Bataan Day, also known as 'Araw ng Kagitingan,' is a national holiday in the Philippines observed on April 9. This day commemorates the valor of Allied forces, particularly Filipino and American soldiers, during the siege of Bataan against Japan in World War II. After a three-month battle, 76,000 troops surrendered on April 9, leading to the infamous Bataan Death March, where prisoners endured a grueling 66-mile trek to a prison camp, resulting in the deaths of over 20,000 due to exhaustion and mistreatment. The holiday serves as a reminder of the sacrifices made during this pivotal moment in history and highlights the courage of those who fought despite overwhelming odds. Observances typically include memorial ceremonies, educational programs, and various civic activities to honor the heroes of Bataan.