Veterans Day is a United States holiday dedicated to honoring all who have served in the U.S. Armed Forces, with a special emphasis on expressing gratitude for their service and sacrifices. It is observed annually on November 11 and has historical roots as Armistice Day, commemorating the end of World War I, before expanding to recognize veterans of all wars and conflicts. The day is typically marked by ceremonies, public acknowledgments, and various community and national activities to thank living veterans for their service.