code: public static boolean isBetweenHours(long dt, TimeZone tz, int from, int to) 
      {
          return isBetweenHours(dt, tz, from, to, 0);
      }
docs: Returns <CODE>true</CODE> if the given date is inside the start and end hours.
  @param dt The date to be checked
  @param from The start hour to check that the date is after
  @param to The end hour to check that the date is before
  @param tz The timezone associated with the date
  @return <CODE>true</CODE> if the given date is inside the start and end hours