title: UTC to PST with multiple columns using Python
body: <p><strong>Background</strong></p>
  
  <p>I have a dataframe, df:
  I would like to convert the date timestamps from UTC to PST in both columns.</p>
  
  <pre><code>  Connected                    Ended
  
    3/3/2020 1:00:00 PM          3/3/2020 1:01:00 PM
    3/4/2020 4:00:00 PM          3/4/2020 4:05:00 PM
  </code></pre>
  
  <p><strong>Desired Output:</strong></p>
  
  <pre><code>  ConnectedPST                 EndedPST
  
    3/3/2020 6:00:00 AM          3/3/2020 6:01:00 AM                    
    3/4/2020 9:00:00 AM          3/4/2020 9:05:00 AM
  </code></pre>
  
  <p><strong>Structure:</strong></p>
  
  <pre><code>   'Connected    Ended\n0  3/3/2020 1:00:00 PM  3/3/2020 1:01:00 PM\n1  3/4/2020     4:00:00 PM  3/4/2020 4:05:00 PM'
  </code></pre>
  
  <p><strong>What I have tried:</strong></p>
  
  <pre><code> from datetime import datetime
   from pytz import timezone
  
   datetime_obj_pacific = timezone('US/Pacific').localize(datetime_obj_naive)
   print datetime_obj_pacific.strftime ("%Y-%m-%d %H:%M:%S %Z%z")
  </code></pre>
  
  <p>However, I am not sure how to incorporate this into my dataframe.
  Any assistance is appreciated.</p>