Comment 1 for bug 1254226

I'm not an expert with the code, but I suspect the field in question is DateCreated in the content table in database .kobo/KoboReader.sqlite . I think that a function like set_readstatus with some modifications could be used to do the work required in calibre.devices.kobo.driver using the update to set DateCreated instead of using the value chosen by the kobo when the book is copied via USB.