`Sep 26 00:15:00 2020` can be converted as below ,but how can I convert Sat

```
SELECT 
  TO_CHAR(
    TO_DATE('Sep 26 00:15:00','Mon DD HH24:MI:SS')
  , 'YYYY-MM-DD HH24:MI:SS'
  )
FROM dual;

```

> 
> ORA-01843: not a valid month
> 
> 
>