Memorial Day, which will be celebrated on May 31, 2021, is one of the most important American holidays. Observed annually on the last Monday of May, it honors the brave men and women of the US Army, Navy, Marine Corps, National Guard, Air Force, and the Coast Guard who sacrificed their lives to defend America's freedom. Meanwhile, Veterans Day, which takes place each year on November 11, honors all veterans — living or dead—but mainly gives thanks to living veterans who served their country honorably during war or peacetime.