| Time zone | Greenwich Mean Time / British Summer Time (GMT/BST) |
| UTC offset (today) | UTC+01:00 |
| Daylight saving | London moves to BST (UTC+1) on the last Sunday of March and back to GMT (UTC+0) on the last Sunday of October. |
| Business hours | Offices normally run 9:00 to 17:30, and high street banks about 9:30 to 16:30 with limited Saturday opening. Shops open seven days, but large stores may trade only six hours on Sunday under English law. |
| Country | United Kingdom |
London uses GMT only from late October to late March. For the rest of the year the city is on BST, one hour ahead of GMT. Plenty of people write GMT in July invites when they mean London time, which can cause one-hour mistakes for overseas attendees.
Short winter days are a real feature of life here. In late December the sun sets around 15:50 and rises after 8:00. In June it stays light past 21:15. The UK changes clocks on the same day as the EU, so London is always one hour behind Paris and Berlin.
London overlaps with both India and the US East Coast in a single working day, which is why it is a favourite hub. India is 4h30 ahead in summer and 5h30 ahead in winter, so the London morning matches the Indian afternoon.
New York is five hours behind most of the year, giving a shared window from 13:00 to 17:30 London time. For about one week in March and one in late October, when the US and UK change on different Sundays, the gap drops to four hours.
BST (UTC+1) from the last Sunday in March to the last Sunday in October, and GMT (UTC+0) the rest of the year.
On Sunday 25 October 2026 at 2:00 BST, clocks go back to 1:00 GMT.
Yes. The whole UK uses GMT/BST and changes clocks together.
· Written by Om Vaghani, ClockAura