title: git - How to list all files that have not been changed since a certain date?
body: <p>I'm trying to get a list of files in my repository that have not been touched since a certain date. </p>
  
  <p>I was trying to make use of <code>git log --before="X months ago" --name-only</code> and then comparing that list against <code>git log --after="X months ago" --name-only</code> but I'm not sure if there's an easier way?</p>
  
  <p>That or is there a way to get the HEAD commit's date of each file and filter the list? I am unsure of what the best approach is for this. </p>