All internal time should be linear, and UTC should only be displayed in UI. POSIX is to blame here.6
Yet another reason no system not dealing with high-precision time-synchronized physical measurements should ever touch leap seconds.https://twitter.com/dgryski/status/815811732501393408 …
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POSIX time is linear. It's mainline NTP's fetish with leap seconds imposed on top of POSIX that's nonlinear.
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Only TAI is linear. POSIX time is not TAI (except on systems like mine). How can you say POSIX time is linear?
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Perhaps "linear" is underspecified and you have some idea of "linear" that I don't.
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Time as a physically invariant quantity only makes sense within a single inertial frame. Using SI secs (TAI) to coordinate...
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...human activity across different frames by declaring one canonical is completely arbitrary, not "more correct".
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The only things that matter are continuity, monotonicity, local uniformity, and having _a_ common reference time.
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I guess "linearity" is what you'd call "global uniformity". A TAI second is the same no matter when it happens. I like that.
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