This past Friday was March 4th, the 78th anniversary of FDR’s First Inauguration in 1933.  FDR was the last president sworn in on March 4th because the 20th Amendment to the Constitution, which was ratified on January 23, 1933, changed inauguration date from March 4 to January 20.  But the amendment did not take effect until October 1933.  So when FDR was re-elected in 1936 and inaugurated in 1937, he also became the first president sworn into office on January 20th!