Python 3.9 adds IANA time zone support. Its tzinfo implementations behave slightly differently from the pytz package used in Django when it comes to calculations crossing daylight-savings-time boundaries, so there is going to be a gradual process of replacement and deprecation in future versions.
(Via @simonw on Twitter)
Django podcast about speeding up your Django tests, featuring Adam Johnson, who literally wrote the book on the subject.
Having useful tests, and having them run quickly and often, is a cornerstone to reliable web development—something I am appreciating in Django all the more now I am working on not-Django for my day job.