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

We added a new poster with this year's theme, and files to create your own pins to our Resources section.
Discover some of the ways in which mathematics improves the world in our Mathematics for a Better World website, dedicated to 2021's theme.
Find IDM celebrations close to your town in our event map. If you're hosting your own event let us know and we'll feature it.
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.

On March 14, 2020, the International Day of Mathematics had its first edition.
Take a look back at the celebration, and learn more about its theme, the worldwide video challenge and its global live launch.

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

Are you planning an event for the IDM? Let us know and we'll add it to our map!

Join the 2021 celebration

Organize an event

Ideas, activities and resources to celebrate the IDM the best way: by hosting your own event.

Prepare your venue

Get posters, IDM logos to make signs, pins and stickers, and many ideas to decorate your event space.

Publish it in our map

We'll help people in your town know about your event.

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 and Twitter.
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 2021 is Mathematics for a Better World

As the world faces the COVID-19 pandemic, mathematics provides its models and tools to help us understand, monitor, and control the spread of the virus. It is also used to create weather forecasts and prepare for natural disasters. It warns us of climate change and helps us to anticipate and mitigate its consequences.

Mathematics is central to the efficient organization of societies for the benefit of all citizens. It optimizes transportation and communication networks and enables smart planning and management of health, economic, and social systems. Science and mathematics have a crucial role in steering decisions to promote peace and social justice.

As a common language to the planet, mathematics is an essential part of humankind’s cultural heritage. It is present in arts, music, and games, for human enjoyment and well-being.

Visit the Mathematics for a Better World website