data created tables

Hi,
How can I know what is the date created of a tables??

I tried with users_tables and dba_tables but there isn't data


Thanks
Raf

Code:

---

SQL> select created from dba_objects
  2  where object_name = 'XYZ'
  3  and owner = 'SYSTEM'
  4  /

CREATED
---------
27-MAR-03

---