Pi Day (March 14) was celebrated for the first time in 1988 by American physicist Larry Shaw.
Pi (often represented by the lower-case Greek letter π), one of the most well-known mathematical constants, is the ratio of a circle’s circumference to its diameter. For any circle, the distance around the edge is a little more than three times the distance across. Typing π into a calculator and pressing ENTER will yield the result 3.141592654, not because this value is exact, but because a calculator’s display is often limited to 10 digits.
Zero – the figure or symbol 0, which in the Arabic notation for numbers stands for the absence of quantity
Zero describes nothing, like how much extra money I have. The number zero as we know it arrived in the West circa 1200, most famously delivered by Italian mathematician Fibonacci[1] (aka Leonardo of Pisa), who brought it, along with the rest of the Arabic numerals, back from his travels to North Africa.
