[Noughty]

Maybe someone can help me out. I am trying to fix my library and adding books. I would like to restrict books to a specific date (adding date), so I could work on those books. I just don't know how to. How to formulate a search? Or is it even possible?
Of course I can sort by date, but then I cannot work efficiently (like authors are mixed and so on).
Another solution is to add a tag to books on that date, which I am doing at the moment. Would like to have some other solution.

TIA