Why did every town once set its own noon?
A passenger stepping off the Brussels train in 1840 entered a city that ran on its own clock. Noon in Brussels was 12:04 in Paris and 11:58 in Amsterdam. Nobody cared. Without fast transport, a few minutes of difference between towns was invisible.
Each place set its clocks by the sun. When the sun stood directly overhead, it was noon. Every town kept its own local time. The system worked for centuries because nobody travelled fast enough to notice the gaps.
When did railways kill local solar time across Europe?
The Great Western Railway in Britain adopted "London Time" in 1840. Other British railway companies followed. By the 1850s, railway timetables across Britain used a single time. Local town clocks still showed solar time, but the trains answered to one standard.
The same problem hit continental Europe hard. A train from Paris to Strasbourg had to publish departure and arrival times that passengers could understand across multiple local times. Railway companies began imposing their own standard times. Each company chose a different reference. Timetables became a mess of competing railway clocks.
Who decided Greenwich would rule European clocks?
In October 1884, delegates from 25 nations met in Washington, D.C. The goal: settle the world's time zones on a single system. The conference established the Greenwich Meridian as the prime meridian, the zero line for longitude and time.
Britain had already mapped most of the world's oceans using Greenwich as the reference. The conference made that choice official. It divided the world into 24 time zones, each 15 degrees of longitude wide, centred on Greenwich. The system gave the planet UTC+0 as its reference point.
Why did Germany pick CET and France resist GMT?
Germany was the first major European power to adopt a unified time zone across its territory. In 1893, the German Empire adopted Central European Time, UTC+1, for the entire nation. Before that, German states kept different local times. The railway network needed one standard, and CET became that standard. The decision still shapes the continent's clocks.
France took a different path. In 1911, France adopted Paris Mean Time retarded by 9 minutes and 21 seconds, effectively aligning with Greenwich Mean Time. French clocks showed the same time as London, but the law still referred to Paris Mean Time. France did not formally adopt GMT as its legal time until 1978.
The map of European time zones today still reflects these early decisions. Nations that aligned with Germany in the 1890s use CET. Nations that aligned with Britain use Western European Time, UTC+0.
How did wartime fuel shortages give Europe summer time?
William Willett published a pamphlet in 1907 called "The Waste of Daylight". He argued that Britain was wasting morning daylight while people slept. His idea: advance clocks in summer so people had more evening light.
Nobody adopted his idea until war demanded fuel savings. Germany and Austria-Hungary became the first nations to adopt daylight saving time on 30 April 1916. Britain followed in May 1916. Most of Europe adopted DST during World War I, abandoned it after the war, then revived it during World War II.
The oil crisis of 1973 to 1974 prompted widespread European DST adoption again. By the late 1970s, most European nations used summer time. They set different start and end dates. A flight from London to Paris might cross a DST border on a different weekend.
How did Brussels stop the summer time chaos?
Before 1980, European nations set DST dates independently. The result was chaos for transport, broadcasting, and business. A train timetable that worked in March in France might not work in Germany because the two nations changed clocks on different dates.
The first EU directive on summer time came in 1980. Directive 80/737/EEC coordinated the start and end dates of DST across member states. The current framework, Directive 2000/84/EC, has been in force since 2001. It mandates that all EU member states switch to summer time on the last Sunday of March at 01:00 UTC and back to standard time on the last Sunday of October at 01:00 UTC. The European Commission sets the harmonised schedule.
Today, non-EU European nations including the United Kingdom, Norway, and Switzerland voluntarily align with the EU DST schedule. The directive created a single European summer time that covers most of the continent.
Why did Moscow, Ankara and Minsk abandon the clock change?
Not all European nations follow the EU framework. Russia moved to permanent DST in 2011, then switched to permanent standard time in 2014. Moscow now uses UTC+3 year-round with no clock changes. The Russian government sets the nation's 11 time zones.
Turkey abandoned DST in 2016 and stays on UTC+3 year-round. Belarus did the same after 2011. Iceland has used UTC+0 year-round since 1968, despite its geographic location near 22 degrees west longitude. The Icelandic government sets that policy.
These nations are exceptions. The rest of Europe still changes clocks twice a year. The EU proposal to abolish seasonal clock changes has stalled since 2019. The European Parliament voted in March 2019 to end DST by 2021, but the Council of the EU has not agreed on a position. As of 2026, no implementation date exists. For the latest status, check the European Council's transport and telecommunications configuration page.
What this history means for you today
If you schedule a meeting across European time zones, remember that CET is the business lingua franca. Most multinationals are headquartered in the CET zone. A call at 10:00 CET works for London at 09:00 GMT, Paris at 10:00 CET, and Helsinki at 11:00 EET.
If you travel, remember that Spain uses CET despite being geographically aligned with Western European Time. Francisco Franco aligned Spain with Nazi Germany in 1940, and the nation never reverted. Portugal uses WET, so Lisbon is one hour behind Madrid even though the cities sit at similar longitudes.
If you are developing software that handles European time, use the IANA time zone database. The zones Europe/London, Europe/Paris, Europe/Berlin, and Europe/Moscow are the canonical references. Do not hardcode DST dates. The EU directive may change, and Russia has already changed twice in a decade.
If you are a traveller booking a flight or a train, check the time zone of your destination, not just the nation. The Canary Islands are one hour behind mainland Spain. The Azores are one hour behind mainland Portugal. Cyprus has two time zones: the Republic observes EET/EEST, and Northern Cyprus follows Turkey on UTC+3 year-round.