And leap seconds will stop working (as currently specified) in one or two thousand years when the earth is slow enough that we need ~12 each year. Time zone adj

And leap seconds will stop working (as currently specified) in one or two thousand years when the earth is slow enough that we need ~12 each year. Time zone adjustments will continue to work much longer. https://www.ucolick.org/~sla/leapsecs/dutc.html https://www.ucolick.org/~sla/leapsecs/dutc.html There is a confounding issue, though: the continual messing around with daylight saving means that time zones have to be relatively easy to alter. But if (as seems likely) daylight saving is abolished, this flexibility will ossify, so it might not be so easy to use in the distant future…