code: public static boolean isBetweenHours(int from, int to, TimeZone tz) 
      {
          return isBetweenHours(System.currentTimeMillis(), tz, from, to, 0);
      }
docs: Returns <CODE>true</CODE> if the current date is inside the start and end hours.
  @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 current date is inside the start and end hours