US Armed Forces Day is observed annually on the third Saturday of May as a day to honor the men and women serving in the U.S. military. It serves as a time of national pride and appreciation for the bravery and sacrifices of military personnel. Celebrations often include parades, military displays, and educational exhibits at military museums, providing opportunities for Americans to learn about military history and achievements. People are encouraged to express gratitude by writing thank-you letters to active-duty service members, supporting military-related social media campaigns, or hosting military-themed movie nights. Additionally, wearing patriotic clothing and volunteering for veteran causes are common ways to show support. The day was established by President Harry S. Truman to unify the celebration of all military branches following the creation of the Department of Defense.