On Tue, Feb 15, 2022 at 07:44:35PM +0100, Alois Treindl via tz wrote:
correction: Rostov-on-Don is the larger city, with 1.1 million inhabitants
Well, the 3 largest cities in the affected area would be Nizhny Novgorod (Gorky at the time), Kazan and Rostov-on-Don. And which one of them is larger changed with time. Another caveat: I do not know whether they were on the same time in 1970. They all were on Moscow+1 time and switched to Moscow time in different years. https://vladimir-l-s.livejournal.com/36842.html contains 1969 map placing Gorky in Moscow+1 zone and discusses whether this is an error on the map. (Note «Территории, на которых фактическое исчисление времени отличается от декретного на минус 1 час (официально не утверждено)» wording in the legend of the map.)
On 15.02.22 19:39, Alois Treindl via tz wrote:
To me it seems that an extra zone is needed, which starts with LMT util 1919, later follows Moscow since 1930, but deviates from it between 1 October 1981 until 1 April 1982.
I suggest to call this zone Europe/Yaroslavl, because Yaroslavl with a population of 608'000 seems to be largest city in the deviating area.