[tz] Turkey Rules late 70's - October 1978 bug?

[Alois Treindl]

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?


On 21.10.10 16:35, Olson, Arthur David (NIH/NCI) [E] wrote:
> 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 at astrology-x-files.com]
> Sent: Saturday, October 16, 2010 12:59 PM
> To: tz at 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
>
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