public void setStartRule ( int month , int dayOfMonth , int time ) { if ( isFrozen ( ) ) { throw new UnsupportedOperationException ( "Attempt to modify a frozen SimpleTimeZone instance." ) ; } getSTZInfo ( ) . setStart ( month , - 1 , - 1 , time , dayOfMonth , false ) ; setStartRule ( month , dayOfMonth , 0 , time , WALL_TIME ) ; }
Sets the DST start rule to a fixed date within a month .