Re: [calsify] SKIP was Re: AD review of draft-ietf-calext-rscale-03

[Marten Gajda <[e-mail]>]

Am 03.02.2015 um 21:48 schrieb Cyrus Daboo:
> Hi Ken,
>
> --On February 3, 2015 at 3:23:13 PM -0500 Ken Murchison 
> <[e-mail]> wrote:
>
>> I think both of these come out the same (and my libical computes the
>> same) as there is no BYMONTHDAY or anything else forcing the expansion
>> onto Feb 29 in a non-leap year.  In this case the DTSTART just gives us
>> the first instance (which in this case doesn't fall on a Sunday so isn't
>> included).  After that, the BYMONTH+BYDAY is what really drives the
>> expansion.
>
> But if we use 20140229 as the DTSTART - and that is a leap day on a 
> Sunday - then I think Marten is write that apply the SKIP after the 
> BYMONTH and before the BYDAY would result in only Sundays in leap 
> years being returned.
>
> I think having those two rules return different results would be 
> counterintuitive so I would prefer we left the order of BYxxx element 
> and SKIP processing as it is now.
>
you meant 20040229, right?

The point is, that evaluating SKIP=OMIT after BYMONTH=2 would remove Feb 
29th in non-leap years and there would be nothing left for BYDAY to expand.

I'd also prefer having SKIP=OMIT behave like a rule without RSCALE.

-- 

*Marten Gajda*
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