St. Patrick's Day is a holiday in Toontown. St. Patrick's Day consists of going green.
This holiday is also the only time where you can obtain the Green Toon effect for a limited time, whether it be just green gloves or an entire splat of green plaint, depending on what Eugene decides to offer. To obtain the effect, visit Green Bean Jeans at Daisy Gardens on Oak Street and simply say the SpeedChat phrase: "It's easy to be green!".