DECLARE
  X NUMBER;
  user_name varchar2(30);
BEGIN
  SYS.DBMS_JOB.SUBMIT
    ( job       => X 
     ,what      => 'DROP_HISTORICAL_PARTITIONS(''MD_LOG_PARTITION'',9);'
     ,next_date => to_date('05/11/2016 12:00:01','dd/mm/yyyy hh24:mi:ss')
     ,interval  => next_day(last_day(sysdate),'SUN')
     ,no_parse  => FALSE
    );
 COMMIT;
END;
/

Error at line 1
ORA-23319: parameter value "06-NOV-16" is not appropriate
ORA-06512: at "SYS.DBMS_JOB", line 60
ORA-06512: at "SYS.DBMS_JOB", line 139
ORA-06512: at line 5