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. Mathematics Unites was the theme for 2022, while in 2023 the theme was Mathematics for Everyone. 2024 saw the IDM focus on the theme Playing with Math.

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.

The theme for 2025 is:

Mathematics, Art and Creativity

The IDM is administered by the IDM Governing Board (IDMGB):

• Christiane Rousseau (Canada), Chair, 2019-2024
• Rachid Bebbouchi (Algeria), 2021-2024
• Laura Gomez Bermeo (Colombia), 2021-2024
• Hong-Bin Chen (Taiwan), 2023-2026
• Marcos Cherinda (Mozambique), 2023-2026
• Katie Chicot (UK), 2023-2026
• Oh Nam Kwon (Korea), 2021-2024
• Carlota Simões (Portugal), 2021-2024

Andreas Matt from IMAGINARY is in attendance of IDMGB. Günter Ziegler is the EC liaison person on the IDMGB.

Support for the International Day of Mathematics.

The IDM is supported by the following international and regional organizations:

• The International Council of Industrial and Applied Mathematics (ICIAM),
• The Committee for Women in Mathematics of IMU (CWM),
• The International Commission of Mathematical Instruction (ICMI),
• The African Mathematical Union (AMU),
• The European Mathematical Society (EMS),
• The Mathematical Council of the Americas (MCA)
• The Unión Matemática de América Latina y el Caribe (UMALCA),
• The Southeast Asian Mathematical Society (SEAMS)
• The Southern Africa Mathematical Sciences Association (SAMSA)
• The International Centre for Theoretical Physics (ICTP)
• The Centre international de mathématiques pures et appliquées (CIMPA)
• The Organization for Women in Science for the Developing World (OWSD)
• The African Women in Mathematics Association (AWMA)
• The African Mathematical Union Commission of African Women in Mathematics (AMU-CAWM)
• The European Women in Mathematics (EWM)
• International Science Council (ISC)

• Simons Foundation