We often think of December as the entry to winter and to Christmas. In the middle ages, typically, winter featured much more dramatically than Christmas. The calendar pages in Books of Hours for December most often feature an image of hog butchering, a boar roast, or a boar hunt (sometimes they feature an image of St. John boiling in oil, or the baking of bread) as December labors of the month.
This wintery scene on the right of hog-butchering is the work of Simon Bening, from the Da Costa Hours (Belgium, Bruges, c. 1515) now in The Morgan Library. (MS M.399, f. 13v). You’ll notice that the landscape is snowy. The people are also dressed much more warmly. They appear to be bleeding out the hog. The boar was an important food source, though largely for the wealthy, especially the domesticated boar. While the head was regarded as a trophy, nothing was wasted, and all was used.
There’s a famous depiction of a boar hunt in Sir Gawain and the Green Knight, and a ceremonial feast after, featuring the boar, and of course there’s the still popular medieval Christmas “The Boar’s Head Carol” about the Christmas tide feast featuring the boar’s head as the ceremonial center piece, carried into the hall in a triumphant procession.