Mathematics and Hope
The theme for the 2026 celebrates the connection between two of the most universal human possessions.
The International Day of Mathematics (IDM) is a worldwide celebration. Each year on March 14 all countries will be invited to participate through activities for both students and the general public in schools, museums, libraries and other spaces.
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Recent news
2025-02-17
We added a new poster with this year's theme. It comes in two versions, full-color and black-and-white you can color in with your friends.
2025-02-04
We added new activities to celebrate IDM with your students, including one inspired by the lunar eclipse that will take place next March 14.
2023-08-25
The UN General Assembly proclaimed 2024‑2033 as the International Decade of Sciences for Sustainable Development. Every year we will offer activities related to this topic.
2019-11-26
UNESCO proclaimed March 14 as the International Day of Mathematics on the 40th session of the General Conference on November 26, 2019.
March 14 is already celebrated in many countries as Pi Day because that date is written as 3/14 in some countries and the mathematical constant Pi is approximately 3.14.
The International Day of Mathematics is a project led by the International Mathematical Union with the support of numerous international and regional organizations.
Join the 2026 celebration
The best way to celebrate the IDM is to host your own event.
Discover ideas and activities to celebrate with your community or
in the classroom.
Get posters, pin designs, logos and many
ideas to decorate your event space.
Publish it in our map
We'll help people in your town find out about your event.Available a few months before IDM
In 2025 people and organizations all over the world hosted events in their cities:
Keep in touch and receive updates and news about the International Day of Mathematics via email
You will only receive one or two emails per month at most. Your personal data won't be shared with any third party nor used for any other purposes, and you can unsubscribe at any time.
The theme for 2026: Mathematics and Hope
Every year we announce a theme to flavor the celebration, spark creativity and bring light to connections between mathematics and all sorts of fields, concepts and ideas.
Thales said, "Hope is the most universal of all human possessions." More than 2,500 years later, we can also say that mathematics is one of the most universal human possessions.
Connecting hope and mathematics creates opportunities for deeper insight and knowledge. Mathematics gives us hope to understand reality and truth clearly, share common definitions, learn cooperation, use data responsibly, find win-win strategies, and more.
These are the official translations of the theme to different languages:
| English (US) | Mathematics and Hope |
|---|---|
| Arabic | الرياضيات والأمل |
| Chinese (Simplified) | 数学与希望 |
| Chinese (Traditional) | 數學與希望 |
| French | Mathématiques et Espoir |
| German | Mathematik und Hoffnung |
| Portuguese | Matemática e Esperança |
| Spanish | Las matemáticas y la esperanza |
| Turkish | Matematik ve Umut |
Creative worldwide challenges
Each year we invite you to participate in a creative challenge along with your class, family, friends, colleagues or community.
In 2020, you made short videos showing the many ways that Mathematics is Everywhere.
See the 2020 video
In 2021, you used mathematics to create posters sharing ways to make the world better.
Visit the 2021 poster gallery
In 2022, you teamed up, or explored your town, to take pictures with mathematics.
Explore the 2022 photo galleries
In 2023 , you surprised us with your creativity and artistry creating unique comics with mathematics.
Explore the comic gallery
In 2024 , we added Mathematics to things and places to create Math Remixes.
Explore the remix gallery