At 12 noon when he was President whether he took the oath of office or not - but this is really a discussion question. Personally watching him dance with his wife Michelle to "At Last" will always be a great point for me.
barack obamas
January 21,2013
Just found this site with info: http://newteevee.com/2009/01/14/where-to-watch-obamas-inauguration-online/
the south cobb band i think yes im sure
The Oath Ceremony will occur at the west steps of the U.S. Capitol.
Chief Justice John Roberts
several including my cousin
The famous person was Itzhak Perlman
http://bbc.com/obama at 1600 GMT (8 AM Pacific Time)
From 3:30 pm until approximately 7 pm.
It was said that more people watched that than the Super Bowl XLII. About 38 million people watched the inauguration. The record is 41.8 million held at Ronald Reagan's inauguration.
This is called the Inauguration , part of which is the "swearing in" of the President at which point he repeats the oath of office as required by the Constitution.