Leap Year is NOT every 4 years. - The Horse Forum
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post #1 of 10 Old 02-21-2012, 11:49 AM Thread Starter
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Leap Year is NOT every 4 years.

Because the earth doesn't take exactly 365 days to orbit the sun...it takes about 365.25 days....so since the beginning of our Gregorian calender era (circa: 1582) it would throw the seasons off if we didn't account for it. Basically this is how it works: Every four years we add an extra day to February to keep in alignment with the "solar" year; which is how long it really takes the earth to orbit the sun.

However, if we did this every four years we would still screw it up so they devised some exceptions to the rule of four. Years that are divisible by 100 are not leap years, even if they are four years from the previous leap year unless the year is also divisible by 400. The years 1600 and 2000 were leap years but the years 1700, 1800 and 1900 were not. Follow? It's okay to be confused......the people who devised this genius plan were so confused that they had to skip 10 days in the month of October in the year 1582. It's true...nobody was born or died between Oct.5th, 1582 and Oct. 14th, 1582. Those days just don't exist.
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post #2 of 10 Old 02-21-2012, 11:55 AM
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Bill, you have way too much time on your hands..How in the world did you figure that out? History Channel? It is pretty neat, I'll admit, but a little strange too..
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post #3 of 10 Old 02-21-2012, 11:55 AM
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Okay I'm confused... How do you know no one was born or died between october 5 and 14, 1852? That sounds kind of far fetched to me, though I guess it is possible...
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post #4 of 10 Old 02-21-2012, 11:58 AM
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Originally Posted by amp23 View Post
Okay I'm confused... How do you know no one was born or died between october 5 and 14, 1852? That sounds kind of far fetched to me, though I guess it is possible...
He's just being tongue in cheek. Since the days were 'deleted' from the calendar, nobody could possibly have been born or died on days that didn't exist.

Kind of ruins the joke though, if it has to be explained.....

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post #5 of 10 Old 02-21-2012, 12:04 PM
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Ahh. It just all in all confused me lol. I mean where do people come up with these ideas? Haha
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post #6 of 10 Old 02-21-2012, 12:12 PM
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I'm just going to sum this up, because I couldn't understand that lol.

Leap year occurs because the sun takes an extra quarter of a day to go around the sun. We don't count that quarter until the 4th quarter, which ends up being a whole day...so we add an extra day to February, and call it a leap year.

I'm also sure that there is still extra, but I can't remember where it goes, it how it happens. I think they add an extra day after 100 years....but don't take my word for it.

Oh yeah, I'll also be celebrating my 16th on February 29th. I'll be 4.
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post #7 of 10 Old 02-21-2012, 01:23 PM Thread Starter
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Originally Posted by lubylol View Post
I'm just going to sum this up, because I couldn't understand that lol.

Leap year occurs because the sun takes an extra quarter of a day to go around the sun. We don't count that quarter until the 4th quarter, which ends up being a whole day...so we add an extra day to February, and call it a leap year.

I'm also sure that there is still extra, but I can't remember where it goes, it how it happens. I think they add an extra day after 100 years....but don't take my word for it.

Oh yeah, I'll also be celebrating my 16th on February 29th. I'll be 4.
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Close ... they subtract a day after 100 years since there is no leap year that year - except that every 400 years there is a leap year.

As for your birthday ... you are still 16 years old but you've only had 4 birthdays. Think of Pirates of Penzance.

I'm not arguing with you, I'm just explaining why I'm right.

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post #8 of 10 Old 02-21-2012, 02:06 PM
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Originally Posted by iridehorses View Post
Close ... they subtract a day after 100 years since there is no leap year that year - except that every 400 years there is a leap year.

As for your birthday ... you are still 16 years old but you've only had 4 birthdays. Think of Pirates of Penzance.
Thanks for clarifying! I knew it was something funky like that.

And as for my birthday, I've had 16 birthdays, but only 4 birthdates
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post #9 of 10 Old 02-21-2012, 06:46 PM
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Ughhhh.

My prof tried to be all smart and teach this to us in my INTRO astronomy class.

We had no idea what he was talking about because he couldn't explain it himself and then he went on to write some freaking long physics/math equation to prove his leap year theory. I still don't get how a leap year came to be because of the actual solar year and I'm going to be tested on the physics/math equation he made up to explain his backwards theory...


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post #10 of 10 Old 02-21-2012, 06:54 PM
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Whoa! This is very interesting. It's going to be my conversation starter for the night at work! I'll need it, the overnight shifts are torture if you're bored and have nothing to talk about. THANK YOU!
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