International Day of Mathematics. March 14.

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 page to help you decorate and announce your event with poster templates, logos and some ideas to dress up your venue.
We published many downloadable activities you can use in your IDM event. More, plus new translations, are coming very soon.
Be part of our collective Worldwide Video by sending us a 15 second long clip where you surprise us with maths before February 21.
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.

Learn more
about the International Day of Mathematics Project

People and organizations all over the world are already preparing 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 celebration

Organize an event

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

Be part of our worldwide video

We're putting together a collectivo video for the official IDM launch. Join in with your 15 second clip.

Find an event near you

Soon you'll be able to get detailed information about IDM events in your town.
Coming soon

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.

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 2020 is Mathematics is Everywhere

  • Mathematics help plan and manage economic and social systems enabling the move towards a sustainable use of resources.
  • We travel the world guided by precise mathematical calculations based on the position of the sun, stars and GPS satellites.
  • We explore the inside of the human body through CT scans and MRI by building images out of numerical data through mathematical algorithms.
  • We discover how human thought works by building AI software that can learn and make decisions through mathematic models.
  • We photographed a black hole and continue exploring the edges of the universe with mathematics.

Support for the International Day of Mathematics

The International Day of Mathematics (IDM) is supported by the following international and regional organizations: