title: How to format date string via multiple formats in python
body: <p>I have three date formats: <code>YYYY-MM-DD</code>, <code>DD.MM.YYYY</code>, <code>DD/MM/YYYY</code>.</p>
  
  <p>Is it possible to validate and parse strings such as <code>2014-05-18</code> or <code>18.5.2014</code> or <code>18/05/2019</code>?</p>