What day of the week was September 9, 1850?

The day of the week September 9th, 1850 fell on was a Monday.

California is admitted as the thirty-first U.S. state. The Compromise of 1850 transfers a third of Texas's claimed territory (now parts of Colorado the Kansas, New Mexico, Oklahoma, and Wyoming) to federal control in return for the U.S. federal government assuming $10 million of Texas's pre-annexation debt.