National Pearl Harbor Remembrance Day, also referred to as Pearl Harbor Remembrance Day or Pearl Harbor Day, is observed annually in the United States on December 7, to remember and honor the 2,403 citizens of the United States who were killed in the Japanese surprise attack on Pearl Harbor in Hawaii on December 7, 1941.
On August 23, 1994, the Pub.L. 103–308, 108 1169, designated December 7 of each year as National Pearl Harbor Remembrance Day. On November 29, President Bill Clinton issued a proclamation declaring December 7, 1994, the first National Pearl Harbor Remembrance Day. It became § 129 (Patriotic and National Observances and Ceremonies) of the United States Code.
On Pearl Harbor Day, the American flag should be flown at half-staff until sunset to honor those who died as a result of the attack on U.S. military forces in Hawaii. Pearl Harbor Day is not a federal holiday – government offices, schools, and businesses do not close. Some organizations may hold special events in memory of those killed or injured at Pearl Harbor.
Canada declared war on Japan within hours of the attack on Pearl Harbor, the first Western nation to do so. On December 8, the United States declared war on Japan and entered World War II on the side of the Allies. In a speech to Congress, President Franklin D. Roosevelt called the bombing of Pearl Harbor "a date which will live in infamy."