Correcting system time

I've installed Solaris 8, but didn't quite give it the correct (machine) time.

Think the machine is out of sync.

Can I change that afterwards or do I have to do another install right from the beginning?

No you don't need to reinstall.

Use the 'date' command as root to update the time.

If you specified the wrong timezone, then edit /etc/default/init and then reboot.

For time only there is no need to reboot.