title: find command - mtime option doesn't work for files older than 25 days
body: <p>I am using find command to find directories older than 30 days and copy them in other directory.</p>
  
  <pre><code>find /STORAGE/RECORDS/XXXXX/ -maxdepth 1 -type d -daystart -mtime +30  -exec cp -rp {} /STORAGE/RECORDS/old_archive_XXXXX/ \;
  </code></pre>
  
  <p>The problem is that this code doesn't work but it looks corect.
  When I change the <code>mtime</code> option to 25 days it works.</p>
  
  <p>I cant see where is the problem.</p>