European countries using CEST in the summer and CET during the winter
Albania
Andorra
Austria
Belgium
Bosnia-Herzegovina
Croatia
Czech Republic
Denmark (mainland)
France
Germany
Gibraltar
Holy See/Vatican City
Hungary
Italy
Kosovo
Liechtenstein
Luxembourg
Macedonia, Republic of
Malta
Monaco
Montenegro
Netherlands
Norway
Poland
San Marino
Serbia
Slovakia
Slovenia
Spain - except Canary Islands, which are on WET/WEST
Sweden
Switzerland