What day of the week was July 25, 1866?

The day of the week July 25th, 1866 fell on was a Wednesday.

Floride Calhoun the American wife of John C. Calhoun, 4th Second Lady of the United States (b. 1792) died on this day in 1866.

The United States Congress passes legislation authorizing the rank of General of the Army. Lieutenant General Ulysses S. Grant becomes the first to be promoted to this rank.