Seconding Celebration, which this year seems exceptional, especially for a beer that can be had for $1/bottle (by the case at CostCo) or at least $7.99/sixpack. I don't know what the difference is, but it feels exceptionally fresh and hoppy and malty and... mmmm.
My Christmas Eve tradition of exactly two years is to have a glass of Maredsous on draught at a place nearby, either that afternoon or early evening, before or after the 5 pm church service. Most of the year it feels too big for the weather or whatever I'm up to next, but on Christmas Eve it even tastes better than Scaldis Noel.