[tz] proposed change to Europe/Kaliningrad in 1945

[Alois Treindl]

I propose of course
Zone Europe/Kaliningrad   1:22:00 -      LMT     1893 Apr
                          1:00   C-Eur   CE%sT   1945 Apr 10
1:00   1:00 CEST    1945 May 24 2:00
                          1:00   2:00    CEMT    1945 Sep 24 3:00
                          1:00   1:00    CEST    1945 Oct 17
                          2:00   -       EET     1946 Apr 7
                          3:00   Russia  MSK/MSD 1989 Mar 26 2:00s
                          2:00   Russia  EE%sT   2011 Mar 27 2:00s
                          3:00   -       +03     2014 Oct 26 2:00s
                          2:00   -       EET

The zone
Europe/Russia/Kaliningrad
is part of my private extension which I use as long as the proposed 
change is not accepted in TZ.

I have plenty of other /Russia/ zones in my private extension while I am 
working on digesting a lot of pre-1970 info from various sources.


On 21.02.22 23:37, Alois Treindl via tz wrote:
>
> Currently the zone Europe/Kaliningrad has
>
> Zone Europe/Kaliningrad  1:22:00 - LMT     1893 Apr
>                          1:00   C-Eur   CE%sT   1945 Apr 10
> 2:00   Poland EE%sT   1946 Apr  7
>                          3:00   Russia  MSK/MSD 1989 Mar 26 2:00s
>                          2:00   Russia  EE%sT   2011 Mar 27 2:00s
>                          3:00   -       +03     2014 Oct 26 2:00s
>                          2:00   -       EET
>
> I wonder on which source this line is based:
>                          2:00   Poland  EE%sT   1946 Apr  7
>
> It implies these time changes:
> 29 April 1945 from 2:00 to 3:00 like Poland DST
> 1 November 1945 from 3:00 back to 2:00
>
> Russia took control of Königsberg/Kaliningrad in East Prussia on 10 
> April 1045.
>
> As a general rule, Russia imposed timezone 2:00 on occupied German 
> territory in 1945,
> which is the same as German DST already in force from 2 April 1945.
>
> On 24 May 1945 Russia imposed double DST, making the effective time 
> 3:00 east, until 24 Sept 1945, when it went back to 2:00
> and then back to 1:00 (CET) on 18 Nov 1945.
>
> Now what happened in Königsberg?
>
> The Potsdam agreement of 2 August 1945 : (quote from Wikipedia)
>
>> The Conference has agreed in principle to the proposal of the Soviet 
>> Government concerning the ultimate transfer to the Soviet Union of 
>> the City of Koenigsberg and the area adjacent to it as described 
>> above subject to expert examination of the actual frontier.
>
> Russia annexed the area on 17 October 1945, and integrated into the 
> republic of Russia on 7 April 1946.
>
> Poland had no role to play in this matter.
>
> Regarding time regime, I would assume that the transition from 2:00 to 
> 1:00 of 18 Nov 1945, for occupied Germany, did not happen in Kaliningrad.
> It was already annexed.
> It remained at 2:00 until 7 April 1946, when it was integrated and 
> went to Moscow time.
>
> This transition on 7 April 1946 is also found in Shanks.
> Shanks does not have the double DST from 24 May to 24 September 1945, 
> but I think he is wrong there.
> Why should the Russians have treated East Prussia from the rest of the 
> occupied German territory in May 1945.
>
> That would make the zone table like this ( I marked the difference in red)
> Zone Europe/Russia/Kaliningrad   1:22:00 -      LMT     1893 Apr
>                          1:00   C-Eur   CE%sT   1945 Apr 10
> 1:00   1:00 CEST    1945 May 24 2:00
>                          1:00   2:00    CEMT    1945 Sep 24 3:00
>                          1:00   1:00    CEST    1945 Oct 17
>                          2:00   -       EET     1946 Apr 7
>                          3:00   Russia  MSK/MSD 1989 Mar 26 2:00s
>                          2:00   Russia  EE%sT   2011 Mar 27 2:00s
>                          3:00   -       +03     2014 Oct 26 2:00s
>                          2:00   -       EET
>
> I have tried to simplify
>
> Zone Europe/Russia/Kaliningrad   1:22:00 -      LMT     1893 Apr
>                          1:00   C-Eur   CE%sT   1945 Apr 10
>                          1:00  SovietZone CE%sT 1945 Oct 17
>                          2:00   -       EET     1946 Apr 7
>                          3:00   Russia  MSK/MSD 1989 Mar 26 2:00s
>                          2:00   Russia  EE%sT   2011 Mar 27 2:00s
>                          3:00   -       +03     2014 Oct 26 2:00s
>                          2:00   -       EET
>
> but get an error: can't determine time zone abbreviation to use just 
> after until time
> at this line in tzdata.zi
>
> 1 So CE%sT 1945 O 17
>
> This is why I made the changes implied by rule SovietZone explicit
>
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