Leap Year 2016: Why does February have 29 days every four years?

                                                     
                                                       Source:telegraph.co.uk

Telegraph.co.uk‎-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.

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So leap seconds - and leap years - are added as means of keeping our clocks (and calendars) in sync with the Earth and its seasons.

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