Memorial Day, observed on the last Monday of May, is a significant federal holiday in the United States dedicated to honoring and remembering the military personnel who have died in the line of duty. Originally known as Decoration Day, it was established in the aftermath of the Civil War to commemorate the Union and Confederate soldiers who had perished. Over time, it expanded to honor all American military members who have sacrificed their lives. Traditions include visiting cemeteries and memorials, where people often place flags and flowers on graves, participating in parades, and holding family gatherings. The holiday also signifies the unofficial start of summer, marked by community events and barbecues. Memorial Day serves as a poignant reminder of the cost of freedom and the bravery of those who have fought to protect it.