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   Warren G. Harding is elected President on March 4, 1921, and won with the largest majority vote to date at that point. Warren G. Harding is elected President on March 4, 1921, and won with the largest majority vote to date at that point.
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   President Harding suffered from a heart attack. His death was initially attributed to a cerebral hemorrhage, as doctors at the time did not generally understand the symptoms of cardiac arrest. President Harding suffered from a heart attack. His death was initially attributed to a cerebral hemorrhage, as doctors at the time did not generally understand the symptoms of cardiac arrest.
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   The national anthem was created from a poem written by Francis Scott Key in 1814, and was made into a song in 1931. The national anthem was created from a poem written by Francis Scott Key in 1814, and was made into a song in 1931.
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   Hattie Wyatt Caraway of Arkansas is the first woman elected to the U.S. Senate, to fill a vacancy caused by the death of her husband. Hattie Wyatt Caraway of Arkansas is the first woman elected to the U.S. Senate, to fill a vacancy caused by the death of her husband.
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   Sometimes called the "Lame Duck Amendment," the 20th Amendment was ratified on this date, and it moved the president's inauguration date from March 4 to January 20. Sometimes called the "Lame Duck Amendment," the 20th Amendment was ratified on this date, and it moved the president's inauguration date from March 4 to January 20.
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   This act established a system of old-age benefits for workers, benefits for victims of industrial accidents, unemployment insurance, aid for dependent mothers and children, the blind, and the physically handicapped. This act established a system of old-age benefits for workers, benefits for victims of industrial accidents, unemployment insurance, aid for dependent mothers and children, the blind, and the physically handicapped.
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   The Fair Labor Standards Act was passed on June 25, 1938, and it set the first minimum wage in the United States at 25 cents per hour. The Fair Labor Standards Act was passed on June 25, 1938, and it set the first minimum wage in the United States at 25 cents per hour.
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   The United States declared its neutrality in European conflict during World War II on this date. The United States declared its neutrality in European conflict during World War II on this date.
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   Japan launched a surprise attack on America in Hawaii, killing over 2,400 Americans. Japan launched a surprise attack on America in Hawaii, killing over 2,400 Americans.
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   President Wilson declared war on Japan the day after the attack on Pearl Harbor occurred. President Wilson declared war on Japan the day after the attack on Pearl Harbor occurred.