I just read my logcheck email, and one box scared me:

Jan  1 00:59:59 dumbledore kernel: Clock: inserting leap second 23:59:60 UTC
Jan  2 00:59:59 dumbledore kernel: Clock: inserting leap second 23:59:60 UTC

It had two leap seconds. None today though…

All the others, running the same software, had only one leap second, on 1.1.