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Leap year - Wikipedia


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


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


Feb 28, 2011 ... Leap years are divisible by four of course – but it's a little more complicated ... The leap year rule that has been in place since 1582 is a bit more ...

Think Leap Year is Every Four Years? Think Again. | Huffington Post


Feb 29, 2016 ... Because for the most part, Leap Year is every four years. ... Well according to the rules of the Gregorian calendar, the exceptions to this rule are ...

Leap Years - Math is Fun


Leap Years are any year that can be evenly divided by 4 (such as 2012, 2016, etc). except if it ... So another rule says that every 400 years is a leap year again.

rules for leap year


However, this made the average length of the calendar-year slightly longer than ... Its rules are 1) years divisible by 400 ARE leap years (so, for example, 2000 ...

algorithm - leap year calculation - Stack Overflow


In general terms the algorithm for calculating a leap year is as follows... A year will be a leap ... For century years, the 400 rule is important. Thus ...

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


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 ...

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


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 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

Leap Year Nearly Every four years - 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 ...

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


Rules for Determining a Leap Year. 1. Most years that can be divided evenly by 4 are leap years. (For example, 2016 divided by 4 = 504: Leap year!) 2.

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


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 ...