From the MAA website:

Join us August 3-6, 2022 at the Philadelphia Marriott Downtown in Philadelphia, Pennsylvania for MAA MathFest 2022! We are planning a triumphant return to a full in-person meeting, with a robust virtual component for remote attendance. More details to be announced here as they are made available. We are looking forward to seeing you!

Every summer, MAA MathFest presents the latest in mathematical research and education to diverse audiences across the nation. As the largest community of mathematicians, students, and enthusiasts, MAA is proud to bring an interactive, accessible, and informative experience to you this year.