title: Django filter datetime base on date only
body: <p>I'm trying to filter the query set in the BaseDatatableView on a date that's entered in by the user in the following format: mm/dd/yyyy. So start_date is in that format and will get converted to a datetime with strptime, see below.</p>
  
  <p>I'd like to compare it to exactly a date datetimefield in the db, but i'd like to match the month, day, year exactly, disregarding the time. This is what I have so that doesn't work.</p>
  
  <pre><code>class AppointmentListJson(LoginRequiredMixin, BaseDatatableView):
               ....
      start_date = params.get('start_date', '')
      if start_date:  
          qs = qs.filter(start_date__contains=datetime.strptime(
              start_date, DATE_FORMAT))
  
      return qs
  </code></pre>
  
  <p>Thanks</p>