Lame Duck
Amendment 20
The time between the election and inauguration.
The terms of the President and Vice President shall end at noon on the 20th day of January, and the terms of Senators and Representatives at noon on the 3d day of January, of the years in which such terms would have ended if this article had not been ratified; and the terms of their successors shall then begin.
Passed: January 23, 1933
It is important because it is when the President steps down and hands his position over to the next man in office.