问题原因是我需要在 settings.py 文件中的ISO和UK日期格式，如下所示：

  DATE_INPUT_FORMATS =（'％d-％m-％Y'，'％Y-％m-％d'）
 pre> 

然后将forms.py调整为以下内容：
 类ClientDetailsForm（ModelForm）：
 date_of_birth = DateField（input_formats = settings.DATE_INPUT_FORMATS）
 class Meta：
 model = ClientDetails 
 
为什么？  USE_L10N = True 不能这样做我不知道！
 

  [感谢此和这个]  
 
Is there any way I can get django to store my data in postgresql as 'dd-mm-yyyy' (if required) and have the django forms validate for 'dd-mm-yyyy'?

(I have tried without much success things like:
DATE_INPUT_FORMATS = ('%d-%m-%Y')
USE_I18N = True
USE_L10N = True
And done a lot of googling but no success :(
The problem turned out to be that I needed both the ISO and UK date formats in the settings.py file like so:
DATE_INPUT_FORMATS = ('%d-%m-%Y','%Y-%m-%d')
and then the forms.py adjusted to the following:
class ClientDetailsForm(ModelForm):
    date_of_birth = DateField(input_formats=settings.DATE_INPUT_FORMATS)
    class Meta:
        model = ClientDetails
Why USE_L10N = True can't just do this I don't know!

[Thanks to this and this]