This world clock compares the time in London with a city you choose. It shows both local times and the live relationship between them.
The difference can change across the year because London can be on GMT or BST depending on the date, and other places may also change seasonally.
Compare London with another city
Tip
If you share a result, include the date and write “London” explicitly so it is clear which location the time refers to.
Right now
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If the difference surprises you, it is usually because you are comparing different seasonal rules or you are near a clock-change week.
Extra guidance for safer planning
Most one-hour mistakes come from assuming London is always on GMT. London uses GMT in winter and BST in summer, so the date matters.
If something looks unexpected, check your device time zone settings. A wrong device time zone can make a correct conversion look wrong.
Extra guidance for safer planning
Most one-hour mistakes come from assuming London is always on GMT. London uses GMT in winter and BST in summer, so the date matters.
Most one-hour mistakes come from assuming London is always on GMT. London uses GMT in winter and BST in summer, so the date matters.
Extra guidance for safer planning
Most one-hour mistakes come from assuming London is always on GMT. London uses GMT in winter and BST in summer, so the date matters.
When you share a meeting time, include the date, the time, and the location. If the timing is critical, add the label GMT or BST as well.