Yes, you said that "VPS/broker's server actual time zone has no bearing on your system", but it is not fully correct.
In order to avoid issue I have aligned, VPS, Zorro and Broker Server Time. On top of this there is the weekend downtime of the server to take in consideration.

I can setup a demo account and test the different settings, but it is time consuming. I was looking for somebody with "live" experience in order to reduce the effort.