Как добавить событие на несколько дат одновременно в HTMLкалендаре

Я использую модуль htmlcalendar в Django. При добавлении события путем задания периода я хочу, чтобы событие добавлялось в одно и то же время в соответствующую дату

В коде, реализованном на данный момент, можно добавлять события только на 1 день. Что нужно изменить, чтобы получить желаемый результат?

models.py

class Leave(models.Model):
    name = models.CharField(max_length=50, blank=True, null=True)
    leave_date_from = models.DateField(blank=True, null=True)
    leave_date_to = models.DateField(blank=True, null=True) ----> I just added this field
    take_over = models.TextField(blank=True, null=True)
    create_date = models.DateTimeField(auto_now_add=True)
    update_date = models.DateTimeField(auto_now=True)

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(leave_date__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'<tr> {week} </tr>'

    # formats a month as a table
    # filter events by year and month
    def formatmonth(self, withyear=True):
        events = Leave.objects.filter(leave_date__year=self.year, leave_date__month=self.month, is_deleted=False)

    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

forms.py

class LeaveForm(ModelForm):
    class Meta:
    model = Leave
    # datetime-local is a HTML5 input type, format to make date time show on fields
    widgets = {
      'leave_date_from': DateInput(attrs={'type': 'datetime'}, format='%Y-%m-%d'),
      'leave_date_to': DateInput(attrs={'type': 'datetime'}, format='%Y-%m-%d')   ---> i just added
}
    fields = ['name', 'leave_date_from', 'leave_date_to', 'take_over', 'memo']

  def __init__(self, *args, **kwargs):
    super(LeaveForm, self).__init__(*args, **kwargs)
    # input_formats to parse HTML5 datetime-local input to datetime field
    self.fields['leave_date_from'].input_formats = ('%Y-%m-%d',)
    self.fields['leave_date_to'].input_formats = ('%Y-%m-%d',) ---> i just added

views.py

class CalendarView(generic.ListView):
model = Leave
template_name = 'pages/leave/leave.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('month', None))
    context['prev_month'] = prev_month(d)
    context['next_month'] = next_month(d)

    # Instantiate our calendar class with today's year and date
    cal = Calendar(d.year, d.month)
    cal.setfirstweekday(6)

    # Call the formatmonth method, which returns our calendar as a table
    html_cal = cal.formatmonth(withyear=True)
    context['calendar'] = mark_safe(html_cal)
    context['leave'] = Leave.objects.filter(is_deleted=0)
    return context

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

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


def leave(request, leave_id=None):
    instance = Leave()
    if leave_id:
        instance = get_object_or_404(Leave, pk=leave_id)
    else:
        instance = Leave()

form = LeaveForm(request.POST or None, instance=instance)
if request.POST and form.is_valid():
    form.save()
    return HttpResponseRedirect(reverse('leave:calendar'))
return render(request, 'pages/leave/leave_add.html', {'form': form})

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