Value ConvWorkDay::Scan(const Value& text) const {
	DUMP("ConvWorkDay::Scan");
//	if(text.IsNull()) return Null;

	Value v = ConvertDate::Scan(text);
	if(v.IsError()) return v;
	
	Date d = v;
	if(IsHoliday(d)) return ErrorValue("Cannot be a holiday!");
	return v;
}