Big Day, originally titled A Day in the Life, is an American television sitcom that first aired on ABC from November 28, 2006, to January 30, 2007. The series was co-produced by Josh Goldsmith and Cathy Yuspa and directed by Michael Spiller. The story arc has similarities to the 2004–2006 BBC series The Worst Week of My Life, which has also been the subject of a FOX pilot (2005), and the CBS sitcom Worst Week (2008)