Nicholas,

If you are refering to the date-time standard ISO 8601, there are
several date formats.

You can use year-day yyyy-ddd where days are numbered 1 to 365/6.
There is also year-week-day yyyy-Www-d but then the days range from 1 to
7, never 23 as you indicated.
It does not become more abstruse later in the year. Weeks range 1-52/3.

Under ISO 8601 monday is the first day of the week.

Yes, the first week of the year is the first containing Thursday.
Yes, Friday Jan 1 would be part of the previous year, which can have 53
weeks if needed.

There is an iso8601 yahoo group if you want to know more and also a
powerpoint that covers the 8601 formats and touches on some problems
with 8601, on my http://www.i18nguy.com site.
Scroll down to the bottom of the home page and the link is there.

tex


Nicholas Bodley wrote:

>
> 2003-01-21 23:41:38, "Pierpaolo BERNARDI"
> <bernardp@...> wrote:
>
> >On 12.19.9.16.19; tzolkin = 10 Cauac; haab = 12 Muan
> >Michael Everson ...
>
> Even in our own culture, there is an alternate scheme, used
> (afaik) in industry for date coding, and perhaps elsewhere.
>
> Each week of a year is numbered, and the day of the year,
> also; today is W 4 D 23, for instance, early in the morning.
>
> It becomes more abstruse as the year unfolds.
>
> One needs to consider with some care how to define the first
> week of a year, btw. IIrc, if it contains a Thursday, it is
> the first week, but that implies that the first day of a week
> would be Monday. (Then, would a week in which 1 Jan. is
> Friday be part of the preceding year, by this scheme? I guess
> so; I don't know.)
>
> (My reference is the very-likable Wintel systray utility
> TClockEx, by Dale Nurden of South Africa:
> <http://users.iafrica.com/d/da/dalen>. You can configure it
> to display the day and week of the year.)
>
> Nicholas Bodley ||@|| Waltham, Mass.
> Why use Opera? http://tntluoma.com/opera/lover/
> Sent via TheWorld.com
> *folded* years? Huh?
>
>
> www.egroups.com/group/qalam - world's writing systems.
> To unsubscribe: qalam-unsubscribe@egroups.com
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

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