docs: public static boolean eventDateValid(String eventDate) {
      	boolean result = false; 
      	if (extractDate(eventDate)!=null) { 
      		result = true;
      	} else { 
      		Interval interval = extractInterval(eventDate);
      		if (interval!=null) { 
      			if (interval.getStart().isBefore(interval.getEnd())) { 
      			   result = true;
      			}
      		}
      	}
      	return result;
      }