"Christmas at Hogwarts" (additionally known as "Ring the Hogwarts Bell" or "Cast a Christmas Spell") was a Christmas carol sung at Hogwarts School of Witchcraft and Wizardry. A group of ghost carollers could be seen singing this song around Christmastime in December 1991.[1] In the film adaptation of Harry Potter and the Philosopher's Stone, it is first heard when the snowfall season takes place. We then see Rubeus Hagrid bearing a freshly cut big pine tree, intended to make a Christmas…