The "Day of Infamy" speech, sometimes referred to as the Infamy speech, was a speech delivered by Franklin D. Roosevelt, the 32nd president of the United States, to a joint session of Congress on December 8, 1941. The previous day, the Empire of Japan attacked United States military bases at Pearl Harbor and the Philippines, and declared war on the United States and the British Empire. The speech is known for its famed first line, which opened with Roosevelt saying, "Yesterday, December 7, 1941—a date which will live in infamy..."
On Sunday, December 7, 1941, the United States Navy base at Pearl Harbor in the Territory of Hawaii was attacked by 353 Imperial Japanese Navy Air Service aircraft in a surprise military strike, destroying various American ships and aircraft, and killing over 2,400 civilians and military personnel. After consulting his cabinet, Roosevelt decided to deliver an address before the joint session of the Congress the next day.