The Fall 2017 Algebra and Number Theory Day will be held on Saturday, November 4, 2017 at the University of Maryland, College Park. The speakers will be Pierre Colmez (CNRS, UPMC), Davesh Maulik (MIT), Wieslawa Niziol (CNRS, ENS-Lyon/IAS), Nicolas Templier (Cornell), and Yihang Zhu (Columbia).