Time zone query

I run a weekly zoom from the UK with participants from Ukraine. The time is 2.00 - 4.00 (i.e. 4.00 - 6.00 Ukrainian time). I want to run the meeting from France. Ukraine is one hour ahead of France so I've adjusted the timing to 3.00 - 5.00. However, the 'time zone' setting still reads as 'GMT plus 1' even though my computer's clock has adjusted to French time. I'd welcome any advice on this please.