UK clocks go back on 25 October 2026: what changes at home

By GlobeBids Editorial Team

UK clocks go back on Sunday 25 October 2026. At 2am British Summer Time (BST), the time becomes 1am Greenwich Mean Time (GMT). The change affects everyone using UK local time: mornings will appear lighter by the clock, evenings darker, and some household clocks and travel plans may need checking.

What happens when the clocks go back in October?

The UK uses BST during the warmer part of the year. BST is one hour ahead of GMT. On the last Sunday in October, clocks move back one hour and the UK returns to GMT for the winter months. The UK Government’s clock-change page sets out the dates and explains the relationship between the two time standards.

Read also: UK clocks go back on 25 October 2026: check Sunday travel times

The switch happens overnight, when fewer people are likely to be travelling or working to a fixed daytime schedule. In 2026, the change from 2am BST to 1am GMT means the hour beginning at 1am appears twice on the clock: first under BST, then under GMT. For most households, its clearest effect will be noticeable after waking on Sunday.

The clocks going back do not create an extra hour of daylight. They change the time shown while the seasonal pattern of sunrise and sunset continues. Compared with keeping BST, the return to GMT places more of the available daylight in the clock-defined morning and less in the clock-defined evening.

Why does the UK use BST and GMT?

GMT is the UK’s winter clock time. In spring, clocks move forward to BST, putting local time one hour ahead of GMT. In autumn, they return to GMT. This recurring arrangement changes how daylight lines up with common working, school and leisure hours across the year.

Summer time has been part of UK life for more than a century. Britain introduced it in 1916, during the First World War, amid efforts to make greater use of daylight later in the day. The reasons people discuss clock changes today are broader, but the basic choice remains familiar: shifting the clock changes when daylight falls relative to daily routines.

The October change is the end of the BST period, rather than a change in the sun’s course. GMT gives winter mornings an earlier clock reading than they would have under BST. It also gives winter sunsets an earlier clock reading. That trade-off is especially noticeable as days shorten through autumn.

The UK Government’s rule uses the last Sunday in October for the autumn switch. In 2026, that Sunday is 25 October. The spring change follows a separate rule: clocks go forward on the last Sunday in March, when BST begins again.

How morning and evening light will feel different

Imagine the same patch of morning daylight just before and just after the clock change. Once the clock has gone back, it arrives at an earlier displayed time. A journey that felt dark at a particular departure time on the preceding Friday may feel lighter at that same clock time on Monday, although the exact difference depends on location, weather and the continuing seasonal shift.

The reverse happens at the end of the day. The sunset’s clock time moves roughly an hour earlier at the switch, so a walk home or school pickup at a familiar time may take place in lower light. Daylight keeps decreasing as winter approaches; the clock change simply moves the remaining light within the timetable people use.

Experiences also differ across the UK. Sunrise and sunset vary by place, and the length of the day changes with latitude. The rule for changing clocks is nationwide, but a household’s actual light conditions depend on where it is and when people leave home or return.

That is why the common phrase “an extra hour in bed” describes the clock, not an extra hour of sunlight. The repeated clock hour can make Sunday morning feel longer for someone who sleeps through the switch. It does not guarantee extra sleep for people with work, caring duties or a fixed waking time.

Which clocks and plans are worth checking?

Many connected phones, computers and smart devices update automatically when their time zone is set correctly and automatic time settings are enabled. Manual clocks may need attention. A quick check on Sunday can prevent a small time difference from carrying into Monday’s routine.

• Check analogue wall clocks, oven displays, car clocks and any alarm clock that does not update itself.
• Confirm that phones and other connected devices show the correct UK local time before relying on an alarm.
• If travelling overnight or early on Sunday, use the time printed in the operator’s current timetable or booking information. A service scheduled near the repeated 1am hour may need particular care.
• Recheck appointments with people abroad, because other countries may change clocks on different dates or may not change them at all.

For most people, the practical test is simple: by Sunday morning, UK local time should be GMT, one hour behind the BST reading used before the switch. Before an early journey or appointment on 25 October, check both the device showing the time and the latest details from the service or person you are meeting.

Source: UK Government