Crown Prince Naruhito became the Emperor of Japan following his father’s abdication.
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A national strike began in the United States, calling for an eight-hour workday instead of 12 hours.
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.
Geoffrey Hinton, the 'Godfather of AI,' resigned from Google amidst growing concerns over AI.
Pluto was officially named.
