SPACE.com -- 2009 to Arrive Not a Second Too Soon
You'll have to wait a bit longer than last year for the New Year to arrive... 1 second to be exact. a Leap Second will be added to 2009 to let Earth, which has been falling behind the atomic clocks by about 2 milliseconds each day, to catch up to the more accurate atomic clocks. The last Leap Second was added three years ago.