I recently ran into a snag with our Device Enrollment Program (DEP) workflow. Users were not being prompted to enable Location Services to automatically set the time zone, nor was the explicit Time Zone selection screen displayed during Setup Assistant.
The result was that devices wound up configured with the default Cupertino, CA location, and a Pacific time zone. We’re on the East coast – so we’d have to script a change of settings, or worse, have the user manually modify them.
As it turns out, this is an effect of the new “Express Setup” option in macOS High Sierra.