The song "Christmas Day" by The Rocking Horse Winner is a heartfelt holiday tune that tells the story of two families coming together through love and goodwill. The lyrics describe a special Christmas day when the love between two people will finally be realized, bringing the families closer together. The song reminisces about a winter day two years ago, when the love between the two families was touched by a rose, symbolizing the beauty and fragility of their love. The warmth of that winter day is remembered, and the singer expresses a deep affection for the person they shared it with. Overall, "Christmas Day" is a sentimental song about the power of love and the joy of coming together during the holiday season. It celebrates the magic of Christmas and the hope for a future filled with love and togetherness.