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Time Zone in London, England, United Kingdom

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7:32:15 pm BST

Friday, August 15, 2025

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Current: BST — British Summer Time
Next Change: GMT — Greenwich Mean Time
Current Offset: UTC/GMT +1 hour
Difference: 5 hours ahead of Columbus
Location of LondonLocation

2025 Time Zones - London

Jan
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The graph above illustrates clock changes in London during 2025.

London in GMT Time Zone

London uses Greenwich Mean Time (GMT) during standard time and British Summer Time (BST) during Daylight Saving Time (DST), or summer time.

The Difference between GMT and UTC

In practice, GMT and UTC share the same time on a clock, which can cause them to be interchanged or confused. However, there is an essential difference between the two:

  • UTC is a time standard that forms the base of time zones worldwide and is not used as a time zone in any country. Time zones are defined by their offsets from UTC. Since GMT has a UTC offset of zero, there is no time difference between the two.
  • GMT is a time zone used in the UK and other European and African countries.

A source of confusion is that GMT used to be the world's time standard before UTC was introduced. Until 1972, time zones were defined by their offset from GMT based on mean solar time at the prime meridian in Greenwich near London.

What About BST?

During Daylight Saving Time, clocks in the United Kingdom are set forward one hour to British Summer Time (BST). The UK is the only country that observes BST in the summer. Some other countries, such as Ireland, observe the same local time, but under a different name.

Time Changes in London Over the Years

Daylight Saving Time (DST) changes do not necessarily occur on the same date every year.

YearDate & TimeAbbreviationTime ChangeOffset After
1943Sun, Apr 4 at 2:00 amBSTBDST+1 hour (DST increasing)UTC+2h
 Sun, Aug 15 at 3:00 amBDSTBST-1 hour (DST decreasing)UTC+1h
1944Sun, Apr 2 at 2:00 amBSTBDST+1 hour (DST increasing)UTC+2h
 Sun, Sep 17 at 3:00 amBDSTBST-1 hour (DST decreasing)UTC+1h
1945Mon, Apr 2 at 2:00 amBSTBDST+1 hour (DST increasing)UTC+2h
 Sun, Jul 15 at 3:00 amBDSTBST-1 hour (DST decreasing)UTC+1h
 Sun, Oct 7 at 3:00 amBSTGMT-1 hour (DST end)UTC
1946Sun, Apr 14 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 6 at 3:00 amBSTGMT-1 hour (DST end)UTC
1947Sun, Mar 16 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Apr 13 at 2:00 amBSTBDST+1 hour (DST increasing)UTC+2h
 Sun, Aug 10 at 3:00 amBDSTBST-1 hour (DST decreasing)UTC+1h
 Sun, Nov 2 at 3:00 amBSTGMT-1 hour (DST end)UTC
1948Sun, Mar 14 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 31 at 3:00 amBSTGMT-1 hour (DST end)UTC
1949Sun, Apr 3 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 30 at 3:00 amBSTGMT-1 hour (DST end)UTC
1950Sun, Apr 16 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 22 at 3:00 amBSTGMT-1 hour (DST end)UTC
1951Sun, Apr 15 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 21 at 3:00 amBSTGMT-1 hour (DST end)UTC
1952Sun, Apr 20 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 26 at 3:00 amBSTGMT-1 hour (DST end)UTC
1953Sun, Apr 19 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 4 at 3:00 amBSTGMT-1 hour (DST end)UTC
1954Sun, Apr 11 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 3 at 3:00 amBSTGMT-1 hour (DST end)UTC
1955Sun, Apr 17 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 2 at 3:00 amBSTGMT-1 hour (DST end)UTC
1956Sun, Apr 22 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 7 at 3:00 amBSTGMT-1 hour (DST end)UTC
1957Sun, Apr 14 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 6 at 3:00 amBSTGMT-1 hour (DST end)UTC
1958Sun, Apr 20 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 5 at 3:00 amBSTGMT-1 hour (DST end)UTC
1959Sun, Apr 19 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 4 at 3:00 amBSTGMT-1 hour (DST end)UTC
1960Sun, Apr 10 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 2 at 3:00 amBSTGMT-1 hour (DST end)UTC
1961Sun, Mar 26 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 29 at 3:00 amBSTGMT-1 hour (DST end)UTC
1962Sun, Mar 25 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 28 at 3:00 amBSTGMT-1 hour (DST end)UTC
1963Sun, Mar 31 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 27 at 3:00 amBSTGMT-1 hour (DST end)UTC
1964Sun, Mar 22 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 25 at 3:00 amBSTGMT-1 hour (DST end)UTC
1965Sun, Mar 21 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 24 at 3:00 amBSTGMT-1 hour (DST end)UTC
1966Sun, Mar 20 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 23 at 3:00 amBSTGMT-1 hour (DST end)UTC
1967Sun, Mar 19 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 29 at 3:00 amBSTGMT-1 hour (DST end)UTC
* All times are local London time.

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London
United Kingdom
7:3215pm
Friday, August 15, 2025