World Clocks — Every Time Zone vs UK Time

The UK uses GMT (Greenwich Mean Time, UTC+0) in winter and BST (British Summer Time, UTC+1) in summer. GMT is the baseline from which all world time zones are measured — it is based at the Royal Observatory in Greenwich, London. The switch to BST happens on the last Sunday in March each year.

New York (Eastern Time) is typically 5 hours behind the UK. When the UK is on GMT (winter) and New York is on EST (UTC−5), the difference is 5 hours. During BST (UK summer), the difference can briefly become 4 hours or 6 hours depending on when each country transitions in/out of daylight saving time.

Dubai is on Gulf Standard Time (GST, UTC+4) and does not observe daylight saving time. When the UK is on GMT (winter), Dubai is 4 hours ahead. When the UK switches to BST (summer), Dubai is only 3 hours ahead. Dubai's time never changes throughout the year.

In 2026, UK clocks go forward 1 hour at 1:00am on Sunday 29 March (GMT → BST), and go back 1 hour at 2:00am on Sunday 25 October (BST → GMT). The mnemonic is "spring forward, fall back". BST gives the UK an extra hour of evening daylight through the summer months.

Australia has multiple time zones. Sydney (AEST) is UTC+10 in winter and UTC+11 (AEDT) in summer — typically 10–11 hours ahead of the UK. However, because Australia and the UK have opposite seasons, the offset shifts around clock change dates. Melbourne matches Sydney's time, while Perth (AWST, UTC+8) is usually 8 hours ahead.

Yes. BST (British Summer Time) is equivalent to UTC+1 or GMT+1. It is the same offset as CET (Central European Time), which means the UK and most of Western Europe are on the same clock during UK summer, even though they are in different time zones. BST applies from the last Sunday in March to the last Sunday in October.