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moskie
on June 18, 2012
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Falsehoods Programmers believe about Time
Day light savings transition days. When you skip ahead, that day has 23 hours in it. When you fall back, it has 25.
mbrubeck
on June 18, 2012
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Also leap seconds:
https://en.wikipedia.org/wiki/Leap_second
JoshTriplett
on June 18, 2012
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Also, any other change to the system clock. NTP will either slew or step the system clock to keep it synchronized with the upstream time source. And the user can explicitly set the clock, as well. See also assumptions 9 and 10.
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