One more second will be added to the New Year's countdown on Saturday.

The International Earth Rotation and Reference Systems Service(IERS) says a leap second will be added to the world's clocks just before the start of 2017.

Accordingly, an extra second will be created after 23 hours, 59 minutes and 59 seconds Coordinated Universal Time(UTC) on December 31st, 2016.

In South Korean time, however, the leap second will be reflected after the 59th second of the 59th minute of the eighth hour on Sunday.

A leap second is added to correct minor discrepancies between Universal Time, which is defined by the Earth's rotation, and International Atomic Time determined by atomic clocks created by humans.

There have been 27 leap seconds added since 1972 so far, the latest time occurring between June and July of last year.