On 14 March, the International Day of Mathematics (IDM), proclaimed by UNESCO, will be held under the theme “Mathematics Unites”. This theme reflects that the planet shares one mathematical language, which is the language of science. Organized by the International Mathematical Union, the IDM features a mixture of virtual and face-to-face celebrations, including celebrations in classrooms. IDM 2022 is celebrated in more than 90 countries with over 1100 individual events.1 “This Day is all about remembering that mathematics concerns us all, that it writes the world and makes it intelligible. It is a gift of endless generosity: there is still so much to explore.“, says Audrey Azoulay, Director-General of UNESCO.