Despite running out of oxygen, Jim Whittaker became the first American to reach the summit of Mount Everest.
Source
Same-sex marriage was legalized in Sweden.
Mr. Potato Head was officially released, originally only consisting of the accessories which were stuck in an actual potato.
Fidel Castro banned elections and declared Cuba to be a socialist nation.
A national strike began in the United States, calling for an eight-hour workday instead of 12 hours.
Pluto was officially named.