Brat Fest Underway News | May 28, 2023 | 0 | by Morgan McCarthy Brat Fest weekend is underway at the Alliant Energy Center in Madison. Brats, live music, and activities run through today and the fireworks show will light up the sky over Willow Island starting at 9:05 p.m. And the fireworks aren’t the end of Brat Fest. Brats by the case will go on sale Monday during the Brat Fest After-Fest Sale from 10 a.m. to 3 p.m. at the Alliant Energy Center parking lot. Cases cost 25 dollars and include 40 brats per case.