When running a virtualized host with VMware tools installed; time information (by default) is syncronized against the ESXI host. Although it is far to easy to take this feature for granted and not actually understand how this process actually works. Initially assuming that the ESXI host setup an NTP server and the Windows host was consuming from this on the ESXI host was my initial thought, although it turns out the process is much simpler than this, by invoking the VMwareToolboxCmd.exe utility using the 'timesync' switch you can perform time related operations. If for some reason you are having syncronization issues with the time you should firstly ensure that it is currently enabled:
cd C:\Program Files\VMware\VMware Tools
VMwareToolboxCmd.exe timesync status
VMwareToolboxCmd.exe timesync enable