Django form Datetime field valid error after add django.middleware.locale.LocaleMiddleware'

[广宏伟]

I use django version 1.10, When a add LocaleMiddleware into settings.py, form valid error. I have been makemessage and compile it

Here is my model and form, 

class User(AbstractUser):
    ...   
    is_first_login = models.BooleanField(default=False)
    date_expired = models.DateTimeField(default=date_expired_default, blank=True, null=True, verbose_name='Date expired')
    created_by = models.CharField(max_length=30, default='')

class UserAddForm(ModelForm):
    class Meta:
        model = User
        fields = [
            'username', 'name', 'email', 'groups', 'wechat',
            'phone', 'enable_otp', 'role', 'date_expired', 'comment',
        ]

        help_texts = {
            'username': '* required',
            'email': '* required',
        }

And settings.py

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.locale.LocaleMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

 

I also ask on stackoverflow http://stackoverflow.com/questions/39318887/django-form-datetime-field-valid-error-after-add-django-middleware-locale-locale

[广宏伟]

Resloved, datetime format issue, More see stackoverflow

在 2016年9月5日星期一 UTC+8上午12:15:35，广宏伟写道：