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Leap year

en.wikipedia.org/wiki/Leap_year

A leap year is a year containing one additional day added to keep the calendar year ..... One reason for this rule is that Yom Kippur, the holiest day in the Hebrew calendar and the tenth day of the...

Leap Year Nearly Every four years - Timeanddate.com

www.timeanddate.com/date/leapyear.html

Feb 29, 2016 ... A leap year has 366 days, as opposed to a common year, which has 365. We add a leap day – February 29 – nearly every four years.

Leap Year 101 – Next, When, List, Days, Calendar, Years ...

www.infoplease.com/spot/leapyear2.html

Most years that can be divided evenly by 4 are leap years. (For example, 2016 divided by 4 = 504: Leap year!) 2. Exception: Century years are NOT leap years ...

Why do we have leap year? - Ask History - History.com

www.history.com/news/ask-history/why-do-we-have-leap-year

Feb 19, 2014 ... Nearly every four years, we add an extra day to the calendar in the form of February 29, also known as Leap Day. Put simply, these additiona...

2016 is a leap year | Earth | EarthSky

earthsky.org/earth/why-do-we-need-leap-years

Feb 29, 2016 ... The reason is that Earth takes approximately 365.25 days to orbit around the sun every year. It's that .25 that creates the need for a leap year ...

Leap Year Rules

www.wwu.edu/skywise/leapyear.html

There is a leap year every year whose number is perfectly divisible by four - except for years which are both divisible by 100 and not divisible by 400.

Leap Year: EnchantedLearning.com

www.enchantedlearning.com/time/leapyear/

Leap Year. Read about what a leap year is, why we have leap years, and how often we have a leap year.

Why is there a leap year? The science behind February 29 Leap ...

metro.co.uk/2016/02/26/the-science-behind-why-we-have-a-leap-year-every-four-years-5720043/

Feb 26, 2016 ... 2016 is a leap year, meaning we have one extra day on February 29, but ... why February drew the short straw, there's a (slightly unfair) reason.

Explainer: the science behind leap years and how they work

theconversation.com/explainer-the-science-behind-leap-years-and-how-they-work-54788

Feb 23, 2016 ... But this year, just like 2012, and the year four years before that, has 366. ... This error is part of the reason why we sometimes include leap ...

Leap Year -- from Eric Weisstein's World of Astronomy - ScienceWorld

scienceworld.wolfram.com/astronomy/LeapYear.html

A leap year is a year in which an extra day is added to the calendar in order to synchronize it with the seasons. Since the tropical year is 365.242190 days long,  ...

Answer
We have leap years in order to keep seasons, astronomical events, and time differences in sync.
Without leap years, the Gregorian calendar would lose veracity in just over a hundred years, leading to time differences between day and night.
More Info

Leap Year Explained - Infoplease

www.infoplease.com

A common year has 365 days and a leap year 366 days, with the extra, or intercalary, day designated as February 29. A leap year occurs every four years to ...

Leap Year 2016 February 29th - why is there an extra day every four ...

www.telegraph.co.uk

Mar 1, 2016 ... Leap Year 2016: Why does February have 29 days every four years? .... The extra second can sometimes cause problems for some networks ...

What is the main reason for leap year? - Quora

www.quora.com

Feb 29, 2016 ... TL;DR;. The simple reason for leap year is that the earth revolves around the sun in approximately 365.25 days, and so to make sure that a ...