On Fri, 6 Dec 2024 at 14:46, Guy Harris via tz <tz@iana.org> wrote:
On Dec 6, 2024, at 4:05 AM, Arthur Olson via tz <tz@iana.org> wrote:

> May be best to be specific about the nature of the USDOT map (since it does not cover variations such as those within Arizona).

I.e., it covers time zones:

        https://en.wikipedia.org/wiki/Time_zone

rather than what we call "timezones", no space:

        https://data.iana.org/time-zones/theory.html

That's a somewhat different, subtler distinction where the latter includes divergence in historical timekeeping practice, whereas the former is more broadly rooted in present-day practice.

It's perhaps a bit more accurate to simply say that such variations are not reflected on the USDOT map because those variations are not a part of US federal law.

--
Tim Parenti