bash-4.2$ touch -t 200103040506.07 jgoldschrafe

bash-4.2$ ls -l jgoldschrafe 
-rw-r--r-- 1 root root 0 Mar  4  2001 jgoldschrafe

bash-4.2$ stat jgoldschrafe 
  File: 'jgoldschrafe'
  Size: 0               Blocks: 0          IO Block: 4096   regular empty file
Device: 801h/2049d      Inode: 1932288     Links: 1
Access: (0644/-rw-r--r--)  Uid: (    1/    root)   Gid: (    1/    root)
Access: 2001-03-04 05:06:07.000000000 +0200
Modify: 2001-03-04 05:06:07.000000000 +0200
Change: 2012-07-19 17:54:30.000000000 +0300
 Birth: -

bash-4.2$ stat -c %Y jgoldschrafe 
983675167

bash-4.2$ stat -c %Y jgoldschrafe | date +%Y%m%d
20120719

bash-4.2$ date -d@$(stat -c %Y jgoldschrafe) +%Y%m%d
20010304

bash-4.2$ date --version
date (GNU coreutils) 8.17
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by David MacKenzie.