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189 points GordonS | 1 comments | | HN request time: 0.229s | source
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msla ◴[] No.19534075[source]
I'd be happy with everyone being extremely clear about the two kinds of time: Wallclock-time and duration-time.

What's the difference? Duration-time does not have leap-seconds.

I'll say it again: Duration-time does not have leap-seconds.

Once more: Duration-time does not have leap-seconds.

For duration-time without leap-seconds, give me TAI:

> International Atomic Time (TAI) is a statistical atomic time scale based on a large number of clocks operating at standards laboratories around the world that is maintained by the Bureau International des Poids et Mesures; its unit interval is exactly one SI second at sea level. The origin of TAI is such that UT1-TAI is approximately 0 (zero) on January 1, 1958. TAI is not adjusted for leap seconds. It is recommended by the BIPM that systems which cannot handle leapseconds use TAI instead.

https://tycho.usno.navy.mil/leapsec.html

Document that it is TAI.

Include in the documentation that TAI does not include leap-seconds.

Thank you.

replies(2): >>19534286 #>>19535401 #
1. ◴[] No.19534286[source]