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*** 89,106 **** # 0:00 GMT BST BDST Greenwich, British Summer # 0:00 GMT IST Greenwich, Irish Summer # 0:00 WET WEST WEMT Western Europe # 0:19:32.13 AMT* NST* Amsterdam, Netherlands Summer (1835-1937) # 1:00 BST British Standard (1968-1971) # 1:00 CET CEST CEMT Central Europe # 1:00:14 SET Swedish (1879-1899) # 1:36:34 RMT* LST* Riga, Latvian Summer (1880-1926)* # 2:00 EET EEST Eastern Europe # 3:00 MSK MSD MDST* Moscow ! # From Peter Ilieve (1994-12-04), ! # The original six [EU members]: Belgium, France, (West) Germany, Italy, # Luxembourg, the Netherlands. # Plus, from 1 Jan 73: Denmark, Ireland, United Kingdom. # Plus, from 1 Jan 81: Greece. # Plus, from 1 Jan 86: Spain, Portugal. # Plus, from 1 Jan 95: Austria, Finland, Sweden. (Norway negotiated terms for --- 89,107 ---- # 0:00 GMT BST BDST Greenwich, British Summer # 0:00 GMT IST Greenwich, Irish Summer # 0:00 WET WEST WEMT Western Europe # 0:19:32.13 AMT* NST* Amsterdam, Netherlands Summer (1835-1937) # 1:00 BST British Standard (1968-1971) + # 1:00 IST GMT Irish Standard (1968-) with winter DST # 1:00 CET CEST CEMT Central Europe # 1:00:14 SET Swedish (1879-1899) # 1:36:34 RMT* LST* Riga, Latvian Summer (1880-1926)* # 2:00 EET EEST Eastern Europe # 3:00 MSK MSD MDST* Moscow ! # From Peter Ilieve (1994-12-04), re EEC/EC/EU members: ! # The original six: Belgium, France, (West) Germany, Italy, # Luxembourg, the Netherlands. # Plus, from 1 Jan 73: Denmark, Ireland, United Kingdom. # Plus, from 1 Jan 81: Greece. # Plus, from 1 Jan 86: Spain, Portugal. # Plus, from 1 Jan 95: Austria, Finland, Sweden. (Norway negotiated terms for
*** 299,318 **** # S.R.&O. 1916, No. 382 and HO 45/10811/312364 (quoted above) say otherwise. # # The following claim by Shanks & Pottenger is possible though doubtful; # we'll ignore it for now. # * Dublin's 1971-10-31 switch was at 02:00, even though London's was 03:00. # ! # ! # Whitman says Dublin Mean Time was -0:25:21, which is more precise than ! # Shanks & Pottenger. ! # Perhaps this was Dunsink Observatory Time, as Dunsink Observatory ! # (8 km NW of Dublin's center) seemingly was to Dublin as Greenwich was ! # to London. For example: # # "Timeball on the ballast office is down. Dunsink time." # -- James Joyce, Ulysses # "Countess Markievicz ... claimed that the [1916] abolition of Dublin Mean Time # was among various actions undertaken by the 'English' government that # would 'put the whole country into the SF (Sinn Féin) camp'. She claimed # Irish 'public feeling (was) outraged by forcing of English time on us'." --- 300,334 ---- # S.R.&O. 1916, No. 382 and HO 45/10811/312364 (quoted above) say otherwise. # # The following claim by Shanks & Pottenger is possible though doubtful; # we'll ignore it for now. # * Dublin's 1971-10-31 switch was at 02:00, even though London's was 03:00. + + # From Paul Eggert (2017-12-04): # ! # Dunsink Observatory (8 km NW of Dublin's center) was to Dublin as ! # Greenwich was to London. For example: # # "Timeball on the ballast office is down. Dunsink time." # -- James Joyce, Ulysses + # + # The abbreviation DMT stood for "Dublin Mean Time" or "Dunsink Mean Time"; + # this being Ireland, opinions differed. + # + # Whitman says Dublin/Dunsink Mean Time was UT-00:25:21, which agrees + # with measurements of recent visitors to the Meridian Room of Dunsink + # Observatory; see Malone D. Dunsink and timekeeping. 2016-01-24. + # <https://www.maths.tcd.ie/~dwmalone/time/dunsink.html>. Malone + # writes that the Nautical Almanac listed UT-00:25:22 until 1896, when + # it moved to UT-00:25:21.1 (I confirmed that the 1893 edition used + # the former and the 1896 edition used the latter). Evidently the + # news of this change propagated slowly, as Milne 1899 still lists + # UT-00:25:22 and cites the International Telegraph Bureau. As it is + # not clear that there was any practical significance to the change + # from UT-00:25:22 to UT-00:25:21.1 in civil timekeeping, omit this + # transition for now and just use the latter value, omitting its + # fraction since our format cannot represent fractions. # "Countess Markievicz ... claimed that the [1916] abolition of Dublin Mean Time # was among various actions undertaken by the 'English' government that # would 'put the whole country into the SF (Sinn Féin) camp'. She claimed # Irish 'public feeling (was) outraged by forcing of English time on us'."
