[CentOS] Set hardware clock manually

I can't reboot a server to set the hardware clock to UTC time, but CentOS was installed with the assumption that the PC was running UTC.
Is it possible to update the hardware clock to the right time and therefore allow CentOS to maintain the right time without rebooting? I am hoping to use this route for consistency versus changing how CentOS interprets the time so all servers are the same.

Thanks!
jlc