The Confederate States of America adopts its Constitution, unanimously approved by the delegates. It will be in effect through the end of the Civil War. It differs from the U.S. Constitution in a number of crucial respects: it's more religious and it openly promotes the enslavement of blacks by whites.
First, it explicitly declares the dependence of the Confederacy on God whereas the U.S. Constitution is a secular document:
"We, the Deputies of the Sovereign and Independent States of South Carolina, Georgia, Florida, Alabama, Mississippi, and Louisiana, invoking the favor of Almighty God, do hereby, in behalf of these States, ordain and establish this Constitution for the Provisional Government of the same: to continue one year from the inauguration of the President, or until a permanent Constitution or Confederation between the said States shall be put in operation, whichsoever shall first occur."
Another key difference is that the defense of slavery is included in many places, for example:
"No bill of attainder, ex post facto law, or law denying or impairing the right of property in negro slaves shall be passed."
"The citizens of each State shall be entitled to all the privileges and immunities of citizens in the several States; and shall have the right of transit and sojourn in any State of this Confederacy, with their slaves and other property; and the right of property in said slaves shall not be thereby impaired."
"The Confederate States may acquire new territory... In all such territory, the institution of negro slavery as it now exists in the Confederate States, shall be recognized and protected by Congress, and by the territorial government: and the inhabitants of the several Confederate States and Territories, shall have the right to take to such territory any slaves lawfully held by them in any of the states or territories of the Confederate states."