Re: pinhole Leap Year

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From: pauld@exploratorium.edu
Date: Fri Nov 21 2003 - 09:02:31 PST 

Message-ID: <1512.209.239.173.234.1069434151.squirrel@www.exo.net>
Date: Fri, 21 Nov 2003 09:02:31 -0800 (PST)
Subject: Re: pinhole Leap Year
From: pauld@exploratorium.edu

Hi Becca

The Calendar takes all this into account

the rule is

If the year number is evenly divisible by 4, add a leap year day
unless the year number is evenly disisible by 100 in which case don't add
the leap year day
unless the year number is evenly divisible by 400 in which case you
actually add the leap year day.

Thus 1900 did not have a leap year day but 2000 did.

Paul D

> did I already ask this? I can't recall...
> In one text it reads that the Earth makes 365.26 rotations in one year.
> We
> discussed that that the .25 of a rotation adds up every four years to make
> one full day which adds a day to those calendar years named, "Leap Year."
> The hanging question is what do we do with the .01 of a day? After
> centuries upon centuries those hundredths add up to full days too.
> Hmmmmm.
> Thanks for your thoughts (possibly again) Becca
>
>
>
>
>
> "The most beautiful thing we can experience is the mysterious."
>
> -- Albert Einstein
>
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