British summer time dates from the horse's mouth

Arthur David Olson ado
Mon Jul 17 18:39:20 UTC 1989


Here's a note I received last week, quoted with permission.
A new "europe" file should follow shortly, reflecting at least the
1990, 1991, and 1992 information.

				--ado

> From ncifcrf!@NSFnet-Relay.AC.UK:@cs.heriot-watt.ac.uk:peter at memex.co.uk Thu Jul 13 09:48:05 1989
> Return-Path: <ncifcrf!@NSFnet-Relay.AC.UK:@cs.heriot-watt.ac.uk:peter at memex.co.uk>
> Received: from ncifcrf.UUCP by elsie (4.0/SMI-4.0)
> 	id AA09957; Thu, 13 Jul 89 09:48:03 EDT
> Received: from NSFnet-Relay.AC.UK by fcs280s.ncifcrf.gov (4.0/NCIFCRF-1.0)
> 	id AA25601; Thu, 13 Jul 89 04:54:06 EDT
> Received: from cs.heriot-watt.ac.uk by NSFnet-Relay.AC.UK   via Janet with NIFTP
>            id aa01688; 13 Jul 89 9:17 BST
> Received: by doc.memex.co.uk (5.54/memex_12)
> 	id AA20380; Tue, 4 Jul 89 10:30:35 BST
> Date: Tue, 4 Jul 89 10:30:35 BST
> From: Peter Ilieve <ncifcrf!NSFnet-Relay.AC.UK!peter%memex.co.uk>
> Message-Id: <8907040930.AA20380 at doc.memex.co.uk>
> To: fcs280s!ado
> Subject: British summer time dates from the horse's mouth
> Status: RO
> 
> >From the UK Government paper "Summer Time: A Consultation Document"
> (HMSO Cm722 June 1989), which is about the possibility of the UK moving
> into the central European timezone and synchronising its summer time with
> the rest of Europe (by moving the end date back a month to end Sep.,
> the start dates are already the same).
> 
> Summer time was not observed before 1916.
> It was introduced in the First World War in response to its introduction
> by Germany in March 1916.
> During the Second World War normal summer time was used in Winter and double
> summer time was used in Summer.
> Between 1968 and 1971 GMT+1 was used all year as an experiment.
> This caused voluble objections in Scotland and the experiment was judged
> a failure.
> 
> Although it does not say what happens in Europe, it does say that most
> of Europe did not use summer time until 1979, presumably dropping it
> after the 1st and/or 2nd war.
> 
> Note that this is not necessarily accurate for Eire.
> 
> The paper gives a complete record of dates from 1916, and dates up to 1992.
> The intention is to have the new system, if any, start in 1993.
> The dates are (copied exactly from the table in the paper):
> 
> 	Summer Time			Double Summer Time
> Year	Start		End		Start		End
> 1916	21 May		1 October
> 1917	8 April		17 September
> 1918	24 March	30 September
> 1919	30 March	29 September
> 1920	28 March	25 October
> 			(extended from
> 			27 Sep. because
> 			of coal strike)
> 
> 1921	3 April		3 October
> 1922	26 March	8 October
> 1923	22 April	16 September
> 1924	30 April	21 September
> 1925 to	3rd Sunday	1st Sunday
> 1938	in April	in October
> 
> 1939	16 April	19 November
> 1940	25 February	continued
> 1941	continued	continued	4 May		10 August
> 1942	continued	continued	5 April		9 August
> 1943	continued	continued	4 April		15 August
> 1944	continued	continued	2 April		17 September
> 1945	continued	7 October	2 April		15 July
> 
> 1946	14 April	6 October
> 1947	16 March	2 November	13 April	10 August
> 1948	14 March	31 October
> 1949	3 April		30 October
> 1950	16 April	22 October
> 1951	15 April	21 October
> 1952	20 April	26 October
> 
> 1953	19 April	4 October
> 1954	11 April	3 October
> 1955	17 April	2 October
> 1956	15 April	7 October
> 1957	14 April	6 October
> 1958	20 April	5 October
> 1959	19 April	4 October
> 1960	10 April	2 October
> 
> 1961	26 March	29 October
> 1962	25 March	28 October
> 1963	31 March	27 October
> 1964	22 March	25 October
> 1965	21 March	24 October
> 1966	20 March	23 October
> 1967	19 March	29 October
> 
> 1968	18 February	continued
> 1969	continued	continued
> 1970	continued	continued
> 1971	continued	31 October
> 1972	19 March	29 October
> 1973	18 March	28 October
> 1974	17 March	27 October
> 
> 1975	16 March	26 October
> 1976	21 March	24 October
> 1977	20 March	23 October
> 1978	19 March	29 October
> 1979	18 March	28 October
> 1980	16 March	26 October
> 1981	29 March	25 October
> 
> 1982	28 March	24 October
> 1983	27 March	23 October
> 1984	25 March	28 October
> 1985	31 March	27 October
> 1986	30 March	26 October
> 1987	29 March	25 October
> 1988	27 March	23 October
> 
> 1989	26 March	29 October
> 1990	25 March	28 October
> 1991	31 March	27 October
> 1992	29 March	25 October
> 
> These dates agree with the ones from Whitaker's Almanac for 1960--87
> you quoted in your latest posting of the tzone stuff.
> 
> If we do go into the CET zone then you will have one less thing to worry
> about in future.
> 
> 	Peter Ilieve		peter at memex.co.uk
> 
> 



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