There’s no doubt that Pinkie Pie loves parties, but birthday parties are by far her favorite. After all, what’s better than celebrating another year of life and one's accomplishments? But, when she stumbles upon a stallion who seems to hate them, she takes it upon herself to ensure that he too can look at the positive side of things and see a birthday for what it is: A time of celebrating one’s accomplishments over the last year, and that getting older is not a bad thing.