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The leap second’s time is up: world votes to stop pausing clocks

nature.com

11–20 of 456 posts

Re: The leap second’s time is up: world votes to stop pausing clocks

#11
Hurrah!

Each leap second event causes hundred of millions of dollars worth of disruption and that's not including the disruption created by leapseconds even when they're not happening (e.g. the frequent false leap seconds) or the mini-disaster we're sure to experience should there be a negative leap second (which we are still trending towards).

The delays are unfortunate because it's harder to transition applications that need UT1 to use an offset from UTC when the available time sources are still unpredictably and unreliably leaping on you (since to apply a UT1 correction you need your UT1 offset and your UTC source to agree if and how a leap second has been applied).

From a practical perspective it would be better to immediately discontinue leaping, then UTC would immediately become a stable time that adjustments could be applied against for those few applications that need them. It would also save us from a negative leap second.

Re: The leap second’s time is up: world votes to stop pausing clocks

#13
So we make things worse for humans in order to make it easier for computers?

Yah, one second doesn't matter, but it builds up.

This: "Or we could even decouple our sense of time from the Sun entirely, to create a single world time zone in which different countries see the Sun overhead at different times of day or night."

Shows that they are completely disconnect from human reality: "Science already doesn’t use local times, we talk in UTC."

That's great for science, but people care about day vs night.

Re: The leap second’s time is up: world votes to stop pausing clocks

#14
How is this supposed to work? The rotation of the earth is not a constant. So we either scrap UT1 ("the atomic clock") or UTC ("the calendar"). Neither sound like an actual option. The latter would imply that at some (far off) point in the future you wake up at like 10pm as UTC and UT1 are now entirely mismatched (you may as well get rid of all time zones at that point).

Re: The leap second’s time is up: world votes to stop pausing clocks

#15

...but UTC is still offset from TAI by 37 seconds. Any plans to do anything about that, I wonder?

Once leap seconds actually stop TAI-UTC will presumably just have a constant offset. Constants are kind of irrelevant since they are very easy to deal with. Really no different than GPS time being exactly 19 seconds off TAI.

Re: The leap second’s time is up: world votes to stop pausing clocks

#17
post #3

Earlier quoted context omitted.

Did you read TFA? It's literally the first line of the second paragraph. The decision was made by representatives from governments worldwide at the General Conference on Weights and Measures (CGPM) outside Paris on 18 November.

So not the world? Title is misleading.

Nobody is confused by this, except those who are trying to be.

Re: The leap second’s time is up: world votes to stop pausing clocks

#18

> How, and whether, to keep atomic time in sync with Earth's rotation is still up for debate. […] > The CGPM — which also oversees the international system of units (SI) — has proposed that no leap second should be added for at least a century, allowing UT1 and UTC to slide out of sync by about 1 minute. But it plans to consult with other international organizations and decide by 2026 on what upper limit, if any, to…

The correct answer is obvious — to stabilize the Earth's rotation — but there are a few implementation details to work out.

Re: The leap second’s time is up: world votes to stop pausing clocks

#19
post #14

How is this supposed to work? The rotation of the earth is not a constant. So we either scrap UT1 ("the atomic clock") or UTC ("the calendar"). Neither sound like an actual option. The latter would imply that at some (far off) point in the future you wake up at like 10pm as UTC and UT1 are now entirely mismatched (you may as well get rid of all time zones at that point).

> The CGPM — which also oversees the international system of units (SI) — has proposed that no leap second should be added for at least a century, allowing UT1 and UTC to slide out of sync by about 1 minute.
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