title: Timezone.now() vs datetime.datetime.now()
body: <p>When should I be using django's <code>timezone.now()</code> and when should I be using python's <code>datetime.datetime.now()</code>.</p>
  
  <p>For example, in the following <code>INSERT</code> which would make more sense?</p>
  
  <pre><code>- Product.objects.create(title='Soap', date_added=datetime.datetime.now())
  - Product.objects.create(title='Soap', date_added=timezone.now())
  </code></pre>
  
  <p>Is there a rule of thumb on when to use each?</p>