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Summer time and double summer time in the UK, 1940-6
by Joseph S. Myers Sept. 2, 2000

Sept. 2, 2000

I may have mentioned before that the records of summer time in the UK from 1940 to 1946 in the Public Record Office were subject to a 100 year extended closure period. After I requested the Home Office to review this extended closure period in February, they concluded after three months that the records could be opened to the public in their entirety (rather than needing to wait until 2047), and after a further three months for the administrative procedure of actually opening them, they recently became available. I examined them (HO 144/22703 and HO 144/22704) yesterday. They serve to confuse the question of whether the double summer time applied was BDST or DBST; both appear in the records, so Howse's DBST needn't be a typo. On 18th April 1941, Sir Stephen Tallents of the BBC wrote to Sir Alexander Maxwell of the Home Office asking whether there was any official designation; the reply of the 21st was that there wasn't but he couldn't think of anything better than the "Double British Summer Time" that the BBC had been using informally. I've put a copy of the Home Office letter at http://student.cusu.cam.ac.uk/~jsm28/british-time/ho-19410421.png and the BBC letter may follow if I get permission from the BBC. The files contain many objections from irate clergymen to the start of double summer time on Easter Sunday in 1942; one entitled "Pilate---Pharaoh---1942" referring to "Scripture history is being repeated this year through decisions of the Government"; another to "the tyrants of Whitehall, who probably never attend church, & even possibly have never heard of Easter". There are also many newspaper clippings (mainly from Scottish papers) objecting to double summer time in general. -- Joseph S. Myers jsm28(a)cam.ac.uk

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FW: Looking for TZ list
by Olson, Arthur David (NCI) Aug. 30, 2000

Aug. 30, 2000

David Feig is not on the time zone mailing list; direct replies appropriately. --ado > -----Original Message----- > From: David Feig [SMTP:david@postinicorp.com] > Sent: Thursday, August 24, 2000 10:48 PM > To: tz(a)elsie.nci.nih.gov > Subject: Looking for TZ list > > I'm looking for a (complete) list of TZ strings in the format like: > > PST8PDT7,116/2:00:00,298/2:00:00 > > Can anyone give me a pointer? > > Please respond directly to me, as I am not on the mailing list. > > Thanks. > > -- David Feig

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Kentucky county switching time zones
by Rich Wales Aug. 30, 2000

Aug. 30, 2000

After prolonged debate, and despite continuing deep differences of opinion, Wayne County (central Kentucky) is switching from Central (-0600) to Eastern (-0500) time. They won't "fall back" this year when daylight savings time ends in the US on 29 October 2000. Wayne County residents have strong links to nearby Kentucky cities in the Eastern time zone. The time difference has frequently led to scheduling mixups. <http://www.nandotimes.com/nation/story/body/0,1037,500244845-500362432-5021…> Rich Wales richw(a)webcom.com http://www.webcom.com/richw/

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discrepancies between tz data and official Canadian time zone site
by Paul Eggert Aug. 30, 2000

Aug. 30, 2000

I'm sending this email both to the Time Zone mailing list <tz(a)elsie.nci.nih.gov> (see <http://www.twinsun.com/tz/tz-link.htm> for more) and to the INMS feedback alias <questions.inms(a)nrc.ca>, as it seems appropriate for both. INMS, the Institute for National Measurement Standards in Ottawa publishes the following information about standard and daylight saving time zones in Canada: http://www.nrc.ca/inms/time/tze.html (home page) http://www.nrc.ca/inms/images/time/Tz99weB.jpg (standard time, 400 kB) http://www.nrc.ca/inms/images/time/Tz99seB.jpg (daylight saving time, 400 kB) http://www.nrc.ca/inms/faq/time.html#daylight The above web pages report the following information about times since 1988 that disagree with the tz data: * Newfoundland and New Brunswick switch at 00:01 local time, not 02:00. * Manitoba switches from CDT to CST at 03:00 local time, not 02:00. Since this reference seems authoritative, I'm inclined to believe these claims and propose the corresponding changes to the tz data, unless somebody suggests otherwise. This will require creating a new tz Zone entry for New Brunswick; normally this would be America/Saint_John but that's confusing given that there already is an America/St_Johns, so perhaps America/Moncton is a better name. Also, the INMS maps show both "legislated time zone boundaries" and "observed time zones", with the following differences. * British Columbia officially observes PST/PDT, but some parts of east BC observe MST/MDT, and other parts observe MST all year (presumably the America/Dawson_Creek zone of the tz data). * A small area of east Saskatchewan observes CST/CDT, not CST. * A small part of Ontario east of the -90 meridian observes CST/CDT even though it's supposed to observe EST/EDT. Another small part west of -90 observes EST/EDT even though it's supposed to observe CST/CDT. And a third small part west of -90 observes EST all year. * Officially, Quebec east of the -63 meridian is supposed to observe AST all year. But nobody observes this. The western part of east Quebec observes EST/EDT; the eastern part observes AST/ADT. * Most of Labrador observes AST/ADT, even though it's officially supposed to observe NST/NDT. The observed time zones are all covered by existing tz entries, except for the part of Ontario that observes EST all year. Does anybody know more about where that is and how long they've observed EST? The maps don't mention the Baffin time zone rebels reported at length on the tz list. I'll mention the following URL for the benefit of the INMS: http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html

