Pie Day is an annual celebration dedicated to Whole Cream Pies that occurs on March 14th, which is when Flippy's pie stand arrives in Toontown Central to supply Whole Cream Pies.
- Toontown's Pie Day celebration is in reference to Pi Day. In the United States, Pi Day is celebrated on March 14th because of its date being 3/14, which is the first three digits of pi (3.14). Pi, represented as π, is the mathematical constant most commonly known as the ratio of a circle's circumference to a diameter; the number itself never ends.
- Flippy's pie stand is the same stand that he used for one of his campaigns when he ran as a candidate for the Toon Council Presidential Elections, but with a different sign that says "Happy Pie Day!".
- Pie Day occurs right before March 15th.