What day of the week was September 17, 1940?

The day of the week September 17th, 1940 fell on was a Tuesday.

Lorella De Luca the Italian actress and director (d. 2014) was born on 17 September in 1940. As was Jan Eliasson the Swedish diplomat, 4th Deputy Secretary-General of the United Nations , Sotiris Moustakas the Cypriot-Greek actor (d. 2007) , Gilberto Parlotti the Italian motorcycle racer (d. 1972) .

World War II: Following the German defeat in the Battle of Britain the Hitler postpones Operation Sea Lion indefinitely.