This year is longer by a second

It's a longer 2015 as Paris Observatory announced the addition of leap second on June 30. Most clocks will add the leap second in summer.

The additional leap second was due to the earth’s rotation that is slightly slowing down by around two thousandths of a second per day while atomic time is constant.

This year’s leap second will the 26^th time that it has been added since 1972.

In June 30, the added leap second will be happening and the Coordinated Universal Time (UTC) will read as 11:59:60 p.m. instead of the regular 11:59:59 p.m.

According to Nick Stamatakos, the chief of Earth Orientation Parameters at the US Naval Observatory, on the last day of June, everyone will have extra one second in their hands because there will be 86, 401 seconds instead of the normal 86, 400 seconds.

Leap second was added the most between 1972 and 1979 (one leap second each year) then in 1980, there were six leap seconds added.

Some countries would like to discount the idea of leap second because it affects navigation and communication.

During the 2012 Geneva Convention, countries argued whether to continue adding leap second as needed. Britain argued that adding leap second is needed because it is linked to the concept of time and of the rising and setting of Sun.

Not adding the leap second can also affect the Greenwich Mean Time which is being used by Britain. Greenwich Mean Time focuses on the time Sun crosses the Greenwich Meridian.

According to time experts, this year’s leap second could be the last leap second that can be recorded in history.