title: How to check if a pandas Series contains Timestamps?
body: <p>Following seems to work at least in some cases:</p>
  
  <pre><code>series.dtype == np.dtype('&lt;M8[ns]')
  </code></pre>
  
  <p>but it doesn't look pretty and I'm not sure if it works always (with all(?) kinds of Timestamps).</p>
  
  <p>Is there a nicer way for testing whether a column contains Timestamps?</p>