*** 368,383 **** # which gives force to European Union 7th Council Directive No. 94/21/EC. # Under this directive, the Minister for Justice in Ireland makes appropriate # regulations. I spoke this morning with the Secretary of the Department of # Justice (tel +353 1 678 9711) who confirmed to me that the correct name is # "Irish Summer Time", abbreviated to "IST". # Michael Deckers (2017-06-01) gave the following URLs for Ireland's # Summer Time Act, 1925 and Summer Time Orders, 1926 and 1947: ! # http://www.irishstatutebook.ie/eli/1925/act/8/enacted/en/print.html ! # http://www.irishstatutebook.ie/eli/1926/sro/919/made/en/print.html ! # http://www.irishstatutebook.ie/eli/1947/sro/71/made/en/print.html # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S # Summer Time Act, 1916 Rule GB-Eire 1916 only - May 21 2:00s 1:00 BST Rule GB-Eire 1916 only - Oct 1 2:00s 0 GMT --- 384,415 ---- # which gives force to European Union 7th Council Directive No. 94/21/EC. # Under this directive, the Minister for Justice in Ireland makes appropriate # regulations. I spoke this morning with the Secretary of the Department of # Justice (tel +353 1 678 9711) who confirmed to me that the correct name is # "Irish Summer Time", abbreviated to "IST". + # + # From Paul Eggert (2017-12-07): + # The 1996 anonymous contributor's goal was to determine the correct + # abbreviation for summer time in Dublin and so the contributor + # focused on the "IST", not on the "Irish Summer Time". Though the + # "IST" was correct, the "Irish Summer Time" appears to have been an + # error, as Ireland's Standard Time (Amendment) Act, 1971 states that + # standard time in Ireland remains at UT +01 and is observed in + # summer, and that Greenwich mean time is observed in winter. (Thanks + # to Derick Rethans for pointing out the error.) That is, when + # Ireland amended the 1968 act that established UT +01 as Irish + # Standard Time, it left standard time unchanged and established GMT + # as a negative daylight saving time in winter. So, in this database + # IST stands for Irish Summer Time for timestamps before 1968, and for + # Irish Standard Time after that. See: + # http://www.irishstatutebook.ie/eli/1971/act/17/enacted/en/print # Michael Deckers (2017-06-01) gave the following URLs for Ireland's # Summer Time Act, 1925 and Summer Time Orders, 1926 and 1947: ! # http://www.irishstatutebook.ie/eli/1925/act/8/enacted/en/print ! # http://www.irishstatutebook.ie/eli/1926/sro/919/made/en/print ! # http://www.irishstatutebook.ie/eli/1947/sro/71/made/en/print # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S # Summer Time Act, 1916 Rule GB-Eire 1916 only - May 21 2:00s 1:00 BST Rule GB-Eire 1916 only - Oct 1 2:00s 0 GMT
*** 497,527 **** 0:00 EU GMT/BST Link Europe/London Europe/Jersey Link Europe/London Europe/Guernsey Link Europe/London Europe/Isle_of_Man # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Europe/Dublin -0:25:00 - LMT 1880 Aug 2 ! -0:25:21 - DMT 1916 May 21 2:00s # Dublin MT -0:25:21 1:00 IST 1916 Oct 1 2:00s 0:00 GB-Eire %s 1921 Dec 6 # independence 0:00 GB-Eire GMT/IST 1940 Feb 25 2:00s 0:00 1:00 IST 1946 Oct 6 2:00s 0:00 - GMT 1947 Mar 16 2:00s 0:00 1:00 IST 1947 Nov 2 2:00s 0:00 - GMT 1948 Apr 18 2:00s 0:00 GB-Eire GMT/IST 1968 Oct 27 1:00 - IST 1971 Oct 31 2:00u 0:00 GB-Eire GMT/IST 1996 0:00 EU GMT/IST ############################################################################### # Europe ! # EU rules are for the European Union, previously known as the EC, EEC, ! # Common Market, etc. