Pi Approximation Day is celebrated on July 22, 2018. Pi Approximation Day is observed on July 22, since the fraction 22?7 is a common approximation of Pi.

We have placed a detailed description of this event on this page: **Pi Approximation Day 2017**. For further information please stop by there!

Worldwide

World

Sunday, the 22nd of July 2018

Only 449 days left!

**More dates:**

- Pi Approximation Day on Jul 22, 2017
- Pi Approximation Day on Jul 22, 2018
- Pi Approximation Day on Jul 22, 2019