Because every transcendental number is irrational, any proof showing that pi is transcendental also proves that pi is irrational.

Pi Day is celebrated on March 14th (3/14 — see what they did there?) and is the perfect occasion for mathematicians to celebrate their favourite number.

What is the full pi number? It is impossible to calculate pi's exact value because it is an irrational number. Pi is the most famous irrational number.