Prior to the passing of the 20th Amendment to the U.S. Constitution, the inauguration of the President occurred on March 4th, not on January 20th. When Zachary Taylor was to be sworn in as President on March 4, 1849, Inauguration Day fell on a Sunday. However, Taylor refused to be sworn in on the Sabbath. This led to the ratification of the 20th Amendment, moving the inauguration to January 20th, and it was duly noted that if the 20th was a Sunday, the inauguration would take place on the 21st instead. Taylor would go on to only serve fifteen months in office, becoming the second President to die during his term.
