title: One-Time Git Commit using Filesystem Created as Author Date
body: <p>I have a project of which I have about 6 backup folders, each named after the date of the backup.   I am moving these to a Git system, and I want to preserve the date/time the files inside were created.  I do not want to use one date for all files in each backup (as I have seen in other SO questions), and I do not intend to use filesystem dating moving forward, as that would break tools like <code>make</code> etc.   I would like to "bring git up to speed" as it were, by committing each of these backup folders using the filesystem creation date <em>of each file</em> as the author date, and the last modified as the commit date.  This is a one time process that I will repeat 6 times, after which I will commit normally.  Is there a way to do this?  I'm really trying to preserve the code timeline.  Thanks!</p>