(r'^(?P<year>\d{4})/(?P<mounth>\d{2})/$', archive_viewer),

class Post(models.Model):
    author = models.ForeignKey(User)
    date = models.DateTimeField()
    title = models.CharField(max_length=100)
    post = models.TextField()
    tags = models.ManyToManyField(Tag)

def archive(request, year=None, month=None):
    postlist = Post.objects.filter(date__year = year,
                                date__month = month).order_by('date')