title: Pandas Convert Week Date to Weekend Friday Date
body: <p>I have a pandas data frame with a column that has dates like so:</p>
  
  <pre><code>DATE
  01/16/2017
  01/17/2017
  01/18/2017
  01/19/2017
  01/20/2017
  </code></pre>
  
  <p>I need to convert each of those dates to a weekend date that is the date of the Friday of that corresponding week. So add a new column resulting in a data frame that looks like this:</p>
  
  <pre><code>DATE       WEEK_ENDING
  01/16/2017  01/20/2017
  01/17/2017  01/20/2017
  01/18/2017  01/20/2017
  01/19/2017  01/20/2017
  01/20/2017  01/20/2017
  </code></pre>
  
  <p>Essentially I am looking for a Pandas solution to this question
  <a href="https://stackoverflow.com/questions/41068602/for-a-date-get-the-friday-of-the-week-ending">for a date get the friday of the week ending</a></p>
  
  <p>The format of the date itself is not that important. Is there a built in function that can do this or will I have to write one? Thanks!</p>