This is a question that originated from this question by Jamie.
I thought I'll check Dougman's answer. What's happening here? A restore?
select created from dba_users where username = 'SYS';
select min(created) FROM dba_objects;
select created from v$database;
CREATED
-------------------------
10-SEP-08 11:24:44
MIN(CREATED)
-------------------------
10-SEP-08 11:24:28
CREATED
-------------------------
18-DEC-09 15:49:00
Created from v$database is more than one year later than creation date of user SYS and SYS' objects.
If you ask for slightly more detail in the first two queries you'll find that the schemas are Oracle's default ones:
SQL> select owner, min(created), max(created)
2 from dba_objects
3 where created < (select created from v$database)
4 group by owner
5 /
OWNER MIN(CREATED) MAX(CREATED)
------------------------------ -------------------- --------------------
PUBLIC 15-OCT-2007 10:09:10 15-OCT-2007 11:08:07
OUTLN 15-OCT-2007 10:09:17 15-OCT-2007 10:11:32
CTXSYS 15-OCT-2007 10:35:41 15-OCT-2007 10:36:12
SYSTEM 15-OCT-2007 10:09:22 15-OCT-2007 10:48:40
SCOTT 15-OCT-2007 11:36:01 15-OCT-2007 11:36:01
XDB 15-OCT-2007 10:36:34 15-OCT-2007 10:53:50
SYS 15-OCT-2007 10:09:07 15-OCT-2007 12:01:43
....
21 rows selected.
SQL>
On my database the value for CREATED is before I installed Oracle on my machine. So I think the dates represent when Oracle populated the data dictionary for that version of Oracle.
edit
Yep, it could be the dates in the DCBA templates; certainly my database was built using them.