After a hundred years, people began to refer to the Space Age, and the day when the first of the clever apes from the planet below set his post-prehensile paw on his planet's satellite was widely regarded to be the beginning of that Age. (Even though that tribe retreated soon after)Wikipedia from the Future: Why July 20th is so cool!
And from Wikipedia of Today
The Apollo 11 mission was the first manned mission to land on the Moon. It was the fifth human spaceflight of Project Apollo and the third human voyage to the Moon. Launched on July 16, 1969, it carried Commander Neil Alden Armstrong, Command Module Pilot Michael Collins and Lunar Module Pilot Edwin Eugene 'Buzz' Aldrin, Jr. On July 20, Armstrong and Aldrin became the first humans to land on the Moon, while Collins orbited above.