Tvheadend

I'm using diseqc on satellites across different time zones.

UK (freesat)
Hotbird and Asta (19.2)

no matter what i change in the dvbtuner/network section for the time zone, nothing changes.

i have it set now as UTC + 1 for 28.2. and UTC + 2 for the others

do i need to reset something for it to update / change? (or delete some files)

Thanks