docs: public static String createEventDateFromStartEnd(String startDate, String endDate) {
  		String result = null;
          boolean startIsRange = false; 
          String separator = "";
  		
  		if (!DateUtils.isEmpty(startDate)) {
  			separator = "/";
  			if (DateUtils.eventDateValid(startDate)) { 
  			    result = startDate;
  			    if (DateUtils.isRange(result)) { 
  			    	startIsRange = true;
  			    }
  			} else { 
  				EventResult startResult = DateUtils.extractDateFromVerbatimER(startDate);
  				if (startResult.getResultState().equals(EventResult.EventQCResultState.DATE)) { 
  					result = startResult.getResult();
  				}
  				if (startResult.getResultState().equals(EventResult.EventQCResultState.RANGE)) {
  					result = startResult.getResult();
  					startIsRange = true;
  				}
  			}
  		} 
  		
  		boolean startDateFound = !DateUtils.isEmpty(result);
  		
  		logger.debug(result);
  		
  		if (!DateUtils.isEmpty(endDate)) { 
  			if (startIsRange && result.contains("/")) {
  				// we need just the start of the range
  				result = result.substring(0, result.indexOf('/'));
  			} 
  			logger.debug(result);
  
  			if (DateUtils.eventDateValid(endDate)) { 
  				if (startDateFound) { 
  					if (DateUtils.isRange(endDate) && endDate.contains("/")) { 
  						endDate = endDate.substring(endDate.indexOf('/')+1);
  					}
  				   result = result + separator + endDate;
  				} else { 
  					result = endDate;
  				}
  				logger.debug(result);
  			} else { 
  				String endBit = "";
  				EventResult endResult = DateUtils.extractDateFromVerbatimER(endDate);
  				logger.debug(endResult.getResultState());
  				if (endResult.getResultState().equals(EventResult.EventQCResultState.DATE)) { 
  					endBit = endResult.getResult();
  				}
  				if (endResult.getResultState().equals(EventResult.EventQCResultState.RANGE)) {
  					endBit = endResult.getResult();
  					if (endBit.contains("/")) { 
  						endBit = endBit.substring(endBit.indexOf('/')+1);
  					}
  				}
  				if (!DateUtils.isEmpty(endBit)) { 
  					if (startDateFound) { 
  					    result = result + separator + endBit;
  					} else { 
  						result = endBit;
  					}
  				}
  			}
  		}
  		
  		if (!DateUtils.isEmpty(result) && !DateUtils.eventDateValid(result)) {
  			logger.error(result);
  			result = null;
  		}
  		
  		return result;
  	}