带有MonthArchiveView的Url给我错误404

我决定使用泛型类MonthArchiveView。

主页的url和url一样,年复一年地传递,但我得到了一个404错误

class BookingListView(ListView, MonthArchiveView):
    model = models.Booking
    queryset = models.Booking.objects.order_by('-date_start')
    paginate_by = 80
    template_name = 'events/archive_list.html'
    context_object_name = 'object_list'
    date_field = 'date_start'
    allow_future = True

    def get_context_data(self, **kwargs):
        context = super(BookingListView, self).get_context_data(**kwargs)
        context['mode'] = 'archive'
        return context

我的url:

url(r'^(?P<year>[0-9]{4})/(?P<month>\d{2})/$', views.BookingListView.as_view(), name="list"),

我与参数的链接已硬编码):

<a href="{% url 'archive:list' 2017 09 %}" title="{% trans 'Archive' %}">
{% trans 'Archive' %}#}
</a>