The Morse code distress signal “SOS,” originating from Germany, became the world’s official message for help.
Source
King Louis I of Holland abdicated in favor of his son Napoléon Louis.
The first US postage stamps were issued.
The US aired its first-ever TV commercial.
The UK returned Hong Kong's control back to China after 156 years of British rule.
Sony's iconic Walkman first went on sale in Japan.
