I've been Grilled

Sunday, January 17, 2016

This is Leap Year!!!!  

Illustration image
Leap years have 366 days, not 365.

When Is the Next Leap Year?

Next leap day is February 29, 2016.

Why Add Leap Years?

Leap years are needed to keep our modern dayGregorian calendar in alignment with the Earth's revolutions around the sun.
It takes the Earth approximately 365.242189 days – or 365 days, 5 hours, 48 minutes, and 45 seconds – to circle once around the Sun. This is called atropical year.
However, the Gregorian calendar has only 365 days in a year, so if we didn't add a leap day on February 29 nearly every four years, we would lose almost six hours off our calendar every year. After only 100 years, our calendar would be off by around 24 days!

Is There a Perfect Calendar?

Exactly Which Years Are Leap Years?

We add a Leap Day on February 29, almost every four years. The leap day is an extra, or intercalary, day and we add it to the shortest month of the year, February.
In the Gregorian calendar three criteria must be taken into account to identify leap years:
  • The year can be evenly divided by 4;
  • If the year can be evenly divided by 100, it is NOT a leap year, unless;
  • The year is also evenly divisible by 400. Then it is a leap year.
This means that in the Gregorian calendar, the years 2000 and 2400 are leap years, while 1800,1900210022002300 and 2500 are NOT leap years.