title: django dateTimeWidget not showing up
body: <p>django newbie here. I have an attempt of a registration page.</p>
  
  <p>It consists of text fields (name, username, password, etc) and a DateField (birthday).</p>
  
  <p>I'm trying to use a forms.DateTimeInput widget for the DateField, but when the page is rendered, nothing happens. Am i doing something wrong? Does this have something im overlooking? It seems pretty simple, but i cant get it to work. </p>
  
  <p>This is my form</p>
  
  <pre><code>class RegisterForm(forms.Form):
      username  = forms.CharField(max_length= 50)
      password = forms.CharField(label=u'Password',widget = forms.PasswordInput(render_value=False))#password
  
      birthday = forms.DateField(required=False,initial=datetime.date.today,widget = forms.DateTimeInput())#25 Oct 2006
  </code></pre>
  
  <p>And my very simple HTML</p>
  
  <pre><code>&lt;form action="" method = "POST"&gt;
  {{ form.as_p}}
  &lt;input type='Submit' value='Register'/&gt;
  &lt;/form&gt;
  </code></pre>