title_body: Calibre: Difference between "Date" and "Published" When editing the metadata of a book on Calibre, there are two fields that seem to have the same meaning: "Date" and "Published". What's the difference between the two?
upvoted_answer: "The lookup names are pubdate (publication date) and date (calibre's "Date" column, usually the date you added the book to calibre)."
  
  http://faq.calibrecompanion.co/index.php?action=artikel&amp;cat=6&amp;id=22&amp;artlang=en