Final answer:
The 'Date of Infamy' refers to the attack on Pearl Harbor on December 7, 1941.
Step-by-step explanation:
The 'Date of Infamy' refers to the attack on Pearl Harbor by the Japanese on December 7, 1941. This event marked the entry of the United States into World War II. The National Park Service provides information and commemorates the significance of this day in American history.
Learn more about Pearl Harbor attack