World Time Starts Here

London Time

London , the capital of the United Kingdom, is on Greenwich Mean Time (GMT) only during winter months. The GMT timezone has the same hour offset (GMT+0) as the Western European Time Zone . When Daylight Saving Time starts, London is on British Summer Time (BST), which is GMT+1.

London follows European Clock Change Dates

European clocks are now on


When do clocks next change in Europe?

  • Daylight saving start: Sunday 26 March 2017  01:00 GMT. Clocks go forward one hour.
  • Daylight saving end: Sunday 29 October 2017  01:00 GMT.Clocks go back one hour.

UK and Europe Clock Change Rules

What happens to UK clocks in summer?

At the start of the Daylight Saving period, clocks are adjusted forward by 1 hour, ahead of Greenwich Mean Time.

The City of London and St. Pauls Cathedral at night
The City of London and St. Pauls Cathedral at night

What happens to UK clocks in winter?

After the summer months clocks are shifted shifted back by 1 hour back to GMT.

GMT and Greenwich - a brief history

London's history can be explored in the iconic Museum of London .

Greenwich was a royal park and palace on a hill to the south of the River Thames, east of London.

In 1675 the great race to create accurate maps for navigators had begun and Charles II offered the land to The Royal Society for Britain's first national observatory. Christopher Wren was commissioned to design the domed building and John Flamsteed was appointed the Astronomer Royal.

British mapmakers began to set Longitude from Greenwich. In 1884 the International Meridian Conference decided that the meridian passing through the main transit instrument at The Royal Observatory in Greenwich would become the Prime Meridian.

Every 15° longitude represents one hour's difference in time: (24 x 15 = 360, the degrees of a circle). You can work out the time at every location on earth if you know how many degrees it is east or west of Greenwich.

The fastest way would be of course the GMT Time Converter : choose a place and view the local time instantly! Just one tab away you will find other useful time tools, where you can customize your preferred clocks, decide on a mutually agreeable meeting time and even see the dark side of Planet Earth!

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