What day of the week was October 9, 1581?

The day of the week October 9th, 1581 fell on was a Friday.

Claude Gaspard Bachet de Méziriac the French mathematician, poet, and scholar (d. 1638) was born on 09 October in 1581.

Louis Bertrand the Spanish missionary and saint (b. 1526) died on this day in 1581.