>From fa1591214c70553ac8db5009ea8605b89bdfb546 Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Tue, 7 May 2019 00:12:38 -0700 Subject: [PROPOSED] =?UTF-8?q?Italy=E2=80=99s=201866=20transition=20was=20?= =?UTF-8?q?12-12,=20not=2009-22?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit * NEWS: Mention this. * europe (Europe/Rome): Switch from LMT to RMT on 1866-12-12, not on 1866-09-22. --- NEWS | 7 +++++++ europe | 22 +++++++++++++++++++++- 2 files changed, 28 insertions(+), 1 deletion(-) diff --git a/NEWS b/NEWS index 0f5f2e7..0de4442 100644 --- a/NEWS +++ b/NEWS @@ -18,6 +18,13 @@ Unreleased, experimental changes at 01:00. (Thanks to Sharef Mustafa and Even Scharning.) Guess future transitions to be March's last Friday at 00:00. + Changes to past time zone abbreviations + + Italy's 1866 transition to Rome Mean Time was on December 12, not + September 22. This affects only the time zone abbreviation for + Europe/Rome during that period. (Thanks to Stephen Trainor and + Luigi Rosa.) + Release 2019a - 2019-03-25 22:01:33 -0700 diff --git a/europe b/europe index 5ccb867..80c31fc 100644 --- a/europe +++ b/europe @@ -1583,6 +1583,25 @@ Zone Atlantic/Reykjavik -1:28 - LMT 1908 # But these events all occurred before the 1970 cutoff, # so record only the time in Rome. # +# From Stephen Trainor (2019-05-06): +# http://www.ac-ilsestante.it/MERIDIANE/ora_legale/ORA_LEGALE_ESTIVA_IN_ITALIA.htm +# ... the [1866] law went into effect on 12 December 1866, rather than +# the date of the decree (22 Sep 1866) +# https://web.archive.org/web/20070824155341/http://www.iav.it/planetario/didastro/didastro/english.htm +# ... "In Italy in 1866 there were 6 railway times (Torino, Verona, Firenze, +# Roma, Napoli, Palermo). On that year it was decided to unify them, adopting +# the average time of Rome (even if this city was not yet part of the +# kingdom). On the 12th December 1866, on the starting of the winter time +# table, it took effect in the railways, the post office and the telegraph, +# not only for the internal service but also for the public.... Milano set +# the public watches on the Rome time on the same day (12th December 1866), +# Torino and Bologna on the 1st January 1867, Venezia the 1st May 1880 and the +# last city was Cagliari in 1886." +# +# From Luigi Rosa (2019-05-07): +# this is the scan of the decree: +# http://www.radiomarconi.com/marconi/filopanti/1866c.jpg +# # From Michael Deckers (2016-10-24): # http://www.ac-ilsestante.it/MERIDIANE/ora_legale quotes a law of 1893-08-10 # ... [translated as] "The preceding dispositions will enter into @@ -1593,6 +1612,7 @@ Zone Atlantic/Reykjavik -1:28 - LMT 1908 # The authoritative source for time in Italy is the national metrological # institute, which has a summary page of historical DST data at # http://www.inrim.it/res/tf/ora_legale_i.shtml +# [http://oldsite.inrim.it/res/tf/ora_legale_i.shtml in 2017] # (2016-10-24): # http://www.renzobaldini.it/le-ore-legali-in-italia/ # has still different data for 1944. It divides Italy in two, as @@ -1657,7 +1677,7 @@ Rule Italy 1977 1979 - May Sun>=22 0:00s 1:00 S Rule Italy 1978 only - Oct 1 0:00s 0 - Rule Italy 1979 only - Sep 30 0:00s 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Europe/Rome 0:49:56 - LMT 1866 Sep 22 +Zone Europe/Rome 0:49:56 - LMT 1866 Dec 12 0:49:56 - RMT 1893 Oct 31 23:49:56 # Rome Mean 1:00 Italy CE%sT 1943 Sep 10 1:00 C-Eur CE%sT 1944 Jun 4 -- 2.17.1