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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 m
by V99 2y ago
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.
- lxgr 2y agoOh, 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.
- deleted 2y ago[deleted]
- quintushoratius 2y agoNot every region of the continental US respects DST.
- lxgr 2y agoI 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_code https://en.wikipedia.org/wiki/WWVB#Amplitude-modulated_time_...
- joezydeco 2y agoThe time code format does include a DST bit. https://www.nist.gov/pml/time-and-frequency-division/time-distribution/radio-station-wwv/wwv-and-wwvh-digital-time-code https://www.nist.gov/pml/time-and-frequency-division/time-di...
- o11c 2y agoYou shouldn't have to toggle DST manually; it's encoded at :57-58. That said, my clock stopped syncing for some reason, so ...
- wglb 2y agoThe one remaining clock I have took a hard fall, and no longer syncs.