Jonathan Leffler <[email protected]> #include <disclaimer.h> Guardian of DBD::Informix - v2018.1031 - http://dbi.perl.org "Blessed are we who can laugh at ourselves, for we shall never cease to be amused."
On Tue, Nov 4, 2025 at 12:46 Matt Johnson-Pint via tz <[email protected]> wrote: > IMHO, AI slop doesn't warrant much of a response... but just to be > pedantic: > > - IANA zone America/Phoenix covers the primary concern > - Phoenix uses UTC-7, not UTC+7 > - IANA doesn't deal with display names > - "Phoenix Standard Time (PST)" would be abhorrent for a display name, > confused easily with "Pacific Standard Time (PST)" (UTC-8) > - 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. > > Did I miss anything? > Some parts of Arizona do use DST (Navajo nation), and within that, another part (Hopi nation) does not use DST. https://www.timeanddate.com/time/us/arizona-no-dst.html > > On Tue, Nov 4, 2025 at 11:39 AM David Braverman via tz <[email protected]> > wrote: > >> Sorry, that wasn’t fair. >> >> >> >> Akbar, the time zone you’re looking for is America/Phoenix. It’s in the >> northamerica data file and it goes back to the advent of standard time in >> 1883. >> >> >> >> David Braverman >> >> >> >> *From:* David Braverman via tz <[email protected]> >> *Sent:* Tuesday 4 November 2025 13:35 >> *To:* [email protected] >> *Subject:* [tz] Re: Phoenix AZ timezone issue >> >> >> >> Who’s going to tell him? >> >> >> >> David Braverman >> >> Inner Drive Technology >> >> >> >> *From:* akbar--- via tz <[email protected]> >> *Sent:* Tuesday 4 November 2025 13:08 >> *To:* [email protected] >> *Subject:* [tz] Phoenix AZ timezone issue >> >> >> 🧭 *Problem Summary* >> >> · Arizona remains one of the few U.S. states that *does not >> observe Daylight Saving Time (DST)* since 1968. >> >> · However, it identifies its time zone as *Mountain Standard >> Time (MST)* — which *does* change to MDT when DST applies elsewhere. >> >> · Because of this, every spring and fall, Arizona’s effective >> time alignment shifts: >> >> o In *summer*, Arizona matches *Pacific Daylight Time (PDT)*. >> >> o In *winter*, it matches *Mountain Standard Time (MST)*. >> >> · This causes *systemic issues* in digital calendars, automated >> scheduling, flight bookings, and cross-state business coordination, >> requiring frequent manual adjustments. >> 💡 *Recommended Solution* >> >> *Create and declare a dedicated time zone: “Phoenix Standard Time.”* >> >> · This would be a fixed, non-DST time zone officially recognized >> by IANA (the Internet Assigned Numbers Authority) and major platforms >> (Microsoft, Apple, Google). >> >> · All digital devices could use it as a *unique time zone >> identifier* that never shifts with DST — eliminating confusion and >> rescheduling errors. >> >> · It would function similarly to “UTC+7” year-round but would >> display as “Phoenix Standard Time (PST)” in software systems. >> >> >> >> Thank you >> >> Akbar Jaffer >> >> >> >> >> >> >> >> Akbar Jaffer >> >> Office: (415) 335-6950 >> >> Mobile: (650) 430-0232 >> Web: Marketing-QA.com <http://www.marketing-qa.com/> >> >> Meeting: Book time W/Akbar <https://calendly.com/ajaffer/> >> >> LinkedIn <https://www.linkedin.com/in/akbarjaffer/> | POI Blog >> <https://pointofintersection.org/> >> >> >> >
