title: Date query on mongodb with Python returns empty
body: <p>I need to fetch data based on specified date from mongodb. When I try code below, I get an empty list. When I check db, I see documents with specified dates.</p>
  
  <p>My code is:</p>
  
  <pre><code>db = connect.order_db
  
  select_date_iso = datetime.date(2020,2,18).isoformat()
  
  result = db.koleksiyon.find({u"zaman_pulu": select_date_iso}).sort("zaman_pulu")
  
  for num, doc in enumerate(result):
      print (num, "--", doc, "\n")
  </code></pre>
  
  <p>And a record inside db:</p>
  
  <p><a href="https://i.stack.imgur.com/I7kB3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/I7kB3.png" alt="enter image description here"></a></p>
  
  <p>no error but no data also.</p>