title: git log --since=<date> options
body: <p>I'm currently learning Git by following the book &quot;Pro Git&quot;.</p>
  <p>In the book, when discussing different options for <code>git log --since=&lt;date&gt;</code>, the author said some of the potential options for the <code>&lt;date&gt;</code> are</p>
  <pre><code>git log --since=2.weeks
  git log --since=&quot;2008-01-15&quot;
  git log --since=&quot;2 years 1 day 3 minutes&quot;
  </code></pre>
  <p>I was wondering, where can I find a complete list of what I can use as a date format in the <code>--since=&lt;date&gt;</code> option?</p>
  <p>I have looked at the <a href="https://git-scm.com/docs/git-log" rel="nofollow noreferrer">git log manpage on git-scm.com</a> as well as searched the git-scm.com but I can't find it.</p>