ConvertToZone and DST?

I have a scenario where I need to ensure a date/time stored is always converted to CET before I use it.

I have tried the LS converttozone method and then using the zonetime which does the job, however the DST attribute is causing me some worries. The help states:

"dst

Boolean. Indicates whether daylight-saving time is in effect (True) or not (False) in the new time zone."

So the parameter indicates if DST is in effect in the TARGET time zone for the resulting date/time.

I’ve not had a need to use this before, so the question is what to set the DST param to. Anyone with experience of using this I would appreciate your thoughts!