Discover that doing daily mathematics can help keep your brain working in ways that verbal exercises can't in the Mathematics 2020 calendar. Stimulate the left side of your brain by providing you with an equation for every day of the year; the solution for which is the date, but the challenge lies in figuring how to arrive at the answer & possibly discovering more than one method of arriving there. The monthly photographs are accompanied by a spacious dated grid with moon phases & international holidays, that provides space to organise appointments, birthdays & reminders.