title: pandas TimeStamp subtraction?
body: <p>Why does the following code produce the same results?</p>
  
  <p>Is there a way to subtract date from pandas TimeStamp?</p>
  
  <pre><code>print s['ADM.DT'] + pd.DateOffset(month=2)
  print s['ADM.DT'] - pd.DateOffset(month=2)
  </code></pre>
  
  <p>s['ADM.DT'] is pandas.tslib.Timestamp object.</p>