ical-recurrence: test that ByWeekNo with a numeric ByDay stays on that week day byEveryWeekDayWeek silently drops every Specific ByDay, and when nothing is left the BYWEEKNO branch of yearlyDayCandidate falls back to all of Monday to Sunday. BYWEEKNO=20;BYDAY=2MO therefore yields all seven days of week 20 rather than a Monday. The rule does not conform, so the numeric part may be reported as a fixable error or ignored, the way filterEvery reports it for the frequencies that do not allow it at all. But no reading of the rule puts an occurrence on a Wednesday, and today nothing is reported either. This asserts only the part that is independent of how the non-conformance is resolved.