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Not every 4 years a leap year

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Not every 4 years a leap year

Postby kelvin911 » Dec 3rd, 2012, 7:37 pm

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Re: Not every 4 years a leap year

Postby Glacier » Dec 3rd, 2012, 11:24 pm

I don't know what school that guy went to, but I distinctly remember learning that 1900 was not a leap year because 19 is not divisible by 4. Something about there not being exactly 365.25 days in a year, so the calender had to take out the odd leap year.

The old Julian was imprecise, so the Gregorian calender came along whereby leap years on centuries that aren't divisible by 400 (or 4 if you ignore the zeros) were subtracted.
Last edited by Glacier on Dec 3rd, 2012, 11:32 pm, edited 2 times in total.
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Re: Not every 4 years a leap year

Postby Captain Awesome » Dec 3rd, 2012, 11:27 pm

If February had 29 days, it would have 3 pay periods in it.

Too bad!
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Re: Not every 4 years a leap year

Postby grammafreddy » Dec 4th, 2012, 12:34 am

Captain Awesome wrote:If February had 29 days, it would have 3 pay periods in it.

Too bad!


That's an odd kind of a thought - the shortest month having three pay periods. Tickles my funny bone somehow. LOL
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Re: Not every 4 years a leap year

Postby oneh2obabe » Dec 4th, 2012, 4:40 am

Glacier wrote:I don't know what school that guy went to, but I distinctly remember learning that 1900 was not a leap year because 19 is not divisible by 4. Something about there not being exactly 365.25 days in a year, so the calender had to take out the odd leap year.

The old Julian was imprecise, so the Gregorian calender came along whereby leap years on centuries that aren't divisible by 400 (or 4 if you ignore the zeros) were subtracted.

We must have had the same math teach ... funny the things we remember from school. The Gregorian Calendar omits 3 leap days every 400 years, omitting February 29 in the 3 century years (integer multiples of 100) that are not also integer multiples of 400 ... 1600 was a leap year, but 1700, 1800 and 1900 were not. 2000 was a leap year, but 2100, 2200, and 2300 will not be.
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