Ntp client omnios
From Asenjo
If you want your omnios host to synchronize its clock with the ntp.org pool servers, just copy the ntp.conf.sample file, synchronize the time with one of them and enable the ntp daemon:
cp /etc/inet/ntp.conf.sample /etc/inet/ntp.conf ntpdate 0.pool.ntp.org svcadm enable ntp