Re: Date and time on Cindu: yearly update

Mark Reed wrote:
>
>On Sun, May 18, 2008 at 11:50 PM, ROGER MILLS <rfmilly@...> wrote:
> > >You have a purely arithmetic rule about *when* a leap year occurs
> >> (years 4, 10, and 17 of a 19-year cycle),
> >
> > I don't think so: according to my calc. 700 - 706 - 713 - 719 - 725 -
>732 -
> > 738 etc. were leap years, so it goes 6-7-6.
>
>RIght, those are the intervals between leap years: 6 years, then 7
>years, then 6 years.  That means that you have a pattern of leap years
>within common years that repeats every  6+7+6 = 19 years; that's the
>"19-year cycle" I mentioned.
>
>When I said "years 4, 10, and 17", I didn't mean "4 years, then 10
>years, then 17 years"; I meant, "year 4, then skip 6 years to year 10,
>then skip 7 years to year 17".  After that, you skip 6 years again,
>but the leap-year cycle starts over at 1 after year 19. So from 17 to
>18 (1 year) to 19 (2 years) to year 1 of the next cycle (3 years) to
>year 2 (4 years) to year 3 (5 years) to year 4 (6 years): 6 years
>brings you back to year 4 again, and the pattern of 4, 10, 17 repeats
>over and over again.
??? I don't follow. Must think hard...........
>
>Those numbers were based on this bit from
>http://cinduworld.tripod.com/cindustats.htm: "the last leap year was
>751, the next one will be 758."  However, if that's correct, then your
>list above is not - if 700, 706, and 713 are leap years, then 758
>would not be one; 757 and 763 would be:
Oops I missed that. 758 is wrong.
>
>      0 |    +6   +7  +6
>700  | 706 713 719
>719  | 725  732 738
>738  | 744  751 757
>757  | 763  770  776
>
>So which list do you want to be correct?
Your list is correct; I also made a list with the same figures.....(showing
how leap day advances by quarters, hope I got that right......)
>
> > I like that [leap day changing every time] better than having it be a
>fixed day.
>
>I agree with you there.  Complex is fun. :)
>
> >  (NB I am not skilled at this sort of thing!!!)
>That puts you in good company.  JRRT said exactly the same thing in
>his description of the Shire calendar. :)
>
> >  I'm still digesting your long previous post..........
>
>I apologize for the length.  Not trying to confuse anyone.  Just
>trying to get enough detail to allow me to make a tool for you...
Will it require an instruction manual? "Alien Calendars for Dummies"-- maybe
you could get it published.  How does Carsten's calendar work? I think he's
described it, but don't remember.

(BTW-- it appears likely that sometime this summer I'll be in Asheville NC
for a while-- nephew has apparently bought a house there, and Sister plans
to descend (ascend) on him to escape Florida heat, and I'll go down for a
while to check it all out. Hopefully I could get to the Atlanta area for a
meet-up (or maybe you'd like to visit Asheville?). All this "insh'Allah" of
course.

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