Today is π (pi) approximation day. In a large portion of the world, the date is represented as dd/mm, or 22/7. Although 22/7 exceeds π, it’s actually closer to the true value than that of π Day is.
3.14159265358 - 3.14 = .00159265358
3.14159265358 - (22/7) = -.001264489277