[Answered ]-Django admin to display localised date format

DATE_INPUT_FORMATS and DATETIME_INPUT_FORMATS in settings.py are only respected when USE_I18N = False

If you have USE_I18N = True you need to use FORMAT_MODULE_PATH also and create some format module files, as described here:
https://docs.djangoproject.com/en/1.4/ref/settings/#format-module-path