After celebrating Stump Day, Star sleeps. Marco then wakes her up to tell her that there is a surprise outside her room. Her friends greet her, as expected. (In fact, it is Star's birthday on the same day as Stump Day) Star tells them that she does not celebrate her birthday on the actual day, as she needs to worship the Stump but her friends think that it is fake. The party later escalates into an argument where Marco gets into a fight with Tom when he accuses Tom for forgetting Star's birthday and for being a bad boyfriend while Janna accuses Kelly for possibly developing a crush on Marco. Later Janna burns the Stump on the fireplace. This angers the Stump, and it captures her friends and her parents. They apologize for their actions, and worked together to make the Stump spare them. The family declares this day is the best Stump Day ever.
- Eden Sher as Star Butterfly
- Adam McArthur as Marco Diaz
- Rider Strong as Tom Lucitor
- Jenny Slate as Pony Head
- Abby Elliott as Janna Ordonia
- Dana Davis as Kelly
- According to Star and Marco's Guide to Mastering Every Dimension, Stump Day (shown to be Mewni's equivalent to Christmas) is also Star's birthday, meaning she turns fifteen in this episode, followed by her fourteenth birthday in "Star Comes to Earth".