Warner Losh writes:
> So my first choice is
> always 'none, cope with shifting civil time on the scale of centuries' but
> my second choice is 'schedule for the long-term average and don't worry
> about going > 1s' .
The long-term average used to be "a leapsecond every 18 months -
give
Terrawatch: why has the Earth’s spinning inner core slowed down?
https://www.theguardian.com/science/2023/feb/22/terrawatch-earth-spinning-inner-core-slowed-down
Multidecadal variation of the Earth’s inner-core rotation
