title: Django 1.9 DateTime Filter
body: <p>I'm attempting to filter a model that contains the field below:</p>
  
  <pre><code>TEMP_START = models.DateTimeField(null=True)
  </code></pre>
  
  <p>And I'm using the syntax</p>
  
  <pre><code>x.filter(TEMP_START__date = datetime.datetime(2016, 3, 31, 8, 0, tzinfo=&lt;UTC&gt;))
  </code></pre>
  
  <p>However, this returns multiple unique TEMP_START values. I am thinking this is due to my data being stored without time zones. But, I have set in my settings.py file:</p>
  
  <pre><code>TIME_ZONE = 'UTC' # 'America/Chicago'
  
  USE_I18N = True
  
  USE_L10N = True
  
  USE_TZ = True
  </code></pre>
  
  <p>I am unsure why other unique datetime object values are being returned by this filter statement. I am aware the "__date" filter is new to Django 1.9. Is this just a bug?</p>