+ * Returns a reference to the TimeZone used by this DateIntervalFormat's calendar.
+ * @return the time zone associated with the calendar of DateIntervalFormat.
+ * @stable ICU 4.8
+ */
+ virtual const TimeZone& getTimeZone(void) const;
+
+ /**
+ * Sets the time zone for the calendar used by this DateIntervalFormat object. The
+ * caller no longer owns the TimeZone object and should not delete it after this call.
+ * @param zoneToAdopt the TimeZone to be adopted.
+ * @stable ICU 4.8
+ */
+ virtual void adoptTimeZone(TimeZone* zoneToAdopt);
+
+ /**
+ * Sets the time zone for the calendar used by this DateIntervalFormat object.
+ * @param zone the new time zone.
+ * @stable ICU 4.8
+ */
+ virtual void setTimeZone(const TimeZone& zone);
+
+ /**