I've got a sixer of Dale's that says "Best Before March 31, 2014" on the bottom of each can. (It is labeled for export to Sweden, if that helps.) I'd always heard + seen that Oskar Blues did canned-on dates, and recommended drinking within four months. 3/31/14 is more than 4 months away - any idea how old these cans might be?
There should be a canned on date and a silly message if it's anything like here. Email them they are very responsive.