title: Convert date from dd-mm-yy to dd-mm-yyyy using python
body: <p>I have a date input 'date_dob' which is '20-Apr-53'
  I tried converting this to  format yyyy-mm-dd using following code:</p>
  
  <pre><code>print pd.to_datetime(date_dob,format = '%d-%b-%y')
  </code></pre>
  
  <p>which returns '2053-04-20 00:00:00' instead of '1953-04-20 00:00:00'</p>