The New York Stock Exchange is not open on weekends. Stock Exchanges in America, Europe, and Asia follow the typical Monday to Friday schedule. However, in the Middle East the work week typically runs from Sunday through Thursday.
Thomas L. Jennings (1791 â February 12, 1856) was an African-American tradesman and abolitionist in New York City, New York. He operated and owned a tailoring and dry-cleaning business, and, on March 3,1821, he was granted patent 3306x for a dry scrub process as the first African American to be granted a patent.
Sources: Mary Bellis, Thomas Jennings: Thomas Jennings was the first African American to receive a patent, http://inventors.about.com/library/inventors/bljennings.htm; Joan Potter, African American Firsts (New York: Kensington Publishing Group, 2002).