I am coming back on this subject of time change in Turkey on 15 October 1978.

TZ has

Rule    Turkey  1977    1978    -       Apr     Sun>=1  0:00    1:00    S
Rule    Turkey  1977    only    -       Oct     16      0:00    0       -
Rule    Turkey  1979    1980    -       Apr     Sun>=1  3:00    1:00    S
Rule    Turkey  1979    1982    -       Oct     Mon>=11 0:00    0       -
AND
Zone    Europe/Istanbul 1:55:52 -       LMT     1880
                        1:56:56 -       IMT     1910 Oct # Istanbul Mean Time?
                        2:00    Turkey  EE%sT   1978 Oct 15
                        3:00    Turkey  +03/+04 1985 Apr 20

zdump -V -c 1977,1980 Europe/Istanbul
Europe/Istanbul  Sat Apr  2 21:59:59 1977 UT = Sat Apr  2 23:59:59 1977 EET isdst=0 gmtoff=7200
Europe/Istanbul  Sat Apr  2 22:00:00 1977 UT = Sun Apr  3 01:00:00 1977 EEST isdst=1 gmtoff=10800
Europe/Istanbul  Sat Oct 15 20:59:59 1977 UT = Sat Oct 15 23:59:59 1977 EEST isdst=1 gmtoff=10800
Europe/Istanbul  Sat Oct 15 21:00:00 1977 UT = Sat Oct 15 23:00:00 1977 EET isdst=0 gmtoff=7200
Europe/Istanbul  Sat Apr  1 21:59:59 1978 UT = Sat Apr  1 23:59:59 1978 EET isdst=0 gmtoff=7200
Europe/Istanbul  Sat Apr  1 22:00:00 1978 UT = Sun Apr  2 01:00:00 1978 EEST isdst=1 gmtoff=10800
Europe/Istanbul  Sat Oct 14 20:59:59 1978 UT = Sat Oct 14 23:59:59 1978 EEST isdst=1 gmtoff=10800
Europe/Istanbul  Sat Oct 14 21:00:00 1978 UT = Sun Oct 15 01:00:00 1978 +04 isdst=1 gmtoff=14400
Europe/Istanbul  Sun Oct 14 19:59:59 1979 UT = Sun Oct 14 23:59:59 1979 +04 isdst=1 gmtoff=14400
Europe/Istanbul  Sun Oct 14 20:00:00 1979 UT = Sun Oct 14 23:00:00 1979 +03 isdst=0 gmtoff=10800

According to this, Turkey did not only not turn the hour back from +3h to +2h as otherwise in October at the end of DST,
but in 1978 moved from +3h to +4h on 14 Oct 1978.

It did move standard time forward AND did not end DST.

Is there any source for this fact? The comment does not show any.

Or is it a bug? Arthur Olson writes that the clocks were not back. But were they actually turned forward?

The "europe" file rules represent Turkey changing time zones in 1978 by moving its clocks forward twice in the same year;
Turkish clocks weren't turned back in 1978.

				--ado

-----Original Message-----
From: Zoidiasoft Tech [mailto:tech@astrology-x-files.com] 
Sent: Saturday, October 16, 2010 12:59 PM
To: tz@lecserver.nci.nih.gov
Subject: Turkey Rules late 70's

  Rule Turkey 1977 1978 - Apr Sun>=1 0:00 1:00 S
  Rule Turkey 1977 only - Oct 16 0:00 0 -
  Rule Turkey 1979 1980 - Apr Sun>=1 3:00 1:00 S

-------

Did Turkey go off Summer Time in 1978?

C. Manwaring