1582CE
Science
Gregorian calendar adopted
Pope Gregory XIII introduces the Gregorian calendar to replace the Julian calendar, requiring the removal of 10 days to correct dates.
Daily Chronicle
October 15
3 Historical Records
1844CE
Birth
Friedrich Nietzsche Born
German philosopher whose radical ideas on morality, religion, and culture, including the concept of the 'Übermensch,' profoundly influenced 20th-century thought.
1990CE
Politics
Gorbachev wins Nobel Peace Prize
Soviet leader Mikhail Gorbachev is awarded the Nobel Peace Prize for his role in ending the Cold War.