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Re: Date and time on Cindu: yearly update

From:ROGER MILLS <rfmilly@...>
Date:Monday, May 19, 2008, 5:30
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.

Replies

Mark J. Reed <markjreed@...>
Carsten Becker <carbeck@...>