From: loreto bagio
Message: 34328
Date: 2004-09-28
> --- In cybalist@yahoogroups.com, enlil@... wrote:to
> > Loreto:
> > > Actually it probably is that the oldest calendars have several-
> > > numbered days in a week. Four and seven are not the favourites.
> >
> > ?? Let's get this right. The time it takes for the moon to go
> around
> > the earth is said to take 27.321661 days, no?
>
> No! That's the sidereal period, i.e. with reference to the fixed
> stars. Relative to the Earth-Sun axis (which moves with respect
> the fixed stars), it's a bit over 29 and a half days - rememberthat
> the Moslem year is between 354 and 355 days long.year
>
> > The year is approximately 365 days long, for one thing. When you
> take
> > the lunar cycle in _combination_ with the solar cycle, "seven" is
> > really great. The solar year can be approximated using 7 and 52
> > (a multiple of 13). So we can approximate 13 lunar cycles in such
> > a rounded-off year, or rather 13 monthes... all using nice whole
> > numbers. Sweet!
>
> It's a shame it isn't true. Roman consuls only got a 13-month
> if they were on good terms with the pontifex maximus.Oh and yes again. See http://webexhibits.org/calendars/calendar-
>
> Richard.