This is something from the “it kind of make sense that it exists, but it never crossed my mind to actually Google it” category.
Say you’ve been away from a GitHub project for a while and just returned to see what happened in the meantime. You’re a bit out of the loop and don’t feel like reading all 500+ semi-descriptive commit headings to get a rough idea, and there is no official changelog in sight.
One thing you can do to still get a picture is browse through closed issues on GitHub and as it turns out, you can easily filter them by the date range they have been updated last. When you then sort them by the number of comments as an indicator of scope and importance, you end up with a query like this.
There you go. Makeshift changelog for a time range of your choice.