GitHub Enterprise automatically synchronizes its clock by connecting to NTP servers. If for some reason the clock starts to drift, there are a few ways to re-adjust it.
You can:
Set new NTP servers if your installation cannot access the default ones.
SSH into your installation and run the
ghe-time-sync
command.Prevent your hypervisor from trying to set the virtual machine's clock. For example, you may be able to accomplish this on VMware by unselecting Synchronize guest time with host.