Oracle distinct Date

SELECT distinct to_char(to_date(AC_DT,'dd-mon-yyyy/HH24:MI:SS'),'DD/mm/rr') x FROM EDITED;

X
--------

13/02/13
07/03/13
10/03/13
11/03/13
28/03/13
16/03/13
08/04/13
25/04/13
02/05/13
29/04/13