code: public void setDSTSavings(int millisSavedDuringDST) {
          if (isFrozen()) {
              throw new UnsupportedOperationException("Attempt to modify a frozen SimpleTimeZone instance.");
          }
  
          if (millisSavedDuringDST <= 0) {
              throw new IllegalArgumentException();
          }
          dst = millisSavedDuringDST;
  
          transitionRulesInitialized = false;
      }
docs: Sets the amount of time in ms that the clock is advanced during DST.
  @param millisSavedDuringDST the number of milliseconds the time is
  advanced with respect to standard time when the daylight savings rules
  are in effect. A positive number, typically one hour (3600000).