The International Day of Mathematics (IDM) is a worldwide celebration. Each year on March 14 all countries are invited to participate through activities for both students and the general public in schools, museums, libraries and other spaces. The website of the IDM is idm314.org.
The proclamation of March 14 as the International Day of Mathematics was adopted by the Executive Council of UNESCO at its 205th session. It was adopted by the 40th session of the General Conference of the UNESCO in November 2019. The inaugural celebration of the IDM took place on March 14, 2020. The theme for 2020 was Mathematics is Everywhere. An overview of the events and activities that took place within the scope of this theme can be found here. In 2021, the theme was Mathematics for a Better World. An overview of events can be found here.
A new theme every year: Every year we will announce a new theme to flavor the celebration, spark creativity and bring light to connections between mathematics and all sorts of fields, concepts and ideas.