The blog_archive_day named url pattern requires three arguments: year,
month, and day. Here is an example of how you'd use it in the
templates:
{% url blog_archive_day year="2009", month="feb", day="1" %}
If you're using it with the reverse method in a view you'd do:
reverse('blog_archive_day', kwargs={'year': '2009', 'month': 'feb',
'day': '1'})