code: private Date bytesToDateTime(byte[] bytes) {
          double doubleSeconds = bytesToDouble(bytes);
          return Double.isNaN(doubleSeconds) ? null : new Date((long) ((doubleSeconds - START_DATES_SECONDS_DIFFERENCE)
                  * MILLISECONDS_IN_SECONDS));
      }
docs: The function to convert an array of bytes that stores the number of seconds elapsed from 01/01/1960 into
  a variable of the {@link Date} type. The {@link SasFileConstants#DATE_TIME_FORMAT_STRINGS} variable stores
  the formats of the columns that store such data.
  
  @param bytes an array of bytes that stores the type.
  @return a variable of the {@link Date} type.