Russ Allbery <r...@debian.org> writes: > The required timeliness depends a lot on what you're using leap seconds > for, and in particular if you need to know about them far in advance, or > if it's only necessary to have an updated table before the leap second > itself arrives.
We need it to put correct time on astronomical registrations, so it is most important to have them once they are effective. Having them in advance would be an additional plus, however, since f.e. a computer may be disconnected during/after the observation, if that happens on a place without internet connection. Best regards Ole