Unix epoch changed?

I'm trying to figure how a file can have a date _before_ unix epoch.
I think real date would be 2036 or something similar...
This happens on local disk of 4.7-STABLE (my server), 5.0-CURRENT (the
desktop) and on 4.7 exported and mounted from 5.0.
/usr/ports/distfiles is exported on 4.7, /usr/ports is local on both
4.7 and 5.0 for building.

You can get my copy of mirrormagic tarball (games/mirrormagic) from my
server if can help.
	ftp://ftp.torrini.org/pub/FreeBSD/mirrormagic-1.3.tar.gz
and
	ftp://ftp.torrini.org/pub/FreeBSD/mirrormagic-1.3.tar.gz.tar
The second one just in case ftpd change or reset date...
# tar tvpf mirrormagic-1.3.tar.gz.tar 
-rw-r--r-- root/wheel   371444 Dec 12 13:03 1909 mirrormagic-1.3.tar.gz

Also note that where not specified with stable#/current# prompt I can
obtain the same output from both.


current# uname -v
FreeBSD 5.0-CURRENT #55: Sat Mar 29 23:51:53 CET 2003 ...

stable# uname -v
FreeBSD 4.7-STABLE #34: Sun Jan 26 03:55:24 CET 2003 ...


# cd /usr/ports && find . -mtime -2 -exec ls -lnd {} \;
drwxr-xr-x  83 0  0  168960 Apr  8 18:30 ./distfiles
drwxr-xr-x  2 0  0  512 Apr  8 15:34 ./distfiles/KDE
-rw-r--r--  1 0  0  17388037 Dec 21  1909 ./distfiles/xc/X336src-1.tgz
-rw-r--r--  1 0  0  14834083 Dec 21  1909 ./distfiles/xc/X336src-2.tgz
-rw-r--r--  1 0  0  371444 Dec 12  1909 ./distfiles/mirrormagic-1.3.tar.gz

# ls -lnd  www/mozilla distfiles distfiles/KDE distfiles/xc/X336src-1.tgz \
	distfiles/xc/X336src-2.tgz distfiles/mirrormagic-1.3.tar.gz
drwxr-xr-x  83 0  0    168960 Apr  8 18:30 ./distfiles
drwxr-xr-x   2 0  0       512 Apr  8 15:34 ./distfiles/KDE
-rw-r--r--   1 0  0    371444 Dec 12  1909 ./distfiles/mirrormagic-1.3.tar.gz
-rw-r--r--   1 0  0  17388037 Dec 21  1909 ./distfiles/xc/X336src-1.tgz
-rw-r--r--   1 0  0  14834083 Dec 21  1909 ./distfiles/xc/X336src-2.tgz
drwxr-xr-x   3 0  0       512 Apr  8 21:40 ./www/mozilla

current# cp -p distfiles/mirrormagic-1.3.tar.gz /tmp/
current# ls -l /tmp/mirrormagic-1.3.tar.gz 
-rw-r--r--  1 0  0  371444 Dec 12  1909 /tmp/mirrormagic-1.3.tar.gz


-- 
Riccardo.