For more information see Accessing Oracle Hardware Management Pack.
ilomconfig modify clock [--datetime=MMDDhhmmYYYY] [--timezone=timezone]
ilomconfig modify clock --usentp=enabled|disabled -ntp-server1=ntpserver1 [--ntp-server2=ntpserver2]
Configuring Oracle ILOM (ilomconfig), Oracle Server CLI Tools User's Guide at http://www.oracle.com/goto/ohmp/docs