Emancipation Day would have to fall on a significantly different day.
Slavery existed in the United States at least until December 31st of 1865 and probably a couple of months longer in some isolated pockets. There was known to be a slave auction in Kentucky as late as November 1865.
Nobody knows for certain the day the last slave walked free.
But December 31st, 1865 is probably the date by which 99.99% were free.
National Military Appreciation Month, also known as Military Appreciation Month, is a month-long observance recognized in the United States, dedicated to people who are currently in the military or have resigned from duty. Each year, the observance runs from May 1 to May 31.