Last-Modified is a project mainly written in Vim Script, it's free.
Changes the Last modified date of a file
This is a mirror of http://www.vim.org/scripts/script.php?script_id=1362
It changes the Last modified date automatically without changing the format of the time you use Here i added some extra features ---- 1> It checks the time format in the file you are working on and the format given in the plugin. If both are same, it changes the time, other wise it shows you a warning. 2> It does not change any other thing in the file.