[tz] citations for Turkish time 1973/1985

[Paul Eggert]

Thanks for all that work in tracking down legal citations for Turkish time from 
1973 through 1985. I installed the attached patch to tzdb, to incorporate those 
citations. This doesn't affect the data, since the citations agree with the Oya 
Vulaş table that we just got data from, but it's better to cite the original 
sources than to go indirectly via Oya Vulaş.
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From 85792e12a0d2b083421eea90bfdf1738df2620e4 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert at cs.ucla.edu>
Date: Wed, 28 Aug 2019 00:43:26 -0700
Subject: [PROPOSED] =?UTF-8?q?*=20NEWS,=20europe:=20Add=20citations=20from?=
 =?UTF-8?q?=20K=C4=B1van=C3=A7=20Yazan.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 NEWS   |  2 +-
 europe | 51 +++++++++++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 50 insertions(+), 3 deletions(-)

diff --git a/NEWS b/NEWS
index ab73f8a..40fcf39 100644
--- a/NEWS
+++ b/NEWS
@@ -19,7 +19,7 @@ Unreleased, experimental changes
   Changes to past timestamps
 
     Many corrections to time in Turkey from 1940 through 1985.
-    (Thanks to Oya Vulaş via Alois Treindl.)
+    (Thanks to Oya Vulaş via Alois Treindl, and to Kıvanç Yazan.)
 
     South Korea observed DST from 1948 through 1951.  Although this
     info was supposed to appear in release 2014j, a typo inadvertently
diff --git a/europe b/europe
index 355260d..2b697dc 100644
--- a/europe
+++ b/europe
@@ -3666,11 +3666,58 @@ Zone	Europe/Zurich	0:34:08 -	LMT	1853 Jul 16 # See above comment.
 # From Alois Treindl (2019-08-12):
 # http://www.astrolojidergisi.com/yazsaati.htm has researched the time zone
 # history of Turkey, based on newspaper archives and official documents.
-# From Paul Eggert (2019-08-27):
+# From Paul Eggert (2019-08-28):
 # That source (Oya Vulaş, "Türkiye'de Yaz Saati Uygulamaları")
-# is used for 1940/1985, where it seems more reliable than our other
+# is used for 1940/1972, where it seems more reliable than our other
 # sources.
 
+# From Kıvanç Yazan (2019-08-12):
+# http://www.resmigazete.gov.tr/arsiv/14539.pdf (page 24)
+# 1973-06-03 01:00 -> 02:00, 1973-11-04 02:00 -> 01:00
+#
+# http://www.resmigazete.gov.tr/arsiv/14829.pdf (page 1)
+# 1974-03-31 02:00 -> 03:00, 1974-11-03 02:00 -> 01:00
+#
+# http://www.resmigazete.gov.tr/arsiv/15161.pdf (page 1)
+# 1975-03-22 02:00 -> 03:00, 1975-11-02 02:00 -> 01:00
+#
+# http://www.resmigazete.gov.tr/arsiv/15535_1.pdf (page 1)
+# 1976-03-21 02:00 -> 03:00, 1976-10-31 02:00 -> 01:00
+#
+# http://www.resmigazete.gov.tr/arsiv/15778.pdf (page 5)
+# 1977-04-03 02:00 -> 03:00, 1977-10-16 02:00 -> 01:00,
+# 1978-04-02 02:00 -> 03:00 (not applied, see below)
+# 1978-10-15 02:00 -> 01:00 (not applied, see below)
+# 1979-04-01 02:00 -> 03:00 (not applied, see below)
+# 1979-10-14 02:00 -> 01:00 (not applied, see below)
+#
+# http://www.resmigazete.gov.tr/arsiv/16245.pdf (page 17)
+# This cancels the previous decision, and repeats it only for 1978.
+# 1978-04-02 02:00 -> 03:00, 1978-10-15 02:00 -> 01:00
+# (not applied due to standard TZ change below)
+#
+# http://www.resmigazete.gov.tr/arsiv/16331.pdf (page 3)
+# This decision changes the default longitude for Turkish time zone from 30
+# degrees East to 45 degrees East.  This means a standard TZ change, from +2
+# to +3.  This is published & applied on 1978-06-29.  At that time, Turkey was
+# already on summer time (already on 45E).  Hence, this new law just meant an
+# "continuous summer time".  Note that this was reversed in a few years.
+#
+# http://www.resmigazete.gov.tr/arsiv/18119_1.pdf (page 1)
+# 1983-07-31 02:00 -> 03:00 (note that this jumps TZ to +4)
+# 1983-10-02 02:00 -> 01:00 (back to +3)
+#
+# http://www.resmigazete.gov.tr/arsiv/18561.pdf (page 1 and 34)
+# At this time, Turkey is still on +3 with no spring-forward on early
+# 1984.  This decision is published on 10/31/1984.  Page 1 declares
+# the decision of reverting the "default longitude change".  So the
+# standard time should go back to +3 (30E).  And page 34 explains when
+# that will happen: 1984-11-01 02:00 -> 01:00.  You can think of this
+# as "end of continuous summer time, change of standard time zone".
+#
+# http://www.resmigazete.gov.tr/arsiv/18713.pdf (page 1)
+# 1985-04-20 01:00 -> 02:00, 1985-09-28 02:00 -> 01:00
+
 # From Kıvanç Yazan (2016-09-25):
 # 1) For 1986-2006, DST started at 01:00 local and ended at 02:00 local, with
 #    no exceptions.
-- 
2.17.1