They usually have an offset and a DST option. So in Arizona you'd choose -7/Off, and never touch it again. In Colorado you'll have to toggle DST twice a year manually, because it doesn't know the rules for when it starts/ends.
Oh, is there no “DST in effect” flag in the signal?
As I understand it, the US switches at the same day across the country (for the states that do have it), so that should theoretically be possible.
Re:60 kHz (2022)
by quintushoratius on Saturday June 01, 2024 @06:39AM
(#40544502)
Not every region of the continental US respects DST.
I know, but if it does, it switches on the same day as all the others, which could be encoded in the signal, and it seems like it is [1].
So instead of a switch to “add an hour”, there could be one that says “add an hour if the signal says DST is currently in effect”.
[1] https://en.wikipedia.org/wiki/WWVB#Amplitude-modulated_time_...
The time code format does include a DST bit.
https://www.nist.gov/pml/time-and-frequency-division/time-di...
You shouldn't have to toggle DST manually; it's encoded at :57-58.
That said, my clock stopped syncing for some reason, so ...
Do these usually have an adjustment button for a time zone offset? And how do they handle DST – do they have an "I'm in Arizona (but not in the Navajo Nation), leave me on standard time" switch?