To celebrate the 40th anniversary of the proof of the Four Color Theorem, and as a part of the 2017 sesquicentennial celebration of the founding of the University of Illinois, the Illinois Mathematics Department will hold a Four Color Fest, November 2-4, 2017. This multi-day event celebrates the mathematical, historical and cultural significance of Kenneth Appel and Wolfgang Haken’s achievement.  Learn more on the Four Color Fest website and read the article in Math Times.