Django DateFilter - input_format change

Question

I need to change input format just for one field. I need to accept 31/03/2020 instead of 3/31/2020. If I enter 3/31/2020 then it's works, but when try 31/03/2020 then appears Enter a valid date. This can be done global by DATETIME_INPUT_FORMATS but I'm looking for the way where input_format will apply only to one field.

This is what I currently have.

view.py

def customer(request, pk):
    customer = Customer.objects.get(id=pk)
    orders = customer.order_set.all()
    order_count = orders.count()

    myFilter = OrderFilter(request.GET, queryset=orders)
    orders = myFilter.qs

    context = {
        'customer': customer,
        'orders': orders,
        'order_count': order_count,
        'myFilter': myFilter
    }

return render(request, 'accounts/customer.html', context)

filter.py

class OrderFilter(FilterSet):

    start_date = DateFilter(field_name="date_created", lookup_expr='gte')

    class Meta:
    model = Order
    fields = ['product',  'status', 'note', 'start_date']

customer.html

<div class="row">
    <div class="col">
        <div class="card card-body">
            <form method="get">
            {{ myFilter.form }}
            <button class="btn btn-primary" type="submit">Search</button>
          </form>
        </div>
    </div>

</div>

I tried to add init object to the class but without success.

def __init__(self, *args, **kwargs):
        super(OrderFilter, self).__init__(*args, **kwargs)
        self.start_date = DateTimeField(input_formats=['%d-%m-%Y'])