There is a paper on the dining table that shows the order of which you need to ring the bells that are in the lower rack of the kitchen top, if done correctly you'll trigger the Christmas event. Besides the scenery changing, you get two extra tasks to complete: Decorating the Christmas tree as well as building a Ginger Bread House.

Could we get a Christmas% as well as an AllEvent% or something alike? One for just the Christmas events and one for the whole game plus the christmas events.