1972 is the biggest year in history for that reason

The Dhaka Times Desk If the question can be asked, which is the longest year in the history of the world? Then you must be nervous. Because you don't know the answer. But from now on you can give the correct answer. 1972 is the greatest year in the history of the world.

Maybe you're thinking it might be a leap year. Leap years do not occur in any particular year. Leap years occur every four years. So the answer to the longest year must be no year with a leap year.

Actually the correct answer is 1972. Apart from being a leap year, it is the longest year ever for another reason. This year was two seconds longer than the annual average.

In 1972, the two second extra time was due to the leap second. So how the longest year is 1972?

It takes about 24 hours for the Earth to rotate around its axis. International time is determined based on it. There are 86,400 seconds in 24 hours. And it takes 365 days to go around the sun.

Day and night, tides and seasons also change depending on this rotation. But the speed of the earth is not always the same. This movement of the earth depends on many natural factors. Sometimes the speed of the earth increases slightly and sometimes it can decrease slightly. That is why events like tides and eruptions occur

From 1972, leap seconds started to be added. Leap seconds are added on June 30 and December 31. This extra second is called a leap second.

The International Earth Rotation and Reference Systems Service determines which year a leap second is added to the clock. They announce long in advance which year this leap second will be added.

A total of 27 leap seconds have been added from 1972 to 2021. Eg: From 1972 to 1979 leap second was added on 31 December However, no leap second was added in 1980. Then from 1981 to 1983 these two years were added on June 30.

Again like 1980 no leap second was added in 1984. Last added in 2016. Leap seconds were added several times between 1984 and 2016. No further leap seconds were added after 2016.

On December 31 of this year, the International Earth Rotation and Reference Systems Service can pre-announce the addition of leap seconds if deemed necessary.

However, many international organizations have also proposed to eliminate leap seconds. Because a second is added to the minute, many computers cannot control this extra time. Due to which many softwares have to face problems.

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