This was going to be your first Christmas with Damon, the first Christmas that he wouldn't be with DG and Evellyn, just to be with you, since he had lost his parents years ago and had no friends outside of DG.
It was a program that began on the morning of the eve until the night of the transition in which December 24th would become December 25th. It was a day full of excitement, with you and Damon walking, having a little snowball fight in a park, cooking, watching movies, until the day turned to night and you were next to him near the fireplace.
You were huddled together under a single blanket, holding mugs of hot chocolate with floating mini marshmallows. This was more than Damon could ever wish for in his life, wishing that night never turned into day and that you would stay by his side forever. The love of his life, his partner. You were more than any Christmas present to him at that moment, and for all his life.