What day of the week was September 18, 1837?

The day of the week September 18th, 1837 fell on was a Monday.

Aires de Ornelas e Vasconcelos the Portuguese archbishop (d. 1880) was born on 18 September in 1837.

Tiffany and Co. (first named Tiffany & Young) is founded by Charles Lewis Tiffany and Teddy Young in New York City. The store is called a "stationery and fancy goods emporium".