title: Django datefield filter by weekday/weekend
body: <p>I've got a date_created field in my database:</p>
  
  <p><code>date_created = models.DateField(auto_now_add=True)</code></p>
  
  <p>Is there some way I could filter date_created by weekend/weekday? I know that python's date.weekday() returns 0 - 6 depending on days of the week, so I'd like to use something like:</p>
  
  <pre><code>apps.objects.filter(date_created__weekday &gt;=5) // filter by weekend
  </code></pre>