Internal Why we celebrate Memorial Day The holiday has certainly evolved since it was conceived roughly 150 years ago. By Kevin J. AllenMay 28, 2013 SHARE Ragan Insider Premium Content Memorial Day has its roots in post-Civil War Waterloo, New York, which is credited with holding the first official Memorial Day commemoration. To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.