A survey was conducted and asked people what the most unproductive time of the day is for them. The average answer was 2:55pm.

The survey also found that 10:26am was the most productive.  Possibly because you are finally awake, finished checking e-mail, and ready to start doing what you are supposed to do for the day.

The Daily Mail also reports that the second most productive time of the day according to the survey was 4:16pm, when people are scrambling to get things done so they can leave at 5:00.