On Sat, 15 Apr 2017 11:09:21 +0200, Morten Reistad
 declaimed the following:

>In article , rickman   wrote:
>>On 4/14/2017 9:51 AM, Dennis Lee Bieber wrote:
>>> On Thu, 13 Apr 2017 23:05:42 +0100, Dr J R Stockton
>>>  declaimed the following:
>>>
>>>> In comp.sys.raspberry-pi message >>> x.com>, Tue, 4 Apr 2017 12:23:02, Dennis Lee Bieber
>>>>  posted:
>>>>
>>>>>       365.2422 days to a Tropical (solar) year. 365.2425 for Gregorian
>>>>> (that's why we drop a leap day every four-hundred years). 3
>>>>> ...
>>>>
>>>> No.  We, at least on this side of the Atlantic, drop a quadrennial leap
>>>> day every one hundred years, except every four hundred years.  It is
>>>> thought that the librettist of "The Pirates of Penzance" was expecting
>>>> that 1900-02-29 would fairly soon occur.
>>>
>>>  Please swat me on the head -- I did know that (and if I were
>>> enumerating the leap-day rules rather than looking at fractional years...
>>> leap day in years divisible by 4 except if also divisible by 100 unless it
>>> is divisible by 400...
>>
>>So for your final exam, did we have a leap day in year 2000?  Or is
>>there another layer to the progression?
>
>And for how long will it work before it, too, goes out of alignment
>by one day.

 I vaguely recall a program for an old HP calculator that may have
included terms for either 4000 or 40000 year corrections.
--
 Wulfraed                 Dennis Lee Bieber         AF6VN
    wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/

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