django filter: datetime filed filter not working

Pease help me with next. I create NotesFilter based on django_filters.FilterSet. All filters are working except datetime. I tried everything, but something is wrong and it isn't working. The list is empty when I enter any value in any format in the field "Reminder contains:" on the web page.

filter.py:

class NotesFilter(django_filters.FilterSet):

    SORT_BY_ = (
        ('title+', 'Title(A-Z)'),
        ('title-', 'Title(Z-A)'),
        ('reminder_data_time+', 'Reminder (0-9)'),
        ('reminder_data_time-', 'Reminder (9-0)'),
    )

    sort = django_filters.ChoiceFilter(label='Order by:', choices=SORT_BY_,
                                       method='filter_')
    class Meta:
        model = Notes
        fields = {
            'notes_category': ['exact', ],
            'title': ['icontains', ],
            'reminder_data_time': ['icontains',]
        }

    def filter_(self, queryset, name, value):
        if value == 'title+':
            sort = 'title'
        elif value == 'title-':
            sort = '-title'
        elif value == 'reminder_data_time+':
            sort = 'reminder_data_time'
        elif value == 'reminder_data_time-':
            sort = '-reminder_data_time'
        return queryset.order_by(sort)

models.py:

class Notes(models.Model):
    title = models.CharField(max_length=25)
    text = models.TextField()
    data_time = models.DateTimeField(auto_now_add=True)
    reminder_data_time = models.DateTimeField(default=datetime.datetime.now())
    notes_category = models.ForeignKey(NotesCategory, on_delete=models.CASCADE)

    class Meta:
        verbose_name_plural = "Notes"

    def __repr__(self):
        return self.title

    def __str__(self):
        return self.title

    def get_absolute_url(self):
        return reverse('detail_note', args=[str(self.id)])

notes.html:

[![<form method="get">
    {% for choice in filter.form %}
        {%  if choice.name == 'notes_category' %}
            <td>Category: {{ choice }}</td>
        {%  elif choice.name == 'title__icontains' %}
            <td>Title contains: {{ choice }}</td>
        {%  elif choice.name == 'reminder_data_time__icontains' %}
            <td>Reminder contains: {{ choice }}</td>
        {%  elif choice.name == 'sort' %}
            <td>Sort by: {{ choice }}</td>
            <td> 
                <div class="btn-small-group">
                    <button type="submit">
                        <img src="{% static 'notes/images/search.png' %}" width="25" height="25">
                    </button>
                </div>
            </td>
        {%  endif %}
    {% endfor %}
 </form>]