- Did you know that Memorial Day was originally known as Decoration Day, a time when Americans remembered those who died during the Civil War? As Memorial Day approaches, find out more fun facts from Share My Lesson’s curated collection with free K-12 resources and new ways to discover the meaning of Memorial Day for educators, parents and anyone interested in learning more about the history of this holiday. The lessons and activities honor military men and women who died while on duty and explore the wars they served in, as well as the impact on their families and our country.