Order Django queryset by upcoming birthdays

order_by_upcoming_birthdays.py

def order_by_upcoming_birthdays(qs, from_date=None, birthday_field_name='date_of_birth'):
    from_date = from_date or now().date()

    qs = users_qs.annotate(
            month=Extract(birthday_field_name, 'month'),
            day=Extract(birthday_field_name, 'day'))

    whens = []
    for i in range(12):
        whens.append(When(month=(from_date + relativedelta(months=i)).month, then=i))

    return qs.annotate(month_order=Case(
            *whens,
            output_field=IntegerField(),
            default=4)).order_by('month_order', 'day')