[m-rev.] calendar module proposal

[Paul Bone]

On Tue, Jan 27, 2009 at 05:10:32PM +1100, Peter Ross wrote:
> On Tue, Jan 27, 2009 at 5:01 PM, Paul Bone <pbone at csse.unimelb.edu.au> wrote:
> > On Tue, Jan 27, 2009 at 04:02:11PM +1100, Ian MacLarty wrote:
> >> Hi,
> >>
> >> Here's a proposal for a calendar module for the standard library.
> >> Could interested people take a look and give me some feedback?
> >> Since this module only implements the Gregorian calendar, it might not
> >> be suitable for working with dates prior to 1582.  Perhaps it should be
> >> renamed to gregorian_calendar or gcalendar?
> >
> > I'd prefer gregorian_calendar.
> >
> >> Index: library/calendar.m
> >> ===================================================================
> >> RCS file: library/calendar.m
> >> diff -N library/calendar.m
> >> --- /dev/null 1 Jan 1970 00:00:00 -0000
> >> +++ library/calendar.m        27 Jan 2009 03:51:25 -0000
> >> @@ -0,0 +1,961 @@
> 
> >> +
> >> +:- type day_of_week
> >> +    --->    sunday
> >> +    ;       monday
> >> +    ;       tuesday
> >> +    ;       wednesday
> >> +    ;       thursday
> >> +    ;       friday
> >> +    ;       saturday.
> >
> > IMHO a week starts on Monday, so sunday should sort after monday (after
> > saturday), but I'm not sure what is 'official'.
> >
> The ISO prescribes Monday as the first day of the week with ISO-8601
> for software date formats.

I stand corrected :-)

Thanks.


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