Europe · Northern Europe · Sovereign state
Current time in United Kingdom
A single time zone at UTC+01:00. Currently observing daylight saving time.
Wednesday, October 14, 2026
About United Kingdom's time
A single time zone.
The UK observes a single time zone and follows Daylight Saving Time, switching between GMT in winter and BST in summer.
Next clock change
2026 Sunday · clocks fall back
Clocks fall back by one hour · next week.
Daylight saving schedule
Major cities
Cities of United Kingdom.
Territories & dependencies
The Republic, around the world.
History
How United Kingdom keeps time.
The United Kingdom's modern time zone history begins with the standardization of time across the country in the 19th century, replacing local mean time.
**Adoption of Greenwich Mean Time (GMT):** Before the advent of railways, every town in Britain kept its own local time based on the sun's position. As rail travel expanded in the 1840s and 1850s, the need for a unified time became critical. Railway companies began adopting London time (GMT) for their schedules. The Railway Clearing House recommended a standardized time as early as 1847, and by 1855, most public clocks across Britain were set to GMT, though it wasn't legally standardized until the Statutes (Definition of Time) Act 1880 formally established GMT as the legal time for all of Great Britain.
**British Summer Time (BST):** During World War I, Germany introduced daylight saving time in 1916 to conserve coal. Britain quickly followed suit. The Summer Time Act 1916 introduced BST (GMT+01:00), advancing clocks by one hour during summer months. This was primarily an energy-saving measure. The practice continued in various forms after the war, with the Summer Time Act 1925 making the annual change permanent.
**Year-round BST (1968–1971):** In 1968, the British government conducted an experiment, keeping BST year-round. This trial was intended to align the UK's time zone with Central European Time and reduce road accidents during darker winter evenings. However, after mixed results and complaints from northern regions about very late winter sunrises, the experiment ended in 1971, and the country returned to the GMT/BST cycle.
Did you know?
Things about United Kingdom's time.
While the UK has just one official time zone, the practice of switching between GMT and BST has created unique practical quirks in daily life.
**Solar Time vs. Clock Time:** London sits almost exactly on the Greenwich meridian, so solar noon there falls between about 11:44 and 12:14 GMT through the year, or around 13:00 during BST. Places further west, such as Belfast, see solar noon up to about 25 minutes later.
**UK Territories:** While mainland Britain observes GMT/BST, several British Overseas Territories maintain their own time zones. For instance, Gibraltar follows Central European Time, the British Indian Ocean Territory is at UTC+06:00, and the Pitcairn Islands operate at UTC-08:00.
**Late Sunsets in Summer:** During BST, the UK experiences very late sunsets, with sunlight often lasting until 21:00 or later in June and July. This significantly impacts daily life, with many outdoor activities, sports events, and social gatherings scheduled much later than in many other European countries.
Convert
United Kingdom to the world's clocks.
Frequently asked questions
Common questions about United Kingdom's time zone, daylight saving rules, and how to handle it in software. Can't find what you need? Email [email protected].
- What time zone does London use?
- During standard time, London operates on Greenwich Mean Time (GMT), which is UTC+00:00. When Daylight Saving Time is active, it switches to British Summer Time (BST), which is UTC+01:00.
- When does the UK switch to BST?
- The UK switches to British Summer Time on the last Sunday in March, advancing the clocks by one hour at 01:00 GMT. It switches back to GMT on the last Sunday in October, moving clocks back by one hour at 02:00 BST.
- Does the whole UK share the same time zone?
- Mainland Great Britain and Northern Ireland share a single time zone. However, British Overseas Territories like Gibraltar, the British Indian Ocean Territory, and the Pitcairn Islands follow their own distinct time zones.
- How many hours ahead is the UK of New York?
- The UK is usually 5 hours ahead of New York. Because the U.S. changes clocks on different dates, the gap shrinks to 4 hours for two to three weeks in March and for about a week around late October and early November.
- What happened during the 1968–1971 BST experiment?
- In 1968, the UK government tested year-round BST to potentially reduce accidents and align with Central Europe. The experiment was deemed unsuccessful due to dark winter mornings in northern parts of the country, and the traditional GMT/BST cycle was restored in 1971.
- Is there any debate about staying on BST permanently?
- Yes, there has been ongoing debate and parliamentary bills regarding the adoption of permanent BST (essentially moving the UK to UTC+01:00 year-round) to benefit evening leisure and reduce energy consumption, but none has been enacted.
- What was the historical significance of GMT?
- GMT was established as the world's standard time reference after the International Meridian Conference in 1884, based on the Royal Observatory in Greenwich, London. GMT remained the global baseline for time zones until Coordinated Universal Time (UTC) replaced it in 1972.
- What is the UTC offset of the UK's overseas territories?
- The territories span a wide range, including UTC-08:00 in the Pitcairn islands, UTC-05:00 in the Turks and Caicos, UTC+00:00 in St Helena, UTC+01:00 in Gibraltar, and UTC+06:00 in the British Indian Ocean Territory.
Source: IANA tzdb2026d · Reviewed
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