A national strike began in the United States, calling for an eight-hour workday instead of 12 hours.
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Same-sex marriage was legalized in Sweden.
Crown Prince Naruhito became the Emperor of Japan following his father's abdication.
Construction started on Chicago's first-ever skyscraper for the Home Insurance Company of New York.
Geoffrey Hinton, the 'Godfather of AI,' resigned from Google amidst growing concerns over AI.
General Mills introduced Cheerios.
