title: How to subtract 5 minute from date
body: <p>I have this data:</p>
  
  <pre><code>`date +%Y-%m-%d`" 00:00:00"
  </code></pre>
  
  <p>that return <code>2015-10-08 00:00:00</code></p>
  
  <p>I would like cancel 5 minute:</p>
  
  <pre><code>2015-10-07 23:55:00
  </code></pre>
  
  <p>Many thanks</p>