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en.wikipedia.org/wiki/Leap_year

A leap year is a calendar year containing one additional day added to keep the calendar year ... In the Baha'i Calendar, a leap day is added when needed to ensure that the following year begins on the vernal equinox. The name "leap ... The Gregorian reform modified the Julian calendar's scheme of leap years as follows:.

www.timeanddate.com/date/leapyear.html

Feb 29, 2016 ... We add a leap day – February 29 – nearly every four years. ... Leap years are needed to keep our modern day Gregorian calendar in alignment ...

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...

blogs.discovermagazine.com/badastronomy/2008/02/28/why-we-have-leap-days

Feb 28, 2008 ... (25 leap years x 366 days/leap year) + (75 years x 365 days/year) ..... an 8th Century Roman King, who decided that the calendar needed to be ...

www.infoplease.com/leap-year-explained

The Gregorian calendar, which now serves as the standard calendar for civil use throughout the world, has both common years and leap years. A common year ...

www.npr.org/templates/story/story.php?storyId=87803957

Feb 29, 2008 ... The adjustment is needed because the actual time between two ... Of course, since it's not quite one full day, the rules for leap years are a little ...

news.nationalgeographic.com/news/2012/02/120229-leap-year-day-february-29-calendar-cultures-science

Feb 29, 2012 ... Leap Year Needed to Correct Calendar Drift ... Egypt adopted a leap-year system , with an extra day every four years, during the Greek rule of ...

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 do we actually have leap years, and what is the science behind ...

www.getreading.co.uk/whats-on/whats-on-news/leap-years-women-propose-them-10849433

Feb 6, 2016 ... Here's all you need to know about why we have leap years, the origins of them and why women choose to propose on them.

www.telegraph.co.uk/news/uknews/12177017/Leap-Year-2016-Why-does-February-have-29-days-every-four-years.html

Mar 1, 2016 ... Leap Year 2016: Why does February have 29 days every four years? ... and everything else you need to know about the leap year in 2016 ...