“Why do we have leap years?
A leap year, where an extra day is added to the end of February every four years, is down to the solar system’s disparity with the Gregorian calendar.
A complete orbit of the earth around the sun takes exactly 365.2422 days to complete, but the Gregorian calendar uses 365 days.
So leap seconds – and leap years – are added as means of keeping our clocks (and calendars) in sync with the Earth and its seasons.” -www.telegraph.co.uk
To know more about leap year read the article below:
http://http://www.telegraph.co.uk/news/uknews/12177017/Leap-Year-2016-Why-does-February-have-29-days-every-four-years.html
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