Hmm, I know what you wanted. Didn’t work, I notice.
I know a bookmark will automatically update if I select the Jazz genre and then add more Jazz after I created the bookmark. It should do the same for dates. Researching now.
Update: Evidently the Bookmark automatic update feature doesn’t work for dates. Bummer. I just started trying to use it that way and never noticed that is wasn’t updated. Sorry.
A good request that should be a feature request, although the thread I looked at was three years old , so I don’t hold out much hope
.Bookmark and recently added question - #3 by andybob
As the above post indicates, one could always create a new filter, but that’s not what you (or I) would want.
Oddly, ‘Played in the last x day/month/year’ seems to work the way one would expect.