Как отобразить 2 месяца в календаре в Django?

from datetime import datetime, timedelta
from calendar import HTMLCalendar
from .models import Event

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(start_time__day=day)
        d = ''
        for event in events_per_day:
            d += f'<li> {event.get_html_url} </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'{week}'
    
    # formats a month as a table
    # filter events by year and month
    def formatmonth(self, withyear=True):
        events = Event.objects.filter(start_time__year=self.year, start_time__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'
        months = self.month + (self.month + 1)
        for week in self.monthdays2calendar(self.year, self.month):
            cal += f'{self.formatweek(week, events)}\n'
        return cal

from datetime import datetime, timedelta, date
from django.shortcuts import render, get_object_or_404
from django.http import HttpResponse, HttpResponseRedirect
from django.views import generic
from django.urls import reverse
from django.utils.safestring import mark_safe
import calendar

from .models import *
from .utils import Calendar
from .forms import EventForm

def index(request):
    return HttpResponse('hello')

class CalendarView(generic.ListView):
    model = Event
    template_name = 'cal/calendar.html'

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        d = get_date(self.request.GET.get('month', None))
        cal = Calendar(d.year, d.month)
        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_month):
    if req_month:
        year, month = (int(x) for x in req_month.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

def event(request, event_id=None):
    instance = Event()
    if event_id:
        instance = get_object_or_404(Event, pk=event_id)
    else:
        instance = Event()

    form = EventForm(request.POST or None, instance=instance)
    if request.POST and form.is_valid():
        form.save()
        return HttpResponseRedirect(reverse('cal:calendar'))
    return render(request, 'cal/event.html', {'form': form})