What day of the week was September 16, 1980?

The day of the week September 16th, 1980 fell on was a Tuesday.

Patrik Štefan the Czech ice hockey player was born on 16 September in 1980.

Jean Piaget the Swiss psychologist and philosopher (b. 1896) died on this day in 1980.

Saint Vincent and the Grenadines join the United Nations.