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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 synchronized with the astronomical or ...

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 ... Leap years are needed to keep our modern day Gregorian calendar in ...

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

www.infoplease.com/spot/leapyear2.html

Learn what leap year is, when it is and why we need it.

2016 is a leap year | Earth | EarthSky

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

Feb 29, 2016 ... We need leap years to help synchronize our calendar with Earth's orbit around the sun and the actual passing of the seasons.

Leap Year Rules

www.wwu.edu/skywise/leapyear.html

There is a leap year every year whose number is perfectly divisible by four - except ... If a leap day is added every fourth year, the average length of the calendar ...

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

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? ... The Roman calendar used to have 355 days with an extra 22-day ...

Leap Year 2012: Why We Need February 29

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

Feb 29, 2012 ... Find out why we need February 29, when leap day was adopted, and how cultures with other systems for tracking time handle their calendars.

2017 Leap Year Publishing Calendar & Calendars | CALENDARS ...

www.calendars.com/Leap-Year-Publishing/cat670064/

2016 Leap Year Publishing calendars at Calendars.com! Whether a wall, desk, or engagement, we have it with Leap Year Publishing.

2016 Is A Leap Year. Why Do We Have Them? - Forbes

www.forbes.com/sites/marshallshepherd/2016/01/04/2016-is-a-leap-year-why-do-we-have-them/

Jan 4, 2016 ... This year you may have also noticed that February 29th has made an appearance on your calendar. 2016 is a Leap Year. We all probably ...

Leap Year: EnchantedLearning.com

www.enchantedlearning.com/time/leapyear/

That is why we have a leap year roughly every 4 years, to synchronize the seasons with our calendar; if we had a 365-day calendar every year, the seasons  ...

Answer
Leap years almost always occur every four years, (i.e. in years that are divisible by 4). The only exceptions to this is that years that are evenly divisible by 100 are not leap years, unless they are also divisible by 400.
So this means that the years 1700, 1800, 1900, etc., were not leap years, but the year 2000 was, and the years 2400 and 2800 will be.
More Info

Next Leap Day: February 29, 2020 - TimeAndDate.com

www.timeanddate.com

Feb 29, 2016 ... A Leap Day, February 29, is added to the calendar during leap years. This extra day makes the year 366 days long – not 365 days, like a ...

When is Leap Year? When is the next Leap Day? | The Old Farmers ...

www.almanac.com

A “Leap” Day is an extra day on February 29 which is added nearly every 4 years to today's Gregorian calendar. A “leapling” is a person born in a leap year.

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

www.history.com

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...