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Time Zone in London, England, United Kingdom in 1916

11:23:14 am BST

Sunday, September 25, 2022

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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 Washington DC
Location of LondonLocation

1916 Time Zones - London

Jan
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May
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The graph above illustrates clock changes in London during 1916.

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
1900 — 1915No changes, UTC all of the period
1916Sun, May 21 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 1 at 3:00 amBSTGMT-1 hour (DST end)UTC
1917Sun, Apr 8 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Mon, Sep 17 at 3:00 amBSTGMT-1 hour (DST end)UTC
1918Sun, Mar 24 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Mon, Sep 30 at 3:00 amBSTGMT-1 hour (DST end)UTC
1919Sun, Mar 30 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Mon, Sep 29 at 3:00 amBSTGMT-1 hour (DST end)UTC
1920Sun, Mar 28 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Mon, Oct 25 at 3:00 amBSTGMT-1 hour (DST end)UTC
1921Sun, Apr 3 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Mon, Oct 3 at 3:00 amBSTGMT-1 hour (DST end)UTC
1922Sun, Mar 26 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Oct 8 at 3:00 amBSTGMT-1 hour (DST end)UTC
1923Sun, Apr 22 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Sep 16 at 3:00 amBSTGMT-1 hour (DST end)UTC
1924Sun, Apr 13 at 2:00 amGMTBST+1 hour (DST start)UTC+1h
 Sun, Sep 21 at 3:00 amBSTGMT-1 hour (DST end)UTC
* All times are local London time.

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London
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11:2314am
Sunday, September 25, 2022