What is in this image? Describe it as if you were explaining it to someone from the 15th century.

The image depicts a winter scene filled with frolic and cheer, akin to a tapestry illustration. In the center, a large plank of wood has runners attached beneath, which creates a contraption known as a "sled." This sled glides across the snow with great ease and speed. An armored knight, though not in traditional armor, but rather an outfit suitable for cold, lies flat on his belly upon this sled, speeding down a sloped bank of snow.Below this knight, three onlookers—clad in garments reminiscent of winter attire with hats and wrapped scarves—are cheering joyously. They wave their hands high in encouragement and glee, celebrating the brave descent of the knight on his sled. These observers too wear special attire for the winter, protecting them from the season''s bite.Although simplified in form and detail, this scene captures a moment of joy and leisure in the cold season, much like the celebrations and festivities you might observe during the Twelve Days of Christmas, albeit with a markedly different activity central to the enjoyment portrayed.