On this day

Via: ENCYCLOPÆDIA BRITANNICA

1789
The U.S. Constitution went into effect as the governing law of the United States, the date having been established by Congress.
1933
Inauguration of U.S. President Franklin D. Roosevelt, in the midst of the Great DepressionFranklin D. Roosevelt was inaugurated as the 32nd U.S. president, and later he led the country out of the Depression and to victory in World War II.