CMS affectively has two times start time which is the acd default time and start time +utc which is the timezone handled by TZ. (TZ updater is used to update timezone information)
The time zone is handled by the variable TZ. For global configuration edit the “/etc/default/init” file and alter the TZ line for example:
TZ=GMT if you want to set it to GMT.
To change date from CLI
date -s “30 october 2016 08:41”
to view from CLI