Fibonacci Day is celebrated on November 23rd because when the date is written in mm/dd format (11/23), it forms a section of the Fibonacci sequence. In this post I share several Fibonacci inspired activities to try with your kids! What is the Fibonacci sequence? The Fibonacci sequence is a sequence of numbers in which each new number is the sum of the previous two numbers. 1, 1, 2, 3, 5, 8, 13, 21, 34... and so on. (1+1=2), (1+2=3), (2+3=5).... Fibonacci numbers are often found in nature. Some examples are the number of petals on a flower (typically 3, 5, or 8), the arrangement of scales on a pinecone, the number of digits on a human hand or foot, the number of legs an octopus has, the number of legs a starfish has, and the number of eyes on a human face. The Golden Ratio The Golden Ratio is a ratio between two numbers that equals approximately 1.618. If you divide a Fibonacci number by the previous number in the sequence, you get approximately 1.618. This ratio is important because it