code: public Expression<java.util.Date> between(java.util.Date startValue, java.util.Date endValue) {
  		SimpleDateFormat formatter = getDateTimeFormatter();
  		String valueString = "'" + formatter.format(startValue).concat("Z") + "' AND '" + formatter.format(endValue) + "'";
  		return new Expression<java.util.Date>(this, Operation.between, valueString);
  	}
docs: Method to construct the between expression for date
  
  @param startValue the start value
  @param endValue the end value
  @return Expression