code: public static String getTime(long epochTimestamp, String timeFormat,
              String zoneId) {
          return ZonedDateTime.ofInstant(Instant.ofEpochMilli(epochTimestamp),
                  getZoneId(zoneId)).format(getDateTimeFormatter(timeFormat));
      }
docs: Gets time.
  
  @param epochTimestamp the epoch timestamp
  @param timeFormat     the time format
  @param zoneId         the zone id
  @return the time