[tz] Wrong timezone

[Tim Parenti]

On Tue, 14 Mar 2023 at 11:32, Minu Shie via tz <tz at iana.org> wrote:

> Hi, I've checked the sites that are currently using your database and all
> of them have the wrong timezone for Valle Hermoso, Tamaulipas, México.
> Which should be the same as Matamoros, Tamaulipas, México.
> (America/Matamoros) instead of (America/Monterrey).
>

https://data.iana.org/time-zones/data/theory.html says that the tz database
does not attempt to formally delineate boundaries between zone IDs;
nevertheless, it appears this is reflected properly in our commentary:
https://github.com/eggert/tz/blob/1dd5133c04707a454e275032f6264b03f267638b/northamerica#L2598-L2615

As such, issues with mappings of locations such as Valle Hermoso to zone
IDs such as America/Matamoros should be raised to those doing the mappings
— either the websites in question or the libraries they may be using.

--
Tim Parenti
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