[tz] Request for Change of Time Zone Name from Asia/Ho_Chi_Minh to Asia/Ha_Noi

[Guy Harris]

On Jul 3, 2024, at 10:54 AM, Ian Abbott via tz <tz at iana.org> wrote:

> On 03/07/2024 08:11, viet le via tz wrote:
> 
>> Hà Nội, as the capital city of Viet Nam, is the administrative and
>> political center of the country. It holds significant historical,
>> cultural, and socio-economic importance. Consequently, using Hà Nội as
>> the reference point for the country's time zone would be more
>> appropriate and align with international standards and practices.
> 
> The timezone identifier string for a region is based on the most populous city in the region, not on political centers.  For example, the TZ database contains "Asia/Shanghai" (rather than the capital city "Asia/Beijing") for this reason.  This policy is described in the TZ "Theory" document: https://ftp.iana.org/tz/theory.html

Some further examples of "the capital city is not the city whose name is used for the tzdb timezone the city is in":

US:
	capital: Washington
	timezone city for the timezone the capital is in: New York

Canada:
	capital: Ottawa
	timezone city for the timezone the capital is in: Toronto

Brazil:
	capital: Brasilia
	timezone city for the timezone the capital is in: Sao Paulo

China:
	capital: Beijing
	timezone city for the timezone the capital is in: Shanghai

Australia:
	capital: Canberra
	timezone city for the timezone the capital is in: Sydney

And, once again, I note that tzids Should. Not. Be. Exposed. To. The. Majority. Of. Users.  If a user interface offers cities to choose from, It. Should. Not. Offer. Only. The. Cities. That. Are. Used. In. Tzids., it should offer a wider range of cities and map from the city to the tzid.