Pearl Harbor Remembrance Day is observed on December 7 in the United States to honor the victims and survivors of the Japanese surprise attack on Pearl Harbor, Hawaii, on December 7, 1941, which led to the United States' entry into World War II. This day serves as a reminder of the sacrifices made by the brave men and women who fought during the war and the importance of maintaining peace and freedom worldwide. Many people attend ceremonies and events, and the American flag is flown at half-staff to honor those who lost their lives in the attack.