[tz] [english 100%] Re: About Asia/Hanoi

Meno Hochschild mhochschild at gmx.de
Sun Sep 10 07:13:28 UTC 2017

Thank you very much for your answer. I understand the concern to 
minimize the count of identifiers where possible. However, now the 
question arises if the rules of outdated Asia/Hanoi will be updated, 
too, if for example the rules of Asia/Ho_Chi_Minh might change in the 
future. Will the rules of backzone-identifiers be adjusted to future 
changes or not?

I would take an answer to this question into consideration to decide if 
I include the backzone-file into my future tz-distributions or not.

> Meno Hochschild wrote:
>> Should there be a link between Asia/Hanoi and Asia/Ho_Chi_Minh in TZDB?
>> ...
>> (see: https://github.com/ThreeTen/threetenbp/issues/57)
> Since the same problem was reported for Asia/Yekaterinburg, I don't 
> see why it matters whether Asia/Hanoi is in backzone or in some other 
> file. Anyway, we're not likely to create unnecessary names merely 
> because of improperly configured or buggy software; otherwise we'd 
> need entries for every misspelling of every city on the planet. 
> Asia/Hanoi is in backzone because it is beyond the scope of the tz 
> database: Hanoi's time history since 1970 is identical to that of 
> Asia/Bangkok, the entry that zone1970.tab uses for North Vietnam.

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