives him there is the member of the Q Continuum later known as Quinn. (VOY: "Death Wish")
Community content is available under CC-BY-NC unless otherwise noted.