[tz] Add new timezone for Hanoi Capital, Vietnam

KP khaiphan9x at gmail.com
Mon Feb 18 18:07:25 UTC 2019

I have a talent for continuous change of Indochina time, but it is a
Vietnamese document, I have not found the same document in English. Show
that the time of Vietnam taking Asia/Bangkok is wrong, because Thai does
not apply under this document

Vào 0:59, Th 3, 19 thg 2, 2019 Guy Harris <guy at alum.mit.edu đã viết:

> On Feb 18, 2019, at 9:07 AM, KP <khaiphan9x at gmail.com> wrote:
> > It is possible to link Hanoi to Asia/Ho_Chi_Minh instead of Asia/Bangkok
> ...but doing so means that pre-time-zone-unification but post-1970-01-01
> 00:00:00 UTC dates will not be converted correctly, so it would be
> incorrect to do so.
> > there is no document saying that North Vietnam accepted Asia/Bangkok as
> a representative time zone.
> What matters isn't whether they officially accepted it; what matters is
> whether they, in practice, kept the same time.
> > However, I did not change the idea that Hanoi is the best representative
> for Vietnam,
> Given that there are, apparently, post-1970-01-01 00:00:00 UTC dates/times
> where local time differed between locations in what was then North Vietnam
> and what was then South Vietnam, there isn't a single tzdb region that
> represents Vietnam, there are two.
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