code: public TimeZone getTimeZone()
      {
          if ( fDateFormat != null ) {
              // Here we clone, like other getters here, but unlike
              // DateFormat.getTimeZone() and Calendar.getTimeZone()
              // which return the TimeZone from the Calendar's zone variable
              return (TimeZone)(fDateFormat.getTimeZone().clone());
          }
          // If fDateFormat is null (unexpected), return default timezone.
          return TimeZone.getDefault();
      }
docs: Get the TimeZone
  @return A copy of the TimeZone associated with this date interval formatter.