100% verified The same day, three eras.
4 October
Contemporary era
1957
Launch of Sputnik 1
On 4 October 1957, the USSR launched Sputnik 1, the first artificial satellite.
Sources and verification (1)
- Encyclopaedia Spoutnik 1 (Wikipedia) Wikipedia. 4/5
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Contemporary era
1883
First Orient Express
On 4 October 1883, the first Orient Express linked Paris to Constantinople.
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- Encyclopaedia Orient-Express (Wikipedia) Wikipedia. 4/5
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From the Middle Ages to the Enlightenment
1582
Gregorian calendar adopted
On 4 October 1582, the Gregorian calendar was adopted; the next day became 15 October.
Sources and verification (1)
- Encyclopaedia Calendrier gregorien (Wikipedia) Wikipedia. 4/5