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New Daylight Savings changes for Sydney, Australia.
by Burtenshaw, Craig Aug. 28, 2000

Aug. 28, 2000

Hi, With the Olympics being here in a few weeks, we have started Daylight Savings early. However, I am trying to work out how to alter the australiasia Time zone file In /usr/share/lib/zoneinfo to start the Daylight Savings NOW and end as per normal. I was thinking of putting an entry into the file as such: Rule Aus 2000 only - Aug 25 2:00 1:00 Secondly an Entry in the New South Wales area of Rule AN 2000 only - Aug 25 2:00s 0 Finally an entry in the Zone Australia/Sydney as below Zone Australia/Sydney GMTOFF RULES FORMAT [UNTIL] 10:00 Aus EDST 2000 Aug 25 2:00s Of should the last entry be 10:00 Aus EST 2001 Mar lastsun 2:00s Would this alter the system clock appropriately ?? Or could please you give me some information on how to alter the daylight savings date? Thankyou Craig Burtenshaw ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Craig Burtenshaw Unix Systems/Oracle Database Administrator Information Technology Australian Maritime Safety Authority (AMSA) P.O. Box 2181 Canberra City ACT 2601 Level 2, 25 Constitution Ave Canberra City ACT 2601 Ph : 61+ (0) 2 6279 5824 Fax : 61+ (0) 2 6279 5024 E-Mail : mailto:Craig.Burtenshaw@amsa.gov.au AMSA Web site : http://www.amsa.gov.au ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Why is it that if someone tells you that there are 1 billion stars in the universe you will believe them, but if they tell you a wall has wet paint you will have to touch it to be sure?

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Looking for TZ list
by David Feig Aug. 25, 2000

Aug. 25, 2000

I'm looking for a (complete) list of TZ strings in the format like: PST8PDT7,116/2:00:00,298/2:00:00 Can anyone give me a pointer? Please respond directly to me, as I am not on the mailing list. Thanks. -- David Feig

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Please add me to mailing list for Time Zone and DST corrections
by Allen, David Aug. 23, 2000

Aug. 23, 2000

Please add me to mailing list for Time Zone and DST corrections Thanks, David E. Allen Timex Middlebury CT

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The science of timekeeping
by Oscar van Vlijmen Aug. 19, 2000

Aug. 19, 2000

August 11 Paul Eggert wrote: > Dennis D. McCarthy and William J. Klepczynski's proposal to do away > with leap seconds, originally published in GPS World last November, is > now available on the Web in PDF form.... This is an interesting article. On the last page you will find a couple of references to other articles, one of which is "The science of timekeeping" by Allan, Ashby, Hodge; Hewlett-Packard Application Note 1289. The URL isn't valid anymore, but I found the current URL: http://www.tm.agilent.com/classes/MasterServlet?view=applicationnote&apn-Ite mID=1000000363&language=eng&locale=US >From the annotation: "... brings together the history and the science of today's hyperfine timekeeping benefits, needs, and expectations. [...] this application note promises to be a classic reference for decades to come." In my opinion: 88 pages of very useful information. The URL given above will link to a PDF file, which was damaged when I downloaded it. HP couldn't find the problem, but if you experience the same problem, you will find that HP's feedback is willing to provide a solution. Regards, Oscar van Vlijmen 2000-08-19

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Re: EU proposals
by Peter Ilieve Aug. 18, 2000

Aug. 18, 2000

Joseph S. Myers wrote: > I came across this in CELEX: > > http://europa.eu.int/cgi-bin/eur-lex/udl.pl?REQUEST=Seek-Deliver&LANGUAGE=e… > > (a 25 page PDF review of summer time). Make that `DOCID=500PC0302(01)' on the end. The 500PC0303(01) one is 44 pages about the mass influx of displaced persons. Well spotted. The Commission were supposed to produce propsals for a ninth directive before 1 Jan 2000 but they still hadn't done so when I rang my usual contact in their Edinburgh office at the end of February and I hadn't got around to asking again. Proposing something open-ended like this is one in the eye for the French, who were talking about dumping summer time altogether. Peter Ilieve peter(a)aldie.co.uk

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easy question: when dst transition occurs at 00:00 hours...
by Thomas Carey Aug. 16, 2000

Aug. 16, 2000

many locales undergo DST transition at midnight - for instance - on Thu 21 Sept 2000 19:30 - DST will end in Tehran, and local time will go from 00:00->23:00 (actually, from 23:59 to 23:00). My question is whether this extra hour occurs (locally) on thursday or friday. I'd assume thursday, as 00:00 doesn't arrive before the transition. can anyone confirm? thanks tc

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