NOVEMBER 23: All swing states election results are certified by this date
DECEMBER 8: 'Safe harbor' deadline which means the statutory deadline for resolving disputed results. If the states have followed correct procedures, whatever the result is on Dec. 8 stands, even if one side still disputes it (emphasis mine)
DECEMBER 14: Electoral college electors are chosen and sworn in
JANUARY 5: Georgia run-off elections for two Senate seats, determining who controls the Senate
JANUARY 6: Congress certifies the Electoral College votes
JANUARY 20: At midday the new president is sworn in and assumes all of the powers of commander-in-chief - including the ability to direct the Secret Service and U.S. Marshals to remove unwanted White House guests