The Mesoamerican Long Count Calendar, most famously used by the Maya civilisation, began.
30th September 1935: The Hoover Dam is dedicated by Franklin D. Roosevelt
30th September 2020
11th November 1918: WW1 Armistice of Compiègne is signed
11th November 2018
9th November 1989: East Germany opens the Berlin Wall
9th November 2019
1st September 1939: Nazi Germany invades Poland
1st September 2018