varia.website/plugins/always_modified/README.md

Always Modified

Say you want to sort by modified date/time in a theme template, but not all your articles have modified date/timestamps explicitly defined in article metadata. This plugin facilitates that sorting by assuming the modified date (if undefined) is equal to the created date.

Usage

1. Add ALWAYS_MODIFIED = True to your settings file.

2. Now you can sort by modified date in your templates:

   {% for article in articles|sort(reverse=True,attribute='modified') %}