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.


Recent news

Join our worldwide Photo Challenge for IDM 2022. Get some friends and take a picture of yourself with a mathematical thing!
We added Proofs without words, a new activity to celebrate mathematics in the classroom.
Our event map is back online, showing events for the 2022 celebration. Planning an avent? Let us know!
The theme for the 2022 IDM is Mathematics Unites.
Learn more!
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.

Take a look back at the celebrations, themes and worldwide challenges of the
2020 and 2021 editions of the International Day of Mathematics.

Join the 2022 celebration

The best way to celebrate the IDM is to host your own event.

Organize an event

Discover ideas and activities to celebrate with your community or in the classroom.

Prepare your venue

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 know about your event.

People and organizations all over the world announced events in their cities:

Are you planning an event for the 2022 IDM?

Let us know and we'll add it to our map!

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.

You can also follow us on Instagram, Facebook, Twitter and YouTube.
Share news about your IDM activities using the hashtag #idm314.

A new theme every year

Every year we'll 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 the 2022 International Day of Mathematics is
Mathematics Unites

It was proposed by Yuliya Nesterova, a graduate student from the University of Ottawa in Canada. She explains:

“Mathematics unites, to signal that it is a common language we all have and a common subject with which to find one another.”

Mathematics Unites