Pi Approximation Day is celebrated on July 22, 2025. 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 2024**. For further information please stop by there!

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Tuesday, the 22nd of July 2025

Only 398 days left!

**More dates:**

- Pi Approximation Day on Jul 22, 2024
- Pi Approximation Day on Jul 22, 2025
- Pi Approximation Day on Jul 22, 2026