[Writing, worldbuilding] Happy December 10th also known as my canon's in-universe primary winter holiday, Canning Day!
Canning day is a tradition with long roots originating in regions of north Europe and Asia, solidified and named as a holiday more recently in 18th century Europe. It has dispersed across the world over time but is largely celebrated in the Northern hemisphere and is one of the worlds most celebrated holidays.
Its a celebration in anticipation of thriving through the darkness and cold of a harsh winter. This is celebrated by eating food preserved during the summer harvests since fresh produce is scarce. There is also a tradition of giving gifts, often practical winter wear or entertainment, to "keep you through the winter", as well as preserved sweets.
A Canning day larder- an often intricately carved or woven cabinet- has become traditional as a place for storing canning day goods before day-of, decorated with displays of figurines of family or winter scenes- based on a mythologized tradition of family hiding toys and gifts among the untouched winter food stores in pantries or cellars.
Tales of occasional elves, faeries in the form of reindeer or cardinals, or winter wizards sneaking in to trade food for blessings and goodies has popped up in myth and popular culture as well, encouraging children to avoid checking the larder until Canning day proper.
Modern canning day celebrations typically include a dinner made with mostly preserved ingredients- wines, dried meat, cheese, and preserved fruit are seen on historical plates, but the advent of canned food and the affordability of canned goods has led to the meal largely becoming one of casseroles and gelatin molds of various complexities.
The traditional sweets, unlike dinner, have changed very little- tins of Turkish delight, toffees, fruit cakes, dried fruits and nuts or seeds, honey candies, caramels, and sugar plums are still the go-to gift for friends and coworkers and cover many a surface. More modern additions to the traditional lineup include cookies, fudge, or other "soft" sweets.
Glitter and ribbon to represent clear winter night skies and auroras are traditional canning day decor, as well as nutcrackers, small wooden (or occasionally gingerbread) houses for animals or faeries, and a candle or hearth and pine boughs for warmth and heat.
In the US, Canning Day falls on December 10th and is celebrated with opening gifts, dinner, and spending time with community or family.