Inauguration of the railway bridge over the Daugava river in Riga
Inauguration is a ceremony marking the beginning of a politician taking office or the opening of, for example, a bridge.
When a politician, for example a President, takes office, he may make an oath in front of an audience as part of the inauguration ceremony.
The Inauguration of the President of the United States takes place on January 20 in the year after an election. The present president of the United States, Barack Obama was inaugurated on January 20, 2009.