Spool File With Date/Time Name

Amazing way to spool  automatically :

SET TERMOUT OFF
COLUMN today_ddmmyyyy_col NEW_VALUE today_ddmmyyyy
SELECT TO_CHAR ( SYSDATE, 'DDMMYYYY') AS today_ddmmyyyy_col
FROM dual;
SET TERMOUT ON
SPOOL log_&today_ddmmyyyy..log

Thank you
Osama Mustafa