Happy Leap Year

Did you know that leap year isn't just every four years? The following three criteria determine which years will be leap years:

• Every year that is divisible by four is a leap year;
• of those years, if it can be divided by 100, it is NOT a leap year, unless
• 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.

It is interesting to note that 2000 was somewhat special as it was the first instance when the third criterion was used in most parts of the world.

Leap years are needed to keep our calendar in alignment with the earth's revolutions around the sun.

Source www.timeanddate.com/date/leapyear.html