If set to TRUE, the clock syncs after taking a snapshot.
time.synchronize.restore
If set to TRUE, the clock syncs after reverting to a snapshot.
time.synchronize.resume.disk
If set to TRUE, the clock syncs after resuming from suspend and after migrating to a new host using the VMware vMotion feature.
time.synchronize.shrink
If set to TRUE, the clock syncs after defragmenting a virtual disk.
time.synchronize.tools.startup
If set to TRUE, the clock syncs when the tools daemon.
以下内容参考于 http://www.vmware.com/files/pdf/Timekeeping-In-VirtualMachines.pdf 第 8 页
You can also force the CMOS TOD clock to start at a specified time whenever the virtual machine is powered on, independent of the real time. To do this, set the configuration file option rtc.startTime. The value you specify is in seconds since Jan 1, 1970 00:00 UTC, but it is converted to the local time zone of the host operating system before setting the CMOS TOD clock (under the assumption that the guest operating system requires the CMOS TOD clock to read in local time). If your guest operating system is running the CMOS TOD clock in UTC or some other time zone, you should correct for this when setting rtc.startTime.