Spain is not UTC+1 purely out of convenience. It's because of history https://www.npr.org/sections/parallels/2013/11/30/244995264/spains-been-in-the-wrong-time

Spain is not UTC+1 purely out of convenience. It's because of history https://www.npr.org/sections/parallels/2013/11/30/244995264/spains-been-in-the-wrong-time-zone-for-seven-decades https://www.npr.org/sections/parallels/2013/11/30/244995264/... > So on Oct. 23, 1940, Hitler took a train to the Spanish border to woo Spain's Fascist dictator, Francisco Franco. > But Spain was in ruins from its own Civil War in the late 1930s, and Franco didn't have much to offer. He stayed neutral, but switched Spain's clocks ahead one hour, to be in line with Nazi Germany. > Ever since, even though Spain is geographically in line with Britain, Portugal and Morocco — its clocks are on the same time zone as countries as far east as Poland and Hungary. And the country/politicians are thinking about going back to UTC+0 due to all the problems UTC+1 poses due to geography.