Technology National Pi Day 2019: All unique facts you need to know about ubiquitous, mysterious… March 14, 2019March 14, 2019 satyamadmin National Pi day 2019 Celebration: Î is an irrational number which means it cannot be expressed as a simple fraction and goes on forever (non-terminating), without repeating (non-periodic). Source: student panel Share Facebook Twitter Pinterest Linkedin