February 28, 2012

Happy Leap Year

Do you know why we have a leap year?


To be truthfully honest I think I know why every four years. 
I found this to help explain.  

Why do we need Leap Years?


Leap Years are needed to keep our calendar in alignment with the Earth's revolutions around the sun. It takes the Earth approximately 365.242199 days – or 365 days, 5 hours, 48 minutes, and 46 seconds (a tropical year) – to circle once around the Sun.
***Secret word for a big fuzzy- Leap Year*** (children have until March 2nd to tell me the secret word)
Tropical year
Note: The illustration is not to scale.
However, the Gregorian calendar has only 365 days in a year, so if we didn't add a day on February 29 nearly every 4 years, we would lose almost six hours off our calendar every year. After only 100 years, our calendar would be off by approximately 24 days!
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Could you imagine having your birthday on Leap year.  If you were in first grade you would be 2 years old tomorrow! Just thought I would give you a little lesson and hope that the secret word works for our kiddo's.

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