@tubetime This is probably the code triggering the warning:

https://github.com/csrg/original-bsd/blob/master/sys/sparc/sparc/clock.c#L403-L408

It seems to be checking for dates too far in the past (before 1975, by the look) rather than too far in the future. I wonder if it is reading a zeroed sector on the disk where a unix timestamp would be in a running system?