Due to constitutional scheduling, President Obama will become the second president in U.S. history to have four swearing-in ceremonies.
Obama will take the oath of office for a second term in a small, private White House ceremony on Sunday, Jan. 20, the constitutionally mandated date for the inauguration. The next day, he will do it all over again in front of the public on steps of the Capitol.
Obama was sworn in twice in 2008 out of an abundance of caution after Chief Justice John Roberts flubbed the oath of office.
Franklin Roosevelt was also sworn-in four times but, unlike Obama, he was elected four times.
This year will mark the seventh time a president has taken the oath on a Sunday and then again on Monday for ceremonial purposes. Reagan last took the oath on a Sunday in 1985.
Here is video of Obama's first swearing in by Roberts:
And Here is audio of Roberts administering the oath for a second time in 2009: