I know that this isn’t really normal behaviour since most people use some kind of central feed aggregator these days. I happened to stop using one because I needed to trim expenses and I was only using my iPad to read anyway. But then I had to return the iPad (corporate device) and set up a new device with all the feeds I had exported from the iPad.
In this case, with several thousand unread articles, I’d love to be able to say “all articles published before January 1 can be considered read”… and before I finished my thought, I realized that the Today smart feed achieves this to some extent. I just happen to want a “Year to date” or “Last 30 days” smart feed. Doable? I’m not seeing anything in the help.