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule EU 1977 1980 - Apr Sun>=1 1:00u 1:00 S Rule EU 1977 only - Sep lastSun 1:00u 0 - Rule EU 1978 only - Oct 1 1:00u 0 - --- 529,590 ---- 0:00 EU GMT/BST Link Europe/London Europe/Jersey Link Europe/London Europe/Guernsey Link Europe/London Europe/Isle_of_Man + # From Paul Eggert (2018-01-19): + # The following is like GB-Eire and EU, except with standard time in + # summer and negative daylight saving time in winter. + # Although currently commented out, this will need to become uncommented + # once the ICU/OpenJDK workaround is removed; see below. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S + #Rule Eire 1971 only - Oct 31 2:00u -1:00 GMT + #Rule Eire 1972 1980 - Mar Sun>=16 2:00u 0 IST + #Rule Eire 1972 1980 - Oct Sun>=23 2:00u -1:00 GMT + #Rule Eire 1981 max - Mar lastSun 1:00u 0 IST + #Rule Eire 1981 1989 - Oct Sun>=23 1:00u -1:00 GMT + #Rule Eire 1990 1995 - Oct Sun>=22 1:00u -1:00 GMT + #Rule Eire 1996 max - Oct lastSun 1:00u -1:00 GMT + # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Europe/Dublin -0:25:00 - LMT 1880 Aug 2 ! -0:25:21 - DMT 1916 May 21 2:00s -0:25:21 1:00 IST 1916 Oct 1 2:00s 0:00 GB-Eire %s 1921 Dec 6 # independence 0:00 GB-Eire GMT/IST 1940 Feb 25 2:00s 0:00 1:00 IST 1946 Oct 6 2:00s 0:00 - GMT 1947 Mar 16 2:00s 0:00 1:00 IST 1947 Nov 2 2:00s 0:00 - GMT 1948 Apr 18 2:00s 0:00 GB-Eire GMT/IST 1968 Oct 27 + # From Paul Eggert (2018-01-18): + # The next line should look like this: + # 1:00 Eire IST/GMT + # However, in January 2018 we discovered that the Eire rules cause + # problems with tests for ICU: + # https://mm.icann.org/pipermail/tz/2018-January/025825.html + # and with tests for OpenJDK: + # https://mm.icann.org/pipermail/tz/2018-January/025822.html + # To work around this problem, use a traditional approximation for + # time stamps after 1971-10-31 02:00 UTC, to give ICU and OpenJDK + # developers breathing room to fix bugs. This approximation has + # correct UTC offsets, but results in tm_isdst flags are the reverse + # of what they should be. This workaround is temporary and should be + # removed reasonably soon. 1:00 - IST 1971 Oct 31 2:00u 0:00 GB-Eire GMT/IST 1996 0:00 EU GMT/IST + # End of workaround for ICU and OpenJDK bugs. + ############################################################################### # Europe ! # The following rules are for the European Union and for its ! # predecessor organization, the European Communities. ! # For brevity they are called "EU rules" elsewhere in this file. