By: Tom Sydney Kerckhove <syd@cs-syd.eu>
ical-recurrence: keep the week day of a numeric ByDay @ The BYDAY rule part MUST NOT be specified with a numeric value with the FREQ rule part set to YEARLY when the BYWEEKNO rule part is specified. @ The number is meaningless once BYWEEKNO has fixed the week, so discard the number and keep the week day rather than discarding the rule part. Dropping it entirely was worse than ignoring the rule part: with no week days left, the BYWEEKNO branch of yearlyDayCandidate falls back to all of Monday to Sunday, which widens the recurrence set to every day of the week instead of narrowing it.