Actually the one country that does cause a real problem for us business wise is Spain - they should be in the same timezone
Flying to Madrid and onto Badajoz as I regularly do takes me a full working day to complete !
Don't forget France and the Benelux countries. They're still on "Hitler" time (for those who don't know: these four countries were forced onto central Europe time (GMT+1) during the occupation in World War 2), who knows why they're still on it.
The Spanish government is allegedly considering finally reverting to GMT.