The Vought-Sikorsky VS-300 became the first successful helicopter to fly.
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The IBM 305 RAMAC commercial computer was announced to the public.
Hindi became the official language of India.
Britain skipped 11 days of the Calendar from September 3 to September 13, with the adoption of the Gregorian calendar starting on this day.
Boston Light was illuminated for the first time.
The Ottoman Empire signed the Treaty of Adrianople with Russia, which ended the Russo-Turkish War.
