Today, November 23, 6th graders celebrate “Fibonacci Day” in honor of one of the most influential mathematicians of the Middle Ages – Leonardo Bonacci, also known as Leonardo Fibonacci.

Why November 23? Because when the date is written in mm/dd (11/23) format, the digits of the date form a Fibonacci sequence: 1,1,2,3.

A Fibonacci sequence is a series of numbers where one number is the sum of the two preceding numbers. For example: 1, 1, 2, 3… is a Fibonacci sequence.

And to learn more, watch the explanation of David, 6B student: Video