Memorial Day was originally called Decoration Day. It’s a day of remembrance for those who have died serving in the US military.
Memorial Day was borne out of the Civil War (which ended in 1865) and a desire to honor our dead. On the 5th of May in 1868, General John Logan who was the national commander of the Grand Army of the republic, officially proclaimed it in his General Order No. 11.
“The 30th of May, 1868, is designated for the purpose of strewing with flowers, or otherwise decorating the graves of comrades who died in defense of their country during the late rebellion, and whose bodies now lie in almost every city, village and hamlet churchyard in the land.”