How to display human time (x days ago, or now) in django admin?

There is an accepted answer however I want to suggest another thing who came here for a solution which can be used in templates.

Django has a contrib package called django.contrib.humanize. Add this to your INSTALLED_APPS, then use {% load humanize %} in your template, after that, you can use value|naturaltime template tag. "value" will be your date.

Let's say content.created, which contains the creation date of your content. It's a datetimefield object. So, you can use this: content.created|naturaltime. It'll convert the date e.g from July 14, 2018 11:30 to "3 days 1 hour ago".

Check it on Django DOCS.

Turns out the template filters can be accessed directly from your Python codebase. Something like this:

from django.contrib.humanize.templatetags import humanize

class Example(models.Model):
    date = models.DateTimeField(auto_now_add=True)

    def get_date(self):
        return humanize.naturaltime(self.date)

The get_date() function can also be located within your CourseAdmin class.