Every second counts?

It appears that leap years aren't enough, because now we're dealing with leap seconds:

Along with the economy, the Earth itself is slowing down, requiring timekeepers to add an extra second to their atomic clocks to keep in sync with Earth's slightly slowing rotation. So an extra second will be tacked on to Dec. 31 after 6:59:59 p.m. and before 7 p.m. Eastern Standard Time.

This is actually the first I've ever heard of such a scheme, though apparently it started being implemented sporadically in 1972. Somehow I doubt a lot of people are going to take notice of this, because it's not as noticeable as, say, turning the clocks ahead an hour.