Clock changes in the UK in 2026

Every March and October, the UK changes its clocks by an hour. Around 69 million people live under the system. The act itself is brief. The effects are not. In 2026, the clocks are still changing. But the case against doing it is now more organised, better evidenced, and harder to dismiss.

When do the clocks change in 2026?

The clocks go forward on Sunday 29 March 2026 and go back on Sunday 25 October 2026.

Public guidance usually puts that as 1am in spring and 2am in autumn. In law, summer time begins at 01:00 GMT on the last Sunday in March and ends at 01:00 GMT on the last Sunday in October.

The UK has used seasonal clock changes since 1916. The modern March and October pattern sits on the Summer Time Act 1972, as amended by the Summer Time Order 2002.

Where the government stands

Nothing has changed at Westminster. Ministers said in late 2025 and again in early 2026 that the current arrangement makes the "optimal use of the available daylight across the UK". They also said they have no plans to move to single or double summertime, and have not carried out fresh impact assessments because they do not intend to change the system.

Public opinion is split, not settled. A YouGov poll in October 2024 found 46% wanted to keep the twice-yearly change and 42% wanted to stop it. If the system were abolished, most people said they would prefer permanent summer time rather than permanent winter time.

This is not a new argument. Rebecca Harris's Daylight Saving Bill would have required a formal review and, if the case stacked up, a trial. It did not become law.

Why the issue is still alive

The EU did not finish what it started. The European Commission's 2018 consultation drew 4.6 million responses, with 84% backing an end to clock changes. The European Parliament voted in 2019 to stop the practice. But the Council never agreed a common position, so the current system stayed in place.

Spain tried to restart the conversation in October 2025, but "live" is a better word than "moving". The proposal is still stalled.

For the UK, this is not just an EU side story. If the Republic of Ireland and the UK ever ended up on different systems, Northern Ireland could face a time border with either Ireland or Great Britain for part of the year. A House of Lords committee said any UK decision made in light of neighbouring countries changing course would "merit careful consideration". Ireland has already said it would oppose any move that risked different time zones on the island.

What the health evidence actually says

This is the part that gets overstated. The cleanest version is that the spring clock change disrupts sleep and circadian timing, and some studies find a short-term shift in the timing of acute health events straight afterwards.

A widely cited Michigan registry study found more PCI-treated heart attacks on the Monday after the spring change, but no rise across the full week. A Finland study found ischaemic stroke admissions were 8% higher in the first two days after a transition, but not significantly higher across the whole week.

The mental-health picture is less tidy. A Denmark registry study found an 11% rise in hospital contacts for unipolar depression after the autumn change. A later England study found small reductions in several recorded outcomes, including depression and sleep disorders, in the week after the autumn change. Those studies measure different things, in different ways. They do not cancel each other out, but they do mean the evidence needs handling with care.

What is clearer is the position of the sleep bodies. The British Sleep Society says the clock changes are adverse to sleep and circadian health and should be scrapped. It favours permanent standard time, in other words GMT year-round, rather than permanent daylight saving time. Its 2024 statement was backed by six other organisations and networks, including the Irish Sleep Society, the British Paediatric Sleep Society, and The Sleep Charity.

Road safety is an evening versus morning trade-off

The case for lighter evenings is real. RoSPA still points to the 1968 to 1971 British Standard Time experiment, when reported casualties in the affected hours fell by 11% in England and Wales and 17% in Scotland. But RoSPA also says that trial overlapped with other major road-safety changes, including roadside breath testing and the 70mph speed limit. So it is evidence, but not clean proof.

More recent GB data suggests the sharper short-term problem comes after the autumn change, not the spring one. RAC Foundation analysis of STATS19 data for 2012 to 2017 found a small fall in personal injury collisions after the spring change, but a larger rise after the autumn change, when evenings suddenly darken. That is the safest UK line now.

Why Scotland keeps stopping this

The political problem has always been winter mornings in the north. On the winter solstice in 2026, sunrise is about 8:42am in Edinburgh, 8:57am in Inverness, and 9:08am in Lerwick. Under permanent BST, those become roughly 9:42am, 9:57am, and just after 10am.

That is why permanent BST keeps running into resistance in Scotland. The trade-off is not dark versus light. In parts of the north, it is dark versus very dark.

The energy case is weaker than it used to be

This was once simple. Use more daylight, use less artificial light. It no longer works that neatly. Official UK reviews have generally found that changing the clock regime would probably have only small effects on total energy use, and even the direction is uncertain. Some modelling suggests a lower evening peak and a higher morning peak.

During the 2022 energy crisis, much bigger savings claims were made, but those were scenario estimates rather than settled official conclusions.

Where this leaves things in 2026

The clocks will still change on 29 March and 25 October. The government has no plans to stop that. The EU has not resolved its own position. Public opinion is split.

But the debate is no longer just a seasonal moan about changing the oven clock. The health case is better organised than it was. The Northern Ireland problem is real. And if Europe ever does move, the UK will have to decide quite quickly whether it wants to stay aligned, or explain why it does not.

How light affects people after the change

The clock changes in a moment. Your body does not. Morning light is one of the main cues that helps reset the body clock, which is why the spring change can feel more disruptive than the neat one-hour shift suggests.

For people who already struggle with print or close work, including the more than two million people in the UK living with sight loss, a run of poorer sleep and darker evenings can make reading feel harder for a while. Good task lighting may help, but the strongest evidence here is still about the value of morning daylight for circadian alignment.