title: Models.DateField Format issues
body: <p>I have a model, which has a date field</p>
  
  <pre><code>date_of_birth = models.DateField(blank=True, null=True, verbose_name="DOB")
  </code></pre>
  
  <p>I would like to format it to save dates in the format <code>dd/MM/yyyy</code>, but everything I have tried fails.</p>
  
  <p>I think the default must be <code>YYYY-MM-dd</code> because that is how it saves to my database. Trying to submit dates in a different format gives the error:</p>
  
  <pre><code>[u"'17/01/1970' value has an invalid date format. It must be in YYYY-MM-DD format."]
  </code></pre>
  
  <p>I have tried using <a href="https://docs.djangoproject.com/en/1.7/ref/forms/widgets/" rel="noreferrer">Date Widgets</a> but am having a few issues getting it to be compatible with my models.py</p>