The convention for setting time zones in container images is by setting the TZ environment variable. The Horizon and Meridian core image is based on CentOS 8 and the behavior is as the following:
As you can see the 6h time difference is set accordingly with the given TZ environment variable.
On a Minion which is based on Ubuntu Focal the behaviour is different:
The time is always shown in UTC even the region is displayed from the TZ environment variable.