title: Series of datetime string to string format %d-%m-%Y
body: <p>What I'm looking for is a dataframe that has a date column, but it does not have the data type datetime64ns, it currently has type object with the following format YYYY-mm-DD I need to change this format to d-m-Y</p>
  
  <pre><code>0     2019-05-14 
  1     2019-05-14
  2     2019-05-14
  3     2019-05-14
  4     2019-05-14
  </code></pre>
  
  <p><code>dataframe['fefuente'].apply(lambda x: f'{x:%d-%m-%Y}')
  </code> 
  I currently have this code, but I get the following error ValueError: Invalid format specifier</p>
  
  <p>what he sought to obtain is something like this</p>
  
  <pre><code>0     14-05-2019
  1     14-05-2019
  2     14-05-2019
  3     14-05-2019
  4     14-05-2019
  </code></pre>