The leap year has 366 days and it forms by adding an extra day to the month of February. That means, the February month in a leap year includes 29 days.
According to a Babylonian record “Enuma eleef” which was written in “akkadi” language in B.Cs, a person called Marshook who considered to be a god, initiated it.
History
The necessity of a calender came into existence in 776 B.C. So they designed a calender depending on Pythagoras's discovery of earth's rotation around it's own axis, Aristarchus's theory of earth's perambulation around the sun, Hisarchus's Star map and the spill-over of Nile river.
This calender had 12 months, just like the one which we are using right know. It differed in some cases but the revisions which made in the past righted the defects in it. The primus revision, called “Warkdonious” added some extra days to the february. After that the emperor Julius Caesar identified the deficiency of 80 days comparing it with the progression of Sun and mended it. The calender that they used by then, contained two months in the December. So it considered to be the longest year in the past. It was the initiation of the “Julian” calender.
The “Julian” calender had had 366 days once in every four years. Unlike the modern calender, they added that extra date by duplicating the 24th of February. By then, they realized that once in every 128 years it carries over a one day. So the great philosopher Roger Bacon apprised the 4th Urban Pope about the circumstance and then 13th Gregory pope referred it to the Christopher Clavius, a synchronous astronomer . The people around the world protested against it, considering any deduction like this may lessen the life time of their own. How ever the leap year came into existence. It was adopted by an enactment established by the baron Test Field. In that enactment, they resolved the leap year which formed by adding an extra day at the end of February.
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