In My Singing Monsters: Dawn of Fire, the monsters still celebrated Christmas and other real-world celebrations. Special Occasions started in the 1.3.0 update, and from that day all the monsters on Continent dress up in costumes and decorate to celebrate Christmas, similar to how the Christmas Special Occasion was celebrated in the original game.
Young monsters dress up during the Festival of Yay. However, as they grow up in the Outer Islands, they might have lost their Christmas spirit. Below is a list of different changes to the game representing each different aspect of Christmas. (Please try getting more images of Christmas costumes for DoF at Christmas time. Thanks.) (Please check for differences at Continent, Outer Islands, etc.)
For an unknown reason, they only dressed in 2015, not in 2016.
Changes in Monsters
|Monster Name||Usual Appearance||Altered Appearance|
|Object of Change||Usual Appearance||Altered Appearance|