It's called a Christmas Cactus because it blooms around the holidays, specifically during December. It's a popular holiday plant because it adds a festive touch to homes and decorations. The red and pink flowers of the Christmas Cactus are especially beautiful and are often used in holiday wreaths and decorations. The name Christmas Cactus is also a reminder of the special season, and it's a reminder to take time to enjoy the beauty of the holiday season.