title: How to format multiple date formats into single date in python
body: <p>I have a list in Python with different date formats:</p>
  
  <pre><code>list1 = ["30-4-1994", "1994-30-04", "30/04/1994",
           "30-apr-1994", "30/apr/1994","1994-30-apr"]
  </code></pre>
  
  <p>I want to format multiple date formats into a single date like <code>dd-mm-yyyy</code></p>
  
  <p>How can I do that?</p>