I think what you want, at least on the mobile Google Calendar app is under: Settings - General - Use device time zone If you disable this, you'll keep everyth

I think what you want, at least on the mobile Google Calendar app is under: Settings - General - Use device time zone If you disable this, you'll keep everything pinned to your preferred timezone. But I'm pretty sure a better approach is to select the timezone of the event. If it is at 10am in Germany, why not tell your calendar about this? Sure, this is an extra step, but it is part of the event's parameters (as pointed out in the OP).