When Do The Clocks Go Forward In 2026 & Why?

In 2026, the clocks in the UK go forward on Sunday 29 March at 1 am, marking the start of British Summer Time (BST). At that moment, 1:00 am becomes 2:00 am, meaning we lose an hour of sleep but gain lighter evenings. The change always takes place on the last Sunday in March and is intended to make better use of natural daylight. Later in the year, the clocks go back on Sunday 25 October 2026.

When the clocks go forward, the UK shifts from Greenwich Mean Time (GMT) to British Summer Time (BST), effectively moving one hour ahead. This creates brighter evenings and slightly darker mornings, a trade-off that supports longer daylight hours when most people are awake. While the adjustment is small, it can briefly affect sleep patterns and daily routines. Most people notice feeling a little groggy for a day or two as the body clock recalibrates.

The UK changes the clocks to maximise usable daylight during the spring and summer months. The concept was formally introduced with the Summer Time Act of 1916, partly to reduce energy consumption. Longer evenings were believed to support productivity, leisure, and overall wellbeing. Today, the system remains in place largely for lifestyle, economic, and social reasons rather than purely energy savings.

Most modern devices, including smartphones, laptops, smart TVs, and many cars, update automatically. Internet-connected systems synchronise with time servers, so you usually don’t need to do anything. However, analogue clocks, ovens, and some vehicles may still need manual adjustment. It’s always worth double-checking before Monday morning.

In March, we lose an hour when the clocks go forward, hence the phrase “spring forward”. Yes, the lost hour can sting, and most people may feel a bit tired, but you can adjust and enjoy the lighter evenings. In October, we gain an hour when the clocks go back. A simple way to remember this is: spring forward, fall back.

While losing an hour of sleep rarely sparks celebration, British Summer Time does bring some genuine upsides:

1. Lighter evenings: Longer daylight hours mean more time outdoors, socialising, and exercising after work. Evenings feel more productive, less rushed, and you feel like you have more time to spend as you wish.
2. Potential wellbeing boost: Increased exposure to natural daylight can positively influence mood and energy levels, and later in spring and summer may support vitamin D production.
3. More opportunity for physical activity: Brighter evenings often encourage people to walk, cycle, or enjoy outdoor activities.
4. You’ll naturally wake up: Waking up during dark winter mornings can feel like a daily battle because your circadian rhythm is influenced by natural daylight. As spring progresses and mornings gradually become lighter, increased daylight helps regulate melatonin production.
5. Reduced reliance on artificial lighting: Extended daylight may contribute to lower evening energy usage in homes and businesses.
6. Psychological signal of seasonal change: For many, the clock change marks the symbolic start of spring and the promise of warmer months ahead.

Even though it’s just a one-hour change, losing sleep can leave you feeling groggy for a few days. Here’s how to make the transition smoother:

• Shift your bedtime gradually: Going to bed 10-15 minutes earlier for a few nights beforehand can help your body adjust more comfortably.
• Prioritise morning daylight: Exposure to natural light helps regulate your circadian rhythm and improves alertness.
• Limit caffeine later in the day: Reducing stimulants can help prevent difficulty falling asleep after the shift.
• Limit screens before bed: At least an hour before bedtime, limit phone usage or watching TV, as these can interfere with melatonin and make it harder to go to sleep
• Keep your sleep routine consistent: Regular sleep and wake times support faster adjustment. As tempting as it might be, lying in on Sunday after the clock change can make it harder to adjust.
• Double-check alarms and manual clocks: Most devices update automatically, but ovens, cars, and analogue clocks may need attention.

So, on the 29th of March 2026 at 1 am, the clocks will go forward, springing the UK into British Summer Time. Yes, we lose an hour of sleep. Yes, it can feel slightly disorientating. But British Summer Time delivers longer, lighter evenings, something most of us welcome after a long winter. A small change on the clock, but a noticeable change in how the days feel.