Congress banned polygamy, stating that those who are caught are to be punished.
Source
King Louis I of Holland abdicated in favor of his son Napoléon Louis.
The Morse code distress signal 'SOS,' originating from Germany, became the world's official message for help.
The Motion Picture Association of America introduced the PG-13 film rating.
The US aired its first-ever TV commercial.
The UK returned Hong Kong's control back to China after 156 years of British rule.
