On 4/15/2017 5:09 AM, Morten Reistad wrote:
> 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.

At some point is will be easier to just change the rate of rotation of
the earth rather than do all the math required to track it.   lol

https://xkcd.com/162/

--

Rick C

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