What day of the week was May 12, 1863?

The day of the week May 12th, 1863 fell on was a Tuesday.

American Civil War: Battle of Raymond: Two divisions of James B. McPherson's XVII Corps (ACW) turn the left wing of Confederate General John C. Pemberton's defensive line on Fourteen Mile Creek the opening up the interior of Mississippi to the Union Army during the Vicksburg Campaign.