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule EU 1977 1980 - Apr Sun>=1 1:00u 1:00 S Rule EU 1977 only - Sep lastSun 1:00u 0 - Rule EU 1978 only - Oct 1 1:00u 0 -
*** 950,960 **** # http://www.hum.aau.dk/~poe/tid/tine/DanskTid.htm says that the law # [introducing standard time] was in effect from 1894-01-01.... # The page http://www.retsinfo.dk/_GETDOCI_/ACCN/A18930008330-REGL # confirms this, and states that the law was put forth 1893-03-29. # ! # The EU treaty with effect from 1973: # http://www.retsinfo.dk/_GETDOCI_/ACCN/A19722110030-REGL # # This provoked a new law from 1974 to make possible summer time changes # in subsequent decrees with the law # http://www.retsinfo.dk/_GETDOCI_/ACCN/A19740022330-REGL --- 1013,1023 ---- # http://www.hum.aau.dk/~poe/tid/tine/DanskTid.htm says that the law # [introducing standard time] was in effect from 1894-01-01.... # The page http://www.retsinfo.dk/_GETDOCI_/ACCN/A18930008330-REGL # confirms this, and states that the law was put forth 1893-03-29. # ! # The EU [actually, EEC and Euratom] treaty with effect from 1973: # http://www.retsinfo.dk/_GETDOCI_/ACCN/A19722110030-REGL # # This provoked a new law from 1974 to make possible summer time changes # in subsequent decrees with the law # http://www.retsinfo.dk/_GETDOCI_/ACCN/A19740022330-REGL
*** 1006,1018 **** # From Paul Eggert (2004-10-31): # During World War II, Germany maintained secret manned weather stations in # East Greenland and Franz Josef Land, but we don't know their time zones. # My source for this is Wilhelm Dege's book mentioned under Svalbard. # ! # From Paul Eggert (2006-03-22): ! # Greenland joined the EU as part of Denmark, obtained home rule on 1979-05-01, ! # and left the EU on 1985-02-01. It therefore should have been using EU # rules at least through 1984. Shanks & Pottenger say Scoresbysund and Godthåb # used C-Eur rules after 1980, but IATA SSIM (1991/1996) says they use EU # rules since at least 1991. Assume EU rules since 1980. # From Gwillim Law (2001-06-06), citing --- 1069,1082 ---- # From Paul Eggert (2004-10-31): # During World War II, Germany maintained secret manned weather stations in # East Greenland and Franz Josef Land, but we don't know their time zones. # My source for this is Wilhelm Dege's book mentioned under Svalbard. # ! # From Paul Eggert (2017-12-10): ! # Greenland joined the European Communities as part of Denmark, ! # obtained home rule on 1979-05-01, and left the European Communities ! # on 1985-02-01. It therefore should have been using EU # rules at least through 1984. Shanks & Pottenger say Scoresbysund and Godthåb # used C-Eur rules after 1980, but IATA SSIM (1991/1996) says they use EU # rules since at least 1991. Assume EU rules since 1980. # From Gwillim Law (2001-06-06), citing
*** 1322,1332 **** # Germany # From Markus Kuhn (1998-09-29): # The German time zone web site by the Physikalisch-Technische # Bundesanstalt contains DST information back to 1916. ! # [See tz-link.htm for the URL.] # From Jörg Schilling (2002-10-23): # In 1945, Berlin was switched to Moscow Summer time (GMT+4) by # https://www.dhm.de/lemo/html/biografien/BersarinNikolai/ # General [Nikolai] Bersarin. --- 1386,1396 ---- # Germany # From Markus Kuhn (1998-09-29): # The German time zone web site by the Physikalisch-Technische # Bundesanstalt contains DST information back to 1916. ! # [See tz-link.html for the URL.] # From Jörg Schilling (2002-10-23): # In 1945, Berlin was switched to Moscow Summer time (GMT+4) by # https://www.dhm.de/lemo/html/biografien/BersarinNikolai/ # General [Nikolai] Bersarin.
