[tz] China time zones 1949 - 1980: appeal to speakers of Mandarin

[J Andrew Lipscomb]

Ah, that part was unclear from what I had seen. I was under the impression that we knew there were distinct zones in (say) 1940, and that would fall into the category of "don't do new zones, but don't throw out either" that Montréal fell into. But if even that time period is guesswork, then not a substantial problem.

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> Le 3 juil. 2014 à 14:33, Paul Eggert <eggert at cs.ucla.edu> a écrit :
> 
>> On 07/03/2014 08:21 AM, J Andrew Lipscomb wrote:
>> Questioning whether the other three Chinese zones should be removed or instead updated to the 1949 transition date.
> From the evidence we have so far, there's reasonable doubt whether the other three Chinese zones actually existed, other than on paper.  Most of the data in them appear to have been wrong, at any rate.  When there's this much error and uncertainty in entries not needed for the tz database's scope, it's better to omit them.
> 
> If this turns into a problem, I'd rather turn America/Montreal back into a link than spend maintenance effort on these out-of-scope zones.  We lack the resources to investigate what all the revolutionaries and warlords and foreign occupiers did in China long ago, much less resolve the inevitable historical disputes this would entail.