1941 Ė World War II: U.S. President Franklin D. Roosevelt declares December 7 to be "a date which will live in infamy," after which the U.S. declares war on Japan
. The Presidential Address to Congress of December 8, 1941 (known as the Infamy Speech or Day of Infamy Speech) was delivered at 12:30 p.m. that day to a Joint Session of Congress by United States President Franklin D. Roosevelt, one day after the Empire of Japan's attack on Pearl Harbor Naval Base, Hawaii. The name derives from the first line of the speech: Roosevelt describing the previous day as "a date which will live in infamy." Within an hour of the speech, Congress passed a formal declaration of war against Japan and officially brought the U.S. into World War II. The address is regarded as one of the most famous American political speeches of the 20th century. photo of FDR delivering the speech to Congress. Behind him are Vice President Henry A. Wallace (left) and Speaker of the House Sam Rayburn. To the right, in uniform in front of Rayburn, is Roosevelt's son James, who escorted his father to the Capitol.