【Django】日付フォームをカレンダー入力する方法

from django.db import models
from django.utils import timezone

class To_do(models.Model):
    deadline = models.DateField(verbose_name="期日", blank=False, null=False, default=timezone.now)
    task = models.CharField(verbose_name="タスク名", blank=False, null=False, max_length=10)

    def __str__(self):
        return self.task

from django.views import generic
import datetime

from .models import To_do
from .forms import To_doForm

today = datetime.datetime.today().date()

class IndexView(generic.TemplateView):
    template_name = 'to_do_list/index.html'

    def get_context_data(self, **kwargs):
        task = To_do.objects.all().order_by('deadline')

        context = super().get_context_data(**kwargs)
        context["today"] = today
        context["task"] = task
        context["form"] = To_doForm()

        return context

from django import forms

from .models import(
    To_do,
)

class To_doForm(forms.ModelForm):
    class Meta:
        model = To_do
        fields = (
            'deadline',
            'task',
        )
        widgets = {
            'deadline': forms.NumberInput(attrs={
                "type": "date"
            })
        }