Django在窗体上显示日期时间时忽略本地化设置

LANGUAGE_CODE = 'en-gb'
TIME_ZONE = 'Europe/London'
USE_I18N = True
USE_L10N = True
USE_TZ = True

有一个模型在“模型.py":

class Foo(models.Model):
    date_time = models.DateTimeField(null=True, blank=True)

class FooForm(forms.ModelForm):
    class Meta:
        model = Foo
        fields = ['date_time']

在模板中:

<form method="post">
    {% csrf_token %}
    <table>
        {{ form.as_table }}
    </table>
    <button type="submit">Submit</button>
    <button type="button" onclick="javascript:window.location='/dashboard';">Cancel
    </button>
</form>

 date_time = forms.DateTimeField(input_formats=['%d/%m/%Y %H:%M'])

……但没有任何效果。