I recently added a new model to my site, and I\'m using an admin.py file to specify exactly how I want it to appear in the admin site. It works great, but I can\'t figure ou
digging around I ended here but applied a different approach to my app.
Changing django admin default formats could be done changing the django locale formats for every type you want.
Put the following on your admin.py file (or settings.py) to change datetime default format at your django admin.
from django.conf.locale.es import formats as es_formats
es_formats.DATETIME_FORMAT = "d M Y H:i:s"
It will change the ModelAdmin's datetime formats on that file (or whole site if in settings).
It does not breaks admin datetime filters and order features as @Alan Illing has point out in comments .
hope this help in future
Extra info:
You can change it for every available locale in django, which are a lot.
You can change the following formats using this approach
from django.conf.locale.es import formats as es_formats
es_formats.DATETIME_FORMAT
es_formats.NUMBER_GROUPING
es_formats.DATETIME_INPUT_FORMATS
es_formats.SHORT_DATETIME_FORMAT
es_formats.DATE_FORMAT
es_formats.SHORT_DATE_FORMAT
es_formats.DATE_INPUT_FORMATS
es_formats.THOUSAND_SEPARATOR
es_formats.DECIMAL_SEPARATOR
es_formats.TIME_FORMAT
es_formats.FIRST_DAY_OF_WEEK
es_formats.YEAR_MONTH_FORMAT
es_formats.MONTH_DAY_FORMAT