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Friday, February 29, 2008

胜's画 no.43

What is a leap year?

A leap year is a year in which one extra day has been inserted, or intercalated, at the end of February. A leap year consists of 366 days, whereas other years, called common years, have 365 days.

Which years are leap years?

In the Gregorian calendar, the calendar used by most modern countries, the following three criteria determine which years will be leap years:

  1. Every year that is divisible by four is a leap year;
  2. of those years, if it can be divided by 100, it is NOT a leap year, unless
  3. the year is divisible by 400. Then it is a leap year.

According to the above criteria, that means that years 1800, 1900, 2100, 2200, 2300 and 2500 are NOT leap years, while year 2000 and 2400 are leap years.



disappointed with our police force... Zzz =(
stay calm & look out for him and if there is any information of anyone that looks like him, report the case to the police... that's wat we can help... hope will be over soon.


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