*** 1419,1429 **** 1:34:52 - AMT 1916 Jul 28 0:01 # Athens MT 2:00 Greece EE%sT 1941 Apr 30 1:00 Greece CE%sT 1944 Apr 4 2:00 Greece EE%sT 1981 # Shanks & Pottenger say it switched to C-Eur in 1981; ! # go with EU instead, since Greece joined it on Jan 1. 2:00 EU EE%sT # Hungary # From Paul Eggert (2014-07-15): # Dates for 1916-1945 are taken from: --- 1483,1493 ---- 1:34:52 - AMT 1916 Jul 28 0:01 # Athens MT 2:00 Greece EE%sT 1941 Apr 30 1:00 Greece CE%sT 1944 Apr 4 2:00 Greece EE%sT 1981 # Shanks & Pottenger say it switched to C-Eur in 1981; ! # go with EU rules instead, since Greece joined Jan 1. 2:00 EU EE%sT # Hungary # From Paul Eggert (2014-07-15): # Dates for 1916-1945 are taken from:
*** 2118,2128 **** # IATA SSIM (1991-09) reports several 1991-09 and 1992-09 transitions # at 02:00u, not 01:00u. Assume that these are typos. # IATA SSIM (1991/1992) reports that the Azores were at -1:00. # IATA SSIM (1993-02) says +0:00; later issues (through 1996-09) say -1:00. # Guess that the Azores changed to EU rules in 1992 (since that's when Portugal ! # harmonized with the EU), and that they stayed +0:00 that winter. # # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S # DSH writes that despite Decree 1,469 (1915), the change to the clocks was not # done every year, depending on what Spain did, because of railroad schedules. # Go with Shanks & Pottenger. --- 2182,2192 ---- # IATA SSIM (1991-09) reports several 1991-09 and 1992-09 transitions # at 02:00u, not 01:00u. Assume that these are typos. # IATA SSIM (1991/1992) reports that the Azores were at -1:00. # IATA SSIM (1993-02) says +0:00; later issues (through 1996-09) say -1:00. # Guess that the Azores changed to EU rules in 1992 (since that's when Portugal ! # harmonized with EU rules), and that they stayed +0:00 that winter. # # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S # DSH writes that despite Decree 1,469 (1915), the change to the clocks was not # done every year, depending on what Spain did, because of railroad schedules. # Go with Shanks & Pottenger.
*** 2793,2805 **** # suggests that Altai Republic transitioned to Moscow+3 on # 1995-05-28. # # https://regnum.ru/news/society/1957270.html # has some historical data for Altai Krai: ! # before 1957: west part on UTC+6, east on UTC+7 ! # after 1957: UTC+7 ! # since 1995: UTC+6 # http://barnaul.rusplt.ru/index/pochemu_altajskij_kraj_okazalsja_v_neprivychnom_chasovom_pojase-17648.html # confirms that and provides more details including 1995-05-28 transition date. # From Alexander Krivenyshev (2016-02-17): # Altai Krai and Altai Republic on their way to change time zones --- 2857,2869 ---- # suggests that Altai Republic transitioned to Moscow+3 on # 1995-05-28. # # https://regnum.ru/news/society/1957270.html # has some historical data for Altai Krai: ! # before 1957: west part on UT+6, east on UT+7 ! # after 1957: UT+7 ! # since 1995: UT+6 # http://barnaul.rusplt.ru/index/pochemu_altajskij_kraj_okazalsja_v_neprivychnom_chasovom_pojase-17648.html # confirms that and provides more details including 1995-05-28 transition date. # From Alexander Krivenyshev (2016-02-17): # Altai Krai and Altai Republic on their way to change time zones
*** 3603,3612 **** --- 3667,3687 ---- # # From Paul Eggert (2016-09-07): # The change is permanent, so this is the new standard time in Turkey. # It takes effect today, which is not much notice. + # From Kıvanç Yazan (2017-10-28): + # Turkey will go back to Daylight Saving Time starting 2018-10. + # http://www.resmigazete.gov.tr/eskiler/2017/10/20171028-5.pdf + # + # From Even Scharning (2017-11-08): + # ... today it was announced that the DST will become "continuous": + # http://www.hurriyet.com.tr/son-dakika-yaz-saati-uygulamasi-surekli-hale-geldi-40637482 + # From Paul Eggert (2017-11-08): + # Although Google Translate misfires on that source, it looks like + # Turkey reversed last month's decision, and so will stay at +03. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Turkey 1916 only - May 1 0:00 1:00 S Rule Turkey 1916 only - Oct 1 0:00 0 - Rule Turkey 1920 only - Mar 28 0:00 1:00 S Rule Turkey 1920 only - Oct 25 0:00 0 -
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