I think that in 10 years time a scholar looking for materials on Italian politics would very much like to know if a book had been published in 2013 or 2014. In fact the month in 2013 would be useful, and I like the idea of adding a note.
Catalogers receiving the book in 2014 would know very well that it had been published in 2013, thanks to all those colleagues who had already recorded the fact. John Williams Technical Services Librarian Robert H. Evans Library Bologna, Italy