Extra Hour in Bed Tomorrow: What the UK Clock Change Means
UK clocks turn back by one hour at 2am on Sunday, October 25, officially ending British Summer Time (BST) and bringing the country back onto Greenwich Mean Time (GMT). When the clock strikes 2am, it automatically shifts back to 1am, granting an extra hour of sleep overnight while trading evening daylight for brighter mornings.
Big Ben Maintenance and How the Change Works
The twice-yearly shift is built into the calendar by national standard: UK time moves forward by one hour at 1am on the last Sunday in March and drops back by one hour at 2am on the last Sunday in October. The next move forward will happen on Sunday, March 28, 2027.
In London, parliamentary clock mechanics are performing scheduled maintenance on the Great Clock in the Elizabeth Tower, which houses Big Ben. To carry out the work, the clock’s dial lights are switched off from 6pm on Saturday evening, and the hands will not display the accurate time until 2am on Sunday when the official shift takes place.
Most modern internet-connected equipment, including smartphones, laptops, smartwatches, and digital TV set-top boxes, will update automatically overnight as long as auto-time settings are active. Traditional wristwatches, wall clocks, and household kitchen appliances will require manual adjustment on Sunday morning.
Why the UK Shifts Its Clocks Each Autumn
Seasonal clock adjustments date back to the First World War, when Germany first moved its clocks forward in 1916 as a wartime measure to conserve energy. The UK and several other nations adopted the system shortly after to align daily working hours with natural daylight.
While maintaining British Summer Time year-round has been debated to preserve lighter evenings, doing so would create exceptionally dark winter mornings, particularly across northern regions and Scotland. UK policy currently retains the two-change schedule, with no plans underway to abolish the seasonal transition.
Time zone shifts also vary globally. While the UK and much of Europe make the seasonal clock adjustment on October 25 this year, North America will turn its clocks back later, on the first Sunday in November. Many countries across Asia, South America, Oceania, and Africa do not observe daylight saving adjustments at all.
