title: Specify date fomat for sqlalchemy Date column
body: <p>I am working with sqlalchemy and create my initial test database with this small script:</p>
  <pre><code>with db_session() as session:
  
      test_object = TestObject(
          start=datetime.strptime(&quot;2021-01-06 22:00:00&quot;, &quot;%Y-%m-%d %H:%M:%S&quot;),
          ...
      )
      session.add(test_object)
      session.commit()
  </code></pre>
  <p>My Model looks like this:</p>
  <pre><code>class TectObject(Model):
      start = Column(Date, name=&quot;start&quot;)
      ...
  </code></pre>
  <p>I am saving my data in a sqlite database table.
  When I query my object using flask, I get a different format back:</p>
  <pre><code>query = session.query(TestObject).filter(TestObject.id == id)
  event = jsonify(query.first().asdict())
  --------------- OUTPUT --------------------------------------------
  {
   start&quot;: &quot;Wed, 06 Jan 2021 22:00:00 GMT&quot;
   ...
   }
  </code></pre>
  <p>How do I specify the sqlalchemy Model to only use the format  &quot;%Y-%m-%d %H:%M:%S&quot;?</p>
  <p>Thanks in advance!</p>