code: public static Calendar addHours(Calendar origin, int value) {
          Calendar cal = sync((Calendar) origin.clone());
          cal.add(Calendar.HOUR_OF_DAY, value);
          return sync(cal);
      }
docs: Add/Subtract the specified amount of hours to the given {@link Calendar}.
  
  <p>
  The returned {@link Calendar} has its fields synced.
  </p>
  
  @param origin
  @param value
  @return
  @since 0.9.2