Setting TimeZone on a VM

I am trying to set a vdi's timezone.  How do i do that with DEM, use the ADMX settings?  The GPO i think i need to set is below.

Computer\HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\TimeZoneInformation

I believe I want to set the TimeZoneKeyName, StandardName and DaylightName.  I assume this would be in the Computer ADMX-based settings but couldn't find it. I also checked in the User ADMX-based settings and didn't find it.

I want to set the computer TimeZone to always be HST.