Question:  Day of Days is a live album by a band who celebrated their 30th anniversary with an event at one of the largest and most important castles in what country?
Sentence (from "The 30th Anniversary Celebration"): These shows were notable for having Dave Mustaine, Jason Newsted, Glenn Danzig, Ozzy Osbourne, Jerry Cantrell, Rob Halford, Apocalyptica, members of Diamond Head, and King Diamond join Metallica on stage for all appropriate songs.
Relevant evidence: No