[ivanm]

When I plug in my device, Calibre shows a column labelled "Date", and the tooltip says that the lookup/search name is called "timestamp"... but no matter what I do, I can't seem to search using it. Even searching for "timestamp:true" returns no results.

(What I'm actually trying to do - in case I've fallen afoul of the X-Y problem - is to find which devices I've since modified in my library after adding it to my device, so I can update the version on my device. Since I manually update the "date" column in Calibre every time I make a change to a book, I'm hoping I can do a search of "date:>timestamp" or some such.)