Today, just before passing from 30th June to 1st July at midnight Greenwich Time clocks will count an extra second. Scientists argue that the one second difference has a combination of factors: from atomic clocks being a bit to fast to earth being slowed down a little because of the tidal pull of the moon. There won’t be the need for another leap second until the year 2016.
Adding one second every now and then is not a new practice. It has been done 25 times already and official timekeepers around the world who have been in charge with this until now are thinking of ways to remove this practice.