1 Jan 1970 is in the future apparently but 2 Jan isn't.

[Andrew Gallagher]

# ls -al antediluvian 
-r--r--r--    1 root     root          351 Jan  1  1970 antediluvian
# make --version
GNU Make version 3.79.1, by Richard Stallman and Roland McGrath.
Built for i586-pc-linux-gnu
Copyright (C) 1988, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000
        Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.

Report bugs to <address@hidden>.

# make test
make: *** Warning: File `antediluvian' has modification time in the future 
(1970-01-01 00:00:00 > 2002-02-06 13:57:22)
touch /tmp/test
make: warning:  Clock skew detected.  Your build may be incomplete.
# touch --date="2 Jan 1970" antediluvian
# rm /tmp/test 
# make test
touch /tmp/test
#

-- 
| Andrew Gallagher                  <address@hidden> |
| Computer Support Asst., Dept. of Applied Maths and Theoretical     |
| Physics, Queen's University of Belfast, BT7 1NN, N. Ireland        |
| andrewgallagher.tripod.com | web.am.qub.ac.uk/~ab.gallagher/pubkey |