November 23 is celebrated as Fibonacci Day
because when the date is written in the mm/dd format (11/23), the digits in the
date form a Fibonacci sequence: 1,1,2,3. A Fibonacci sequence is a series of
numbers where a number is the sum of the two numbers before it. For example: 1,
1, 2, 3...is a Fibonacci sequence. Here, 2 is the sum of the two numbers before
it (1+1). Similarly, 3 is the sum of the two numbers before it (1+2).
It is an annual holiday that honours one
of the most influential mathematicians of the Middle Ages - Leonardo Bonacci.
