National Institute of Standards and Technology | NIST | Official US Time

PeterHolzwarth

My goodness, I didn't realize how many states are dual time zone. Florida, Oregon, Idaho, both of the Dakotas, and many more - I assume there's a historical reason for each, but that has got to play havoc with things at the state administrative level. And look at Michigan - given the odd spatial realities of the state, that's just bloody minded. I didn't realize Arizona was that county-by-county nuanced: I assumed the whole state did its own "screw clock changes" thing (tho the oddity of Wendover, a recent change, makes sense). And Puerto Rico looks to be doing Eastern time merely out of politeness.

sgarland

Fun fact, NIST also still runs the TIME protocol (RFC 868 [0]) [1]. 0: https://www.rfc-editor.org/rfc/rfc868 1: https://tf.nist.gov/tf-cgi/servers.cgi