title: Find the earliest and oldest date in a list of dates' string representation
body: <p>How can I convert this to a Python Date so I can find the latest date in a list?</p>
  
  <pre><code>["2018-06-12","2018-06-13", ...] to date
  </code></pre>
  
  <p>Then:</p>
  
  <pre><code>max(date_objects)
  min(date_objects)
  </code></pre>