Warning about filtering queryset in ClassBasedViews

Following the example in https://docs.djangoproject.com/en/4.1/topics/class-based-views/generic-display/#viewing-subsets-of-objects I try the following

class BookListView(ListView):

    model = Book
    queryset = Book.objects.filter(publication_date__lte=timezone.now())

I found that this code snippet to retrieve only books that has the publication date before today (assuming that could be books with publication date in the future) not work as I would expected. 

After some digging, I found that timezone.now() it's cached when server starts up (in a production environment), so this query filter by the date the server was started. So the solution is to use a dynamic filtering. 

Could be a good idea to include some warning about this in the documentation? I have tried to find some information but I did not find anything.

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