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by throw0101a 2042 days ago
> I do hope we won't need a negative leap second, that would break a lot of code for sure.

Someone ended up asking on one of the FreeBSD mailing lists, and it seems that they test for it:

* https://lists.freebsd.org/pipermail/freebsd-stable/2020-Nove...

So at least when it comes to the FreeBSD kernel and ntpd, there's nothing to worry about there. Userland code may be a different matter of course.