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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 ... By this rule, the average number of days per year is 365 + <sup>1</sup>⁄4 − <sup>...

## 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 Explained - Infoplease

This new rule, whereby a century year is a leap year only if divisible by 400, is the sole feature that distinguishes the Gregorian calendar from the Julian calendar ...

## When is a leap year not a leap year? | Science | The Guardian

www.theguardian.com/science/2011/feb/28/leap-year-alex-bellos

Feb 28, 2011 ... The following rule, devised recently by British maths brainiac Adam P Goucher, is much cleverer: years divisible by 128 are not a leap year, ...

## How could the year 2000 be a leap year when 1900 was not ...

science.howstuffworks.com/science-vs-myth/everyday-myths/question50.htm

Putting all of these rules together, you can see that a year is a leap year not only if it is divisible by 4 -- it also has to be divisible by 400 if it is a centurial year.

## LEAP YEAR FAQ

www.dpbsmith.com/leapyearfaq.txt

Q: Is the year 2000 a leap year? A: Yes, because the rule is: in the Gregorian calendar, leap years occur in years exactly divisible by four, except that years ...

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

www.almanac.com/content/when-next-leap-year

Find out the next Leap Day, how to calculate Leap Years, Leap Year folklore, and more on ... Here are the rules for leap year, just to set the record straight.

## Method to determine whether a year is a leap year - Microsoft

support.microsoft.com/en-us/kb/214019

Any year that is evenly divisible by 4 is a leap year: for example, 1988, 1992, and ... only the year 1900 is subject to the 100/400 exclusion rule of leap years in ...

## 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 added rule about centuries (versus just every four years) was an ...

## 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 ... The extra rule involving centuries is an additional correction to make up for the ...

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.

### Leap Year Nearly Every four years - Timeanddate.com

www.timeanddate.com

Feb 29, 2016 ... A leap year has 366 days, as opposed to a common year, which has 365. ... But the Julian calendar had only one rule: any year evenly divisible ...