title: Can Pandas plot a histogram of dates?
body: <p>I've taken my Series and coerced it to a datetime column of dtype=<code>datetime64[ns]</code> (though only need day resolution...not sure how to change). </p>
  
  <pre><code>import pandas as pd
  df = pd.read_csv('somefile.csv')
  column = df['date']
  column = pd.to_datetime(column, coerce=True)
  </code></pre>
  
  <p>but plotting doesn't work:</p>
  
  <pre><code>ipdb&gt; column.plot(kind='hist')
  *** TypeError: ufunc add cannot use operands with types dtype('&lt;M8[ns]') and dtype('float64')
  </code></pre>
  
  <p>I'd like to plot a histogram that just <strong>shows the count of dates by week, month, or year</strong>.</p>
  
  <p>Surely there is a way to do this in <code>pandas</code>?</p>