The Christmas tree is typically lit on Christmas Eve, as it is a tradition to decorate the tree and have it shining brightly in the days leading up to the holiday. Many families will have a special lighting ceremony or gathering where the tree is lit together, often accompanied by carols and hot cocoa. Some cities also have public tree lighting ceremonies, which can be a fun way to celebrate with the community. Overall, the lighting of the Christmas tree is a symbol of the beginning of the holiday season and is a joyful and exciting event.