GMT: Greenwich Mean Time - World Time / Time in every Time Zone


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USA, Canada clocks on Daylight Saving Time until Sunday 2 November 2014 at 2am local time
Europe: Clocks on Summer Time until Sunday 26 October 2014 at 01:00 (1am) GMT
UK Clocks on British Summer Time (BST) until Sunday 26 October 2014 at 01:00 (1am) GMT


Greenwich Mean Time

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GMT

Greenwich Mean Time (GMT)

Greenwich Time / Zulu Time / UTC

What's the Time in the World's Major Cities?

What's the Time in every country in the World?

Welcome to Greenwich2000, the website where we talk about Time.

As the earth turns towards the southern summer and the northern winter we prepare to move our clocks forward or back. Don't forget to check here to catch up with all zone time settings.

Why are we as a species so determined to record time accurately?

Archaeology indicates that humans have used their knowledge of the heavens to measure time for thousands of years. The Sun's annual solstices and equinoxes gave reliable points for mapping the year and the constellations provided useful markers.

Different societies had their own reasons for dividing the day into hours, and the 24 hour day was used in Europe in the Classical period. Perhaps an important influence on marking the European day was the 6th Century Rule of St Benedict used in Christian monasteries. Monks gathered for prayer at set times each day.

For 1300 years people used local time so that, wherever you were,the sun was due east at 6 am, due south at noon and due west at 6pm. Greenwich Observatory initiated standard time when the line of zero longitude was set there. However, it took the need for accurate railway timetables to persuade the rest of the country to adopt Greenwich Mean Time. And it was only in 1884 that a treaty gave international agreement to using GMT as a standard.

These days we have an internationally agreed measure for time, the Universal Time Clock which is fine-tuned by scientific precision. But here in the UK we still use the old names and, as the autumn leaves are falling we leave British Summer Time behind and return to GMT on 26th October.

Learn more

What is GMT?

The international agreement - UTC

Greenwich Royal Observatory

What is GMT?

GMT is an absolute time reference & doesn't change with the seasons.

For current London Time click here

What's the time in the GMT time zone now?

Current time clock  GMT (opens in new window)

UK Time: London Time

London Time is the same as Greenwich Mean Time less than half of the year.  During Summer Time (Daylight Saving Time), London Time is GMT+1, also known as British Summer Time (BST).

UK clocks will be on Greenwich Mean Time (GMT)
from 01:00 GMT Sunday 26 October 2014
 until 01:00 GMT Sunday 29 March 2015

What's the current London time now?

Current time clock  UK Time (opens in new window)

What is GMT?

Greenwich Mean Time (GMT) was established in 1884 at the International Meridian Conference, when it was decided to place the Prime Meridian at Greenwich, England.

Short URL: GMT247.com / Twitter: @GMT247

News:

Philippines Typhoon

UNICEF: Your donation today could help us give life-saving support to a child affected by Typhoon Haiyan, or provide support in their community during the aftermath.

 Click here to donate


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Greenwich Mean Time (GMT)

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Greenwich Mean Time (GMT)

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GMT: Greenwich Mean Time - World Time / Time in every Time Zone