I have a Fantome and the date system on the bottle denotes to drink the bottle by 5/12 (according to the notches). After researching, I came up with no leads as to their dating system. Any idea on how old this beer may be?
Dating their bottles once they stopped actually dating them (~2003) is nearly impossible. Not really an answer, but at least some thoughts about it: http://beeradvocate.com/community/threads/fantome-saison-aged-for-a-year.4174/#post-47273