Here's a breakdown:
* 1961: The first contracts for the Apollo program were awarded.
* 1962: The first Apollo Command and Service Modules were built.
* 1966: The first uncrewed Apollo mission (AS-201) launched.
* 1967: The Apollo 1 fire tragically killed three astronauts during a launch pad test.
* 1968: The first crewed Apollo mission (Apollo 7) launched, testing the Command and Service Modules in Earth orbit.
* 1969: Apollo 11 landed on the Moon, and the first humans walked on its surface.
* 1972: The last crewed lunar landing mission, Apollo 17, took place.
* 1973: The last Apollo mission, Apollo 17, returned to Earth, marking the end of the Apollo program.
So, while there isn't a single definitive "built" date, the Apollo spacecraft's development and construction spanned over a decade.
