What is the tone of A Christmas Carol and how does it change in stave 4?

The main theme in this book is " Christmas Spirit " .

All of "A Christmas Carol " is about the celebration of Christmas and the good it inspires .

At Christmas , people forget their pointless disputes , selfishness , and the burdens of work in favor of friendship , charity and celebration .
Theme based around Christmas, miserly old man is shown the error of his ways by Three Christmas Ghosts