Not really it was after the Battle of Antietam or Battle of Sharpsburg which was fought on September 17, 1862. The announcement was made by President Lincoln on September 22, 1862 five days after the battle. It emancipated was all slaves in states still engaged in rebellion against the Union. Although implementation was strictly beyond Lincoln’s powers, the declaration turned the war into a crusade against slavery. It went into effect on January 1, 1863.
No…didn’t you hear the news? It was Juneteenth when the slaves were freed. It was in all the papers this year. It’ll be a federal holiday next year.
The London Spectator mentioned at the time that the message given by Lincoln's actions was not that one man could not own another. He could only own another man if he was loyal to the Union.