Yes

On Wed, Nov 5, 2025, 5:11 AM Clive D.W. Feather <clive@davros.org> wrote:
Matt Johnson-Pint via tz said:
>    - In the United States, the English names of time zones are regulated
>    by congress via 49 CFR 71, so one cannot just propose new display names
>    willy-nilly.

So isn't Phoenix just in Mountain Standard Time (MST) all year round?

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