[Clearly a little surprised at his admission, but she gives a shake of her head to absolve him of whatever debt he feels owed-- and the promise of cake!-- out of sheer willpowerpoliteness and courtesy]
Though I am grateful for the thought, that is unnecessary. I had pledged my sword to her long ago, thus I only fulfilled my duty as a knight. I am more pleased to learn of others who are also concerned for her. [Another bow of her head, and she relaxes back to take another drink from her mug before answering his question]
Winter would bring the celebration of the birth of Christ, and a time after that, Candlemas. However, only "Christmas" seems to have survived to the modern era.