What year did the US declare war on Germany during World War 2?

December 11, 1941 ....Four days after the Japanese attack on Pearl Harbor. President Roosevelt claimed that it was indicative of Germany's goals of world domination. However, the truth is that Germany's inner circle felt that its declaration of war on the U.S. would prompt Japan to invade the Soviet Union from the east. Consequently, the Soviets would have a war on two fronts which would relieve the German Army on the Soviet-German front. Suffice to say, the Japanese had other plans resulting in Germany making a serious mistake when it declared war on the U.S.