Such an occurrence, however, has not been repeated since.[16] In 1934, Rush D. Holt Sr. was elected to the Senate at the age of 29; he waited until he turned 30 (on the next June 19) to take the oath of office. In November 1972, Joe Biden was elected to the Senate at the age of 29, but he reached his 30th birthday before the swearing-in ceremony for incoming senators in January 1973.