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    Re: Leap year
    From: Doug Bamford
    Date: 1999 May 09, 23:25 EDT

    Thanks my man, I obviously missed that one too.
    Now it all makes some sense.
    I appreciate you all moving with us slowpokes too.
    Doug
    -----Original Message-----
    From: Chuck Taylor <ctaylor{at}XXX.XXX>
    To: NAVIGATION-L{at}XXX.XXX
    <NAVIGATION-L{at}XXX.XXX>
    Date: Sunday, May 09, 1999 12:50 PM
    Subject: Re: Leap year
    >On Sun, 9 May 1999, Doug Bamford wrote:
    >
    >> Why is 1800 not a leap year? I always thought the method of
    identification
    >> was the year must be divisible by 4.
    >> 1800 is in that category, is it not?
    >
    >Doug,
    >
    >It takes ~365.24 days for the earth to complete its orbit around the sun.
    >If it were exactly 356.25 days, then making every 4th year a leap year
    >would make things come out even. That was the premise of the Julian
    >calendar, which was used from the time of Julius Caesar to the mid 1700's.
    >The problem was that the extra 0.01 day threw things off over time and the
    >calendar and the seasons drifted out of alignment. Hence, the Gregorian
    >calendar, named for the pope at the time. The rules are now:
    >
    >1. Years divisible by 4 are leap years, except
    >
    >2. Years divisible by 100 are NOT leap years, except
    >
    >3. Years divisible by 400 ARE leap years.
    >
    >So, 1800 and 1900 were not leap years, but 2000 will be a leap year.
    >
    >Chuck Taylor
    >Everett, WA, USA
    >
    

       
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