## 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 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/date/leapyear.html

Feb 29, 2016 ... Roman general Julius Caesar introduced the first leap years over 2000 years ago. But the Julian calendar had only one rule: any year evenly ...

## Leap Year Explained - Infoplease

In 1582, Pope Gregory XIII adjusted the calendar by moving the date ahead by 11 days and by instituting the exception to the rule for leap years. This new rule ...

## 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.

## 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 ... If the rule is that leap years only fall on years divisible by four, as was the case for the millennium and a half before 1582, then the calendar ...

## 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 ...

## 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.

Popular Q&A
Q: What is the exception to the leap year rule?
A: If the century year is divisible by four it is not a leap year. Read More »