Originally Posted by Furienna
Okay... But then I wonder why it was changed.
The 20th amendment was also called the "Lame duck" amendment, "lame duck" referring to members of congress (or the president) who are officially on their way out (following the election) but are still in office. They may have lost the election or their term limit could be up. Having the transfer happen in January rather than March reduced the time for them to just sit around awkwardly knowing their days are numbered.