title: Extracting two, rather than four, digit year from datetime object
body: <p>I am using the following code to create a new time variable in a pandas dataframe from a datetime object:</p>
  
  <pre><code>data['Date'] = pd.to_datetime(data['Date'])
  data['Year'] = data['Date'].apply(lambda x: x.year)
  data['Month'] = data['Date'].apply(lambda x: x.month)
  data['Day'] = data['Date'].apply(lambda x: x.day)
  data['time'] = data['Month'].map(str) + '/' + data['Day'].map(str)  
  +'/'+ data['Year'].map(str)
  data = data.drop(["Date", 'Year','Month',"Day"], axis=1)
  </code></pre>
  
  <p>Which produces the following 'time' column:</p>
  
  <pre><code> 0         2/4/2016
   1        8/16/2016
   2        9/28/2016
   3        9/29/2016
   4        10/5/2016
  </code></pre>
  
  <p>I would like the output to be like this instead:</p>
  
  <pre><code>0         2/4/16
  1        8/16/16
  2        9/28/16
  3        9/29/16
  4        10/5/16
  </code></pre>