[tz] Re: How permanent daylight saving time or permanent standard time would affect the USA

<<On Thu, 12 Dec 2024 22:48:35 -0800, Guy Harris via tz <tz@iana.org> said:

Or do they have, for example, a switch that controls whether to observe DST or not?

The WWVB-synced alarm clocks that I have had instructed users in Arizona (and, at the time, Indiana) to change their time zone setting when the rest of the country switches. They did not have a "disable DST" setting. Curiously, although WWVB transmits a flag bit for "DST in effect", the first such clock I had did not use it, and I had to get a new one when the rules changed. -GAWollman