Passage: On 12 January 2007, President Iajuddin Ahmed swore him in as Chief Adviser to the Interim Caretaker Government, after the former interim government under the President was dissolved. Fakhruddin Ahmed is credited with bringing an end to the anarchy that had threatened to sweep the troubled nation. In a country widely perceived as one of the world's most corrupt, Ahmed stressed an anti-graft campaign against the establishment during his tenure.

Question: When was the President sworn in?
12 January 2007