Преобразование встроенного класса python/django "calendar" в локальный календарь (перс.)

Я создал html календарь используя встроенный класс календаря в Django, теперь мне нужно преобразовать его в локальный календарь "Persian", я пытался использовать пакет django-jalali-date, но не смог получить успешный результат. и еще одна проблема - кнопки prevmonth и next month перенаправляют пользователя на страницу not found. пожалуйста, посоветуйте как решить эти проблемы

in utils.py:

class Calendar(HTMLCalendar):
    def __init__(self, year=None, month=None):
        self.year = year
        self.month = month
        super(Calendar, self).__init__()

    # formats a day as a td
    # filter events by day
    def formatday(self, day, events):
        events_per_day = events.filter(time_start__day=day)
        d = ''
        for event in events_per_day:
            d += f'<li> {event.title} </li>'

        if day != 0:
            return f"<td><span class='date'>{day}</span><ul> {d} </ul></td>"
        return '<td></td>'

    # formats a week as a tr
    def formatweek(self, theweek, events):
        week = ''
        for d, weekday in theweek:
            week += self.formatday(d, events)
        return f'<tr> {week} </tr>'

    # formats a month as a table
    # filter events by year and month
    def formatmonth(self, withyear=True):
        events = tb_order.objects.filter(time_start__year=self.year, time_start__month=self.month)

        cal = f'<table border="0" cellpadding="0" cellspacing="0" class="calendar">\n'
        cal += f'{self.formatmonthname(self.year, self.month, withyear=withyear)}\n'
        cal += f'{self.formatweekheader()}\n'
        for week in self.monthdays2calendar(self.year, self.month):
            cal += f'{self.formatweek(week, events)}\n'
        return cal

в урлах:

path('testcal/',views.CalendarView.as_view(),name="cal"),

в файле views.py :

class CalendarView(generic.ListView):
    model = tb_order
    template_name = 'pline/testcalender.html'

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)

        # use today's date for the calendar
        d = get_date(self.request.GET.get('day', None))

        # Instantiate our calendar class with today's year and date
        cal = Calendar(d.year, d.month)

        # Call the formatmonth method, which returns our calendar as a table
        html_cal = cal.formatmonth(withyear=True)
        context['calendar'] = mark_safe(html_cal)
        context['prev_month'] = prev_month(d)
        context['next_month'] = next_month(d)
        return context

def get_date(req_day):
    if req_day:
        year, month = (int(x) for x in req_day.split('-'))
        return date(year, month, day=1)
    return datetime.today()

def prev_month(d):
    first = d.replace(day=1)
    prev_month = first - timedelta(days=1)
    month = 'month=' + str(prev_month.year) + '-' + str(prev_month.month)
    return month

def next_month(d):
    days_in_month = calendar.monthrange(d.year, d.month)[1]
    last = d.replace(day=days_in_month)
    next_month = last + timedelta(days=1)
    month = 'month=' + str(next_month.year) + '-' + str(next_month.month)
    return month

в html-странице :

{% block content %}
  <div id="content-main">
         <div class="clearfix">
   <a class="btn btn-info left" href="{'% url 'cal:calendar' %}?{'{ prev_month }}"> Previous Month </a>
   <a class="btn btn-info right" href="{'% url 'cal:calendar' %}?{'{ next_month }}"> Next Month </a>
</div>

        {{ calendar }}



      <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
    crossorigin="anonymous"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
    crossorigin="anonymous"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
    crossorigin="anonymous"></script>

      {% endblock content %}

Результатом является :

1- преобразование html-таблицы Django в персидский календарь

2- получить следующий и предыдущий месяц на основе текущего месяца

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